feat: replace Subject retirement with durable explicit deletion

crates/runtime-api/src/lib.rs

@@ -1193,8 +1193,40 @@ pub struct SubjectCreateRecoveryResponse {
     pub operation_id: String,
 }
 
+/// Host requests this only after durably fencing the Subject in Backend authority.
+/// Permanently exclude the Worker from creation and restoration, and confirm actual
+/// execution shutdown. This does not delete Worker or Session records.
+#[derive(Clone, Debug, Deserialize, Eq, PartialEq, Serialize)]
+#[serde(deny_unknown_fields)]
+pub struct SubjectDeleteWorkerRequest {
+    pub workspace_id: String,
+    pub worker_id: WorkerId,
+    pub create_fingerprint: String,
+    pub operation_id: String,
+}
+
+/// Durable admission exclusion plus confirmed execution shutdown/absence. Errors,
+/// timeouts and lost responses are unknown outcomes; retry the same full request.
+#[derive(Clone, Debug, Deserialize, Eq, PartialEq, Serialize)]
+#[serde(deny_unknown_fields)]
+pub struct SubjectDeleteWorkerResponse {
+    pub workspace_id: String,
+    pub worker_id: WorkerId,
+    pub create_fingerprint: String,
+    pub operation_id: String,
+    /// The canonical live Worker/Session/diagnostic aggregate is physically absent
+    /// under the permanent creation fence. False is not a deletion receipt.
+    pub originals_absent: bool,
+}
+
 #[api(reqwest, axum)]
 pub trait RuntimeApi {
+    #[post("/v1/subject-delete-worker", status = 200, error_status = 400)]
+    async fn subject_delete_worker(
+        &self,
+        #[body] request: SubjectDeleteWorkerRequest,
+    ) -> Result<SubjectDeleteWorkerResponse, RuntimeApiError>;
+
     #[post("/v1/subject-create-recovery", status = 200, error_status = 400)]
     async fn recover_subject_create(
         &self,
@@ -1755,6 +1787,19 @@ mod tests {
         ) -> Result<SessionMaterialPinResponse, RuntimeApiError> {
             Err(test_error(501))
         }
+        async fn subject_delete_worker(
+            &self,
+            request: SubjectDeleteWorkerRequest,
+        ) -> Result<SubjectDeleteWorkerResponse, RuntimeApiError> {
+            Ok(SubjectDeleteWorkerResponse {
+                originals_absent: true,
+                workspace_id: request.workspace_id,
+                worker_id: request.worker_id,
+                create_fingerprint: request.create_fingerprint,
+                operation_id: request.operation_id,
+            })
+        }
+
         async fn recover_subject_create(
             &self,
             request: SubjectCreateRecoveryRequest,
@@ -1934,6 +1979,19 @@ mod tests {
         assert_eq!(response.create_fingerprint, recovery.create_fingerprint);
         assert_eq!(response.operation_id, recovery.operation_id);
 
+        let deletion = SubjectDeleteWorkerRequest {
+            workspace_id: "workspace-a".into(),
+            worker_id: WorkerId::now_v7(),
+            create_fingerprint: "deleted-create".into(),
+            operation_id: "delete-1".into(),
+        };
+        let receipt = client
+            .subject_delete_worker(deletion.clone())
+            .await
+            .unwrap();
+        let mut expected = serde_json::to_value(deletion).unwrap();
+        expected["originals_absent"] = true.into();
+        assert_eq!(serde_json::to_value(receipt).unwrap(), expected);
         let summary = client.runtime_summary().await.unwrap();
         assert_eq!(summary.runtime.display_name.as_deref(), Some("round-trip"));
         let workers = client

crates/server-api/src/lib.rs

@@ -338,6 +338,8 @@ impl_openapi_schema!(
     MemoryConsolidationResponse,
     SubjektivSubjectCreateRequest,
     SubjektivSubjectBehaviorUpdateRequest,
+    SubjektivSubjectDeleteRequest,
+    SubjektivSubjectDeleteResponse,
     SubjektivSubjectListQuery,
     SubjektivSubjectListResponse,
     SubjektivSubjectResponse,
@@ -1527,19 +1529,21 @@ pub trait ServerApi {
         #[path] memory_id: String,
         #[query] query: SubjektivMemoryChangesQuery,
     ) -> Result<SubjektivMemoryListChangesResponse, RepositoryApiError>;
-    #[post(
-        "/api/w/{workspace_id}/subjektiv/subjects/{subject_id}/retire",
+    #[delete(
+        "/api/w/{workspace_id}/subjektiv/subjects/{subject_id}",
         status = 200,
         error_status = 400,
         additional_error_statuses = [401, 403, 404, 409, 500],
         bearer_auth = true,
         browser_auth = true,
     )]
-    async fn subjektiv_subject_retire(
+    async fn subjektiv_subject_delete(
         &self,
+        #[extension] context: ServerRequestContext,
         #[path] workspace_id: String,
         #[path] subject_id: String,
-    ) -> Result<SubjektivSubjectResponse, RepositoryApiError>;
+        #[body] request: SubjektivSubjectDeleteRequest,
+    ) -> Result<SubjektivSubjectDeleteResponse, RepositoryApiError>;
     #[post(
         "/api/w/{workspace_id}/subjektiv/staging",
         status = 200,
@@ -4955,6 +4959,8 @@ pub struct WorkspacePermissionSummary {
     pub manage_secrets: bool,
     pub manage_runtimes: bool,
     pub delete_workspace: bool,
+    /// Explicit Subject deletion authority for the current authenticated actor.
+    pub delete_subjects: bool,
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq, JsonSchema)]
@@ -5350,7 +5356,25 @@ pub struct MemoryConsolidationResponse {
 #[serde(rename_all = "snake_case")]
 pub enum SubjektivSubjectState {
     Active,
-    Retired,
+    /// Saved compatibility only; not a current lifecycle operation.
+    #[serde(rename = "retired")]
+    LegacyRetired,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq, JsonSchema)]
+#[serde(deny_unknown_fields)]
+pub struct SubjektivSubjectDeleteRequest {
+    /// Stable identity retained for every retry, including unknown outcomes.
+    pub operation_id: String,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq, JsonSchema)]
+#[serde(deny_unknown_fields)]
+pub struct SubjektivSubjectDeleteResponse {
+    pub subject_id: String,
+    pub operation_id: String,
+    /// False confirms the deletion fence, not external stop or erasure completion.
+    pub completed: bool,
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq, JsonSchema)]
@@ -10950,6 +10974,10 @@ pub fn memory_api_typescript() -> String {
 
 export type SubjektivSubjectCreateRequest = { role: string, behavior_md?: string, };
 
+export type SubjektivSubjectDeleteRequest = { operation_id: string, };
+
+export type SubjektivSubjectDeleteResponse = { subject_id: string, operation_id: string, completed: boolean, };
+
 export type SubjektivSubjectBehaviorUpdateRequest = { expected_behavior_md: string, behavior_md: string, };
 
 export type SubjektivSubjectResponse = { id: string, role: string, behavior_md: string, state: SubjektivSubjectState, memory_fingerprint: string, created_at: string, updated_at: string, current_worker?: | import("./worker-launch-api").WorkerLaunchWorkerSummary | null, };
@@ -13483,7 +13511,8 @@ mod tests {
                 "manage_repositories": true,
                 "manage_secrets": true,
                 "manage_runtimes": true,
-                "delete_workspace": true
+                "delete_workspace": true,
+                "delete_subjects": true
             },
             "extension_points": {
                 "store": "sqlite",

crates/server-api/tests/subject_delete_contract.rs

@@ -0,0 +1,49 @@
+use serde_json::json;
+use server_api::{
+    SubjektivSubjectDeleteRequest, SubjektivSubjectDeleteResponse, SubjektivSubjectState,
+};
+
+#[test]
+fn subject_delete_api_replaces_retire_and_requires_operation_identity() {
+    let document: serde_json::Value = serde_json::from_str(
+        &server_api::canonical_openapi_document()
+            .unwrap()
+            .to_json()
+            .unwrap(),
+    )
+    .unwrap();
+    let paths = &document["paths"];
+    assert!(
+        paths
+            .get("/api/w/{workspace_id}/subjektiv/subjects/{subject_id}/retire")
+            .is_none()
+    );
+    let operation = &paths["/api/w/{workspace_id}/subjektiv/subjects/{subject_id}"]["delete"];
+    assert_eq!(operation["operationId"], "subjektiv_subject_delete");
+    assert_eq!(operation["requestBody"]["required"], true);
+    assert!(serde_json::from_value::<SubjektivSubjectDeleteRequest>(json!({})).is_err());
+    assert!(
+        serde_json::from_value::<SubjektivSubjectDeleteRequest>(
+            json!({"operation_id":"op", "force":true})
+        )
+        .is_err()
+    );
+    for completed in [false, true] {
+        let response = SubjektivSubjectDeleteResponse {
+            subject_id: "subject".into(),
+            operation_id: "op".into(),
+            completed,
+        };
+        assert_eq!(
+            serde_json::to_value(response).unwrap(),
+            json!({"subject_id":"subject", "operation_id":"op", "completed":completed})
+        );
+    }
+}
+
+#[test]
+fn old_subject_state_is_explicit_saved_compatibility_not_a_new_operation() {
+    let state: SubjektivSubjectState = serde_json::from_value(json!("retired")).unwrap();
+    assert_eq!(state, SubjektivSubjectState::LegacyRetired);
+    assert_eq!(serde_json::to_value(state).unwrap(), json!("retired"));
+}

crates/subjektiv/README.md

@@ -12,3 +12,49 @@ Hosts retain body ownership across inactivity, reserve actual execution quiescen
 - [`api`]: shared Host operations and bounded responses
 - [`job`]: consolidation selection rules and result validation
 - [`journal`]: individually committed activity operations, source coverage, retry receipts, and bounded reading
+
+## Explicit Subject deletion
+
+`begin_subject_deletion(subject_id, operation_id)` commits a permanent content-free
+fence in this store **before** the Host stops execution or erases external content.
+The operation ID is unique within this storage scope. Exact retries return current
+saved state; a different key for that Subject or reuse for another Subject conflicts.
+Pending fences survive restart and a failed purge. Normal reads, writes, saved-receipt
+replay, cached Host/Journal contexts and authority lookup cannot use a fenced Subject.
+Subject discovery hides fenced records before pagination. SQL INSERT/UPDATE guards
+cover direct and indirect owners, checking both OLD and NEW ownership on UPDATE.
+Deleting a grant never restores non-Subject fallback: content-free Worker identity
+fences remain, and the Host must consult them before fallback authorization.
+
+The Host uses `subject_deletion` / `pending_subject_deletions` for recovery and
+`deletion_subject_workers` / `deletion_subject_sessions` / `deletion_subject_jobs`
+only as cleanup inventories, not authority or model-visible content. It must fence
+creation reservations, quiesce Workers and in-flight delivery, purge Job inputs/results
+and live Job execution copies, and clear resident/derived caches. Source Worker/Session
+originals and pre-existing archives have independent retention lifecycles: the Workspace
+Host archives source originals rather than erasing them. Those archives may contain
+previously injected Memory; Workdirs, Tickets, exports and external provider copies are
+also outside Subject content erasure. These boundaries must be explained to the user.
+The domain rechecks after out-of-DB capture callbacks and before returning Job read
+responses; already returned DTOs cannot be revoked by SQLite. Host lifecycle locking
+must cover delivery/reinjection of previously fetched content as well as finish.
+
+Only after external cleanup succeeds may the Host call
+`finish_subject_deletion(subject_id, operation_id)`. One transaction deletes Subject,
+Memory/history, staging/evidence, Surface snapshots/runs, permission sources/receipts,
+child grants, writer/session bindings, Journal content/generations/deliveries/receipts,
+links, and the Subject's `legacy_record_archive` rows. A purge error rolls back all
+those deletions without undoing the separately committed fence. Ordinary history
+retention and explicit Journal Session-erasure rules are unchanged for other Subjects.
+Retained records contain only deletion operation/time/completion and execution/session
+identities needed to prevent reuse; existing content-free Session-erasure markers and
+workspace-only migration metadata remain. Other Subjects and storage scopes are untouched.
+
+The deletion migration adds fences without erasing or reactivating existing data. Old `retired`
+JSON/SQL records deserialize as `SubjectState::LegacyRetired` and remain readable
+until explicitly deleted. There is no current retirement API. Normal Worker deletion
+still does not implicitly delete Subject memory.
+
+Completion means logical erasure from domain and Host-managed storage, **not** secure
+physical overwriting: SQLite free pages, WAL files, filesystem snapshots, backups and
+external copies can retain bytes under their own retention/erasure policies.

crates/subjektiv/src/api/context.rs

@@ -116,6 +116,7 @@ impl HostOperationContext {
                 "Host operation context belongs to another storage scope".into(),
             ));
         }
+        Self::require_subject(store, &self.subject_id)?;
         Ok(())
     }
 

crates/subjektiv/src/api/tests.rs

@@ -452,3 +452,45 @@ fn query_content_condition_ignores_behavior_and_detects_aba_memory_writes() {
         Err(OperationError::Conflict(_))
     ));
 }
+
+#[test]
+fn subject_deletion_revalidates_cached_body_empty_batch_and_receipt_contexts() {
+    let temp = tempfile::tempdir().unwrap();
+    let (_manager, store) = open(temp.path(), "scope");
+    let subject = store
+        .create_subject(SubjectRole::new("companion").unwrap())
+        .unwrap();
+    let body = HostOperationContext::validated_body(&store, &subject.id, None).unwrap();
+    let empty =
+        HostOperationContext::validated_consolidation(&store, &subject.id, Some(vec![]), None)
+            .unwrap();
+    store.begin_subject_deletion(&subject.id, "delete").unwrap();
+    for context in [&body, &empty] {
+        for operation in [
+            query(None),
+            Op::ListCandidates(server_api::SubjektivMemoryCandidateListRequest { limit: None }),
+            Op::ReceiptStatus(server_api::SubjektivMemoryReceiptStatusRequest {
+                receipt_id: "receipt".into(),
+            }),
+            Op::ReadCandidate(server_api::SubjektivMemoryCandidateReadRequest {
+                candidate_id: "candidate".into(),
+            }),
+        ] {
+            assert!(matches!(
+                execute(&store, context, operation),
+                Err(OperationError::SubjectNotFound(_))
+            ));
+        }
+    }
+    store
+        .finish_subject_deletion(&subject.id, "delete")
+        .unwrap();
+    assert!(
+        execute(
+            &store,
+            &empty,
+            Op::ListCandidates(server_api::SubjektivMemoryCandidateListRequest { limit: None })
+        )
+        .is_err()
+    );
+}

crates/subjektiv/src/deletion.rs

@@ -0,0 +1,419 @@
+//! Explicit Subject erasure is a two-phase Host operation. Beginning commits a permanent,
+//! content-free fence before the Host stops/removes Workers and purges Jobs and execution copies.
+//! Source Worker/Session originals remain under their separate archive lifecycle.
+//! Failure leaves that fence and the cleanup inventory intact; the Host retries
+//! the same operation ID. Finishing asserts that external cleanup succeeded and atomically erases
+//! this store's content. This store cannot verify external Runtime/Job/Session cleanup itself.
+//!
+//! Tombstones contain no behavior, permission vectors, Memory, Journal or Session text. Worker
+//! identities remain permanently fenced so removal of a grant cannot become non-Subject fallback
+//! authority. Existing Journal Session erasure markers are retained to reject delayed admission;
+//! they are content-free and are not a second copy of the deleted material.
+use super::*;
+
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
+#[serde(deny_unknown_fields)]
+pub struct SubjectDeletion {
+    pub subject_id: String,
+    pub operation_id: String,
+    pub completed: bool,
+    pub started_at: String,
+}
+
+/// Host-only cleanup identity, never Job input, output, profile or authorization material.
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct DeletionSubjectJob {
+    pub job_id: String,
+    pub attempt_id: String,
+}
+
+// All content tables are enumerated deliberately. Indirect tables are erased before their
+// owner rows, both for FK checks and so their fencing predicates remain resolvable.
+const INDIRECT: &[(&str, &str)] = &[
+    (
+        "journal_generation_input_deliveries",
+        "generation_id IN (SELECT g.id FROM journal_generations g JOIN journals j ON j.id=g.journal_id WHERE j.subject_id={subject})",
+    ),
+    (
+        "legacy_record_archive",
+        "json_extract(row_json, '$.subject_id')={subject}",
+    ),
+    (
+        "journal_generation_deliveries",
+        "generation_id IN (SELECT g.id FROM journal_generations g JOIN journals j ON j.id=g.journal_id WHERE j.subject_id={subject})",
+    ),
+    (
+        "journal_operations",
+        "journal_id IN (SELECT id FROM journals WHERE subject_id={subject})",
+    ),
+    (
+        "journal_generations",
+        "journal_id IN (SELECT id FROM journals WHERE subject_id={subject})",
+    ),
+    (
+        "journal_sources",
+        "journal_id IN (SELECT id FROM journals WHERE subject_id={subject})",
+    ),
+    (
+        "journal_session_bindings",
+        "binding_id IN (SELECT binding_id FROM journal_writer_bindings WHERE subject_id={subject})",
+    ),
+];
+const DIRECT: &[&str] = &[
+    "memory_journal_links",
+    "journal_corrections",
+    "journal_entries",
+    "journals",
+    "journal_writer_bindings",
+    "subject_session_attributions",
+    "worker_execution_grants",
+    "subject_permission_receipts",
+    "subject_permissions",
+    "subject_permission_changes",
+    "candidate_decision_receipts",
+    "surface_generation_state",
+    "surface_generation_runs",
+    "surface_snapshot_refs",
+    "surface_snapshot_seals",
+    "surface_snapshots",
+    "staging_resolution_targets",
+    "staging_resolution_seals",
+    "staging_resolutions",
+    "memory_change_candidates",
+    "memory_change_derivations",
+    "memory_change_seals",
+    "memory_changes",
+    "memory_records",
+    "staging_records",
+    "subjects",
+];
+
+fn owner_expression(table: &str, row: &str) -> String {
+    match table {
+        "legacy_record_archive" => format!("json_extract({row}.row_json, '$.subject_id')"),
+        "journal_generation_input_deliveries" | "journal_generation_deliveries" => format!(
+            "(SELECT j.subject_id FROM journal_generations g JOIN journals j ON j.id=g.journal_id WHERE g.id={row}.generation_id)"
+        ),
+        "journal_operations" | "journal_generations" | "journal_sources" => {
+            format!("(SELECT subject_id FROM journals WHERE id={row}.journal_id)")
+        }
+        "journal_session_bindings" => format!(
+            "(SELECT subject_id FROM journal_writer_bindings WHERE binding_id={row}.binding_id)"
+        ),
+        _ => format!("{row}.subject_id"),
+    }
+}
+
+pub(super) fn migrate(tx: &Transaction<'_>) -> feature_storage::Result<()> {
+    tx.execute_batch(
+        "CREATE TABLE subject_deletions (
+        subject_id TEXT PRIMARY KEY,
+        operation_id TEXT NOT NULL UNIQUE,
+        completed INTEGER NOT NULL CHECK(completed IN (0,1)),
+        started_at TEXT NOT NULL
+    );
+    CREATE TABLE subject_deleted_workers (
+        subject_id TEXT NOT NULL REFERENCES subject_deletions(subject_id) ON DELETE RESTRICT,
+        runtime_id TEXT NOT NULL,
+        worker_id TEXT NOT NULL,
+        PRIMARY KEY(subject_id,runtime_id,worker_id)
+    );
+    CREATE TABLE subject_deleted_sessions (
+        subject_id TEXT NOT NULL REFERENCES subject_deletions(subject_id) ON DELETE RESTRICT,
+        session_id TEXT NOT NULL UNIQUE,
+        PRIMARY KEY(subject_id,session_id)
+    );
+    CREATE TRIGGER subject_deleted_sessions_retained BEFORE DELETE ON subject_deleted_sessions
+        BEGIN SELECT RAISE(ABORT, 'deleted Session fences are permanent'); END;
+    CREATE TRIGGER subject_deleted_sessions_immutable BEFORE UPDATE ON subject_deleted_sessions
+        BEGIN SELECT RAISE(ABORT, 'deleted Session fences are immutable'); END;
+    CREATE INDEX subject_deleted_worker_identity ON subject_deleted_workers(runtime_id,worker_id);
+    CREATE TRIGGER subject_deletions_retained BEFORE DELETE ON subject_deletions
+        BEGIN SELECT RAISE(ABORT, 'Subject deletion fences are permanent'); END;
+    CREATE TRIGGER subject_deletions_identity BEFORE UPDATE ON subject_deletions
+        WHEN OLD.subject_id<>NEW.subject_id OR OLD.operation_id<>NEW.operation_id
+            OR OLD.started_at<>NEW.started_at OR OLD.completed>NEW.completed
+        BEGIN SELECT RAISE(ABORT, 'Subject deletion identity is permanent'); END;
+    CREATE TRIGGER subject_deleted_workers_retained BEFORE DELETE ON subject_deleted_workers
+        BEGIN SELECT RAISE(ABORT, 'deleted Worker fences are permanent'); END;
+    CREATE TRIGGER subject_deleted_workers_immutable BEFORE UPDATE ON subject_deleted_workers
+        BEGIN SELECT RAISE(ABORT, 'deleted Worker fences are immutable'); END;",
+    )?;
+
+    // Preserve each existing history-retention condition, adding only the explicit Subject
+    // erasure exception. Frozen earlier migrations are not edited. Normal history deletion
+    // (including another Subject's history) remains forbidden.
+    let triggers = tx
+        .prepare("SELECT name,tbl_name,sql FROM sqlite_master WHERE type='trigger'")?
+        .query_map([], |r| {
+            Ok((
+                r.get::<_, String>(0)?,
+                r.get::<_, String>(1)?,
+                r.get::<_, String>(2)?,
+            ))
+        })?
+        .collect::<std::result::Result<Vec<_>, _>>()?;
+    for (name, table, sql) in triggers {
+        if !DIRECT.contains(&table.as_str()) && !INDIRECT.iter().any(|(t, _)| *t == table) {
+            continue;
+        }
+        let upper = sql.to_ascii_uppercase();
+        if !upper.contains("BEFORE DELETE") {
+            continue;
+        }
+        let begin = upper.find("BEGIN").expect("trigger body");
+        let (header, body) = sql.split_at(begin);
+        let exception = format!(
+            "NOT EXISTS(SELECT 1 FROM subject_deletions WHERE subject_id={})",
+            owner_expression(&table, "OLD")
+        );
+        let header = if let Some(when) = header.to_ascii_uppercase().find("WHEN") {
+            format!(
+                "{} WHEN ({}) AND {exception} ",
+                &header[..when],
+                header[when + 4..].trim()
+            )
+        } else {
+            format!("{header} WHEN {exception} ")
+        };
+        tx.execute_batch(&format!("DROP TRIGGER \"{name}\"; {header}{body}"))?;
+    }
+    for table in DIRECT
+        .iter()
+        .copied()
+        .chain(INDIRECT.iter().map(|(t, _)| *t))
+        .chain(["journal_erased_sessions"])
+    {
+        for action in ["INSERT", "UPDATE"] {
+            let new_owner = owner_expression(table, "NEW");
+            let predicate = if action == "UPDATE" {
+                format!(
+                    "subject_id={new_owner} OR subject_id={}",
+                    owner_expression(table, "OLD")
+                )
+            } else {
+                format!("subject_id={new_owner}")
+            };
+            tx.execute_batch(&format!(
+                "CREATE TRIGGER deletion_fence_{table}_{action} BEFORE {action} ON {table}
+                WHEN EXISTS(SELECT 1 FROM subject_deletions WHERE {predicate})
+                BEGIN SELECT RAISE(ABORT, 'Subject deletion has begun'); END;"
+            ))?;
+        }
+    }
+    // Identity reuse must not reconnect purged content or turn a deleted child into
+    // an unscoped Worker. Check both old and new on ownership-changing UPDATEs.
+    for table in [
+        "subject_session_attributions",
+        "journal_writer_bindings",
+        "worker_execution_grants",
+    ] {
+        for action in ["INSERT", "UPDATE"] {
+            let rows = if action == "UPDATE" {
+                vec!["OLD", "NEW"]
+            } else {
+                vec!["NEW"]
+            };
+            let mut predicates = Vec::new();
+            for row in rows {
+                predicates.push(format!("EXISTS(SELECT 1 FROM subject_deleted_workers WHERE runtime_id={row}.runtime_id AND worker_id={row}.worker_id)"));
+                if table == "subject_session_attributions" {
+                    predicates.push(format!("EXISTS(SELECT 1 FROM subject_deleted_sessions WHERE session_id={row}.session_id)"));
+                }
+                if table == "worker_execution_grants" {
+                    predicates.push(format!("EXISTS(SELECT 1 FROM subject_deleted_workers WHERE runtime_id=json_extract({row}.record_json,'$.origin_runtime_id') AND worker_id=json_extract({row}.record_json,'$.origin_worker_id'))"));
+                }
+            }
+            tx.execute_batch(&format!("CREATE TRIGGER deletion_identity_{table}_{action} BEFORE {action} ON {table} WHEN {} BEGIN SELECT RAISE(ABORT, 'deleted Subject execution identity'); END;", predicates.join(" OR ")))?;
+        }
+    }
+    Ok(())
+}
+
+pub(crate) fn is_deleting(connection: &Connection, subject: &str) -> Result<bool> {
+    // Older migration fixtures deliberately use current Rust reads before upgrade. Production
+    // opens only registered current stores and must fail closed if the fence table is absent.
+    #[cfg(test)]
+    if !connection.query_row("SELECT EXISTS(SELECT 1 FROM sqlite_master WHERE name='subject_deletions' AND type='table')", [], |r|r.get::<_,bool>(0))? {
+        return Ok(false);
+    }
+    Ok(connection.query_row(
+        "SELECT EXISTS(SELECT 1 FROM subject_deletions WHERE subject_id=?1)",
+        [subject],
+        |r| r.get::<_, bool>(0),
+    )?)
+}
+
+pub(crate) fn require_not_deleting(connection: &Connection, subject: &str) -> Result<()> {
+    if is_deleting(connection, subject)? {
+        return Err(SubjektivError::SubjectNotFound(subject.into()));
+    }
+    Ok(())
+}
+pub(crate) fn require_live_worker(
+    connection: &Connection,
+    runtime: &str,
+    worker: &str,
+) -> Result<()> {
+    #[cfg(test)]
+    if !connection.query_row("SELECT EXISTS(SELECT 1 FROM sqlite_master WHERE name='subject_deleted_workers' AND type='table')", [], |r|r.get::<_,bool>(0))? { return Ok(()); }
+    if connection.query_row(
+        "SELECT EXISTS(SELECT 1 FROM subject_deleted_workers WHERE runtime_id=?1 AND worker_id=?2)",
+        params![runtime, worker],
+        |r| r.get::<_, bool>(0),
+    )? {
+        return Err(SubjektivError::AuthorizationDenied(
+            "Worker belongs to a deleted Subject".into(),
+        ));
+    }
+    Ok(())
+}
+
+pub(crate) fn deleted_session_subject(
+    connection: &Connection,
+    session: &str,
+) -> Result<Option<String>> {
+    #[cfg(test)]
+    if !connection.query_row("SELECT EXISTS(SELECT 1 FROM sqlite_master WHERE name='subject_deleted_sessions' AND type='table')", [], |r|r.get::<_,bool>(0))? { return Ok(None); }
+    Ok(connection
+        .query_row(
+            "SELECT subject_id FROM subject_deleted_sessions WHERE session_id=?1",
+            [session],
+            |r| r.get(0),
+        )
+        .optional()?)
+}
+
+fn deletion(connection: &Connection, subject: &str) -> Result<Option<SubjectDeletion>> {
+    Ok(connection.query_row("SELECT subject_id,operation_id,completed,started_at FROM subject_deletions WHERE subject_id=?1", [subject], |r|Ok(SubjectDeletion { subject_id:r.get(0)?, operation_id:r.get(1)?, completed:r.get(2)?, started_at:r.get(3)? })).optional()?)
+}
+fn require_deletion(connection: &Connection, subject: &str) -> Result<SubjectDeletion> {
+    deletion(connection, subject)?.ok_or_else(|| SubjektivError::SubjectNotFound(subject.into()))
+}
+
+impl SubjektivStore {
+    /// Commits the read/write/authority fence, even for legacy-retired Subjects. Operation IDs
+    /// are unique within this store's scope; neither another key nor another Subject may reuse
+    /// a deletion. Exact retries return the saved current result, including completed deletions.
+    pub fn begin_subject_deletion(
+        &self,
+        subject: &str,
+        operation: &str,
+    ) -> Result<SubjectDeletion> {
+        validate_label("subject id", subject)?;
+        validate_label("deletion operation id", operation)?;
+        self.database.try_transaction(|tx| {
+            if let Some(saved) = deletion(tx,subject)? {
+                return if saved.operation_id == operation { Ok(saved) } else { Err(SubjektivError::SubjectDeletionConflict(operation.into())) };
+            }
+            if tx.query_row("SELECT EXISTS(SELECT 1 FROM subject_deletions WHERE operation_id=?1)",[operation],|r|r.get::<_,bool>(0))? {
+                return Err(SubjektivError::SubjectDeletionConflict(operation.into()));
+            }
+            require_subject(tx,subject)?;
+            tx.execute("INSERT INTO subject_deletions(subject_id,operation_id,completed,started_at) VALUES(?1,?2,0,?3)",params![subject,operation,now()])?;
+            // Capture bodies, historical attribution, delegated children, and grant origins.
+            // This transaction also fences delayed grants/attributions, so no new identity can
+            // appear after the inventory is frozen. Runtime create reservations remain Host-owned.
+            tx.execute("INSERT INTO subject_deleted_workers(subject_id,runtime_id,worker_id)
+                SELECT subject_id,runtime_id,worker_id FROM subject_session_attributions WHERE subject_id=?1
+                UNION SELECT subject_id,runtime_id,worker_id FROM journal_writer_bindings WHERE subject_id=?1
+                UNION SELECT subject_id,runtime_id,worker_id FROM worker_execution_grants WHERE subject_id=?1
+                UNION SELECT subject_id,json_extract(record_json,'$.origin_runtime_id'),json_extract(record_json,'$.origin_worker_id') FROM worker_execution_grants WHERE subject_id=?1",[subject])?;
+            tx.execute("INSERT INTO subject_deleted_sessions(subject_id,session_id)
+                SELECT subject_id,session_id FROM subject_session_attributions WHERE subject_id=?1
+                UNION SELECT subject_id,source_session_id FROM journals WHERE subject_id=?1
+                UNION SELECT subject_id,session_id FROM journal_erased_sessions WHERE subject_id=?1", [subject])?;
+            require_deletion(tx,subject)
+        })
+    }
+
+    /// Host-only, content-free cleanup inventory. Usable after begin, including exact finish
+    /// retries. Tombstones survive finish to prevent non-Subject permission fallback.
+    pub fn deletion_subject_workers(&self, subject: &str) -> Result<Vec<(String, String)>> {
+        self.database.try_with_connection(|tx| {
+            require_deletion(tx,subject)?;
+            Ok(tx.prepare("SELECT runtime_id,worker_id FROM subject_deleted_workers WHERE subject_id=?1 ORDER BY runtime_id,worker_id")?.query_map([subject],|r|Ok((r.get(0)?,r.get(1)?)))?.collect::<std::result::Result<Vec<_>,_>>()?)
+        })
+    }
+
+    /// Host-only Session identities; retained source rows are never exposed through this path.
+    /// The Host must erase originals/archives before finish removes attribution.
+    pub fn deletion_subject_sessions(&self, subject: &str) -> Result<Vec<String>> {
+        self.database.try_with_connection(|tx| {
+            require_deletion(tx,subject)?;
+            Ok(tx.prepare("SELECT session_id FROM subject_deleted_sessions WHERE subject_id=?1 ORDER BY session_id")?.query_map([subject],|r|r.get(0))?.collect::<std::result::Result<Vec<_>,_>>()?)
+        })
+    }
+
+    /// Host-only Job cleanup inventory. Job storage owns inputs, outcomes and Worker archives;
+    /// this store retains only these identities until Host cleanup has succeeded.
+    pub fn deletion_subject_jobs(&self, subject: &str) -> Result<Vec<DeletionSubjectJob>> {
+        self.database.try_with_connection(|tx| {
+            require_deletion(tx,subject)?;
+            Ok(tx.prepare("SELECT job_id,attempt_id FROM surface_generation_runs WHERE subject_id=?1 AND job_id IS NOT NULL AND attempt_id IS NOT NULL UNION SELECT g.job_id,g.attempt_id FROM journal_generations g JOIN journals j ON j.id=g.journal_id WHERE j.subject_id=?1 ORDER BY 1,2")?.query_map([subject],|r|Ok(DeletionSubjectJob {job_id:r.get(0)?,attempt_id:r.get(1)?}))?.collect::<std::result::Result<Vec<_>,_>>()?)
+        })
+    }
+
+    /// Host-only recovery state; this never exposes Subject content or authority.
+    pub fn subject_deletion(&self, subject: &str) -> Result<Option<SubjectDeletion>> {
+        self.database
+            .try_with_connection(|tx| deletion(tx, subject))
+    }
+
+    /// Durable unfinished operations, including after Host restart. Completed tombstones
+    /// remain queryable individually but are not returned as pending work.
+    pub fn pending_subject_deletions(&self) -> Result<Vec<SubjectDeletion>> {
+        self.database.try_with_connection(|tx| {
+            Ok(tx.prepare("SELECT subject_id,operation_id,completed,started_at FROM subject_deletions WHERE completed=0 ORDER BY started_at,subject_id")?
+                .query_map([], |r| Ok(SubjectDeletion { subject_id:r.get(0)?, operation_id:r.get(1)?, completed:r.get(2)?, started_at:r.get(3)? }))?
+                .collect::<std::result::Result<Vec<_>,_>>()?)
+        })
+    }
+
+    pub fn worker_subject_deleted(&self, runtime: &str, worker: &str) -> Result<bool> {
+        self.database.try_with_connection(|tx| Ok(tx.query_row("SELECT EXISTS(SELECT 1 FROM subject_deleted_workers WHERE runtime_id=?1 AND worker_id=?2)",params![runtime,worker],|r|r.get(0))?))
+    }
+
+    /// Host confirmation that external cleanup is complete. All Subject content and completed
+    /// receipt commit together. Deferred FKs allow cyclic current/history references to disappear
+    /// without weakening FK enforcement outside this transaction. Failure rolls back all erasure.
+    pub fn finish_subject_deletion(
+        &self,
+        subject: &str,
+        operation: &str,
+    ) -> Result<SubjectDeletion> {
+        self.database.try_transaction(|tx| {
+            let saved = require_deletion(tx, subject)?;
+            if saved.operation_id != operation {
+                return Err(SubjektivError::SubjectDeletionConflict(operation.into()));
+            }
+            if saved.completed {
+                return Ok(saved);
+            }
+            tx.execute_batch("PRAGMA defer_foreign_keys=ON;")?;
+            for (table, predicate) in INDIRECT {
+                tx.execute(
+                    &format!(
+                        "DELETE FROM {table} WHERE {}",
+                        predicate.replace("{subject}", "?1")
+                    ),
+                    [subject],
+                )?;
+            }
+            for table in DIRECT {
+                tx.execute(
+                    &format!("DELETE FROM {table} WHERE subject_id=?1"),
+                    [subject],
+                )?;
+            }
+            tx.execute(
+                "UPDATE subject_deletions SET completed=1 WHERE subject_id=?1",
+                [subject],
+            )?;
+            require_deletion(tx, subject)
+        })
+    }
+}
+
+#[cfg(test)]
+mod tests;

crates/subjektiv/src/deletion/tests.rs

@@ -0,0 +1,489 @@
+use super::*;
+use crate::tests::{candidate, legacy_retired_fixture, open_store, role};
+use feature_storage::FeatureStorage;
+use memory::extract::CandidateKind;
+
+fn draft() -> MemoryDraft {
+    MemoryDraft::active(
+        CandidateKind::Lesson,
+        "private claim",
+        "private body",
+        "useful",
+        "initial",
+    )
+}
+
+fn count(store: &SubjektivStore, table: &str) -> i64 {
+    store
+        .database
+        .try_with_connection::<_, SubjektivError>(|c| {
+            Ok(c.query_row(&format!("SELECT COUNT(*) FROM {table}"), [], |r| r.get(0))?)
+        })
+        .unwrap()
+}
+
+#[test]
+fn fence_only_denies_content_reads_writes_and_exact_replay_before_purge() {
+    let temp = tempfile::tempdir().unwrap();
+    let (_manager, _scope, store) = open_store(temp.path(), "workspace-a");
+    let subject = store
+        .create_subject_with_behavior(role(), "private behavior".into())
+        .unwrap();
+    let id = &subject.id;
+    let attribution = SubjectSessionAttribution::new(id, "runtime", "worker", "session").unwrap();
+    store
+        .record_session_attribution(attribution.clone())
+        .unwrap();
+    let staged = candidate(id, "candidate", store.workspace_id());
+    store.stage_candidate(staged.clone()).unwrap();
+    let request = CandidateDecisionRequest {
+        request_id: "decision".into(),
+        candidate_id: "candidate".into(),
+        reason: "adopt".into(),
+        decision: CandidateDecision::Apply {
+            target: MemoryChangeTarget::Create,
+            draft: draft(),
+        },
+    };
+    let memory = store
+        .decide_candidate(id, request.clone())
+        .unwrap()
+        .memory
+        .unwrap();
+    let generation = store
+        .prepare_job_surface_generation(id, Some(("job", "attempt")))
+        .unwrap();
+    let snapshot = store
+        .publish_surface_generation(
+            id,
+            &generation.id,
+            vec![SurfacePoint {
+                body_md: "private surface".into(),
+                memory_refs: vec![MemoryChangeRef {
+                    memory_id: memory.id.clone(),
+                    change_id: memory.change_id.clone(),
+                }],
+            }],
+        )
+        .unwrap();
+    let fence = store.begin_subject_deletion(id, "delete").unwrap();
+    assert!(!fence.completed);
+    // The fence must work while every body remains physically present.
+    assert_eq!(count(&store, "subjects"), 1);
+    assert_eq!(count(&store, "memory_records"), 1);
+    assert_eq!(count(&store, "candidate_decision_receipts"), 1);
+    assert!(store.subject(id).unwrap().is_none());
+    assert!(store.list_subjects(1).unwrap().items.is_empty());
+    macro_rules! denied { ($($result:expr),+ $(,)?) => { $(assert!($result.is_err(), stringify!($result));)+ }; }
+    denied!(
+        store.session_attribution("session"),
+        store.subject_session_attributions(id),
+        store.subject_session_attribution_page(id, None, "2999", None, 1),
+        store.record_session_attribution(attribution),
+        store.staging_candidate(id, "candidate"),
+        store.pending_staging_candidates(id, 1),
+        store.pending_staging_backlog(id),
+        store.staging_resolution(id, "candidate"),
+        store.memory(id, &memory.id),
+        store.memory_change(id, &memory.id, memory.change_id.clone()),
+        store.scoped_memory(id, &memory.id),
+        store.scoped_memory_change(id, &memory.id, memory.change_id.clone()),
+        store.list_memories(id),
+        store.list_memory_changes(id, &memory.id),
+        store.memory_fingerprint(id),
+        store.surface_snapshot(id, &snapshot.id),
+        store.resident_surface(id),
+        store.resident_context(id),
+        store.require_job_surface_generation(id, &generation.id, "job", "attempt"),
+        store.validate_job_surface_outcome(
+            id,
+            &generation.id,
+            generation.memory_fingerprint,
+            "ready",
+            Some(&snapshot.id),
+            None,
+            "job",
+            "attempt"
+        ),
+        store.prepare_surface_generation(id),
+        store.publish_surface_generation(id, &generation.id, vec![]),
+        store.fail_surface_generation(id, &generation.id, "failed"),
+        store.update_subject_behavior(id, &subject.behavior_md, "late behavior".into()),
+        store.stage_candidate(staged),
+        store.decide_candidate(id, request),
+        store.create_memory(id, draft()),
+        store.subject_permissions(id),
+        store.list_subject_worker_execution_grants(id),
+    );
+    assert_eq!(
+        store.deletion_subject_workers(id).unwrap(),
+        vec![("runtime".into(), "worker".into())]
+    );
+    assert_eq!(
+        store.deletion_subject_sessions(id).unwrap(),
+        vec!["session"]
+    );
+    assert_eq!(store.deletion_subject_jobs(id).unwrap()[0].job_id, "job");
+    assert!(store.worker_subject_deleted("runtime", "worker").unwrap());
+    assert!(
+        store
+            .finish_subject_deletion(id, "delete")
+            .unwrap()
+            .completed
+    );
+    for table in DIRECT {
+        assert_eq!(count(&store, table), 0, "{table}");
+    }
+    assert!(store.worker_execution_grant("runtime", "worker").is_err());
+    assert_eq!(
+        store.deletion_subject_sessions(id).unwrap(),
+        vec!["session"]
+    );
+    assert_eq!(
+        store.finish_subject_deletion(id, "delete").unwrap(),
+        store.begin_subject_deletion(id, "delete").unwrap()
+    );
+}
+
+#[test]
+fn purge_failure_rolls_back_content_but_not_the_committed_fence_and_restart_recovers() {
+    let temp = tempfile::tempdir().unwrap();
+    let id: String;
+    let pending;
+    {
+        let (manager, scope, store) = open_store(temp.path(), "workspace-a");
+        id = store.create_subject(role()).unwrap().id;
+        store.create_memory(&id, draft()).unwrap();
+        pending = store.begin_subject_deletion(&id, "delete").unwrap();
+        store.database.try_with_connection::<_, SubjektivError>(|c| {
+            c.execute_batch("CREATE TRIGGER injected_failure BEFORE DELETE ON subjects BEGIN SELECT RAISE(ABORT, 'simulated purge failure'); END;")?;
+            Ok(())
+        }).unwrap();
+        assert!(store.finish_subject_deletion(&id, "delete").is_err());
+        assert_eq!(count(&store, "memory_records"), 1);
+        assert_eq!(count(&store, "memory_changes"), 1);
+        assert_eq!(store.subject_deletion(&id).unwrap(), Some(pending.clone()));
+        drop(store);
+        drop(scope);
+        manager.shutdown().unwrap();
+    }
+    let (_manager, _scope, store) = open_store(temp.path(), "workspace-a");
+    assert_eq!(
+        store.pending_subject_deletions().unwrap(),
+        vec![pending.clone()]
+    );
+    assert_eq!(
+        store.begin_subject_deletion(&id, "delete").unwrap(),
+        pending
+    );
+    assert!(store.list_memories(&id).is_err());
+    store
+        .database
+        .try_with_connection::<_, SubjektivError>(|c| {
+            c.execute_batch("DROP TRIGGER injected_failure")?;
+            Ok(())
+        })
+        .unwrap();
+    assert!(
+        store
+            .finish_subject_deletion(&id, "delete")
+            .unwrap()
+            .completed
+    );
+    assert!(store.pending_subject_deletions().unwrap().is_empty());
+}
+
+#[test]
+fn deletion_identity_conflicts_are_scope_wide_but_do_not_cross_workspaces() {
+    let temp = tempfile::tempdir().unwrap();
+    let (_manager, _scope, store) = open_store(temp.path(), "workspace-a");
+    let a = store.create_subject(role()).unwrap().id;
+    let b = store.create_subject(role()).unwrap().id;
+    let saved = store.begin_subject_deletion(&a, "same-key").unwrap();
+    assert_eq!(store.begin_subject_deletion(&a, "same-key").unwrap(), saved);
+    for result in [
+        store.begin_subject_deletion(&a, "different"),
+        store.begin_subject_deletion(&b, "same-key"),
+        store.finish_subject_deletion(&a, "different"),
+    ] {
+        assert!(matches!(
+            result,
+            Err(SubjektivError::SubjectDeletionConflict(_))
+        ));
+    }
+    assert!(store.begin_subject_deletion("absent", "new-key").is_err());
+    assert!(store.finish_subject_deletion(&b, "same-key").is_err());
+    let page = store.list_subjects(1).unwrap();
+    assert_eq!(page.items[0].id, b);
+    assert!(!page.has_more);
+    store.finish_subject_deletion(&a, "same-key").unwrap();
+    store.create_memory(&b, draft()).unwrap();
+    let (_other_manager, _other_scope, other) = open_store(temp.path(), "workspace-b");
+    assert!(other.subject_deletion(&a).unwrap().is_none());
+    assert!(other.begin_subject_deletion(&b, "same-key").is_err());
+    let c = other.create_subject(role()).unwrap().id;
+    other.begin_subject_deletion(&c, "same-key").unwrap();
+    assert_eq!(store.list_memories(&b).unwrap().len(), 1);
+    let fresh = store.create_subject(role()).unwrap().id;
+    assert!(store.list_memories(&fresh).unwrap().is_empty());
+    assert!(store.subject_permissions(&fresh).unwrap().is_none());
+}
+
+#[test]
+fn concurrent_begin_and_write_serialize_and_exact_finish_is_replayable() {
+    let temp = tempfile::tempdir().unwrap();
+    let (_manager, _scope, store) = open_store(temp.path(), "workspace-a");
+    let id = store.create_subject(role()).unwrap().id;
+    let barrier = std::sync::Barrier::new(3);
+    std::thread::scope(|scope| {
+        let a = scope.spawn(|| {
+            barrier.wait();
+            store.begin_subject_deletion(&id, "delete")
+        });
+        let b = scope.spawn(|| {
+            barrier.wait();
+            store.create_memory(&id, draft())
+        });
+        barrier.wait();
+        assert!(!a.join().unwrap().unwrap().completed);
+        // A write either precedes begin and is later purged, or loses to the fence.
+        let _ = b.join().unwrap();
+    });
+    assert!(store.create_memory(&id, draft()).is_err());
+    assert_eq!(store.pending_subject_deletions().unwrap().len(), 1);
+    store.finish_subject_deletion(&id, "delete").unwrap();
+    assert_eq!(count(&store, "memory_records"), 0);
+}
+
+#[test]
+fn every_subject_owned_table_has_old_and_new_sql_fences_and_retention_is_scoped() {
+    let temp = tempfile::tempdir().unwrap();
+    let (_manager, _scope, store) = open_store(temp.path(), "workspace-a");
+    let a = store.create_subject(role()).unwrap().id;
+    let b = store.create_subject(role()).unwrap().id;
+    store
+        .stage_candidate(candidate(&a, "a", store.workspace_id()))
+        .unwrap();
+    store
+        .stage_candidate(candidate(&b, "b", store.workspace_id()))
+        .unwrap();
+    store.begin_subject_deletion(&a, "delete").unwrap();
+    store.database.try_with_connection::<_, SubjektivError>(|c| {
+        let tables = c.prepare("SELECT name FROM sqlite_master WHERE type='table' AND name NOT LIKE 'sqlite_%'")?.query_map([], |r| r.get::<_,String>(0))?.collect::<std::result::Result<Vec<_>,_>>()?;
+        for table in tables {
+            let columns = c.prepare(&format!("PRAGMA table_info({table})"))?.query_map([], |r| r.get::<_,String>(1))?.collect::<std::result::Result<Vec<_>,_>>()?;
+            if !columns.iter().any(|v| v == "subject_id") || table.starts_with("subject_delet") { continue; }
+            assert!(DIRECT.contains(&table.as_str()) || table == "journal_erased_sessions", "unclassified Subject table: {table}");
+        }
+        for table in DIRECT.iter().copied().chain(INDIRECT.iter().map(|v| v.0)).chain(["journal_erased_sessions"]) {
+            let sql: String = c.query_row("SELECT sql FROM sqlite_master WHERE name=?1", [format!("deletion_fence_{table}_UPDATE")], |r| r.get(0))?;
+            assert!(sql.contains("OLD.") && sql.contains("NEW."), "{table}: {sql}");
+        }
+        // OLD fenced -> NEW unfenced must not evade a guard.
+        assert!(c.execute("UPDATE subjects SET subject_id=?2 WHERE subject_id=?1", params![a, "new-id"]).is_err());
+        assert!(c.execute("UPDATE subjects SET subject_id=?2 WHERE subject_id=?1", params![b, a]).is_err());
+        assert!(c.execute("DELETE FROM staging_records WHERE subject_id=?1", [&b]).is_err());
+        assert!(c.execute("DELETE FROM subject_deletions WHERE subject_id=?1", [&a]).is_err());
+        assert!(c.execute("UPDATE subject_deletions SET operation_id='changed' WHERE subject_id=?1", [&a]).is_err());
+        Ok(())
+    }).unwrap();
+    store.finish_subject_deletion(&a, "delete").unwrap();
+    assert!(store.staging_candidate(&b, "b").unwrap().is_some());
+}
+
+#[test]
+fn legacy_retired_is_readable_serde_compatible_and_explicitly_deletable() {
+    let temp = tempfile::tempdir().unwrap();
+    let (_manager, _scope, store) = open_store(temp.path(), "workspace-a");
+    let id = store.create_subject(role()).unwrap().id;
+    store.create_memory(&id, draft()).unwrap();
+    legacy_retired_fixture(&store, &id).unwrap();
+    assert_eq!(
+        serde_json::from_str::<SubjectState>("\"retired\"").unwrap(),
+        SubjectState::LegacyRetired
+    );
+    assert_eq!(
+        serde_json::to_string(&SubjectState::LegacyRetired).unwrap(),
+        "\"retired\""
+    );
+    assert_eq!(store.list_memories(&id).unwrap().len(), 1);
+    assert!(store.create_memory(&id, draft()).is_err());
+    store.begin_subject_deletion(&id, "delete-legacy").unwrap();
+    store.finish_subject_deletion(&id, "delete-legacy").unwrap();
+    assert_eq!(count(&store, "memory_changes"), 0);
+}
+
+#[test]
+fn migration_preserves_legacy_content_until_explicit_delete_including_archive() {
+    let temp = tempfile::tempdir().unwrap();
+    let id: String;
+    {
+        let manager = FeatureStorage::new(temp.path());
+        let scope = manager.workspace("workspace-a").unwrap();
+        let registration = scope
+            .register(FeatureRegistration::new(
+                SUBJEKTIV_FEATURE_ID,
+                &MIGRATIONS[..6],
+            ))
+            .unwrap();
+        let store = SubjektivStore::open(&scope, &registration).unwrap();
+        id = "legacy-subject".into();
+        store.database.try_transaction::<_, SubjektivError>(|tx| {
+            let raw = serde_json::json!({"schema_version":1,"id":id,"role":"workspace_companion","behavior_md":"legacy private behavior","state":"active","created_at":"2026-01-01","updated_at":"2026-01-01"}).to_string();
+            tx.execute("INSERT INTO subjects(subject_id,role,state,store_revision,record_json,created_at,updated_at) VALUES(?1,'workspace_companion','active',0,?2,'2026-01-01','2026-01-01')", params![id,raw])?;
+            Ok(())
+        }).unwrap();
+        // Build a saved SQL fixture rather than using current-only APIs against an old schema.
+        store
+            .database
+            .try_transaction::<_, SubjektivError>(|tx| {
+                let raw: String = tx.query_row(
+                    "SELECT record_json FROM subjects WHERE subject_id=?1",
+                    [&id],
+                    |r| r.get(0),
+                )?;
+                let mut value: serde_json::Value = serde_json::from_str(&raw)?;
+                value["state"] = "retired".into();
+                tx.execute(
+                    "UPDATE subjects SET state='retired',record_json=?2 WHERE subject_id=?1",
+                    params![id, value.to_string()],
+                )?;
+                Ok(())
+            })
+            .unwrap();
+        drop(store);
+        drop(scope);
+        manager.shutdown().unwrap();
+    }
+    let (_manager, _scope, store) = open_store(temp.path(), "workspace-a");
+    assert_eq!(
+        store.subject(&id).unwrap().unwrap().state,
+        SubjectState::LegacyRetired
+    );
+    assert!(count(&store, "legacy_record_archive") > 1);
+    store.begin_subject_deletion(&id, "delete").unwrap();
+    store.finish_subject_deletion(&id, "delete").unwrap();
+    store.database.try_with_connection::<_, SubjektivError>(|c| {
+        let remaining: i64 = c.query_row("SELECT COUNT(*) FROM legacy_record_archive WHERE json_extract(row_json,'$.subject_id')=?1", [&id], |r|r.get(0))?;
+        assert_eq!(remaining, 0);
+        // Workspace-only metadata remains and is not a copy of the Subject's content.
+        assert_eq!(c.query_row("SELECT COUNT(*) FROM legacy_record_archive WHERE source_table='store_scope'", [], |r|r.get::<_,i64>(0))?, 1);
+        Ok(())
+    }).unwrap();
+}
+
+#[test]
+fn concurrent_deletions_on_independent_connections_save_one_request_identity() {
+    let temp = tempfile::tempdir().unwrap();
+    let (_manager, _scope, store) = open_store(temp.path(), "workspace-a");
+    let (_second_manager, _second_scope, second) = open_store(temp.path(), "workspace-a");
+    let id = store.create_subject(role()).unwrap().id;
+    let barrier = std::sync::Barrier::new(3);
+    std::thread::scope(|scope| {
+        let a = scope.spawn(|| {
+            barrier.wait();
+            store.begin_subject_deletion(&id, "first")
+        });
+        let b = scope.spawn(|| {
+            barrier.wait();
+            second.begin_subject_deletion(&id, "second")
+        });
+        barrier.wait();
+        let results = [a.join().unwrap(), b.join().unwrap()];
+        assert_eq!(results.iter().filter(|r| r.is_ok()).count(), 1);
+        assert_eq!(
+            results
+                .iter()
+                .filter(|r| matches!(r, Err(SubjektivError::SubjectDeletionConflict(_))))
+                .count(),
+            1
+        );
+    });
+    let saved = second.subject_deletion(&id).unwrap().unwrap();
+    assert_eq!(
+        store
+            .begin_subject_deletion(&id, &saved.operation_id)
+            .unwrap(),
+        saved
+    );
+    std::thread::scope(|scope| {
+        let a = scope.spawn(|| store.finish_subject_deletion(&id, &saved.operation_id));
+        let b = scope.spawn(|| second.finish_subject_deletion(&id, &saved.operation_id));
+        assert_eq!(a.join().unwrap().unwrap(), b.join().unwrap().unwrap());
+    });
+}
+
+#[test]
+fn deletion_migration_failure_rolls_back_fences_and_trigger_rewrites_then_retries() {
+    let temp = tempfile::tempdir().unwrap();
+    let id;
+    {
+        let manager = FeatureStorage::new(temp.path());
+        let scope = manager.workspace("workspace-a").unwrap();
+        let registration = scope
+            .register(FeatureRegistration::new(
+                SUBJEKTIV_FEATURE_ID,
+                &MIGRATIONS[..13],
+            ))
+            .unwrap();
+        let store = SubjektivStore::open(&scope, &registration).unwrap();
+        id = store.create_subject(role()).unwrap().id;
+        store
+            .stage_candidate(candidate(&id, "preserved", store.workspace_id()))
+            .unwrap();
+        store.database.try_with_connection::<_, SubjektivError>(|c| {
+            // Fail near the end, after retention triggers have already been rewritten.
+            c.execute_batch("CREATE TRIGGER deletion_fence_journal_sources_INSERT BEFORE INSERT ON journal_sources BEGIN SELECT 1; END;")?;
+            Ok(())
+        }).unwrap();
+        drop(store);
+        drop(scope);
+        manager.shutdown().unwrap();
+    }
+    let manager = FeatureStorage::new(temp.path());
+    let scope = manager.workspace("workspace-a").unwrap();
+    let current = SubjektivStore::register(&scope).unwrap();
+    assert!(SubjektivStore::open(&scope, &current).is_err());
+    drop(scope);
+    manager.shutdown().unwrap();
+    let manager = FeatureStorage::new(temp.path());
+    let scope = manager.workspace("workspace-a").unwrap();
+    // Reopen only the fixture's pre-deletion registration to inspect the failed migration.
+    let old = scope
+        .register(FeatureRegistration::new(
+            SUBJEKTIV_FEATURE_ID,
+            &MIGRATIONS[..13],
+        ))
+        .unwrap();
+    let store = SubjektivStore::open(&scope, &old).unwrap();
+    store
+        .database
+        .try_with_connection::<_, SubjektivError>(|c| {
+            assert!(!c.query_row(
+                "SELECT EXISTS(SELECT 1 FROM sqlite_master WHERE name='subject_deletions')",
+                [],
+                |r| r.get::<_, bool>(0)
+            )?);
+            let sql: String = c.query_row(
+                "SELECT sql FROM sqlite_master WHERE name='staging_records_no_delete'",
+                [],
+                |r| r.get(0),
+            )?;
+            assert!(!sql.contains("subject_deletions"));
+            assert!(
+                c.execute("DELETE FROM staging_records WHERE subject_id=?1", [&id])
+                    .is_err()
+            );
+            c.execute_batch("DROP TRIGGER deletion_fence_journal_sources_INSERT;")?;
+            Ok(())
+        })
+        .unwrap();
+    drop(store);
+    drop(scope);
+    manager.shutdown().unwrap();
+    let (_manager, _scope, store) = open_store(temp.path(), "workspace-a");
+    assert!(store.staging_candidate(&id, "preserved").unwrap().is_some());
+    assert!(store.pending_subject_deletions().unwrap().is_empty());
+    store.begin_subject_deletion(&id, "delete").unwrap();
+    store.finish_subject_deletion(&id, "delete").unwrap();
+}

crates/subjektiv/src/journal/binding.rs

@@ -39,6 +39,7 @@ fn denied() -> JournalError {
 }
 
 pub(super) fn check_writer(tx: &Connection, host: &JournalHostContext) -> JournalResult<()> {
+    crate::require_subject_in_connection(tx, &host.subject_id)?;
     let attr = host.attribution.as_ref().ok_or_else(denied)?;
     let binding = host.writer_binding_id.as_ref().ok_or_else(denied)?;
     if !tx.query_row("SELECT EXISTS(SELECT 1 FROM journal_writer_bindings b JOIN journal_session_bindings s ON s.binding_id=b.binding_id WHERE b.binding_id=?1 AND b.subject_id=?2 AND b.runtime_id=?3 AND b.worker_id=?4 AND b.active=1 AND s.session_id=?5)", params![binding,host.subject_id,attr.runtime_id,attr.worker_id,attr.session_id], |r| r.get::<_,bool>(0))? {
@@ -63,6 +64,7 @@ impl SubjektivStore {
         binding: &JournalWriterBinding,
     ) -> JournalResult<Option<String>> {
         self.database.try_with_connection(|tx| {
+            crate::require_subject_in_connection(tx, &binding.subject_id)?;
             Ok(tx.query_row("SELECT j.source_session_id FROM journals j JOIN journal_session_bindings s ON s.session_id=j.source_session_id WHERE j.subject_id=?1 AND s.binding_id=(SELECT binding_id FROM journal_writer_bindings WHERE subject_id=?1 AND active=0 ORDER BY rowid DESC LIMIT 1) ORDER BY j.updated_at DESC,j.id DESC LIMIT 1", [&binding.subject_id], |r| r.get(0)).optional()?)
         })
     }
@@ -77,6 +79,7 @@ impl SubjektivStore {
         worker: &str,
     ) -> JournalResult<bool> {
         self.database.try_with_connection(|tx| {
+            crate::require_subject_in_connection(tx, subject)?;
             Ok(tx.query_row(
                 "SELECT NOT EXISTS(SELECT 1 FROM journal_writer_bindings
                    WHERE subject_id=?1 AND runtime_id=?2 AND worker_id=?3)
@@ -95,12 +98,14 @@ impl SubjektivStore {
         worker: &str,
     ) -> JournalResult<bool> {
         self.database.try_with_connection(|tx| {
+            crate::require_subject_in_connection(tx, subject)?;
             Ok(tx.query_row("SELECT EXISTS(SELECT 1 FROM journal_writer_bindings WHERE subject_id=?1 AND runtime_id=?2 AND worker_id=?3 AND active=0)", params![subject,runtime,worker], |r| r.get(0))?)
         })
     }
 
     pub fn journal_writer_active(&self, binding: &JournalWriterBinding) -> JournalResult<bool> {
         self.database.try_with_connection(|tx| {
+            crate::require_subject_in_connection(tx, &binding.subject_id)?;
             Ok(tx.query_row("SELECT EXISTS(SELECT 1 FROM journal_writer_bindings WHERE binding_id=?1 AND subject_id=?2 AND runtime_id=?3 AND worker_id=?4 AND active=1)", params![binding.binding_id,binding.subject_id,binding.runtime_id,binding.worker_id], |r| r.get(0))?)
         })
     }
@@ -111,6 +116,7 @@ impl SubjektivStore {
         session: &str,
     ) -> JournalResult<bool> {
         self.database.try_with_connection(|tx| {
+            crate::require_subject_in_connection(tx, &binding.subject_id)?;
             Ok(tx.query_row("SELECT EXISTS(SELECT 1 FROM journal_session_bindings WHERE binding_id=?1 AND session_id=?2)", params![binding.binding_id,session], |r| r.get(0))?)
         })
     }
@@ -135,6 +141,8 @@ impl SubjektivStore {
             }
         }
         self.database.try_transaction(|tx| {
+            crate::require_subject_in_connection(tx, subject)?;
+            crate::deletion::require_live_worker(tx, runtime, worker)?;
             let state: Option<String> = tx.query_row("SELECT state FROM subjects WHERE subject_id=?1", [subject], |r| r.get(0)).optional()?;
             if state.as_deref() != Some("active") { return Err(JournalError::PermissionDenied("Subject is absent or retired".into())); }
             let current: Option<JournalWriterBinding> = tx.query_row("SELECT subject_id,runtime_id,worker_id,binding_id FROM journal_writer_bindings WHERE subject_id=?1 AND active=1", [subject], |r| Ok(JournalWriterBinding { subject_id:r.get(0)?,runtime_id:r.get(1)?,worker_id:r.get(2)?,binding_id:r.get(3)? })).optional()?;
@@ -200,6 +208,7 @@ impl SubjektivStore {
     /// It never fixes an open entry or declares the represented work complete.
     pub fn release_journal_writer(&self, binding: &JournalWriterBinding) -> JournalResult<()> {
         self.database.try_transaction(|tx| {
+            crate::require_subject_in_connection(tx, &binding.subject_id)?;
             let active: Option<bool> = tx.query_row("SELECT active FROM journal_writer_bindings WHERE binding_id=?1 AND subject_id=?2 AND runtime_id=?3 AND worker_id=?4",params![binding.binding_id,binding.subject_id,binding.runtime_id,binding.worker_id],|r|r.get(0)).optional()?;
             let Some(active) = active else { return Err(denied()); };
             if !active { return Ok(()); }

crates/subjektiv/src/journal/memory_links/tests.rs

@@ -1158,3 +1158,69 @@ fn failed_link_migration_rolls_back_ddl_and_preserves_existing_data_for_retry()
     assert_eq!(linked(&f.links(&selector, true).sources[0]).1, entry);
     assert_eq!(f.snapshot(), before);
 }
+
+#[test]
+fn subject_deletion_denies_all_memory_journal_context_and_reconcile_entry_points() {
+    let f = Fixture::new();
+    let staged = f.stage("candidate", &[0]);
+    let selector = f.apply(&staged);
+    let entry = f.fixed("entry", 0, vec![]);
+    f.links(&selector, true);
+    f.store()
+        .begin_subject_deletion(&f.host.subject_id, "delete")
+        .unwrap();
+    for request in [
+        MemoryJournalRequest::Links {
+            selector: selector.clone(),
+        },
+        MemoryJournalRequest::Reconcile {
+            selector: selector.clone(),
+        },
+        MemoryJournalRequest::LinksPage {
+            selector: selector.clone(),
+            source_offset: 0,
+            limit: 1,
+        },
+        MemoryJournalRequest::ReconcilePage {
+            selector: selector.clone(),
+            source_offset: 0,
+            limit: 1,
+        },
+        MemoryJournalRequest::Read {
+            selector,
+            source_index: 0,
+            journal_id: f.journal_id.clone(),
+            entry_id: entry.clone(),
+            expected_token: None,
+            byte_offset: 0,
+            max_bytes: 8,
+        },
+        MemoryJournalRequest::Related {
+            journal_id: f.journal_id.clone(),
+            entry_id: entry,
+            after: None,
+            limit: 1,
+        },
+    ] {
+        assert!(matches!(
+            f.store().execute_memory_journal(&f.host, request),
+            Err(JournalError::Subject(
+                crate::SubjektivError::SubjectNotFound(_)
+            ))
+        ));
+    }
+    f.store()
+        .finish_subject_deletion(&f.host.subject_id, "delete")
+        .unwrap();
+    f.store()
+        .database
+        .try_with_connection::<_, JournalError>(|c| {
+            assert_eq!(
+                c.query_row("SELECT COUNT(*) FROM memory_journal_links", [], |r| r
+                    .get::<_, i64>(0))?,
+                0
+            );
+            Ok(())
+        })
+        .unwrap();
+}

crates/subjektiv/src/journal/recording.rs

@@ -63,6 +63,10 @@ impl JournalInput {
         // below operates on this value only, never by making another live capture request.
         let budget = job::MAX_JOB_INPUT_BYTES.saturating_sub(envelope);
         input.capture = capture_once(journal.process_order, journal.process_byte, budget)?;
+        // Capture runs outside SQLite; a delayed callback cannot deliver deleted content.
+        store
+            .database
+            .try_with_connection(|tx| super::store::check_host(store, tx, host, true))?;
         input.selected_ranges = capture_ranges(&input.capture)?;
         if input.selected_ranges.is_empty() {
             return Ok(input);

crates/subjektiv/src/journal/service.rs

@@ -469,6 +469,11 @@ fn execute_inner(
             Ok::<_, JournalError>(())
         })?;
     }
+    // Also check empty source reads and Initial snapshot responses (no delivery write).
+    store.database.try_with_connection(|tx| {
+        super::store::job(store, tx, context, false)?;
+        Ok::<_, JournalError>(())
+    })?;
     Ok(response)
 }
 

crates/subjektiv/src/journal/store.rs

@@ -105,6 +105,7 @@ pub(super) fn check_session_host(
             "different storage scope".into(),
         ));
     }
+    crate::require_subject_in_connection(tx, &host.subject_id)?;
     let attr = host
         .attribution
         .as_ref()
@@ -134,6 +135,7 @@ pub(super) fn check_host(
             "different storage scope".into(),
         ));
     }
+    crate::require_subject_in_connection(tx, &host.subject_id)?;
     if write {
         let state: String = tx.query_row(
             "SELECT state FROM subjects WHERE subject_id=?1",

crates/subjektiv/src/journal/tests.rs

@@ -349,7 +349,7 @@ mod input_delivery {
             open_action("must not save"),
             f.ranges.clone(),
         );
-        f.store().retire_subject(&f.host.subject_id).unwrap();
+        crate::tests::legacy_retired_fixture(f.store(), &f.host.subject_id).unwrap();
         f.reopen();
         assert!(matches!(
             service::attest_input_delivery(f.store(), &ctx, &digest(), &f.ranges),
@@ -1210,6 +1210,21 @@ mod snapshot_inputs {
             service::finish(f.store(), &recovery).unwrap(),
             saved_completion
         );
+        // Deletion, unlike writer release, invalidates even exact saved input/completion replay.
+        f.store()
+            .begin_subject_deletion(&host.subject_id, "delete")
+            .unwrap();
+        subject_deleted(
+            f.store()
+                .prepare_journal_input(&host, &input, generation.job.clone()),
+        );
+        subject_deleted(service::finish(f.store(), &recovery));
+        subject_deleted(JournalJobContext::validated_recovery(
+            f.store(),
+            &host,
+            &generation.id,
+            generation.job.clone(),
+        ));
     }
 
     #[test]
@@ -2833,7 +2848,7 @@ fn job_service_source_reads_are_generation_bound_and_stop_at_supplied_byte_end()
 #[test]
 fn explicit_erasure_remains_available_for_retired_subject_without_reopening_recording() {
     let f = Fixture::new();
-    f.store().retire_subject(&f.host.subject_id).unwrap();
+    crate::tests::legacy_retired_fixture(f.store(), &f.host.subject_id).unwrap();
     assert!(f.store().journal_retention_required(&f.host).unwrap());
     f.store()
         .erase_journal_session(&f.host, "erase-retired")
@@ -4086,10 +4101,7 @@ fn retired_subject_keeps_reader_access_but_rejects_existing_write_context() {
         },
         vec![],
     );
-    fixture
-        .store()
-        .retire_subject(&fixture.host.subject_id)
-        .unwrap();
+    crate::tests::legacy_retired_fixture(fixture.store(), &fixture.host.subject_id).unwrap();
     assert!(matches!(
         fixture.store().execute_journal(&ctx, late),
         Err(JournalError::PermissionDenied(_))
@@ -5745,3 +5757,311 @@ fn late_gap_admission_and_partial_updates_reject_stale_source_page_cursors() {
         Err(JournalError::InvalidInput(_))
     ));
 }
+
+fn subject_deleted<T: std::fmt::Debug>(result: JournalResult<T>) {
+    assert!(
+        matches!(
+            result,
+            Err(JournalError::Subject(
+                crate::SubjektivError::SubjectNotFound(_)
+            ))
+        ),
+        "unexpected result: {result:?}"
+    );
+}
+
+#[test]
+fn subject_deletion_fence_denies_all_journal_read_write_binding_and_recovery_paths() {
+    use transport::{
+        JournalJobRequest as Request, JournalSnapshot, JournalTextRead, JournalTextTarget,
+    };
+    let mut f = Fixture::new();
+    let (generation, ctx) = f.generation("delete-job", f.ranges.clone());
+    let operation = f.operation(
+        "saved",
+        open_action("private body"),
+        vec![f.ranges[0].clone()],
+    );
+    let receipt = f.store().execute_journal(&ctx, operation.clone()).unwrap();
+    let entry = receipt.entry_id.unwrap();
+    let reader = JournalHostContext::validated_reader(f.store(), &f.host.subject_id).unwrap();
+    let writer = f
+        .store()
+        .claim_journal_writer(&f.host.subject_id, "runtime", "worker")
+        .unwrap();
+    let digest = format!("sha256:{}", "a".repeat(64));
+    service::attest_input_delivery(f.store(), &ctx, &digest, &f.ranges).unwrap();
+    f.store().database.try_transaction::<_, JournalError>(|tx| {
+        tx.execute("INSERT INTO journal_generation_deliveries(generation_id,source_order,ranges_json) VALUES(?1,0,'[]')", [&generation.id])?;
+        Ok(())
+    }).unwrap();
+    f.store().database.try_transaction::<_, JournalError>(|tx| {
+        tx.execute("INSERT INTO legacy_record_archive(source_table,row_position,row_json) VALUES('subjects',0,?1)", [serde_json::json!({"subject_id":f.host.subject_id,"record_json":"archived private body"}).to_string()])?;
+        Ok(())
+    }).unwrap();
+    f.store()
+        .begin_subject_deletion(&f.host.subject_id, "delete")
+        .unwrap();
+    // Exercise actual SQL owner resolution for *every* indirect content table,
+    // not only table-name inventory. Fence errors must precede PK/immutable/FK errors.
+    f.store()
+        .database
+        .try_with_connection::<_, JournalError>(|tx| {
+            for (table, field, new_owner) in [
+                ("journal_sources", "journal_id", "other-journal"),
+                ("journal_operations", "journal_id", "other-journal"),
+                ("journal_generations", "journal_id", "other-journal"),
+                ("journal_session_bindings", "binding_id", "other-binding"),
+                (
+                    "journal_generation_deliveries",
+                    "generation_id",
+                    "other-generation",
+                ),
+                (
+                    "journal_generation_input_deliveries",
+                    "generation_id",
+                    "other-generation",
+                ),
+                (
+                    "legacy_record_archive",
+                    "row_json",
+                    "{\"subject_id\":\"other-subject\"}",
+                ),
+            ] {
+                assert!(
+                    tx.query_row(&format!("SELECT COUNT(*) FROM {table}"), [], |r| r
+                        .get::<_, i64>(0))?
+                        > 0,
+                    "{table}"
+                );
+                let insert = tx
+                    .execute(&format!("INSERT INTO {table} SELECT * FROM {table}"), [])
+                    .unwrap_err();
+                assert!(
+                    insert.to_string().contains("Subject deletion has begun"),
+                    "{table}: {insert}"
+                );
+                let update = tx
+                    .execute(&format!("UPDATE {table} SET {field}=?1"), [new_owner])
+                    .unwrap_err();
+                assert!(
+                    update.to_string().contains("Subject deletion has begun"),
+                    "{table}: {update}"
+                );
+            }
+            Ok(())
+        })
+        .unwrap();
+    macro_rules! denied { ($($result:expr),+ $(,)?) => { $(subject_deleted($result);)+ }; }
+    for host in [&f.host, &reader] {
+        denied!(
+            f.store().list_journals(host, None, 1),
+            f.store().read_journal(host, &f.journal_id),
+            f.store().list_journal_entries(host, &f.journal_id, None, 1),
+            f.store().read_journal_text(
+                host,
+                &f.journal_id,
+                Some(&entry),
+                JournalTextField::Body,
+                None,
+                0,
+                8
+            ),
+            f.store().read_journal_source(host, &f.journal_id, 0),
+            f.store().list_journal_sources(host, &f.journal_id, None, 1),
+            f.store()
+                .query_journal_operation(host, &f.journal_id, "saved"),
+            f.store()
+                .read_journal_operation_status(host, &f.journal_id, "saved"),
+            f.store()
+                .read_journal_operation_coverage(host, &f.journal_id, "saved", 0, 1),
+            f.store()
+                .list_journal_operations(host, &f.journal_id, None, 1),
+            f.store().journal_entry_summary(host, &f.journal_id, &entry),
+            f.store()
+                .journal_correction_targets(host, &f.journal_id, &entry),
+            f.store()
+                .browse_journal_entries(host, None, None, None, None, 1),
+            f.store()
+                .journal_has_unreflected_sources(host, &f.journal_id),
+            f.store().journal_startup_snapshot(host, None),
+        );
+    }
+    denied!(
+        f.store().journal_compaction_snapshot(&f.host),
+        f.store().journal_session_erased(&f.host),
+        f.store().journal_for_session(&f.host),
+        f.store().journal_retention_required(&f.host),
+        f.store().erase_journal_session(&f.host, "erase"),
+        f.store().release_erased_journal_body(&f.host),
+        f.store().journal_predecessor_session(&writer),
+        f.store()
+            .journal_body_is_unpublished(&f.host.subject_id, "runtime", "worker"),
+        f.store()
+            .journal_worker_was_released(&f.host.subject_id, "runtime", "worker"),
+        f.store().journal_writer_active(&writer),
+        f.store()
+            .journal_session_writer_matches(&writer, "source-session"),
+        f.store()
+            .claim_journal_writer(&f.host.subject_id, "runtime", "worker"),
+        f.store()
+            .bind_journal_session(&writer, f.host.attribution.clone().unwrap()),
+        f.store().release_journal_writer(&writer),
+        f.store().accept_journal_sources(&f.host, "late", &f.ranges),
+        f.store()
+            .mark_journal_sources_unavailable(&f.host, &f.journal_id, &f.ranges),
+        f.store()
+            .mark_journal_sources_available(&f.host, &f.journal_id, &f.ranges),
+        f.store().active_journal_generation(&f.host, &f.journal_id),
+        f.store().prepare_journal_generation(
+            &f.host,
+            &f.journal_id,
+            generation.job.clone(),
+            f.ranges.clone()
+        ),
+        f.store()
+            .close_journal_generation(&f.host, &generation.id, &generation.job),
+        f.store().read_journal_generation(&f.host, &generation.id),
+        f.store().journal_resume_state(&f.host, &f.journal_id),
+        f.store().execute_journal(&ctx, operation.clone()),
+        JournalJobContext::validated_recovery(
+            f.store(),
+            &f.host,
+            &generation.id,
+            generation.job.clone()
+        ),
+        service::attest_input_delivery(f.store(), &ctx, &digest, &f.ranges),
+        service::finish(f.store(), &ctx),
+        service::execute_snapshot(f.store(), &ctx, &digest, Request::ReadState),
+        service::execute_snapshot(
+            f.store(),
+            &ctx,
+            &digest,
+            Request::QueryOperation {
+                request_id: "saved".into()
+            }
+        ),
+        service::execute_snapshot(
+            f.store(),
+            &ctx,
+            &digest,
+            Request::ReadText {
+                read: JournalTextRead {
+                    target: JournalTextTarget::Position {
+                        snapshot: JournalSnapshot::Initial
+                    },
+                    offset: 0,
+                    limit: 8,
+                    content_token: None
+                }
+            }
+        ),
+    );
+    // Failed purge and restart must not revive any cached context or exact receipt.
+    f.sql("CREATE TRIGGER injected_subject_purge_failure BEFORE DELETE ON subjects BEGIN SELECT RAISE(ABORT,'injected'); END;").unwrap();
+    assert!(
+        f.store()
+            .finish_subject_deletion(&f.host.subject_id, "delete")
+            .is_err()
+    );
+    f.reopen();
+    subject_deleted(f.store().execute_journal(&ctx, operation));
+    f.sql("DROP TRIGGER injected_subject_purge_failure;")
+        .unwrap();
+    f.store()
+        .finish_subject_deletion(&f.host.subject_id, "delete")
+        .unwrap();
+    f.store()
+        .database
+        .try_with_connection::<_, JournalError>(|tx| {
+            for table in [
+                "journals",
+                "journal_entries",
+                "journal_corrections",
+                "journal_sources",
+                "journal_generations",
+                "journal_operations",
+                "journal_generation_deliveries",
+                "journal_generation_input_deliveries",
+                "journal_writer_bindings",
+                "journal_session_bindings",
+            ] {
+                assert_eq!(
+                    tx.query_row(&format!("SELECT COUNT(*) FROM {table}"), [], |r| r
+                        .get::<_, i64>(0))?,
+                    0,
+                    "{table}"
+                );
+            }
+            Ok(())
+        })
+        .unwrap();
+}
+
+#[test]
+fn subject_deletion_during_capture_rejects_even_empty_delayed_input() {
+    use session_store::capture::CaptureDto;
+    let f = Fixture::new();
+    let result = recording::JournalInput::build(f.store(), &f.host, &f.journal_id, |_, _, _| {
+        f.store()
+            .begin_subject_deletion(&f.host.subject_id, "delete")?;
+        Ok(CaptureDto {
+            version: 1,
+            session_id: "source-session".into(),
+            segment_id: "segment".into(),
+            view_entry_count: 0,
+            entries: vec![],
+        })
+    });
+    subject_deleted(result);
+}
+
+#[test]
+fn subject_deletion_during_source_callback_cannot_return_or_attest_cached_material() {
+    use transport::{JournalJobRequest as Request, JournalTextRead, JournalTextTarget};
+    let f = Fixture::new();
+    let (_, ctx) = f.generation("delayed-source", f.ranges.clone());
+    let result = service::execute_bounded(
+        f.store(),
+        &ctx,
+        Request::ReadText {
+            read: JournalTextRead {
+                target: JournalTextTarget::Source {
+                    pointer: f.ranges[0].source.pointer.clone(),
+                },
+                offset: 0,
+                limit: 8,
+                content_token: None,
+            },
+        },
+        |source, start, _| {
+            f.store()
+                .begin_subject_deletion(&f.host.subject_id, "delete")?;
+            Ok(recording::JournalMaterial {
+                range: JournalSourceRange {
+                    source: source.clone(),
+                    bytes: JournalByteRange {
+                        start,
+                        end: start + 8,
+                    },
+                },
+                text: "private!".into(),
+            })
+        },
+    );
+    subject_deleted(result);
+    f.store()
+        .database
+        .try_with_connection::<_, JournalError>(|tx| {
+            assert_eq!(
+                tx.query_row(
+                    "SELECT COUNT(*) FROM journal_generation_deliveries",
+                    [],
+                    |r| r.get::<_, i64>(0)
+                )?,
+                0
+            );
+            Ok(())
+        })
+        .unwrap();
+}

crates/subjektiv/src/lib.rs

@@ -1,7 +1,9 @@
 #![doc = include_str!("../README.md")]
 
 pub mod api;
+pub mod deletion;
 pub mod job;
+pub use deletion::{DeletionSubjectJob, SubjectDeletion};
 pub mod journal;
 mod legacy_migrations;
 pub mod permissions;
@@ -51,7 +53,9 @@ pub enum SubjektivError {
     InvalidRecord(String),
     #[error("subject `{0}` was not found in this Workspace")]
     SubjectNotFound(String),
-    #[error("subject `{0}` is retired")]
+    #[error("Subject deletion request `{0}` conflicts with a saved deletion")]
+    SubjectDeletionConflict(String),
+    #[error("subject `{0}` is legacy-retired")]
     SubjectRetired(String),
     #[error("the selected Worker Profile does not enable subjektiv")]
     ProfileDisabled,
@@ -146,7 +150,10 @@ impl<'de> Deserialize<'de> for SubjectRole {
 #[serde(rename_all = "snake_case")]
 pub enum SubjectState {
     Active,
-    Retired,
+    /// Saved pre-deletion lifecycle state. The old `retired` spelling remains readable
+    /// and serializable solely to preserve existing data; no retirement operation exists.
+    #[serde(rename = "retired")]
+    LegacyRetired,
 }
 
 #[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
@@ -644,6 +651,11 @@ static MIGRATIONS: &[FeatureMigration] = &[
         "bind Journal generation delivery to immutable Job input digest",
         journal::service::migrate_input_delivery,
     ),
+    FeatureMigration::new(
+        14,
+        "add permanent Subject deletion fences and explicit erasure",
+        deletion::migrate,
+    ),
 ];
 
 pub const REGISTRATION: FeatureRegistration =
@@ -772,6 +784,9 @@ impl SubjektivStore {
 
     pub fn subject(&self, subject_id: &str) -> Result<Option<SubjectRecord>> {
         self.database.try_with_connection(|connection| {
+            if deletion::is_deleting(connection, subject_id)? {
+                return Ok(None);
+            }
             let raw = connection
                 .query_row(
                     "SELECT record_json FROM subjects WHERE subject_id = ?1",
@@ -862,11 +877,13 @@ impl SubjektivStore {
         self.database.try_with_connection(|connection| {
             let sql = if after.is_some() {
                 "SELECT record_json FROM subjects
-                 WHERE created_at > ?1 OR (created_at = ?1 AND subject_id > ?2)
+                 WHERE NOT EXISTS (SELECT 1 FROM subject_deletions d WHERE d.subject_id=subjects.subject_id)
+                   AND (created_at > ?1 OR (created_at = ?1 AND subject_id > ?2))
                  ORDER BY created_at ASC, subject_id ASC
                  LIMIT ?3"
             } else {
                 "SELECT record_json FROM subjects
+                 WHERE NOT EXISTS (SELECT 1 FROM subject_deletions d WHERE d.subject_id=subjects.subject_id)
                  ORDER BY created_at ASC, subject_id ASC
                  LIMIT ?1"
             };
@@ -895,27 +912,6 @@ impl SubjektivStore {
         })
     }
 
-    /// Retires a Subject independently of stopping Workers. Memory/history remain unedited, undeleted, and readable.
-    /// Retirement is irreversible; new candidates and Memory changes require an active Subject.
-    pub fn retire_subject(&self, subject_id: &str) -> Result<SubjectRecord> {
-        self.database.try_transaction(|transaction| {
-            let mut subject = require_subject(transaction, subject_id)?;
-            if subject.state == SubjectState::Retired {
-                return Ok(subject);
-            }
-            subject.state = SubjectState::Retired;
-            subject.updated_at = now();
-            let raw = serde_json::to_string(&subject)?;
-            transaction.execute(
-                "UPDATE subjects
-                 SET state = 'retired', record_json = ?2, updated_at = ?3
-                 WHERE subject_id = ?1",
-                params![subject_id, raw, subject.updated_at],
-            )?;
-            Ok(subject)
-        })
-    }
-
     /// Saves an immutable candidate without changing committed Memory.
     /// Replay with the same candidate identity and payload returns the original record; different content conflicts.
     /// Extraction failure after saving never revokes the candidate. The Host commits the extraction pointer separately.
@@ -1003,6 +999,10 @@ impl SubjektivStore {
     ) -> Result<Option<SubjectSessionAttribution>> {
         validate_label("session id", session_id)?;
         self.database.try_with_connection(|connection| {
+            if let Some(subject) = deletion::deleted_session_subject(connection, session_id)? {
+                return Err(SubjektivError::SubjectNotFound(subject));
+            }
+
             let raw = connection
                 .query_row(
                     "SELECT record_json FROM subject_session_attributions
@@ -1011,7 +1011,12 @@ impl SubjektivStore {
                     |row| row.get::<_, String>(0),
                 )
                 .optional()?;
-            raw.map(|raw| parse_session_attribution(&raw)).transpose()
+            raw.map(|raw| {
+                let record = parse_session_attribution(&raw)?;
+                deletion::require_not_deleting(connection, &record.subject_id)?;
+                Ok(record)
+            })
+            .transpose()
         })
     }
 
@@ -1021,6 +1026,7 @@ impl SubjektivStore {
     ) -> Result<Vec<SubjectSessionAttribution>> {
         validate_label("subject id", subject_id)?;
         self.database.try_with_connection(|connection| {
+            require_subject_in_connection(connection, subject_id)?;
             let mut statement = connection.prepare(
                 "SELECT record_json FROM subject_session_attributions
                  WHERE subject_id = ?1
@@ -1062,6 +1068,7 @@ impl SubjektivStore {
         }
         let query_limit = limit.saturating_add(1);
         self.database.try_with_connection(|connection| {
+            require_subject_in_connection(connection, subject_id)?;
             let raw = match (session_id, after) {
                 (Some(session_id), _) => {
                     let mut statement = connection.prepare(
@@ -1128,6 +1135,7 @@ impl SubjektivStore {
         candidate_id: &str,
     ) -> Result<Option<SubjectStagingRecord>> {
         self.database.try_with_connection(|connection| {
+            deletion::require_not_deleting(connection, subject_id)?;
             let raw = connection
                 .query_row(
                     "SELECT record_json FROM staging_records
@@ -1292,6 +1300,7 @@ impl SubjektivStore {
         validate_nonempty("resolution reason", &request.reason)?;
         let request_raw = serde_json::to_string(&request)?;
         self.database.try_transaction(|transaction| {
+            deletion::require_not_deleting(transaction, subject_id)?;
             if let Some((stored_request, stored_receipt)) = transaction
                 .query_row(
                     "SELECT request_json, receipt_json
@@ -1426,6 +1435,7 @@ impl SubjektivStore {
         candidate_id: &str,
     ) -> Result<Option<StagingResolution>> {
         self.database.try_with_connection(|connection| {
+            deletion::require_not_deleting(connection, subject_id)?;
             let raw = connection
                 .query_row(
                     "SELECT resolution_json FROM staging_resolutions
@@ -1440,6 +1450,7 @@ impl SubjektivStore {
 
     pub fn memory(&self, subject_id: &str, memory_id: &str) -> Result<Option<MemoryRecord>> {
         self.database.try_with_connection(|connection| {
+            deletion::require_not_deleting(connection, subject_id)?;
             let raw = connection
                 .query_row(
                     "SELECT record_json FROM memory_records
@@ -1459,6 +1470,7 @@ impl SubjektivStore {
         change_id: String,
     ) -> Result<Option<MemoryRecord>> {
         self.database.try_with_connection(|connection| {
+            deletion::require_not_deleting(connection, subject_id)?;
             let raw = connection
                 .query_row(
                     "SELECT record_json FROM memory_changes
@@ -1854,6 +1866,7 @@ impl SubjektivStore {
         snapshot_id: &str,
     ) -> Result<Option<SurfaceSnapshot>> {
         self.database.try_with_connection(|connection| {
+            deletion::require_not_deleting(connection, subject_id)?;
             let raw = connection
                 .query_row(
                     "SELECT snapshot_json FROM surface_snapshots
@@ -2427,6 +2440,11 @@ fn write_session_attribution(
     record: SubjectSessionAttribution,
     raw: String,
 ) -> Result<SubjectSessionAttribution> {
+    deletion::require_live_worker(transaction, &record.runtime_id, &record.worker_id)?;
+    if let Some(subject) = deletion::deleted_session_subject(transaction, &record.session_id)? {
+        return Err(SubjektivError::SubjectNotFound(subject));
+    }
+
     let existing = transaction
         .query_row(
             "SELECT record_json FROM subject_session_attributions WHERE session_id = ?1",
@@ -2621,6 +2639,7 @@ fn require_subject_in_connection(
     connection: &rusqlite::Connection,
     subject_id: &str,
 ) -> Result<SubjectRecord> {
+    deletion::require_not_deleting(connection, subject_id)?;
     let raw = connection
         .query_row(
             "SELECT record_json FROM subjects WHERE subject_id = ?1",
@@ -2637,7 +2656,7 @@ fn require_active_subject(
     subject_id: &str,
 ) -> Result<SubjectRecord> {
     let subject = require_subject(transaction, subject_id)?;
-    if subject.state == SubjectState::Retired {
+    if subject.state == SubjectState::LegacyRetired {
         return Err(SubjektivError::SubjectRetired(subject_id.to_string()));
     }
     Ok(subject)
@@ -3278,6 +3297,7 @@ fn require_job_generation(
     job_id: &str,
     attempt_id: &str,
 ) -> Result<String> {
+    deletion::require_not_deleting(connection, subject_id)?;
     let change_id: Option<String> = connection.query_row(
         "SELECT memory_fingerprint FROM surface_generation_runs WHERE subject_id = ?1 AND generation_id = ?2 AND job_id = ?3 AND attempt_id = ?4",
         params![subject_id, generation_id, job_id, attempt_id], |row| row.get(0),
@@ -3370,6 +3390,21 @@ mod tests {
     use super::*;
     use feature_storage::FeatureStorage;
 
+    /// Builds saved pre-deletion lifecycle data; not a current product operation.
+    pub(crate) fn legacy_retired_fixture(
+        store: &SubjektivStore,
+        subject_id: &str,
+    ) -> Result<SubjectRecord> {
+        store.database.try_transaction(|tx| {
+            let mut subject = require_subject(tx, subject_id)?;
+            subject.state = SubjectState::LegacyRetired;
+            subject.updated_at = now();
+            tx.execute("UPDATE subjects SET state='retired',record_json=?2,updated_at=?3 WHERE subject_id=?1",
+                params![subject_id,serde_json::to_string(&subject)?,subject.updated_at])?;
+            Ok(subject)
+        })
+    }
+
     pub(super) fn role() -> SubjectRole {
         SubjectRole::new("workspace_companion").unwrap()
     }
@@ -5047,8 +5082,8 @@ mod tests {
             Err(SubjektivError::InvalidStateTransition { .. })
         ));
 
-        let retired = store.retire_subject(&subject.id).unwrap();
-        assert_eq!(retired.state, SubjectState::Retired);
+        let retired = crate::tests::legacy_retired_fixture(&store, &subject.id).unwrap();
+        assert_eq!(retired.state, SubjectState::LegacyRetired);
         assert!(matches!(
             store.create_memory(&subject.id, draft("after retirement", "invalid")),
             Err(SubjektivError::SubjectRetired(_))

crates/subjektiv/src/permissions.rs

@@ -94,6 +94,10 @@ impl SubjektivStore {
     pub fn bind_worker_execution_grant(&self, grant: &WorkerExecutionGrant) -> Result<()> {
         validate_grant(self.scope_id(), grant)?;
         self.database.try_transaction(|tx| {
+            require_subject(tx, &grant.subject_id)?;
+            for (runtime, worker) in [(&grant.runtime_id, &grant.worker_id), (&grant.origin_runtime_id, &grant.origin_worker_id)] {
+                if tx.query_row("SELECT EXISTS(SELECT 1 FROM subject_deleted_workers WHERE runtime_id=?1 AND worker_id=?2)", params![runtime,worker], |r|r.get::<_,bool>(0))? { return Err(denied("Worker belongs to a deleted Subject")); }
+            }
             if let Some(existing) = grant_in_connection(tx, &grant.runtime_id, &grant.worker_id)? {
                 return if existing == *grant { Ok(()) } else {
                     Err(SubjektivError::WorkerExecutionGrantConflict(format!("{}/{}", grant.runtime_id, grant.worker_id)))
@@ -184,9 +188,12 @@ fn grant_in_connection(
     runtime: &str,
     worker: &str,
 ) -> Result<Option<WorkerExecutionGrant>> {
+    // Absence must never become non-Subject fallback authority after purge.
+    deletion::require_live_worker(connection, runtime, worker)?;
+
     let raw: Option<String> = connection
         .query_row(
-            "SELECT record_json FROM worker_execution_grants WHERE runtime_id=?1 AND worker_id=?2",
+            "SELECT record_json FROM worker_execution_grants WHERE runtime_id=?1 AND worker_id=?2 AND NOT EXISTS(SELECT 1 FROM subject_deletions d WHERE d.subject_id=worker_execution_grants.subject_id)",
             params![runtime, worker],
             |row| row.get(0),
         )

crates/subjektiv/src/permissions/tests.rs

@@ -315,7 +315,7 @@ fn redelegation_requires_current_source_and_explicit_retained_parent_ceiling() {
         store.worker_execution_grant("runtime", "child").unwrap(),
         Some(child)
     );
-    store.retire_subject(&subject).unwrap();
+    crate::tests::legacy_retired_fixture(&store, &subject).unwrap();
     stale.source_change_id = revoked.change_id;
     assert!(store.bind_worker_execution_grant(&stale).is_err());
 }
@@ -582,7 +582,7 @@ fn subject_grant_listing_is_scoped_retained_ordered_and_fails_on_overflow() {
             &update("revoke", Some(&source.change_id), Vec::new()),
         )
         .unwrap();
-    store.retire_subject(&subject).unwrap();
+    crate::tests::legacy_retired_fixture(&store, &subject).unwrap();
     let listed = store
         .list_subject_worker_execution_grants(&subject)
         .unwrap();
@@ -654,3 +654,51 @@ fn failed_schema_migration_rolls_back_new_tables_and_preserves_old_data() {
         Ok(())
     }).unwrap();
 }
+
+#[test]
+fn deletion_fences_source_and_child_grant_replays_and_never_falls_back_after_purge() {
+    let temp = tempfile::tempdir().unwrap();
+    let (_manager, _scope, store) = open_store(temp.path(), "workspace-a");
+    let subject = store.create_subject(role()).unwrap().id;
+    let replacement = update("allow", None, vec![permission("file.read", ".", true)]);
+    let source = store
+        .set_subject_permissions(&subject, &replacement)
+        .unwrap();
+    let child = grant(&subject, &source.change_id, "child");
+    store.bind_worker_execution_grant(&child).unwrap();
+    store.begin_subject_deletion(&subject, "delete").unwrap();
+    assert!(store.subject_permissions(&subject).is_err());
+    assert!(
+        store
+            .set_subject_permissions(&subject, &replacement)
+            .is_err()
+    );
+    assert!(store.bind_worker_execution_grant(&child).is_err());
+    assert!(store.worker_execution_grant("runtime", "child").is_err());
+    assert!(store.worker_subject_deleted("runtime", "body").unwrap());
+    assert!(store.worker_subject_deleted("runtime", "child").unwrap());
+    assert_eq!(store.deletion_subject_workers(&subject).unwrap().len(), 2);
+    store.finish_subject_deletion(&subject, "delete").unwrap();
+    assert!(store.worker_execution_grant("runtime", "child").is_err());
+    assert!(store.worker_execution_grant("runtime", "body").is_err());
+    assert!(
+        store
+            .worker_execution_grant("runtime", "unrelated")
+            .unwrap()
+            .is_none()
+    );
+    let fresh = store.create_subject(role()).unwrap().id;
+    assert!(store.subject_permissions(&fresh).unwrap().is_none());
+    assert!(
+        store
+            .record_session_attribution(
+                SubjectSessionAttribution::new(&fresh, "runtime", "child", "new-session").unwrap()
+            )
+            .is_err()
+    );
+    assert!(
+        store
+            .claim_journal_writer(&fresh, "runtime", "body")
+            .is_err()
+    );
+}

crates/worker-runtime/src/execution.rs

@@ -727,6 +727,23 @@ pub trait WorkerExecutionBackend: Send + Sync + 'static {
         Err("execution backend cannot confirm Subject create execution absence".into())
     }
 
+    /// Read-only exact execution identity check before Runtime persists exclusion.
+    fn preflight_subject_delete_worker(
+        &self,
+        _request: &runtime_api::SubjectDeleteWorkerRequest,
+    ) -> Result<(), String> {
+        Err("execution backend cannot validate Subject Worker identity".into())
+    }
+
+    /// Runtime has durably fenced admission. Confirm shutdown and discard all
+    /// execution candidates under the backend Worker lock; uncertainty must fail.
+    fn subject_delete_worker(
+        &self,
+        _request: &runtime_api::SubjectDeleteWorkerRequest,
+    ) -> Result<(), String> {
+        Err("execution backend cannot confirm Subject Worker shutdown".into())
+    }
+
     /// Must reserve the actual Controller, not infer Idle from a catalog snapshot.
     fn subject_release(
         &self,
@@ -1069,6 +1086,20 @@ impl WorkerExecutionBackendRef {
         self.backend.recover_subject_create(request)
     }
 
+    pub(crate) fn preflight_subject_delete_worker(
+        &self,
+        request: &runtime_api::SubjectDeleteWorkerRequest,
+    ) -> Result<(), String> {
+        self.backend.preflight_subject_delete_worker(request)
+    }
+
+    pub(crate) fn subject_delete_worker(
+        &self,
+        request: &runtime_api::SubjectDeleteWorkerRequest,
+    ) -> Result<(), String> {
+        self.backend.subject_delete_worker(request)
+    }
+
     pub(crate) fn subject_release(
         &self,
         request: &runtime_api::SubjectReleaseRequest,

crates/worker-runtime/src/fs_store.rs

@@ -43,7 +43,8 @@ use std::sync::atomic::{AtomicU8, AtomicU64, Ordering};
 #[path = "test_support.rs"]
 pub mod test_support;
 
-pub(crate) const SCHEMA_VERSION: u32 = 14;
+pub(crate) const SCHEMA_VERSION: u32 = 15;
+const RESTORE_REPAIR_SCHEMA_VERSION: u32 = 14;
 const RESTORE_DECISION_SCHEMA_VERSION: u32 = 13;
 const RESTORE_ADMISSION_SCHEMA_VERSION: u32 = 12;
 // Frozen source schemas: do not move their meaning when adding a migration.
@@ -560,6 +561,22 @@ impl FsRuntimeStore {
         self.root.join(RUNTIME_FILE)
     }
 
+    pub(crate) fn worker_originals_absent(
+        &self,
+        worker_id: WorkerId,
+    ) -> Result<bool, RuntimeError> {
+        let path = self.worker_dir(&worker_id);
+        match fs::symlink_metadata(&path) {
+            Ok(_) => Ok(false),
+            Err(error) if error.kind() == std::io::ErrorKind::NotFound => Ok(true),
+            Err(source) => Err(RuntimeError::StoreIo {
+                operation: "confirm Subject Worker original absence",
+                path,
+                source,
+            }),
+        }
+    }
+
     fn worker_dir(&self, worker_id: &WorkerId) -> PathBuf {
         self.root.join(WORKERS_DIR).join(worker_id.to_string())
     }
@@ -659,6 +676,8 @@ pub(crate) struct OpenedFsRuntimeStore {
 
 #[derive(Clone, Debug)]
 pub(crate) struct PersistedRuntimeState {
+    pub(crate) subject_delete_worker_fences:
+        BTreeMap<WorkerId, crate::runtime::SubjectDeleteWorkerFence>,
     pub(crate) subject_create_recovery_fences:
         BTreeMap<WorkerId, crate::runtime::SubjectCreateRecoveryFence>,
     pub(crate) subject_releases: Vec<(
@@ -876,11 +895,12 @@ fn plan_runtime_store_migration(
             | SOURCE_SCHEMA_VERSION
             | RESTORE_ADMISSION_SCHEMA_VERSION
             | RESTORE_DECISION_SCHEMA_VERSION
+            | RESTORE_REPAIR_SCHEMA_VERSION
     ) {
         return Err(runtime_store_corrupt(
             &runtime_path,
             format!(
-                "unsupported Runtime store schema version {schema_version}; expected {OLDEST_SCHEMA_VERSION}, {LEGACY_SCHEMA_VERSION}, {PREVIOUS_SCHEMA_VERSION}, {AGGREGATE_SCHEMA_VERSION}, {EXECUTION_SCHEMA_VERSION}, {SOURCE_SCHEMA_VERSION}, {RESTORE_ADMISSION_SCHEMA_VERSION}, {RESTORE_DECISION_SCHEMA_VERSION}, or {SCHEMA_VERSION}"
+                "unsupported Runtime store schema version {schema_version}; expected {OLDEST_SCHEMA_VERSION}, {LEGACY_SCHEMA_VERSION}, {PREVIOUS_SCHEMA_VERSION}, {AGGREGATE_SCHEMA_VERSION}, {EXECUTION_SCHEMA_VERSION}, {SOURCE_SCHEMA_VERSION}, {RESTORE_ADMISSION_SCHEMA_VERSION}, {RESTORE_DECISION_SCHEMA_VERSION}, {RESTORE_REPAIR_SCHEMA_VERSION}, or {SCHEMA_VERSION}"
             ),
         ));
     }
@@ -1216,6 +1236,7 @@ fn migrate_worker_record(
             | SOURCE_SCHEMA_VERSION
             | RESTORE_ADMISSION_SCHEMA_VERSION
             | RESTORE_DECISION_SCHEMA_VERSION
+            | RESTORE_REPAIR_SCHEMA_VERSION
     ) {
         // Admission identity survives migration. Older pending records did not
         // distinguish a committed decision from preparation or failed cleanup.
@@ -1229,10 +1250,12 @@ fn migrate_worker_record(
                 "Worker schema does not match Runtime migration source".into(),
             ));
         }
-        if source_schema_version != RESTORE_DECISION_SCHEMA_VERSION {
+        if source_schema_version < RESTORE_DECISION_SCHEMA_VERSION {
             migrate_restore_commit_fact(&mut identity_document, identity_path)?;
         }
-        migrate_restore_repair_fact(&mut identity_document, identity_path)?;
+        if source_schema_version < RESTORE_REPAIR_SCHEMA_VERSION {
+            migrate_restore_repair_fact(&mut identity_document, identity_path)?;
+        }
         identity_document["schema_version"] = serde_json::Value::from(SCHEMA_VERSION);
         let aggregate: WorkerAggregateRecord = serde_json::from_value(identity_document)
             .map_err(|error| runtime_store_corrupt(identity_path, error.to_string()))?;
@@ -1691,6 +1714,9 @@ fn migrate_runtime_document(
         "schema_version".to_string(),
         serde_json::Value::from(SCHEMA_VERSION),
     );
+    object
+        .entry("subject_delete_worker_fences")
+        .or_insert_with(|| serde_json::json!({}));
     // Intermediate schema-11 writers may already have saved irreversible fences.
     // Default only a missing field; malformed or existing fences must not be erased.
     object
@@ -1698,7 +1724,10 @@ fn migrate_runtime_document(
         .or_insert_with(|| serde_json::json!({}));
     if !matches!(
         source_schema_version,
-        SOURCE_SCHEMA_VERSION | RESTORE_ADMISSION_SCHEMA_VERSION | RESTORE_DECISION_SCHEMA_VERSION
+        SOURCE_SCHEMA_VERSION
+            | RESTORE_ADMISSION_SCHEMA_VERSION
+            | RESTORE_DECISION_SCHEMA_VERSION
+            | RESTORE_REPAIR_SCHEMA_VERSION
     ) {
         object.remove("workers");
         // This legacy cache is not Runtime lifecycle or restore authority. Bundles
@@ -2249,6 +2278,7 @@ fn migrate_runtime_store_in_place(
                 SOURCE_SCHEMA_VERSION
                     | RESTORE_ADMISSION_SCHEMA_VERSION
                     | RESTORE_DECISION_SCHEMA_VERSION
+                    | RESTORE_REPAIR_SCHEMA_VERSION
             )
         {
             atomic_write_json(
@@ -2288,6 +2318,7 @@ fn migrate_runtime_store_in_place(
 
 #[derive(Clone, Debug, Serialize, Deserialize)]
 struct RuntimeSnapshot {
+    subject_delete_worker_fences: BTreeMap<WorkerId, crate::runtime::SubjectDeleteWorkerFence>,
     #[serde(default)]
     subject_create_recovery_fences: BTreeMap<WorkerId, crate::runtime::SubjectCreateRecoveryFence>,
     #[serde(default)]
@@ -2326,6 +2357,7 @@ fn record_worker_load_diagnostic(
 impl RuntimeSnapshot {
     fn from_persisted(state: &PersistedRuntimeState) -> Self {
         Self {
+            subject_delete_worker_fences: state.subject_delete_worker_fences.clone(),
             subject_create_recovery_fences: state.subject_create_recovery_fences.clone(),
             subject_releases: state.subject_releases.clone(),
             schema_version: SCHEMA_VERSION,
@@ -2350,6 +2382,33 @@ impl RuntimeSnapshot {
                 ),
             });
         }
+        for (worker_id, fence) in &self.subject_delete_worker_fences {
+            let request = &fence.request;
+            let response_matches = fence.response.as_ref().is_none_or(|response| {
+                response.worker_id == request.worker_id
+                    && response.workspace_id == request.workspace_id
+                    && response.create_fingerprint == request.create_fingerprint
+                    && response.operation_id == request.operation_id
+            });
+            if *worker_id != request.worker_id
+                || request.workspace_id.trim().is_empty()
+                || request.create_fingerprint.trim().is_empty()
+                || request.create_fingerprint.len() > 512
+                || request.operation_id.trim().is_empty()
+                || request.operation_id.len() > 512
+                || self
+                    .workspace_owners
+                    .get(&request.workspace_id)
+                    .is_none_or(|owner| owner.trim().is_empty())
+                || !response_matches
+            {
+                return Err(RuntimeError::StoreCorrupt {
+                    operation: "read Subject delete Worker fence",
+                    path: path.to_path_buf(),
+                    message: "invalid deletion identity, receipt or Workspace owner".into(),
+                });
+            }
+        }
         for (worker_id, fence) in &self.subject_create_recovery_fences {
             let request = &fence.request;
             let response_matches = fence.response.as_ref().is_none_or(|response| {
@@ -2392,6 +2451,7 @@ impl RuntimeSnapshot {
         workers: BTreeMap<WorkerId, PersistedWorkerRecord>,
     ) -> PersistedRuntimeState {
         PersistedRuntimeState {
+            subject_delete_worker_fences: self.subject_delete_worker_fences,
             subject_create_recovery_fences: self.subject_create_recovery_fences,
             subject_releases: self.subject_releases,
             display_name: self.display_name,
@@ -3218,8 +3278,7 @@ mod tests {
             assert_eq!(fs::read(&worker_path).unwrap(), worker_before);
             // The direct reader still rejects a previous schema: migration is
             // explicit, not permissive deserialization of a newer format.
-            let snapshot: RuntimeSnapshot = serde_json::from_value(runtime.clone()).unwrap();
-            assert!(snapshot.validate(&runtime_path).is_err());
+            assert!(serde_json::from_value::<RuntimeSnapshot>(runtime.clone()).is_err());
 
             let opened = FsRuntimeStore::open_or_create(root.clone(), "runtime-test").unwrap();
             let state = opened.state.as_ref().unwrap();
@@ -3231,6 +3290,7 @@ mod tests {
                 expected_worker
             );
             runtime["schema_version"] = serde_json::json!(SCHEMA_VERSION);
+            runtime["subject_delete_worker_fences"] = serde_json::json!({});
             if fence_state == "absent" {
                 runtime["subject_create_recovery_fences"] = serde_json::json!({});
             }
@@ -4072,6 +4132,8 @@ mod tests {
         );
     }
 
+    include!("subject_delete_store_tests.rs");
+
     fn canonical_worker_store() -> (
         tempfile::TempDir,
         FsRuntimeStore,

crates/worker-runtime/src/http_server.rs

@@ -2102,7 +2102,11 @@ fn required_runtime_permission(method: &Method, path: &str) -> Option<&'static s
     {
         return Some("workers:input");
     }
-    if path == "/v1/subject-create-recovery" && *method == Method::POST {
+    if matches!(
+        path,
+        "/v1/subject-create-recovery" | "/v1/subject-delete-worker"
+    ) && *method == Method::POST
+    {
         return Some("workers:delete");
     }
     if path.ends_with("/stop")
@@ -3332,6 +3336,18 @@ mod tests {
     struct AcceptingBackend;
 
     impl WorkerExecutionBackend for AcceptingBackend {
+        fn preflight_subject_delete_worker(
+            &self,
+            _request: &runtime_api::SubjectDeleteWorkerRequest,
+        ) -> Result<(), String> {
+            Ok(())
+        }
+        fn subject_delete_worker(
+            &self,
+            _request: &runtime_api::SubjectDeleteWorkerRequest,
+        ) -> Result<(), String> {
+            Ok(())
+        }
         fn recover_subject_create(
             &self,
             _request: &runtime_api::SubjectCreateRecoveryRequest,

crates/worker-runtime/src/http_server/runtime_management_api.rs

@@ -406,6 +406,18 @@ impl runtime_api::RuntimeApi for RuntimeManagementApi {
         }
     }
 
+    async fn subject_delete_worker(
+        &self,
+        request: runtime_api::SubjectDeleteWorkerRequest,
+    ) -> Result<runtime_api::SubjectDeleteWorkerResponse, runtime_api::RuntimeApiError> {
+        let scope = material_scope(&self.state, &request.workspace_id)?;
+        self.state
+            .runtime
+            .subject_delete_worker_scoped(&scope, request)
+            .map_err(RuntimeHttpRestError::runtime)
+            .map_err(api_error)
+    }
+
     async fn recover_subject_create(
         &self,
         request: runtime_api::SubjectCreateRecoveryRequest,

crates/worker-runtime/src/http_server/tests/session_material_tests.rs

@@ -1222,6 +1222,54 @@ async fn subject_create_recovery_signed_http_requires_delete_and_matching_worksp
     }
 }
 
+#[tokio::test]
+async fn subject_delete_worker_signed_http_requires_delete_and_matching_workspace() {
+    let f = Fixture::new();
+    let identity = RuntimeIdentityMaterial::generate("recovery-key").unwrap();
+    let trust = workspace_trust(&identity);
+    let app = runtime_http_router_with_workspace_auth(
+        f.runtime.clone(),
+        None,
+        workspace_test_auth(vec![trust.clone()]),
+    );
+    let path = "/v1/subject-delete-worker";
+    let mut request = runtime_api::SubjectDeleteWorkerRequest {
+        workspace_id: f.scope.workspace_id.clone(),
+        worker_id: WorkerId::now_v7(),
+        create_fingerprint: "unpublished-create".into(),
+        operation_id: "recovery-1".into(),
+    };
+    for operation in ["workers:read", "workers:stop", "workers:create"] {
+        let body = serde_json::to_vec(&request).unwrap();
+        let mut claims = signed_claims(&trust, "POST", path, &body);
+        claims.operation = operation.into();
+        let response = signed_request(app.clone(), &identity, &claims, body, "workspace-a").await;
+        assert_eq!(response.status(), StatusCode::UNAUTHORIZED);
+    }
+    request.workspace_id = "other-workspace".into();
+    let body = serde_json::to_vec(&request).unwrap();
+    let claims = signed_claims(&trust, "POST", path, &body);
+    let response = signed_request(app.clone(), &identity, &claims, body, "workspace-a").await;
+    assert_eq!(response.status(), StatusCode::FORBIDDEN);
+    request.workspace_id = f.scope.workspace_id.clone();
+    for _ in 0..2 {
+        let body = serde_json::to_vec(&request).unwrap();
+        let claims = signed_claims(&trust, "POST", path, &body);
+        assert_eq!(claims.operation, "workers:delete");
+        let response = signed_request(app.clone(), &identity, &claims, body, "workspace-a").await;
+        assert_eq!(response.status(), StatusCode::OK);
+        let bytes = axum::body::to_bytes(response.into_body(), 16384)
+            .await
+            .unwrap();
+        let receipt: runtime_api::SubjectDeleteWorkerResponse =
+            serde_json::from_slice(&bytes).unwrap();
+        assert_eq!(receipt.worker_id, request.worker_id);
+        assert_eq!(receipt.workspace_id, request.workspace_id);
+        assert_eq!(receipt.create_fingerprint, request.create_fingerprint);
+        assert_eq!(receipt.operation_id, request.operation_id);
+    }
+}
+
 #[tokio::test]
 async fn explicit_material_erasure_requires_delete_capability_and_matching_scope() {
     let f = Fixture::new();

crates/worker-runtime/src/retention/runtime_v5_tests.rs

@@ -97,7 +97,7 @@ fn runtime_fixture(root: &Path, schema: u32) -> (WorkerId, SessionId, SegmentId)
             "schema_version": schema, "display_name": "retained Runtime",
             "backend": "fs_store", "status": "running", "next_diagnostic_id": 1,
             "config_bundles": {}, "workspace_owners": {"workspace-a": "owner-a"},
-            "diagnostics": [], "subject_releases": [],
+            "diagnostics": [], "subject_releases": [], "subject_delete_worker_fences": {},
             "subject_create_recovery_fences": {fenced_worker.to_string(): {
                 "request": {"workspace_id": "workspace-a", "worker_id": fenced_worker,
                     "create_fingerprint": "retained-create", "operation_id": "retained-recovery"},

crates/worker-runtime/src/runtime.rs

@@ -1,3 +1,5 @@
+mod subject_delete;
+pub(crate) use subject_delete::SubjectDeleteWorkerFence;
 #[cfg(feature = "restore-checkpoints")]
 mod restore_checkpoint;
 mod restore_continuation;
@@ -5645,6 +5647,7 @@ struct RuntimeState {
     // Ephemeral write barrier, not authority: only canonical reread + sync can
     // release it. Prevents another mutation from persisting an older projection.
     unreconciled_worker_writes: std::collections::BTreeSet<WorkerId>,
+    subject_delete_worker_fences: BTreeMap<WorkerId, SubjectDeleteWorkerFence>,
     subject_create_recovery_fences: BTreeMap<WorkerId, SubjectCreateRecoveryFence>,
     subject_release_operations: BTreeMap<
         (WorkerId, String),
@@ -5686,6 +5689,7 @@ impl RuntimeState {
             next_diagnostic_id: 1,
             workers: BTreeMap::new(),
             unreconciled_worker_writes: Default::default(),
+            subject_delete_worker_fences: BTreeMap::new(),
             subject_create_recovery_fences: BTreeMap::new(),
             subject_release_operations: BTreeMap::new(),
             workdir_operations: BTreeMap::new(),
@@ -5722,6 +5726,7 @@ impl RuntimeState {
             next_diagnostic_id: 1,
             workers: BTreeMap::new(),
             unreconciled_worker_writes: Default::default(),
+            subject_delete_worker_fences: BTreeMap::new(),
             subject_create_recovery_fences: BTreeMap::new(),
             subject_release_operations: BTreeMap::new(),
             workdir_operations: BTreeMap::new(),
@@ -5773,6 +5778,7 @@ impl RuntimeState {
             next_diagnostic_id,
             workers,
             unreconciled_worker_writes: Default::default(),
+            subject_delete_worker_fences: persisted.subject_delete_worker_fences,
             subject_create_recovery_fences: persisted.subject_create_recovery_fences,
             subject_release_operations: persisted
                 .subject_releases
@@ -5804,6 +5810,7 @@ impl RuntimeState {
     #[cfg(feature = "fs-store")]
     fn persisted_state(&self) -> PersistedRuntimeState {
         PersistedRuntimeState {
+            subject_delete_worker_fences: self.subject_delete_worker_fences.clone(),
             subject_create_recovery_fences: self.subject_create_recovery_fences.clone(),
             subject_releases: self.subject_release_operations.values().cloned().collect(),
             display_name: self.display_name.clone(),
@@ -6027,7 +6034,9 @@ impl RuntimeState {
     }
 
     fn ensure_subject_create_not_fenced(&self, worker_id: WorkerId) -> Result<(), RuntimeError> {
-        if self.subject_create_recovery_fences.contains_key(&worker_id) {
+        if self.subject_create_recovery_fences.contains_key(&worker_id)
+            || self.subject_delete_worker_fences.contains_key(&worker_id)
+        {
             return Err(RuntimeError::InvalidRequest(
                 "Subject create identity is irreversibly fenced".into(),
             ));
@@ -6040,6 +6049,14 @@ impl RuntimeState {
         worker: &WorkerRef,
         allow_disconnected: bool,
     ) -> Result<(), RuntimeError> {
+        if allow_disconnected
+            && self
+                .subject_delete_worker_fences
+                .get(&worker.worker_id)
+                .is_some_and(|fence| fence.response.is_some())
+        {
+            return Ok(());
+        }
         self.ensure_subject_create_not_fenced(worker.worker_id)?;
         use runtime_api::SubjectReleaseState as State;
         if self
@@ -6110,6 +6127,13 @@ impl RuntimeState {
     }
 
     fn forget_workspace_owner_if_unused(&mut self, workspace_id: &str) -> bool {
+        if self
+            .subject_delete_worker_fences
+            .values()
+            .any(|fence| fence.request.workspace_id == workspace_id)
+        {
+            return false;
+        }
         if self
             .subject_create_recovery_fences
             .values()
@@ -8767,6 +8791,8 @@ mod tests {
 
     #[derive(Default)]
     struct TestExecutionBackend {
+        deletion_confirmed: AtomicBool,
+        deletion_checks: std::sync::atomic::AtomicUsize,
         recovery_absent: AtomicBool,
         recovery_checks: std::sync::atomic::AtomicUsize,
         spawn_result: Mutex<Option<WorkerExecutionSpawnResult>>,
@@ -8848,6 +8874,23 @@ mod tests {
     }
 
     impl WorkerExecutionBackend for TestExecutionBackend {
+        fn preflight_subject_delete_worker(
+            &self,
+            _request: &runtime_api::SubjectDeleteWorkerRequest,
+        ) -> Result<(), String> {
+            Ok(())
+        }
+        fn subject_delete_worker(
+            &self,
+            _request: &runtime_api::SubjectDeleteWorkerRequest,
+        ) -> Result<(), String> {
+            self.deletion_checks.fetch_add(1, Ordering::SeqCst);
+            if self.deletion_confirmed.load(Ordering::SeqCst) {
+                Ok(())
+            } else {
+                Err("shutdown is unconfirmed".into())
+            }
+        }
         fn recover_subject_create(
             &self,
             _request: &runtime_api::SubjectCreateRecoveryRequest,
@@ -14074,7 +14117,7 @@ mod tests {
         })
         .unwrap_err();
         assert!(error.to_string().contains(
-            "unsupported Runtime store schema version 2; expected 6, 7, 8, 9, 10, 11, 12, 13, or 14"
+            "unsupported Runtime store schema version 2; expected 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15"
         ));
 
         let _ = std::fs::remove_dir_all(root);
@@ -14259,6 +14302,8 @@ mod tests {
         let _ = std::fs::remove_dir_all(root);
     }
 
+    include!("runtime/subject_delete_tests.rs");
+
     #[cfg(feature = "fs-store")]
     #[test]
     fn subject_create_recovery_is_durable_exact_and_rechecks_absence() {

crates/worker-runtime/src/runtime/subject_delete.rs

@@ -0,0 +1,168 @@
+use super::*;
+
+/// Permanent exclusion survives WorkerRemoval. A receipt never substitutes for a
+/// fresh execution reconciliation on exact retry, including after Runtime reopen.
+#[derive(Clone, Debug, serde::Serialize, serde::Deserialize)]
+#[serde(deny_unknown_fields)]
+pub(crate) struct SubjectDeleteWorkerFence {
+    pub(crate) request: runtime_api::SubjectDeleteWorkerRequest,
+    pub(crate) response: Option<runtime_api::SubjectDeleteWorkerResponse>,
+}
+
+impl Runtime {
+    pub fn subject_delete_worker_scoped(
+        &self,
+        scope: &RuntimeWorkspaceScope,
+        request: runtime_api::SubjectDeleteWorkerRequest,
+    ) -> Result<runtime_api::SubjectDeleteWorkerResponse, RuntimeError> {
+        if request.workspace_id != scope.workspace_id
+            || request.create_fingerprint.trim().is_empty()
+            || request.operation_id.trim().is_empty()
+            || request.create_fingerprint.len() > 512
+            || request.operation_id.len() > 512
+        {
+            return Err(RuntimeError::InvalidRequest(
+                "invalid Subject delete Worker identity".into(),
+            ));
+        }
+        let lease = self.worker_operation_lock(request.worker_id)?;
+        let _operation = lease.lock().map_err(|_| RuntimeError::StatePoisoned)?;
+        let worker_ref = WorkerRef::new(request.worker_id);
+        let backend = {
+            let mut state = self.lock()?;
+            state.ensure_running()?;
+            if state.backend == RuntimeBackendKind::Memory {
+                return Err(RuntimeError::InvalidRequest(
+                    "Subject delete requires durable storage".into(),
+                ));
+            }
+            state.ensure_workspace_owner(scope, false)?;
+            if state.workers.contains_key(&request.worker_id) {
+                state.refresh_uncertain_worker_write(&worker_ref)?;
+                let worker = state.worker(&worker_ref)?;
+                if worker.workspace_id.as_deref() != Some(request.workspace_id.as_str())
+                    || worker.request.as_ref().is_none_or(|create| {
+                        create.create_fingerprint != request.create_fingerprint
+                    })
+                {
+                    return Err(RuntimeError::InvalidRequest(
+                        "Subject delete Worker identity mismatch".into(),
+                    ));
+                }
+            }
+            if let Some(recovery) = state.subject_create_recovery_fences.get(&request.worker_id)
+                && (recovery.request.workspace_id != request.workspace_id
+                    || recovery.request.create_fingerprint != request.create_fingerprint)
+            {
+                return Err(RuntimeError::InvalidRequest(
+                    "Subject recovery identity mismatch".into(),
+                ));
+            }
+            if state.subject_delete_worker_fences.values().any(|fence| {
+                fence.request.workspace_id == request.workspace_id
+                    && fence.request.operation_id == request.operation_id
+                    && fence.request.worker_id != request.worker_id
+            }) {
+                return Err(RuntimeError::InvalidRequest(
+                    "Subject delete operation reused for another Worker".into(),
+                ));
+            }
+            state.execution_backend.clone()
+        };
+        // Unpublished execution identity is checked without holding the catalog
+        // mutex. The Worker operation lock excludes Runtime create/restore.
+        if let Some(backend) = backend.as_ref() {
+            backend
+                .preflight_subject_delete_worker(&request)
+                .map_err(RuntimeError::InvalidRequest)?;
+        }
+        {
+            let mut state = self.lock()?;
+            state.ensure_workspace_owner(scope, false)?;
+            if state.subject_delete_worker_fences.values().any(|fence| {
+                fence.request.workspace_id == request.workspace_id
+                    && fence.request.operation_id == request.operation_id
+                    && fence.request.worker_id != request.worker_id
+            }) {
+                return Err(RuntimeError::InvalidRequest(
+                    "Subject delete operation reused for another Worker".into(),
+                ));
+            }
+            if let Some(saved) = state.subject_delete_worker_fences.get(&request.worker_id) {
+                if saved.request != request {
+                    return Err(RuntimeError::InvalidRequest(
+                        "different Subject delete Worker request retained".into(),
+                    ));
+                }
+            } else {
+                state.ensure_workspace_owner(scope, true)?;
+                state.subject_delete_worker_fences.insert(
+                    request.worker_id,
+                    SubjectDeleteWorkerFence {
+                        request: request.clone(),
+                        response: None,
+                    },
+                );
+            }
+            // Keep exclusion on persistence uncertainty; never start execution
+            // cleanup until this durable write has been confirmed.
+            state.persist_runtime_snapshot()?;
+        }
+        let backend = backend.ok_or_else(|| {
+            RuntimeError::InvalidRequest(
+                "Subject Worker shutdown cannot be confirmed without execution backend".into(),
+            )
+        })?;
+        backend
+            .subject_delete_worker(&request)
+            .map_err(RuntimeError::InvalidRequest)?;
+        let mut state = self.lock()?;
+        if let Some(mut worker) = state.workers.get(&request.worker_id).cloned() {
+            let restore_receipt =
+                RuntimeWorkerRestoreResult::superseded_by_stop(worker.pending_restore);
+            worker.pending_stop = None;
+            worker.pending_restore = None;
+            if let Some(context) = worker.restore_candidate_context.take() {
+                context.discard_candidate();
+            }
+            worker.restore_guard.rotate();
+            worker.restore_guard.finish(restore_receipt);
+            worker.status = WorkerStatus::Stopped;
+            worker.worker_state = None;
+            worker.restore_intent = WorkerRestoreIntent::Explicit;
+            worker.internal_workers.clear();
+            worker.execution_bound = false;
+            state.persist_worker_record(&worker)?;
+            state.workers.insert(request.worker_id, worker);
+            state.publish_worker_upsert(request.worker_id)?;
+        }
+        // This is storage-owner evidence under the same lock that permanently
+        // excludes create/restore, not an inference from catalog projection.
+        #[cfg(feature = "fs-store")]
+        let originals_absent = !state.workers.contains_key(&request.worker_id)
+            && state
+                .fs_store()
+                .ok_or_else(|| {
+                    RuntimeError::InvalidRequest(
+                        "Subject original absence requires fs storage".into(),
+                    )
+                })?
+                .worker_originals_absent(request.worker_id)?;
+        #[cfg(not(feature = "fs-store"))]
+        let originals_absent = false;
+        let response = runtime_api::SubjectDeleteWorkerResponse {
+            workspace_id: request.workspace_id.clone(),
+            worker_id: request.worker_id,
+            create_fingerprint: request.create_fingerprint.clone(),
+            operation_id: request.operation_id.clone(),
+            originals_absent,
+        };
+        state
+            .subject_delete_worker_fences
+            .get_mut(&request.worker_id)
+            .expect("delete fence retained under Worker operation lock")
+            .response = Some(response.clone());
+        state.persist_runtime_snapshot()?;
+        Ok(response)
+    }
+}

crates/worker-runtime/src/runtime/subject_delete_tests.rs

@@ -0,0 +1,274 @@
+// Runtime component tests use real filesystem persistence and replace only the
+// external execution boundary. Actual Controller shutdown is tested by the adapter.
+#[cfg(feature = "fs-store")]
+#[test]
+fn subject_delete_reserved_id_survives_unknown_reopen_and_rejects_identity_changes() {
+    let root = tempfile::tempdir().unwrap();
+    let options =
+        crate::fs_store::FsRuntimeStoreOptions::new(root.path()).with_runtime_id("test-runtime");
+    let scoped = scope("workspace-a", "server-a");
+    let create = scoped_task_request("delayed create", "workspace-a");
+    let request = runtime_api::SubjectDeleteWorkerRequest {
+        workspace_id: scoped.workspace_id.clone(),
+        worker_id: create.worker_id,
+        create_fingerprint: create.create_fingerprint.clone(),
+        operation_id: "subject-delete-1".into(),
+    };
+    let backend = Arc::new(TestExecutionBackend::default());
+    let runtime =
+        Runtime::with_fs_store_and_execution_backend(options.clone(), backend.clone()).unwrap();
+    assert!(
+        runtime
+            .subject_delete_worker_scoped(&scoped, request.clone())
+            .is_err()
+    );
+    assert!(
+        runtime.lock().unwrap().subject_delete_worker_fences[&create.worker_id]
+            .response
+            .is_none()
+    );
+    assert!(
+        runtime
+            .create_worker_scoped(&scoped, create.clone())
+            .is_err()
+    );
+    assert_eq!(backend.deletion_checks.load(Ordering::SeqCst), 1);
+    drop(runtime);
+    let runtime =
+        Runtime::with_fs_store_and_execution_backend(options.clone(), backend.clone()).unwrap();
+    assert!(
+        runtime
+            .create_worker_scoped(&scoped, create.clone())
+            .is_err()
+    );
+    assert!(
+        runtime
+            .subject_delete_worker_scoped(&scoped, request.clone())
+            .is_err()
+    );
+    backend.deletion_confirmed.store(true, Ordering::SeqCst);
+    let receipt = runtime
+        .subject_delete_worker_scoped(&scoped, request.clone())
+        .unwrap();
+    let mut expected = serde_json::to_value(&request).unwrap();
+    expected["originals_absent"] = true.into();
+    assert_eq!(serde_json::to_value(&receipt).unwrap(), expected);
+    for index in 0..4 {
+        let mut changed = request.clone();
+        match index {
+            0 => changed.worker_id = WorkerId::now_v7(),
+            1 => changed.operation_id.push_str("-changed"),
+            2 => changed.create_fingerprint.push_str("-changed"),
+            _ => changed.workspace_id.push_str("-changed"),
+        }
+        assert!(
+            runtime
+                .subject_delete_worker_scoped(&scoped, changed)
+                .is_err()
+        );
+    }
+    assert!(
+        runtime
+            .subject_delete_worker_scoped(&scope("workspace-a", "server-b"), request.clone())
+            .is_err()
+    );
+    assert!(
+        runtime
+            .subject_delete_worker_scoped(&scope("workspace-b", "server-a"), request.clone())
+            .is_err()
+    );
+    assert!(
+        !runtime
+            .lock()
+            .unwrap()
+            .forget_workspace_owner_if_unused("workspace-a")
+    );
+    drop(runtime);
+    // Even a saved receipt must not manufacture fresh shutdown proof on reopen.
+    let backend = Arc::new(TestExecutionBackend::default());
+    let runtime = Runtime::with_fs_store_and_execution_backend(options, backend.clone()).unwrap();
+    assert_eq!(*backend.restore_count.lock().unwrap(), 0);
+    assert!(
+        runtime
+            .subject_delete_worker_scoped(&scoped, request.clone())
+            .is_err()
+    );
+    backend.deletion_confirmed.store(true, Ordering::SeqCst);
+    assert_eq!(
+        runtime
+            .subject_delete_worker_scoped(&scoped, request)
+            .unwrap(),
+        receipt
+    );
+    assert!(runtime.create_worker_scoped(&scoped, create).is_err());
+}
+
+#[cfg(feature = "fs-store")]
+#[test]
+fn subject_delete_existing_stopped_or_active_worker_preserves_record_and_allows_canonical_removal()
+{
+    for stopped in [false, true] {
+        let root = tempfile::tempdir().unwrap();
+        let backend = Arc::new(TestExecutionBackend::default());
+        backend.deletion_confirmed.store(true, Ordering::SeqCst);
+        let options = crate::fs_store::FsRuntimeStoreOptions::new(root.path())
+            .with_runtime_id("test-runtime");
+        let runtime =
+            Runtime::with_fs_store_and_execution_backend(options.clone(), backend.clone()).unwrap();
+        runtime.store_config_bundle(test_bundle()).unwrap();
+        let scoped = scope("workspace-a", "server-a");
+        let create = scoped_task_request("subject body", "workspace-a");
+        let worker = runtime
+            .create_worker_scoped(&scoped, create.clone())
+            .unwrap();
+        if stopped {
+            runtime.stop_worker(&worker.worker_ref, None).unwrap();
+        }
+        let request = runtime_api::SubjectDeleteWorkerRequest {
+            workspace_id: scoped.workspace_id.clone(),
+            worker_id: create.worker_id,
+            create_fingerprint: create.create_fingerprint.clone(),
+            operation_id: "delete-body".into(),
+        };
+        let mut mismatch = request.clone();
+        mismatch.create_fingerprint.push_str("-wrong");
+        assert!(
+            runtime
+                .subject_delete_worker_scoped(&scoped, mismatch)
+                .is_err()
+        );
+        let mut mismatch = request.clone();
+        mismatch.workspace_id = "workspace-b".into();
+        assert!(
+            runtime
+                .subject_delete_worker_scoped(&scope("workspace-b", "server-b"), mismatch)
+                .is_err()
+        );
+        assert!(
+            !runtime
+                .lock()
+                .unwrap()
+                .subject_delete_worker_fences
+                .contains_key(&create.worker_id)
+        );
+        // A lost Worker settlement cannot be reported as completed deletion.
+        runtime
+            .test_runtime_store()
+            .fail_next_worker_write(crate::fs_store::AtomicWriteFault::AfterRename);
+        assert!(
+            runtime
+                .subject_delete_worker_scoped(&scoped, request.clone())
+                .is_err()
+        );
+        let receipt = runtime
+            .subject_delete_worker_scoped(&scoped, request.clone())
+            .unwrap();
+        assert!(!receipt.originals_absent, "a stopped catalog record still has original material");
+        assert_eq!(
+            runtime.worker_detail(&worker.worker_ref).unwrap().status,
+            WorkerStatus::Stopped
+        );
+        assert!(
+            runtime
+                .restore_worker(
+                    &worker.worker_ref,
+                    runtime.test_restore_request(&worker.worker_ref)
+                )
+                .is_err()
+        );
+        assert!(
+            runtime
+                .create_worker_scoped(&scoped, create.clone())
+                .is_err()
+        );
+        let record = runtime
+            .test_runtime_store()
+            .read_worker_record(&worker.worker_ref)
+            .unwrap();
+        assert_eq!(record.worker_id, worker.worker_ref.worker_id);
+        drop(runtime);
+        let runtime =
+            Runtime::with_fs_store_and_execution_backend(options, backend.clone()).unwrap();
+        assert!(
+            runtime
+                .restore_worker(
+                    &worker.worker_ref,
+                    runtime.test_restore_request(&worker.worker_ref)
+                )
+                .is_err()
+        );
+        assert_eq!(
+            runtime
+                .subject_delete_worker_scoped(&scoped, request)
+                .unwrap(),
+            receipt
+        );
+        runtime
+            .delete_worker_scoped(&scoped, &worker.worker_ref)
+            .unwrap();
+        assert!(runtime.create_worker_scoped(&scoped, create).is_err());
+        assert!(
+            !runtime
+                .lock()
+                .unwrap()
+                .forget_workspace_owner_if_unused("workspace-a")
+        );
+    }
+}
+
+#[cfg(feature = "fs-store")]
+#[test]
+fn subject_delete_unavailable_backend_never_issues_receipt_but_preserves_exclusion() {
+    let root = tempfile::tempdir().unwrap();
+    let options =
+        crate::fs_store::FsRuntimeStoreOptions::new(root.path()).with_runtime_id("test-runtime");
+    let scoped = scope("workspace-a", "server-a");
+    let create = scoped_task_request("reserved without backend", "workspace-a");
+    let request = runtime_api::SubjectDeleteWorkerRequest {
+        workspace_id: scoped.workspace_id.clone(),
+        worker_id: create.worker_id,
+        create_fingerprint: create.create_fingerprint.clone(),
+        operation_id: "delete-offline".into(),
+    };
+    let runtime = Runtime::with_fs_store(options.clone()).unwrap();
+    assert!(
+        runtime
+            .subject_delete_worker_scoped(&scoped, request.clone())
+            .is_err()
+    );
+    assert!(
+        runtime.lock().unwrap().subject_delete_worker_fences[&create.worker_id]
+            .response
+            .is_none()
+    );
+    drop(runtime);
+    let backend = Arc::new(TestExecutionBackend::default());
+    backend.deletion_confirmed.store(true, Ordering::SeqCst);
+    let runtime = Runtime::with_fs_store_and_execution_backend(options, backend).unwrap();
+    assert!(runtime.create_worker_scoped(&scoped, create).is_err());
+    runtime
+        .subject_delete_worker_scoped(&scoped, request)
+        .unwrap();
+}
+
+#[cfg(feature = "fs-store")]
+#[test]
+fn subject_delete_missing_catalog_does_not_claim_residual_originals_absent() {
+    let root = tempfile::tempdir().unwrap();
+    let options = crate::fs_store::FsRuntimeStoreOptions::new(root.path()).with_runtime_id("test-runtime");
+    let backend = Arc::new(TestExecutionBackend::default());
+    backend.deletion_confirmed.store(true, Ordering::SeqCst);
+    let runtime = Runtime::with_fs_store_and_execution_backend(options, backend).unwrap();
+    let scoped = scope("workspace-a", "server-a");
+    let create = scoped_task_request("unpublished original", "workspace-a");
+    let original = root.path().join("workers").join(create.worker_id.to_string()).join("session/original.jsonl");
+    std::fs::create_dir_all(original.parent().unwrap()).unwrap();
+    std::fs::write(&original, "preserve original text").unwrap();
+    let receipt = runtime.subject_delete_worker_scoped(&scoped, runtime_api::SubjectDeleteWorkerRequest {
+        workspace_id: scoped.workspace_id.clone(), worker_id: create.worker_id,
+        create_fingerprint: create.create_fingerprint.clone(), operation_id: "delete-unpublished".into(),
+    }).unwrap();
+    assert!(!receipt.originals_absent);
+    assert_eq!(std::fs::read_to_string(original).unwrap(), "preserve original text");
+    assert!(runtime.create_worker_scoped(&scoped, create).is_err());
+}

crates/worker-runtime/src/subject_delete_backend_tests.rs

@@ -0,0 +1,285 @@
+// Integration of Runtime's durable fence with the real adapter and Controller;
+// MockFactory replaces only model/provider/profile construction for a hanging run.
+#[test]
+#[cfg(feature = "fs-store")]
+#[serial_test::serial(worker_allocation)]
+fn subject_delete_running_controller_confirms_shutdown_and_preserves_history() {
+    let root = tempfile::tempdir().unwrap();
+    let client = MockClient::sequential(vec![
+        MockResponse::Complete(simple_text_events()),
+        MockResponse::Hang(vec![]),
+    ]);
+    let backend = Arc::new(
+        WorkerRuntimeExecutionBackend::new(MockFactory {
+            client: client.clone(),
+            runtime_base: root.path().join("control"),
+            cwd: root.path().to_path_buf(),
+            store_dir: root.path().join("sessions"),
+            worker_metadata_dir: root.path().join("metadata"),
+            observed_cwds: Arc::default(),
+            observed_workspace_clients: Arc::default(),
+        })
+        .unwrap(),
+    );
+    let runtime = EmbeddedRuntime::with_fs_store_and_execution_backend(
+        crate::fs_store::FsRuntimeStoreOptions::new(root.path().join("catalog"))
+            .with_runtime_id("delete-test"),
+        backend.clone(),
+    )
+    .unwrap();
+    runtime.store_config_bundle(test_bundle()).unwrap();
+    let scope = crate::runtime::RuntimeWorkspaceScope::new("ws-test", "server-test");
+    let mut create = create_request("running Subject body");
+    create.workspace_api = Some(WorkspaceApiRef {
+        workspace_id: scope.workspace_id.clone(),
+        base_url: "https://workspace.invalid".into(),
+    });
+    create.memory_settings = Some(manifest::WorkspaceMemorySettingsSnapshot {
+        workspace_id: scope.workspace_id.clone(),
+        language: "English".into(),
+    });
+    let worker = runtime
+        .create_worker_scoped(&scope, create.clone())
+        .unwrap();
+    runtime
+        .send_input(&worker.worker_ref, WorkerInput::user("settled history"))
+        .unwrap();
+    let execution = backend.workers.lock().unwrap()[&worker.worker_ref].clone();
+    backend
+        .run_on_adapter_runtime({
+            let handle = execution.handle.clone();
+            let client = client.clone();
+            async move {
+                tokio::time::timeout(Duration::from_secs(5), async {
+                    while client.call_count.load(Ordering::SeqCst) < 1
+                        || handle.shared_state.catalog_status() != WorkerStatus::Idle
+                    {
+                        tokio::task::yield_now().await;
+                    }
+                })
+                .await
+                .map_err(|error| error.to_string())?;
+                Ok(())
+            }
+        })
+        .unwrap();
+    let before = persisted_files(&root.path().join("sessions"));
+    assert!(!before.is_empty());
+    runtime
+        .send_input(&worker.worker_ref, WorkerInput::user("run until stopped"))
+        .unwrap();
+    backend
+        .run_on_adapter_runtime({
+            let handle = execution.handle.clone();
+            let client = client.clone();
+            async move {
+                tokio::time::timeout(Duration::from_secs(5), async {
+                    while client.call_count.load(Ordering::SeqCst) < 2 {
+                        tokio::task::yield_now().await;
+                    }
+                    assert_eq!(handle.shared_state.catalog_status(), WorkerStatus::Running);
+                })
+                .await
+                .map_err(|error| error.to_string())?;
+                Ok(())
+            }
+        })
+        .unwrap();
+    let request = runtime_api::SubjectDeleteWorkerRequest {
+        workspace_id: scope.workspace_id.clone(),
+        worker_id: create.worker_id,
+        create_fingerprint: create.create_fingerprint.clone(),
+        operation_id: "delete-running".into(),
+    };
+    runtime
+        .subject_delete_worker_scoped(&scope, request.clone())
+        .unwrap();
+    assert!(execution.handle.protocol_is_closed());
+    assert!(execution.tasks.tasks.lock().unwrap().is_empty());
+    assert!(backend.workers.lock().unwrap().is_empty());
+    assert!(backend.pending_restores.lock().unwrap().is_empty());
+    assert_eq!(
+        runtime.worker_detail(&worker.worker_ref).unwrap().status,
+        crate::catalog::WorkerStatus::Stopped
+    );
+    // Preserve the settled prefix. Ordinary Controller empty-turn rollback remains unchanged.
+    let after = persisted_files(&root.path().join("sessions"));
+    for (path, bytes) in before {
+        let entries = |bytes: &[u8]| {
+            bytes
+                .split(|b| *b == b'\n')
+                .filter(|line| !line.is_empty())
+                .map(|line| serde_json::from_slice::<serde_json::Value>(line).unwrap())
+                .collect::<Vec<_>>()
+        };
+        assert!(
+            entries(&after[&path]).starts_with(&entries(&bytes)),
+            "{path:?} BEFORE={:?} AFTER={:?}",
+            entries(&bytes),
+            entries(&after[&path])
+        );
+    }
+    assert!(runtime.create_worker_scoped(&scope, create).is_err());
+    assert!(
+        runtime
+            .restore_worker(
+                &worker.worker_ref,
+                runtime.test_restore_request(&worker.worker_ref)
+            )
+            .is_err()
+    );
+    runtime
+        .subject_delete_worker_scoped(&scope, request)
+        .unwrap();
+    assert_eq!(client.call_count.load(Ordering::SeqCst), 2);
+}
+
+#[test]
+#[serial_test::serial(worker_allocation)]
+#[cfg(feature = "http-server")]
+fn subject_delete_unregistered_profile_controller_retries_unknown_shutdown_without_erasing_session()
+{
+    let root = tempfile::tempdir().unwrap();
+    let (backend, request) = profile_stop_fixture(root.path());
+    let execution = backend.workers.lock().unwrap()[&request.worker_ref].clone();
+    let deletion = runtime_api::SubjectDeleteWorkerRequest {
+        workspace_id: request
+            .workspace_scope
+            .as_ref()
+            .unwrap()
+            .workspace_id
+            .clone(),
+        worker_id: request.worker_ref.worker_id,
+        create_fingerprint: request.request.create_fingerprint.clone(),
+        operation_id: "delete-unregistered".into(),
+    };
+    let mut bad = deletion.clone();
+    bad.create_fingerprint.push_str("-wrong");
+    assert!(backend.preflight_subject_delete_worker(&bad).is_err());
+    assert!(backend.subject_delete_worker(&bad).is_err());
+    let mut bad = deletion.clone();
+    bad.workspace_id.push_str("-wrong");
+    assert!(backend.subject_delete_worker(&bad).is_err());
+    assert!(
+        backend.admissions.lock().unwrap()[&request.worker_ref]
+            .deletion
+            .is_none()
+    );
+    let preparing = execution.clone();
+    backend
+        .run_on_adapter_runtime(async move {
+            prepare_rejected_shutdown(&preparing, false, None).await;
+            Ok(())
+        })
+        .unwrap();
+    let session_root = root
+        .path()
+        .join("runtime/workers")
+        .join(request.worker_ref.worker_id.to_string())
+        .join("session");
+    let before = persisted_files(&session_root);
+    assert!(!before.is_empty());
+    assert!(
+        backend
+            .subject_delete_worker(&deletion)
+            .unwrap_err()
+            .contains("Conflict")
+    );
+    assert!(
+        backend
+            .workers
+            .lock()
+            .unwrap()
+            .contains_key(&request.worker_ref)
+    );
+    assert!(matches!(
+        backend.restore_worker(request.clone()),
+        WorkerExecutionSpawnResult::Rejected(_)
+    ));
+    backend.subject_delete_worker(&deletion).unwrap();
+    backend.subject_delete_worker(&deletion).unwrap();
+    assert!(execution.handle.protocol_is_closed());
+    assert!(execution.tasks.tasks.lock().unwrap().is_empty());
+    assert!(backend.workers.lock().unwrap().is_empty());
+    assert_eq!(persisted_files(&session_root), before);
+    assert!(backend.preflight_restore(&request).is_err());
+    assert!(
+        backend
+            .activate_restored_worker(request.operation_id, &request.worker_ref)
+            .is_err()
+    );
+}
+
+#[test]
+#[serial_test::serial(worker_allocation)]
+fn subject_delete_pending_restore_fences_late_controller_and_never_restarts_it() {
+    let root = tempfile::tempdir().unwrap();
+    let restores = Arc::new(AtomicUsize::new(0));
+    let release = Arc::new(tokio::sync::Notify::new());
+    let handles = Arc::new(Mutex::new(Vec::new()));
+    let backend = WorkerRuntimeExecutionBackend::new(LateControllerFactory {
+        inner: MockFactory {
+            client: MockClient::new(vec![]),
+            runtime_base: root.path().join("control"),
+            cwd: root.path().to_path_buf(),
+            store_dir: root.path().join("sessions"),
+            worker_metadata_dir: root.path().join("metadata"),
+            observed_cwds: Arc::default(),
+            observed_workspace_clients: Arc::default(),
+        },
+        restores: restores.clone(),
+        release: release.clone(),
+        actual_handles: handles.clone(),
+    })
+    .unwrap()
+    .with_spawn_restore_timeout(Duration::from_millis(1));
+    let mut request = direct_restore_request(WorkerRef::new(WorkerId::now_v7()));
+    request.workspace_scope = Some(crate::runtime::RuntimeWorkspaceScope::new(
+        "ws-test",
+        "server-test",
+    ));
+    request.request.workspace_api = Some(WorkspaceApiRef {
+        workspace_id: "ws-test".into(),
+        base_url: "https://workspace.invalid".into(),
+    });
+    assert!(matches!(
+        backend.restore_worker(request.clone()),
+        WorkerExecutionSpawnResult::ReconciliationRequired { .. }
+    ));
+    let deletion = runtime_api::SubjectDeleteWorkerRequest {
+        workspace_id: "ws-test".into(),
+        worker_id: request.worker_ref.worker_id,
+        create_fingerprint: request.request.create_fingerprint.clone(),
+        operation_id: "delete-pending".into(),
+    };
+    // Unfinished factory ownership is unknown, never shutdown success.
+    assert!(
+        backend
+            .subject_delete_worker(&deletion)
+            .unwrap_err()
+            .contains("pending")
+    );
+    assert!(
+        backend
+            .pending_restores
+            .lock()
+            .unwrap()
+            .contains_key(&request.worker_ref)
+    );
+    assert!(
+        backend
+            .activate_restored_worker(request.operation_id, &request.worker_ref)
+            .is_err()
+    );
+    release.notify_one();
+    backend.subject_delete_worker(&deletion).unwrap();
+    assert!(backend.pending_restores.lock().unwrap().is_empty());
+    assert!(backend.workers.lock().unwrap().is_empty());
+    assert_eq!(restores.load(Ordering::SeqCst), 1);
+    assert_eq!(handles.lock().unwrap().len(), 1);
+    assert!(handles.lock().unwrap()[0].protocol_is_closed());
+    assert!(matches!(
+        backend.restore_worker(request),
+        WorkerExecutionSpawnResult::Rejected(_)
+    ));
+}

crates/worker-runtime/src/subject_delete_create_tests.rs

@@ -0,0 +1,101 @@
+// Actual create factory future remains behind Runtime's Worker operation lock;
+// deletion must wait for that owner, then permanently reject the delayed retry.
+struct SubjectDeleteDeferredCreate {
+    entered: mpsc::Sender<()>,
+    release: Arc<tokio::sync::Notify>,
+}
+#[async_trait]
+impl RuntimeWorkerFactory for SubjectDeleteDeferredCreate {
+    async fn prepare_restore(
+        &self,
+        _: WorkerExecutionRestoreRequest,
+    ) -> Result<Box<dyn RuntimeRestoreCandidate>, RuntimeRestoreFailure> {
+        panic!("fenced create must never restore")
+    }
+    async fn spawn_controller(
+        &self,
+        _: WorkerExecutionSpawnRequest,
+    ) -> Result<RuntimeWorkerController, String> {
+        self.entered.send(()).unwrap();
+        self.release.notified().await;
+        Err("create failed before any Controller".into())
+    }
+}
+
+#[test]
+fn subject_delete_serializes_inflight_create_and_rejects_all_late_admission() {
+    let root = tempfile::tempdir().unwrap();
+    let (entered, entry) = mpsc::channel();
+    let release = Arc::new(tokio::sync::Notify::new());
+    let backend = Arc::new(
+        WorkerRuntimeExecutionBackend::new(SubjectDeleteDeferredCreate {
+            entered,
+            release: release.clone(),
+        })
+        .unwrap(),
+    );
+    let runtime = EmbeddedRuntime::with_fs_store_and_execution_backend(
+        crate::fs_store::FsRuntimeStoreOptions::new(root.path()).with_runtime_id("delete-test"),
+        backend.clone(),
+    )
+    .unwrap();
+    runtime.store_config_bundle(test_bundle()).unwrap();
+    let scope = crate::runtime::RuntimeWorkspaceScope::new("ws-test", "server-test");
+    let mut create = create_request("inflight create");
+    create.workspace_api = Some(WorkspaceApiRef {
+        workspace_id: scope.workspace_id.clone(),
+        base_url: "https://workspace.invalid".into(),
+    });
+    create.memory_settings = Some(manifest::WorkspaceMemorySettingsSnapshot {
+        workspace_id: scope.workspace_id.clone(),
+        language: "English".into(),
+    });
+    let creating = {
+        let runtime = runtime.clone();
+        let scope = scope.clone();
+        let create = create.clone();
+        std::thread::spawn(move || runtime.create_worker_scoped(&scope, create))
+    };
+    entry.recv_timeout(Duration::from_secs(5)).unwrap();
+    let request = runtime_api::SubjectDeleteWorkerRequest {
+        workspace_id: scope.workspace_id.clone(),
+        worker_id: create.worker_id,
+        create_fingerprint: create.create_fingerprint.clone(),
+        operation_id: "delete-creating".into(),
+    };
+    let deleting = {
+        let runtime = runtime.clone();
+        let scope = scope.clone();
+        let request = request.clone();
+        std::thread::spawn(move || runtime.subject_delete_worker_scoped(&scope, request))
+    };
+    release.notify_one();
+    assert!(creating.join().unwrap().is_err());
+    deleting.join().unwrap().unwrap();
+    assert!(
+        runtime
+            .create_worker_scoped(&scope, create.clone())
+            .is_err()
+    );
+    assert!(backend.workers.lock().unwrap().is_empty());
+    let worker_ref = WorkerRef::new(create.worker_id);
+    let spawn = WorkerExecutionSpawnRequest {
+        worker_ref: worker_ref.clone(),
+        request: create.clone(),
+        workspace_scope: Some(scope.clone()),
+        context: test_execution_context(worker_ref.clone()),
+        workdir_attachments: BTreeMap::new(),
+        config_bundle: None,
+    };
+    assert!(matches!(
+        backend.spawn_worker(spawn),
+        WorkerExecutionSpawnResult::Rejected(_)
+    ));
+    let mut restore = direct_restore_request(worker_ref);
+    restore.request = create;
+    restore.workspace_scope = Some(scope);
+    assert!(matches!(
+        backend.restore_worker(restore),
+        WorkerExecutionSpawnResult::Rejected(_)
+    ));
+}

crates/worker-runtime/src/subject_delete_store_tests.rs

@@ -0,0 +1,104 @@
+#[test]
+fn subject_delete_schema14_migration_adds_exclusion_store_without_changing_worker_or_receipts() {
+    for with_fence in [false, true] {
+        let (_temp, store, worker, path) = canonical_worker_store();
+        let root = store.root.clone();
+        let mut legacy =
+            serde_json::to_value(WorkerAggregateRecord::from_persisted(&worker)).unwrap();
+        legacy["schema_version"] = serde_json::json!(RESTORE_REPAIR_SCHEMA_VERSION);
+        fs::write(&path, serde_json::to_vec(&legacy).unwrap()).unwrap();
+        let id = WorkerId::now_v7();
+        let request = serde_json::json!({"workspace_id": "workspace-a", "worker_id": id,
+            "create_fingerprint": "fenced-create", "operation_id": "delete-1"});
+        let mut response = request.clone();
+        response["originals_absent"] = false.into();
+        let fence =
+            serde_json::json!({ id.to_string(): {"request": request, "response": response} });
+        let mut runtime = serde_json::json!({"schema_version": RESTORE_REPAIR_SCHEMA_VERSION,
+            "display_name": "retained", "backend": "fs_store", "status": "running", "next_diagnostic_id": 1,
+            "workspace_owners": {"workspace-a": "server-a"}, "diagnostics": [],
+            "config_bundles": {}, "subject_create_recovery_fences": {}, "subject_releases": []});
+        if with_fence {
+            runtime["subject_delete_worker_fences"] = fence.clone();
+        }
+        fs::write(
+            root.join(RUNTIME_FILE),
+            serde_json::to_vec(&runtime).unwrap(),
+        )
+        .unwrap();
+        drop(store);
+        let options = FsRuntimeStoreOptions::new(&root).with_runtime_id("test-runtime");
+        let before = fs::read(&path).unwrap();
+        assert!(
+            FsRuntimeStore::migration_plan(&options)
+                .unwrap()
+                .migration_required
+        );
+        assert_eq!(fs::read(&path).unwrap(), before);
+        let opened = FsRuntimeStore::open_or_create(root.clone(), "test-runtime").unwrap();
+        legacy["schema_version"] = serde_json::json!(SCHEMA_VERSION);
+        assert_eq!(
+            read_json::<serde_json::Value>(&path, "read migrated Worker").unwrap(),
+            legacy
+        );
+        let expected = if with_fence {
+            fence
+        } else {
+            serde_json::json!({})
+        };
+        assert_eq!(
+            serde_json::to_value(&opened.state.as_ref().unwrap().subject_delete_worker_fences)
+                .unwrap(),
+            expected
+        );
+        opened
+            .store
+            .write_runtime_snapshot(opened.state.as_ref().unwrap())
+            .unwrap();
+        drop(opened);
+        let reopened = FsRuntimeStore::open_or_create(root, "test-runtime").unwrap();
+        assert_eq!(
+            serde_json::to_value(&reopened.state.unwrap().subject_delete_worker_fences).unwrap(),
+            expected
+        );
+    }
+}
+
+#[test]
+fn subject_delete_store_rejects_missing_exclusion_field_malformed_receipt_and_workspace_owner() {
+    for invalid in 0..4 {
+        let (_temp, store, _worker, _path) = canonical_worker_store();
+        let root = store.root.clone();
+        let id = WorkerId::now_v7();
+        let request = serde_json::json!({"workspace_id": "workspace-a", "worker_id": id,
+            "create_fingerprint": "fenced-create", "operation_id": "delete-1"});
+        let mut response = request.clone();
+        response["originals_absent"] = false.into();
+        let mut runtime = serde_json::json!({"schema_version": SCHEMA_VERSION,
+            "display_name": "retained", "backend": "fs_store", "status": "running", "next_diagnostic_id": 1,
+            "workspace_owners": {"workspace-a": "server-a"}, "diagnostics": [],
+            "subject_delete_worker_fences": { id.to_string(): {"request": request, "response": response} }});
+        match invalid {
+            0 => {
+                runtime
+                    .as_object_mut()
+                    .unwrap()
+                    .remove("subject_delete_worker_fences");
+            }
+            1 => {
+                runtime["subject_delete_worker_fences"][id.to_string()]["response"]["create_fingerprint"] =
+                    "different".into()
+            }
+            2 => runtime["workspace_owners"] = serde_json::json!({}),
+            _ => {
+                runtime["subject_delete_worker_fences"][id.to_string()]["request"]["worker_id"] =
+                    WorkerId::now_v7().to_string().into()
+            }
+        }
+        let bytes = serde_json::to_vec(&runtime).unwrap();
+        fs::write(root.join(RUNTIME_FILE), &bytes).unwrap();
+        drop(store);
+        assert!(FsRuntimeStore::open_or_create(root.clone(), "test-runtime").is_err());
+        assert_eq!(fs::read(root.join(RUNTIME_FILE)).unwrap(), bytes);
+    }
+}

crates/worker-runtime/src/test_support.rs

@@ -215,7 +215,8 @@ impl StoppedWorkerTemplate {
         snapshot
             .validate(&root.join(RUNTIME_FILE))
             .map_err(|_| reject("unsupported Runtime schema"))?;
-        if !snapshot.subject_create_recovery_fences.is_empty()
+        if !snapshot.subject_delete_worker_fences.is_empty()
+            || !snapshot.subject_create_recovery_fences.is_empty()
             || !snapshot.subject_releases.is_empty()
         {
             return Err(reject("source has lifecycle operations"));
@@ -427,6 +428,7 @@ impl StoppedWorkerTemplate {
             )?;
             self.validate_session(&session)?;
             store.write_runtime_snapshot(&PersistedRuntimeState {
+                subject_delete_worker_fences: BTreeMap::new(),
                 subject_create_recovery_fences: BTreeMap::new(),
                 subject_releases: Vec::new(),
                 // Match normal store initialization: this is catalog availability,

crates/worker-runtime/src/worker_backend.rs

@@ -3415,6 +3415,14 @@ struct SubjectControllerReservation {
     state: runtime_api::SubjectReleaseState,
 }
 
+// Admission identity is retained even when execution publication or stop settlement
+// failed. Runtime owns durable exclusion; this guards the adapter's delayed calls.
+struct WorkerAdmission {
+    workspace_id: Option<String>,
+    create_fingerprint: String,
+    deletion: Option<runtime_api::SubjectDeleteWorkerRequest>,
+}
+
 /// Worker execution backend backed by real worker crate Workers.
 pub struct WorkerRuntimeExecutionBackend<F = ProfileRuntimeWorkerFactory> {
     #[cfg(test)]
@@ -3438,6 +3446,7 @@ pub struct WorkerRuntimeExecutionBackend<F = ProfileRuntimeWorkerFactory> {
         >,
     >,
     worker_locks: Mutex<HashMap<WorkerRef, Arc<Mutex<()>>>>,
+    admissions: Mutex<HashMap<WorkerRef, WorkerAdmission>>,
     spawn_restore_timeout: Duration,
     subject_reservations: Mutex<HashMap<(WorkerRef, String), SubjectControllerReservation>>,
     shutdown_admission_timeout: Duration,
@@ -3464,12 +3473,92 @@ where
             pending_restores: Mutex::new(HashMap::new()),
             completed_restore_failures: Mutex::new(HashMap::new()),
             worker_locks: Mutex::new(HashMap::new()),
+            admissions: Mutex::new(HashMap::new()),
             spawn_restore_timeout: SPAWN_RESTORE_TASK_TIMEOUT,
             subject_reservations: Mutex::new(HashMap::new()),
             shutdown_admission_timeout: Duration::from_secs(5),
         })
     }
 
+    // Caller holds the adapter Worker lock.
+    fn admit_worker(
+        &self,
+        worker: &WorkerRef,
+        workspace: Option<&str>,
+        fingerprint: &str,
+    ) -> Result<(), String> {
+        let mut admissions = self
+            .admissions
+            .lock()
+            .map_err(|_| "worker admission lock poisoned")?;
+        if let Some(saved) = admissions.get(worker) {
+            if saved.deletion.is_some() {
+                return Err("Subject Worker permanently excluded".into());
+            }
+            if saved.workspace_id.as_deref() != workspace || saved.create_fingerprint != fingerprint
+            {
+                return Err("Worker admission identity mismatch".into());
+            }
+        } else {
+            admissions.insert(
+                worker.clone(),
+                WorkerAdmission {
+                    workspace_id: workspace.map(str::to_string),
+                    create_fingerprint: fingerprint.into(),
+                    deletion: None,
+                },
+            );
+        }
+        Ok(())
+    }
+
+    fn validate_subject_delete_identity(
+        &self,
+        request: &runtime_api::SubjectDeleteWorkerRequest,
+    ) -> Result<(), String> {
+        let admissions = self
+            .admissions
+            .lock()
+            .map_err(|_| "worker admission lock poisoned")?;
+        if let Some(saved) = admissions.get(&WorkerRef::new(request.worker_id)) {
+            if saved.workspace_id.as_deref() != Some(request.workspace_id.as_str())
+                || saved.create_fingerprint != request.create_fingerprint
+                || saved
+                    .deletion
+                    .as_ref()
+                    .is_some_and(|saved| saved != request)
+            {
+                return Err("Subject delete execution identity mismatch".into());
+            }
+        }
+        if let Some(pending) = self.pending_restore(&WorkerRef::new(request.worker_id))? {
+            if pending
+                .request
+                .workspace_scope
+                .as_ref()
+                .map(|scope| scope.workspace_id.as_str())
+                != Some(request.workspace_id.as_str())
+                || pending.request.request.create_fingerprint != request.create_fingerprint
+            {
+                return Err("Subject delete pending execution identity mismatch".into());
+            }
+        }
+        Ok(())
+    }
+
+    fn ensure_not_subject_deleted(&self, worker: &WorkerRef) -> Result<(), String> {
+        if self
+            .admissions
+            .lock()
+            .map_err(|_| "worker admission lock poisoned")?
+            .get(worker)
+            .is_some_and(|admission| admission.deletion.is_some())
+        {
+            return Err("Subject Worker permanently excluded".into());
+        }
+        Ok(())
+    }
+
     pub fn with_backend_id(mut self, backend_id: impl Into<String>) -> Self {
         self.backend_id = backend_id.into();
         self
@@ -4739,6 +4828,58 @@ where
         &self.backend_id
     }
 
+    fn preflight_subject_delete_worker(
+        &self,
+        request: &runtime_api::SubjectDeleteWorkerRequest,
+    ) -> Result<(), String> {
+        let worker = WorkerRef::new(request.worker_id);
+        let lock = self.worker_lock(&worker)?;
+        let _operation = lock.lock().map_err(|_| "worker operation lock poisoned")?;
+        self.validate_subject_delete_identity(request)
+    }
+
+    fn subject_delete_worker(
+        &self,
+        request: &runtime_api::SubjectDeleteWorkerRequest,
+    ) -> Result<(), String> {
+        let worker = WorkerRef::new(request.worker_id);
+        let lock = self.worker_lock(&worker)?;
+        let _operation = lock.lock().map_err(|_| "worker operation lock poisoned")?;
+        self.validate_subject_delete_identity(request)?;
+        self.admissions
+            .lock()
+            .map_err(|_| "worker admission lock poisoned")?
+            .insert(
+                worker.clone(),
+                WorkerAdmission {
+                    workspace_id: Some(request.workspace_id.clone()),
+                    create_fingerprint: request.create_fingerprint.clone(),
+                    deletion: Some(request.clone()),
+                },
+            );
+        let result = self.stop_worker_under_lock(&worker);
+        if !result.is_accepted() {
+            return Err(result.message_or_default());
+        }
+        // A live Controller and failed unpublished candidates can coexist. The
+        // ordinary stop's live branch joins the Controller; also reconcile any
+        // factory-owned cache/artifacts before issuing deletion proof.
+        let factory = self.factory.clone();
+        let stopped = worker.clone();
+        self.run_cancellable_on_adapter_runtime(RUNTIME_TASK_TIMEOUT, async move {
+            factory.reconcile_stopped_worker(&stopped).await
+        })?;
+        self.subject_reservations
+            .lock()
+            .map_err(|_| "Subject reservations poisoned")?
+            .retain(|(saved, _), _| saved != &worker);
+        self.completed_restore_failures
+            .lock()
+            .map_err(|_| "completed restores poisoned")?
+            .remove(&worker);
+        Ok(())
+    }
+
     fn recover_subject_create(
         &self,
         request: &runtime_api::SubjectCreateRecoveryRequest,
@@ -5178,6 +5319,19 @@ where
                 ));
             }
         };
+        if let Err(message) = self.admit_worker(
+            &request.worker_ref,
+            request
+                .workspace_scope
+                .as_ref()
+                .map(|scope| scope.workspace_id.as_str()),
+            &request.request.create_fingerprint,
+        ) {
+            return WorkerExecutionSpawnResult::Rejected(WorkerExecutionResult::rejected(
+                WorkerExecutionOperation::Spawn,
+                message,
+            ));
+        }
         match self.pending_restore(&request.worker_ref) {
             Ok(None) => {}
             Ok(Some(_)) => {
@@ -5405,6 +5559,10 @@ where
                 ));
             }
         };
+        self.ensure_not_subject_deleted(&request.worker_ref)
+            .map_err(|message| {
+                WorkerExecutionResult::rejected(WorkerExecutionOperation::Restore, message)
+            })?;
         if self
             .pending_restore(&request.worker_ref)
             .map_err(|message| {
@@ -5499,6 +5657,19 @@ where
                 ));
             }
         };
+        if let Err(message) = self.admit_worker(
+            &request.worker_ref,
+            request
+                .workspace_scope
+                .as_ref()
+                .map(|scope| scope.workspace_id.as_str()),
+            &request.request.create_fingerprint,
+        ) {
+            return WorkerExecutionSpawnResult::Rejected(WorkerExecutionResult::rejected(
+                WorkerExecutionOperation::Restore,
+                message,
+            ));
+        }
         if let Some(result) =
             self.completed_restore_failure(request.operation_id, &request.worker_ref)
         {
@@ -6182,6 +6353,7 @@ where
                 return Err(message);
             }
         };
+        self.ensure_not_subject_deleted(worker_ref)?;
         if let Some(pending) = self.pending_restore(worker_ref)? {
             if pending.request.operation_id != operation_id {
                 return Err("restored Worker operation identity does not match".into());
@@ -6820,6 +6992,10 @@ mod tests {
     };
     use worker::PreparedWorker;
 
+    include!("subject_delete_backend_tests.rs");
+    #[cfg(feature = "fs-store")]
+    include!("subject_delete_create_tests.rs");
+
     // Both candidate and failure suites need the same guarded, checkout-owned
     // temporary root, independently of Runtime's optional filesystem catalog.
     fn restore_failure_tempdir() -> tempfile::TempDir {

crates/workspace-server/src/assignment_tracking_tests.rs

@@ -478,7 +478,8 @@ fn tracking_store_real_schema91_to92_retains_queue_cases_principals_audit_receip
                     (101, "Durable explicit Subject body release".into()),
                     (102, "Durable failed Subject creation recovery".into()),
                     (103, "Passkey metadata and atomic addition results".into()),
-                    (104, "Converge Passkey results and Job input retention".into())
+                    (104, "Converge Passkey results and Job input retention".into()),
+                    (105, "Durable Subject deletion snapshots and Job admission fences".into())
                 ]
             );
             for (table, rows) in retained.iter().zip(original.iter()) {

crates/workspace-server/src/hosts.rs

@@ -1292,6 +1292,13 @@ pub trait WorkspaceWorkerRuntime: Send + Sync {
         })
     }
 
+    fn subject_delete_worker(
+        &self,
+        _request: runtime_api::SubjectDeleteWorkerRequest,
+    ) -> Result<runtime_api::SubjectDeleteWorkerResponse, String> {
+        Err("Subject deletion fencing is unavailable on this Runtime".into())
+    }
+
     fn recover_subject_create(
         &self,
         _request: runtime_api::SubjectCreateRecoveryRequest,
@@ -2269,6 +2276,21 @@ impl RuntimeRegistry {
         runtime.worker_session_attachment(workspace_id, &worker_ref, session_id, attachment_id)
     }
 
+    pub fn subject_delete_worker(
+        &self,
+        runtime_id: &str,
+        request: runtime_api::SubjectDeleteWorkerRequest,
+    ) -> Result<runtime_api::SubjectDeleteWorkerResponse, RuntimeRegistryError> {
+        validate_backend_identifier("runtime_id", runtime_id)?;
+        self.runtime(runtime_id)?
+            .subject_delete_worker(request)
+            .map_err(|message| RuntimeRegistryError::RuntimeOperationFailed {
+                runtime_id: runtime_id.into(),
+                code: "subject_delete_worker_unproven".into(),
+                message,
+            })
+    }
+
     pub fn recover_subject_create(
         &self,
         runtime_id: &str,
@@ -3367,6 +3389,19 @@ impl WorkspaceWorkerRuntime for EmbeddedWorkerRuntime {
             })
     }
 
+    fn subject_delete_worker(
+        &self,
+        request: runtime_api::SubjectDeleteWorkerRequest,
+    ) -> Result<runtime_api::SubjectDeleteWorkerResponse, String> {
+        if request.workspace_id != self.workspace_id {
+            return Err("Subject deletion Workspace mismatch".into());
+        }
+        let scope = RuntimeWorkspaceScope::new(&request.workspace_id, "embedded-backend");
+        self.runtime
+            .subject_delete_worker_scoped(&scope, request)
+            .map_err(|e| e.to_string())
+    }
+
     fn recover_subject_create(
         &self,
         request: runtime_api::SubjectCreateRecoveryRequest,
@@ -4255,7 +4290,10 @@ fn workspace_runtime_operation(method: &str, path_and_query: &str) -> &'static s
     }
     if path.contains("/retention/")
         || (path.starts_with("/v1/workers/") && method == "DELETE")
-        || (path == "/v1/subject-create-recovery" && method == "POST")
+        || (matches!(
+            path,
+            "/v1/subject-create-recovery" | "/v1/subject-delete-worker"
+        ) && method == "POST")
     {
         return "workers:delete";
     }
@@ -5656,6 +5694,18 @@ impl WorkspaceWorkerRuntime for RemoteWorkerRuntime {
         })
     }
 
+    fn subject_delete_worker(
+        &self,
+        request: runtime_api::SubjectDeleteWorkerRequest,
+    ) -> Result<runtime_api::SubjectDeleteWorkerResponse, String> {
+        self.run_runtime_api(
+            self.request_timeout,
+            MAX_REMOTE_RUNTIME_RESPONSE_BYTES,
+            move |client| async move { client.subject_delete_worker(request).await },
+        )
+        .map_err(|diagnostic| diagnostic.message)
+    }
+
     fn recover_subject_create(
         &self,
         request: runtime_api::SubjectCreateRecoveryRequest,
@@ -8507,6 +8557,57 @@ mod tests {
         );
     }
 
+    #[test]
+    fn remote_subject_delete_uses_generated_exact_identity_transport() {
+        assert_eq!(
+            workspace_runtime_operation("POST", "/v1/subject-delete-worker"),
+            "workers:delete"
+        );
+        let request = runtime_api::SubjectDeleteWorkerRequest {
+            workspace_id: "workspace-test".into(),
+            worker_id: EmbeddedWorkerId::now_v7(),
+            create_fingerprint: "sha256:reserved-create".into(),
+            operation_id: "delete-worker-1".into(),
+        };
+        let response = runtime_api::SubjectDeleteWorkerResponse {
+            originals_absent: true,
+            workspace_id: request.workspace_id.clone(),
+            worker_id: request.worker_id,
+            create_fingerprint: request.create_fingerprint.clone(),
+            operation_id: request.operation_id.clone(),
+        };
+        // Only remote transport is substituted; actual Controller shutdown and
+        // signed admission are covered by worker-runtime's independent suites.
+        let (base_url, server) = serve_mock_http(vec![mock_response(
+            "POST",
+            "/v1/subject-delete-worker",
+            true,
+            200,
+            serde_json::to_string(&response).unwrap(),
+        )]);
+        let registry = RuntimeRegistry::new(Vec::new());
+        registry.register(
+            RemoteWorkerRuntime::new(
+                RemoteRuntimeConfig::new(
+                    "remote:delete",
+                    "Deletion transport fixture",
+                    base_url,
+                    Some("secret-token".into()),
+                ),
+                "workspace-test".into(),
+                "http://127.0.0.1:8787".into(),
+            )
+            .unwrap(),
+        );
+        assert_eq!(
+            registry
+                .subject_delete_worker("remote:delete", request)
+                .unwrap(),
+            response
+        );
+        server.join().unwrap();
+    }
+
     #[test]
     fn remote_subject_create_recovery_uses_generated_management_transport() {
         assert_eq!(

crates/workspace-server/src/implementation_result_tests.rs

@@ -367,14 +367,54 @@ async fn implementation_result_rejects_forged_evidence_and_rolls_back_without_no
         .unwrap();
 }
 
-#[tokio::test]
-async fn implementation_result_v97_to_v98_preserves_legacy_bytes_receipts_and_notification_evidence() {
-    let (dir, store) = tracking_store_fixture().await;
-    tracking_store_assign(&store, "delegation", "assign");
-    let worker = routing_worker_assign(&store, "implementation").worker;
-    // Reconstruct schema97 from a fresh current-schema fixture, including its historical capture.
-    store.with_conn(|conn| {
-        conn.execute_batch("DROP TRIGGER notification_mr_event;
+// Preserve seeded assignment evidence while rebuilding the actual pre-business
+// capture composition. Changing only a receipt leaves schema105 admission fences
+// and erasure guards in an otherwise legacy fixture.
+fn reconstruct_implementation_schema96(conn: &Connection) -> Result<()> {
+    assert_eq!(current_schema_version(conn)?, 105);
+    let directory = tempfile::tempdir().unwrap();
+    let path = directory.path().join("retained96.db");
+    prepare_retained_schema(&path, 96);
+    let retained = Connection::open(path)?;
+    for trigger in [
+        "notification_sources_no_delete",
+        "notification_decisions_no_delete",
+        "notification_requests_no_delete",
+        "notification_acknowledgements_no_delete",
+        "notification_failures_no_delete",
+        "notification_job_targets_no_delete",
+        "notification_job_legacy_no_delete",
+        "notification_source_preparation_failures_no_delete",
+    ] {
+        let definition: String = retained.query_row(
+            "SELECT sql FROM sqlite_schema WHERE type='trigger' AND name=?1",
+            [trigger],
+            |row| row.get(0),
+        )?;
+        conn.execute_batch(&format!("DROP TRIGGER {trigger}; {definition};"))?;
+    }
+    for trigger in [
+        "subject_deleted_job_insert",
+        "subject_deleted_job_result",
+        "subject_deleted_attempt_insert",
+        "subject_deleted_attempt_result",
+        "subject_deleted_worker_reservation",
+        "subject_deleted_notification_source",
+        "subject_deleted_notification_payload",
+        "subject_deleted_notification_send",
+    ] {
+        conn.execute_batch(&format!("DROP TRIGGER {trigger};"))?;
+    }
+    // Children before parents; dropping the tables also drops snapshot guards.
+    conn.execute_batch(
+        "DROP TABLE subject_deletion_allocations;
+        DROP TABLE subject_deletion_jobs;
+        DROP TABLE subject_deletion_workers;
+        DROP TABLE subject_deletions;
+        UPDATE __yoi_schema_migrations SET version=104 WHERE version=105;",
+    )?;
+    conn.execute_batch(
+        "DROP TRIGGER notification_mr_event;
             DROP TRIGGER notification_mr_source;
             DROP TRIGGER notification_implementation_result;
             DROP TRIGGER IF EXISTS implementation_delegation_capture;
@@ -396,7 +436,43 @@ async fn implementation_result_v97_to_v98_preserves_legacy_bytes_receipts_and_no
             UPDATE __yoi_schema_migrations SET version=99 WHERE version=100;
             DROP TABLE hosting_administrators; DROP TABLE hosting_settings;
             UPDATE __yoi_schema_migrations SET version=98 WHERE version=99;
-            UPDATE __yoi_schema_migrations SET version=96 WHERE version=98;")?;
+            UPDATE __yoi_schema_migrations SET version=96 WHERE version=98;",
+    )?;
+    assert_eq!(current_schema_version(conn)?, 96);
+    assert_eq!(conn.query_row(
+        "SELECT count(*) FROM sqlite_schema WHERE name LIKE 'subject_delet%' OR sql LIKE '%subject_deletion%'",
+        [], |row| row.get::<_, i64>(0),
+    )?, 0);
+    for table in [
+        "notification_sources",
+        "notification_decisions",
+        "notification_requests",
+        "notification_acknowledgements",
+        "notification_failures",
+        "notification_job_targets",
+        "notification_job_legacy_receipts",
+        "notification_source_preparation_failures",
+        "backend_jobs",
+        "backend_job_attempts",
+        "worker_create_reservations",
+    ] {
+        assert_eq!(
+            state_contract_schema_signature(conn, table),
+            state_contract_schema_signature(&retained, table),
+            "schema96 {table}"
+        );
+    }
+    Ok(())
+}
+
+#[tokio::test]
+async fn implementation_result_v97_to_v98_preserves_legacy_bytes_receipts_and_notification_evidence() {
+    let (dir, store) = tracking_store_fixture().await;
+    tracking_store_assign(&store, "delegation", "assign");
+    let worker = routing_worker_assign(&store, "implementation").worker;
+    // Reconstruct schema97 from a fresh current-schema fixture, including its historical capture.
+    store.with_conn(|conn| {
+        reconstruct_implementation_schema96(conn)?;
         migrate_business_notifications_v96_to_v97(conn)?;
         assert_eq!(current_schema_version(conn)?, 97);
         Ok(())
@@ -522,24 +598,7 @@ async fn mr_notification_upgrade_recovers_events_not_comments_and_retains_unknow
     store.with_conn(|conn| {
         conn.execute("INSERT INTO ticket_assignment_operation_fences VALUES('w','operation-known-implementation','delegation','r','worker','workspace-orchestrator','tracking-binding',?1)",[serde_json::to_string(&tracking_store_source()).unwrap()])?;
         // Reconstruct the prior composition before its new business capture existed.
-        conn.execute_batch("DROP TRIGGER notification_mr_event; DROP TRIGGER notification_mr_source; DROP TRIGGER notification_implementation_result; DROP TRIGGER IF EXISTS implementation_delegation_capture;
-            DROP TABLE ticket_implementation_results; DROP TABLE ticket_implementation_delegations; DROP TABLE merge_request_source_observations;
-            DROP TRIGGER passkey_metadata_insert;
-            DROP TABLE passkey_addition_receipts;
-            DROP TABLE passkey_metadata;
-            DROP TRIGGER backend_job_input_retirement;
-            DROP TRIGGER backend_job_identity_immutable;
-            ALTER TABLE backend_jobs DROP COLUMN input_disposition;
-            UPDATE __yoi_schema_migrations SET version=102 WHERE version=104;
-            DROP TABLE subject_create_recoveries;
-            UPDATE __yoi_schema_migrations SET version=101 WHERE version=102;
-            DROP TABLE subject_worker_releases;
-            UPDATE __yoi_schema_migrations SET version=100 WHERE version=101;
-            DROP TABLE user_activations;
-            UPDATE __yoi_schema_migrations SET version=99 WHERE version=100;
-            DROP TABLE hosting_administrators; DROP TABLE hosting_settings;
-            UPDATE __yoi_schema_migrations SET version=98 WHERE version=99;
-            UPDATE __yoi_schema_migrations SET version=96 WHERE version=98;")?;
+        reconstruct_implementation_schema96(conn)?;
         conn.execute_batch("INSERT INTO merge_requests VALUES('w','historical-mr','main','open','refs/heads/work','refs/heads/main','3','3');
             INSERT INTO merge_request_ticket_relations VALUES('w','historical-mr','tracking','implements','3');
             INSERT INTO merge_request_thread_events VALUES('w','historical-mr','approved-event',1,'review','{\"subject_ref\":\"source-a\",\"decision\":\"approve\"}',NULL,'3');
@@ -691,24 +750,7 @@ async fn mr_event_actors_preserve_self_suppression_in_capture_and_backfill() {
         ];
         store.with_conn(|conn| {
             if historical {
-                conn.execute_batch("DROP TRIGGER notification_mr_event; DROP TRIGGER notification_mr_source; DROP TRIGGER notification_implementation_result; DROP TRIGGER IF EXISTS implementation_delegation_capture;
-                    DROP TABLE ticket_implementation_results; DROP TABLE ticket_implementation_delegations; DROP TABLE merge_request_source_observations;
-                    DROP TRIGGER passkey_metadata_insert;
-            DROP TABLE passkey_addition_receipts;
-            DROP TABLE passkey_metadata;
-            DROP TRIGGER backend_job_input_retirement;
-            DROP TRIGGER backend_job_identity_immutable;
-            ALTER TABLE backend_jobs DROP COLUMN input_disposition;
-            UPDATE __yoi_schema_migrations SET version=102 WHERE version=104;
-            DROP TABLE subject_create_recoveries;
-            UPDATE __yoi_schema_migrations SET version=101 WHERE version=102;
-            DROP TABLE subject_worker_releases;
-            UPDATE __yoi_schema_migrations SET version=100 WHERE version=101;
-            DROP TABLE user_activations;
-            UPDATE __yoi_schema_migrations SET version=99 WHERE version=100;
-            DROP TABLE hosting_administrators; DROP TABLE hosting_settings;
-            UPDATE __yoi_schema_migrations SET version=98 WHERE version=99;
-            UPDATE __yoi_schema_migrations SET version=96 WHERE version=98;")?;
+                reconstruct_implementation_schema96(conn)?;
             }
             conn.execute_batch("INSERT INTO merge_requests VALUES('w','actor-mr','main','open','work','main','3','3');
                 INSERT INTO merge_request_ticket_relations VALUES('w','actor-mr','tracking','implements','3');")?;

crates/workspace-server/src/latest_schema.sql

@@ -1757,3 +1757,5 @@ WHEN (OLD.runtime_id != NEW.runtime_id OR OLD.worker_id != NEW.worker_id OR OLD.
     WHERE workspace_id = OLD.workspace_id AND runtime_id = OLD.runtime_id
       AND worker_id = OLD.worker_id)
 BEGIN SELECT RAISE(ABORT, 'Worker has unfinished Ticket work'); END;
+
+-- Subject deletion schema is composed by store.rs.

crates/workspace-server/src/notification_delivery.rs

@@ -444,6 +444,28 @@ fn job_result_facts(
 
 pub(super) fn deliver_job_result(api: &WorkspaceApi, acceptance: &BackendJobResultAcceptance) {
     use crate::store::JobNotificationFacts;
+    // A recovered/captured result is not delivery authority. Serialize even the
+    // Runtime send with deletion, so no prepared bytes escape after its fence.
+    let subject = subjektiv_deletion::job_subject(&acceptance.job.request);
+    let gate = match subject
+        .map(|subject| subjektiv_journal::lifecycle_lock(api, subject))
+        .transpose()
+    {
+        Ok(gate) => gate,
+        Err(error) => {
+            tracing::warn!(%error, "Subject Job notification gate unavailable");
+            return;
+        }
+    };
+    let _guard = match gate.as_ref().map(|gate| gate.lock()).transpose() {
+        Ok(guard) => guard,
+        Err(_) => return,
+    };
+    if let Some(subject) = subject
+        && subjektiv_deletion::require_available(api, subject).is_err()
+    {
+        return;
+    }
     let Some(_permit) = api.notification_delivery_lifecycle.begin() else {
         return;
     };

crates/workspace-server/src/notification_routing_tests.rs

@@ -849,7 +849,16 @@ async fn notification_routing_fresh_and_upgraded_schema_and_guards_match() {
     let snapshot = |conn: &Connection| -> Vec<(String, String)> {
         conn.prepare("SELECT name,sql FROM sqlite_schema WHERE name LIKE 'notification_%' OR name LIKE 'ticket_assignment_content%' OR name IN ('ticket_assignment_title_input','ticket_assignment_initial_post_input') ORDER BY name").unwrap().query_map([],|r|Ok((r.get(0)?,r.get(1)?))).unwrap().collect::<rusqlite::Result<_>>().unwrap()
     };
-    let upgraded = snapshot(&conn);
+    assert_eq!(current_schema_version(&conn).unwrap(), 98);
+    drop(conn);
+    // Compare the complete current composition, not upgraded98 against fresh105.
+    let upgraded_store = SqliteWorkspaceStore::open_for_test(&path).unwrap();
+    let upgraded = upgraded_store
+        .with_conn(|conn| {
+            assert_eq!(current_schema_version(conn)?, 105);
+            Ok(snapshot(conn))
+        })
+        .unwrap();
     let (fresh_directory, fresh) = tracking_store_fixture().await;
     fresh
         .with_conn(|conn| {

crates/workspace-server/src/retention.rs

@@ -333,6 +333,15 @@ impl SqliteWorkspaceStore {
                     return Err(StoreError::InvalidInput(if other{"cross-workspace".into()}else{"worker-missing".into()}));
                 }
             };
+            if crate::store::subject_deletion_worker_kind(&tx, &req.workspace_id, &req.worker)?.is_some() {
+                let prior = tx.prepare("SELECT plan_id FROM worker_removal_operations WHERE workspace_id=?1 AND runtime_id=?2 AND worker_id=?3 AND state IN ('executing','failed')")?
+                    .query_map(params![req.workspace_id,req.worker.runtime_id,req.worker.worker_id],|r|r.get::<_,String>(0))?
+                    .collect::<rusqlite::Result<Vec<_>>>()?;
+                for id in prior {
+                    let prior=load_plan(&tx,&id)?.ok_or_else(||StoreError::Store("removal plan disappeared".into()))?;
+                    require_current_subject_deletion_plan(&tx,&prior)?;
+                }
+            }
             let mut blockers=Vec::new();
             if worker.retention_state=="pinned" { blockers.push(WorkerRemovalBlocker::Hold); }
             if let Some((assignment_id,ticket_id))=tx.query_row("SELECT a.assignment_id,a.ticket_id FROM ticket_active_worker_assignments c JOIN ticket_worker_assignments a ON a.workspace_id=c.workspace_id AND a.ticket_id=c.ticket_id AND a.assignment_id=c.assignment_id WHERE a.workspace_id=?1 AND a.runtime_id=?2 AND a.worker_id=?3",params![req.workspace_id,req.worker.runtime_id,req.worker.worker_id],|r|Ok((r.get(0)?,r.get(1)?))).optional()? {
@@ -363,6 +372,7 @@ impl SqliteWorkspaceStore {
             let mut plan=load_plan(&tx,plan_id)?.ok_or_else(||StoreError::InvalidInput(format!("stale:{plan_id}:plan missing")))?;
             if plan.workspace_id!=workspace_id{return Err(StoreError::InvalidInput("cross-workspace".into()));}
             if plan.input_fingerprint!=fp{return Err(StoreError::InvalidInput(format!("fingerprint:{}",plan.operation_id)));}
+            require_current_subject_deletion_plan(&tx, &plan)?;
             if plan.state==WorkerRemovalPlanState::Succeeded{tx.commit()?;return Ok(plan);}
             if plan.state==WorkerRemovalPlanState::Blocked {
                 return Err(StoreError::InvalidInput(format!("blocked:{}",serde_json::to_string(&plan.blockers).unwrap())));
@@ -420,6 +430,8 @@ impl SqliteWorkspaceStore {
                 WorkerRetentionError::Invalid("Worker id must be a canonical UUIDv7".to_string())
             })?;
         let removed_at = plan.created_at.clone();
+        self.with_conn(|conn| require_current_subject_deletion_plan(conn, &plan))
+            .map_err(map_error)?;
         let prior_failure_category = plan.failure_category.clone();
         Ok(PreparedWorkerRemoval {
             runtime_request: WorkerRetentionExecutionRequest {
@@ -459,8 +471,8 @@ impl SqliteWorkspaceStore {
                        WHERE workspace_id=?1 AND runtime_id=?2 AND worker_id=?3
                      )
                    )
-                 ORDER BY CASE state WHEN 'succeeded' THEN 0 ELSE 1 END,
-                          created_at DESC LIMIT 1",
+                 ORDER BY CASE WHEN EXISTS(SELECT 1 FROM subject_deletion_workers d WHERE d.workspace_id=worker_removal_operations.workspace_id AND d.runtime_id=worker_removal_operations.runtime_id AND d.worker_id=worker_removal_operations.worker_id AND d.prior_removal_operation_id=worker_removal_operations.operation_id) THEN 0 WHEN state='succeeded' THEN 1 ELSE 2 END,
+                          created_at DESC,operation_id DESC LIMIT 1",
                 params![workspace_id, worker.runtime_id, worker.worker_id],
                 |row| row.get::<_, String>(0),
             )
@@ -474,6 +486,8 @@ impl SqliteWorkspaceStore {
         let Some(plan) = plan else {
             return Ok(None);
         };
+        self.with_conn(|conn| require_current_subject_deletion_plan(conn, &plan))
+            .map_err(map_error)?;
         let prior_failure_category = plan.failure_category.clone();
         let worker_id = plan
             .worker
@@ -659,6 +673,7 @@ impl SqliteWorkspaceStore {
             let mut plan=load_plan_op(&tx,operation_id)?.ok_or_else(||StoreError::InvalidInput("operation missing".into()))?;
             if plan.workspace_id!=workspace_id{return Err(StoreError::InvalidInput("cross-workspace".into()));}
             if plan.input_fingerprint!=fp||result.input_fingerprint!=fp||result.operation_id!=operation_id{return Err(StoreError::InvalidInput(format!("fingerprint:{operation_id}")));}
+            require_current_subject_deletion_plan(&tx, &plan)?;
             if plan.state==WorkerRemovalPlanState::Succeeded{
                 // Repair projection fences left by the pre-atomic implementation and
                 // return a replayable change for a broadcast missed after commit.
@@ -1024,6 +1039,49 @@ fn load_removal_policy(
     let Some(mut policy) = load_policy(c, w)? else {
         return Ok(None);
     };
+    // Snapshot authority outranks normal policy and Journal cleanup policy. Body
+    // and delegated Sessions must never inherit the ephemeral Job exception.
+    if let Some(is_job) = crate::store::subject_deletion_worker_kind(c, w, worker)? {
+        let update = WorkerRetentionPolicyUpdate {
+            policy_id: if is_job {
+                "subject-deletion-job-v1"
+            } else {
+                "subject-deletion-conversation-v1"
+            }
+            .into(),
+            session_disposition: if is_job {
+                SessionDisposition::Purge
+            } else {
+                SessionDisposition::Archive
+            },
+            metadata_disposition: MetadataDisposition::Tombstone,
+            archive_retention: ArchiveRetention::Forever,
+            // Runtime calls diagnostic archiving Retain, not Archive. Preserve
+            // the Workspace's duration, or thirty days when it normally purges.
+            diagnostics_disposition: if is_job {
+                DiagnosticsDisposition::Purge
+            } else {
+                DiagnosticsDisposition::Retain
+            },
+            diagnostics_retention_seconds: if is_job {
+                None
+            } else {
+                Some(
+                    policy
+                        .diagnostics_retention_seconds
+                        .unwrap_or(30 * 24 * 60 * 60),
+                )
+            },
+        };
+        policy.policy_id = update.policy_id.clone();
+        policy.policy_digest = worker_retention_policy_digest(&update);
+        policy.session_disposition = update.session_disposition;
+        policy.metadata_disposition = update.metadata_disposition;
+        policy.archive_retention = update.archive_retention;
+        policy.diagnostics_disposition = update.diagnostics_disposition;
+        policy.diagnostics_retention_seconds = update.diagnostics_retention_seconds;
+        return Ok(Some(policy));
+    }
     if erased_journal || crate::store::terminal_journal_job_worker(c, w, worker)? {
         let update = WorkerRetentionPolicyUpdate {
             policy_id: if erased_journal {
@@ -1047,6 +1105,39 @@ fn load_removal_policy(
     }
     Ok(Some(policy))
 }
+fn require_current_subject_deletion_plan(
+    c: &Connection,
+    plan: &WorkerRemovalPlan,
+) -> crate::Result<()> {
+    if plan.state == WorkerRemovalPlanState::Succeeded
+        && crate::store::subject_deletion_prior_removal_matches(
+            c,
+            &plan.workspace_id,
+            &plan.worker,
+            &plan.operation_id,
+        )?
+    {
+        // An exact successful receipt pinned before Subject deletion owns its
+        // independent original/archive lifecycle. Never retarget its policy.
+        return Ok(());
+    }
+    if crate::store::subject_deletion_worker_kind(c, &plan.workspace_id, &plan.worker)?.is_some() {
+        let current = load_removal_policy(c, &plan.workspace_id, &plan.worker, false)?
+            .ok_or_else(|| StoreError::InvalidInput("Subject deletion policy missing".into()))?;
+        if plan.session_disposition != current.session_disposition
+            || plan.metadata_disposition != current.metadata_disposition
+            || plan.archive_retention != current.archive_retention
+            || plan.diagnostics_disposition != current.diagnostics_disposition
+        {
+            return Err(stale_error(
+                plan,
+                "Subject deletion retention differs from saved plan; reconcile canonical Runtime removal before retry",
+            ));
+        }
+    }
+    Ok(())
+}
+
 fn load_policy(c: &Connection, w: &str) -> crate::Result<Option<WorkerRetentionPolicy>> {
     c.query_row(
         "SELECT p.policy_id,p.policy_digest,r.session_disposition,r.metadata_disposition,
@@ -2736,4 +2827,78 @@ mod tests {
         );
         assert_eq!(recovered.plan.state, WorkerRemovalPlanState::Failed);
     }
+
+    #[test]
+    fn subject_deletion_snapshot_overrides_policy_without_changing_normal_removal() {
+        let store = setup();
+        let ordinary = store.plan_worker_removal(&req(), &inv()).unwrap();
+        store
+            .prepare_subject_deletion("w", "subject", "delete", &[req().worker.clone()])
+            .unwrap();
+        let body = store.plan_worker_removal(&req(), &inv()).unwrap();
+        assert_eq!(body.session_disposition, SessionDisposition::Archive);
+        assert_eq!(body.archive_retention, ArchiveRetention::Forever);
+        assert_eq!(body.metadata_disposition, MetadataDisposition::Tombstone);
+        assert_eq!(body.diagnostics_disposition, DiagnosticsDisposition::Retain);
+        assert!(body.diagnostics_retention_seconds.is_some());
+        assert_ne!(body.policy_id, ordinary.policy_id);
+        // A saved plan that would discard diagnostics cannot silently stand in
+        // for the Subject conversation archive plan.
+        assert!(matches!(
+            store.begin_worker_removal("w", &ordinary.plan_id, &ordinary.input_fingerprint),
+            Err(WorkerRetentionError::StalePlan { .. })
+        ));
+        let ordinary_store = setup();
+        assert_eq!(
+            ordinary_store
+                .plan_worker_removal(&req(), &inv())
+                .unwrap()
+                .policy_id,
+            ordinary.policy_id
+        );
+    }
+
+    #[test]
+    fn subject_deletion_job_purge_rejects_recovery_of_old_executing_archive() {
+        let store = setup();
+        let old = store.plan_worker_removal(&req(), &inv()).unwrap();
+        store
+            .prepare_worker_removal_execution("w", &old.plan_id, &old.input_fingerprint)
+            .unwrap();
+        store
+            .prepare_subject_deletion("w", "subject", "delete", &[req().worker.clone()])
+            .unwrap();
+        store
+            .with_conn(|c| {
+                c.execute(
+                    "UPDATE subject_deletion_workers SET is_job=1 WHERE workspace_id='w'",
+                    [],
+                )?;
+                Ok(())
+            })
+            .unwrap();
+        assert!(matches!(
+            store.recover_worker_removal_execution("w", &req().worker),
+            Err(WorkerRetentionError::StalePlan { .. })
+        ));
+        assert!(matches!(
+            store.plan_worker_removal(&req(), &inv()),
+            Err(WorkerRetentionError::StalePlan { .. })
+        ));
+        let fresh = store
+            .with_conn(|c| load_removal_policy(c, "w", &req().worker, false))
+            .unwrap()
+            .unwrap();
+        assert_eq!(fresh.session_disposition, SessionDisposition::Purge);
+        assert_eq!(fresh.diagnostics_disposition, DiagnosticsDisposition::Purge);
+        assert_eq!(fresh.metadata_disposition, MetadataDisposition::Tombstone);
+        assert_eq!(
+            store
+                .with_conn(|c| load_plan(c, &old.plan_id))
+                .unwrap()
+                .unwrap()
+                .state,
+            WorkerRemovalPlanState::Executing
+        );
+    }
 }

crates/workspace-server/src/schema_convergence_tests.rs

@@ -91,10 +91,16 @@ mod schema_convergence {
                 assert_eq!(plan.current_schema_version, 103);
                 assert_eq!(
                     plan.migrations,
-                    vec![WorkspaceSchemaMigrationStep {
-                        version: 104,
-                        name: "Converge Passkey results and Job input retention".into(),
-                    }]
+                    vec![
+                        WorkspaceSchemaMigrationStep {
+                            version: 104,
+                            name: "Converge Passkey results and Job input retention".into(),
+                        },
+                        WorkspaceSchemaMigrationStep {
+                            version: 105,
+                            name: "Durable Subject deletion snapshots and Job admission fences".into(),
+                        },
+                    ]
                 );
                 assert_eq!(
                     schema_rows(&conn),
@@ -109,6 +115,7 @@ mod schema_convergence {
                     assert_eq!(feature_rows(conn, job_variant), rows);
                     let mut expected = history.clone();
                     expected.push((104, "Converge Passkey results and Job input retention".into()));
+                    expected.push((105, "Durable Subject deletion snapshots and Job admission fences".into()));
                     assert_eq!(workspace_schema_migration_history(conn)?, expected);
                     for table in ["passkey_credentials", "passkey_metadata", "passkey_addition_receipts", "backend_jobs", "backend_job_attempts"] {
                         assert_eq!(state_contract_schema_signature(conn, table), fresh.with_conn(|c| Ok(state_contract_schema_signature(c, table)))?, "{table}");
@@ -138,7 +145,7 @@ mod schema_convergence {
                         assert_eq!(feature_rows(conn, job_variant), rows);
                         assert_eq!(
                             workspace_schema_migration_history(conn)?.len(),
-                            history.len() + 1
+                            history.len() + 2
                         );
                         Ok(())
                     })
@@ -176,7 +183,7 @@ mod schema_convergence {
                 upgraded
                     .with_conn(|conn| {
                         assert_eq!(feature_rows(conn, job_variant), rows);
-                        assert_eq!(current_schema_version(conn)?, 104);
+                        assert_eq!(current_schema_version(conn)?, 105);
                         Ok(())
                     })
                     .unwrap();

crates/workspace-server/src/server.rs

@@ -28,6 +28,7 @@ use subjektiv::api::*;
 mod backend_job_profile;
 mod external_operation_audit;
 mod subject_authorization;
+mod subjektiv_deletion;
 mod subjektiv_job;
 mod subjektiv_journal;
 mod subjektiv_journal_browser;
@@ -4577,6 +4578,12 @@ impl WorkspaceApi {
             .run(move || recover_workdir_removals(&workdir_recovery_api))
             .await?;
         recover_runtime_removals(&api).await;
+        let deletion_api = api.clone();
+        let deletion_runtime = tokio::runtime::Handle::current();
+        api.host_executors
+            .host()?
+            .run(move || deletion_runtime.block_on(subjektiv_deletion::recover(&deletion_api)))
+            .await?;
         api.host_executors
             .host()?
             .run(move || {
@@ -4604,9 +4611,23 @@ impl WorkspaceApi {
     ) -> Result<BackendJobReservation> {
         self.resolve_backend_job_profile(request)?;
         let now = Utc::now().to_rfc3339_opts(SecondsFormat::Nanos, true);
-        let reservation =
+        let reservation = {
+            let gate = subjektiv_deletion::job_subject(request)
+                .map(|subject| subjektiv_journal::lifecycle_lock(self, subject))
+                .transpose()?;
+            let _guard = gate
+                .as_ref()
+                .map(|gate| {
+                    gate.lock()
+                        .map_err(|_| Error::Store("Subject lifecycle lock poisoned".into()))
+                })
+                .transpose()?;
+            if let Some(subject) = subjektiv_deletion::job_subject(request) {
+                subjektiv_deletion::require_available(self, subject)?;
+            }
             self.store
-                .reserve_backend_job(&self.config.workspace_id, request, &now)?;
+                .reserve_backend_job(&self.config.workspace_id, request, &now)?
+        };
         let result = self.dispatch_backend_job_reservation(reservation);
         if result.is_err() {
             self.drain_reserved_backend_jobs();
@@ -4621,9 +4642,27 @@ impl WorkspaceApi {
     /// immutable request.
     pub fn retry_backend_job(&self, job_id: &str) -> Result<BackendJobReservation> {
         let now = Utc::now().to_rfc3339_opts(SecondsFormat::Nanos, true);
-        let reservation =
+        let reservation = {
+            let current = self
+                .store
+                .get_backend_job(self.workspace_id(), job_id)?
+                .ok_or_else(|| Error::InvalidInput("unknown Backend Job".into()))?;
+            let gate = subjektiv_deletion::job_subject(&current.request)
+                .map(|subject| subjektiv_journal::lifecycle_lock(self, subject))
+                .transpose()?;
+            let _guard = gate
+                .as_ref()
+                .map(|gate| {
+                    gate.lock()
+                        .map_err(|_| Error::Store("Subject lifecycle lock poisoned".into()))
+                })
+                .transpose()?;
+            if let Some(subject) = subjektiv_deletion::job_subject(&current.request) {
+                subjektiv_deletion::require_available(self, subject)?;
+            }
             self.store
-                .reserve_backend_job_retry(&self.config.workspace_id, job_id, &now)?;
+                .reserve_backend_job_retry(&self.config.workspace_id, job_id, &now)?
+        };
         let result = self.dispatch_backend_job_reservation(reservation);
         if result.is_err() {
             self.drain_reserved_backend_jobs();
@@ -4637,13 +4676,8 @@ impl WorkspaceApi {
     ) -> Result<BackendJobReservation> {
         // Reread even a terminal/stale reservation before deciding whether it can
         // dispatch or replay: an explicit erasure may have retired its saved input.
-        let journal_gate = reservation
-            .job
-            .request
-            .grants
-            .subjektiv_journal
-            .as_ref()
-            .map(|grant| subjektiv_journal::lifecycle_lock(self, &grant.subject_id))
+        let journal_gate = subjektiv_deletion::job_subject(&reservation.job.request)
+            .map(|subject| subjektiv_journal::lifecycle_lock(self, subject))
             .transpose()?;
         let _journal_guard = journal_gate
             .as_ref()
@@ -4652,6 +4686,9 @@ impl WorkspaceApi {
                     .map_err(|_| Error::Store("Journal lifecycle lock poisoned".into()))
             })
             .transpose()?;
+        if let Some(subject) = subjektiv_deletion::job_subject(&reservation.job.request) {
+            subjektiv_deletion::require_available(self, subject)?;
+        }
         let current_job = self
             .store
             .get_backend_job(&self.config.workspace_id, &reservation.job.request.job_id)?
@@ -5571,6 +5608,27 @@ impl WorkspaceApi {
         source_worker: &RuntimeWorkerRef,
         submission: &BackendJobResultSubmission,
     ) -> Result<BackendJobResultAcceptance> {
+        let result_job = self
+            .store
+            .get_backend_job(self.workspace_id(), &submission.job_id)?;
+        let subject_gate = result_job
+            .as_ref()
+            .and_then(|job| subjektiv_deletion::job_subject(&job.request))
+            .map(|subject| subjektiv_journal::lifecycle_lock(self, subject))
+            .transpose()?;
+        let subject_guard = subject_gate
+            .as_ref()
+            .map(|gate| {
+                gate.lock()
+                    .map_err(|_| Error::Store("Subject lifecycle lock poisoned".into()))
+            })
+            .transpose()?;
+        if let Some(subject) = result_job
+            .as_ref()
+            .and_then(|job| subjektiv_deletion::job_subject(&job.request))
+        {
+            subjektiv_deletion::require_available(self, subject)?;
+        }
         let accepted_at = Utc::now().to_rfc3339_opts(SecondsFormat::Nanos, true);
         let mut verified_submission = submission.clone();
         if let Some(job) = self
@@ -5696,6 +5754,7 @@ impl WorkspaceApi {
             &verified_submission,
             &accepted_at,
         )?;
+        drop(subject_guard);
         if let Some(job) = self
             .store
             .get_backend_job(&self.config.workspace_id, &submission.job_id)?
@@ -5899,15 +5958,21 @@ impl WorkspaceApi {
                     .map(|assignment| assignment.operation_id.clone())
             })
             .unwrap_or_else(|| format!("manual:{}", WorkerId::now_v7()));
-        let subject = singleton_key
+        let body_subject = singleton_key
             .as_deref()
             .and_then(|key| key.strip_prefix(SUBJEKTIV_SINGLETON_PREFIX));
-        if let Some(subject) = subject
+        if let Some(subject) = body_subject
             && let Err(error) = subjektiv_journal::recover_failed_subject_create(self, subject)
         {
             let diagnostics = cleanup_spawn_created_workdirs(self, &spawned_workdir_ids);
             return Err(ApiError::with_diagnostics(error, diagnostics));
         }
+        let subject = body_subject.or_else(|| {
+            request
+                .resolved_execution_grant
+                .as_ref()
+                .map(|grant| grant.subject_id.as_str())
+        });
         let subject_gate = subject
             .map(|s| subjektiv_journal::lifecycle_lock(self, s))
             .transpose()?;
@@ -5919,6 +5984,9 @@ impl WorkspaceApi {
             })
             .transpose()?;
         if let Some(subject) = subject {
+            subjektiv_deletion::require_available(self, subject)?;
+        }
+        if let Some(subject) = body_subject {
             subjektiv_journal::check_start_allowed(self, subject)?;
         }
         let reservation = match self.config_store.reserve_worker_create(
@@ -5943,11 +6011,11 @@ impl WorkspaceApi {
                 return Err(ApiError::with_diagnostics(error, diagnostics));
             }
         };
-        drop(subject_guard);
         let worker_id = reservation.worker_id;
         if let Some(grant) = request.resolved_execution_grant.as_ref() {
             subject_authorization::bind_reserved_grant(self, grant, &worker_id.to_string())?;
         }
+        drop(subject_guard);
         // A completed exact-source allocation is historical acceptance, not a new
         // launch. Source/grant authorization and the full fingerprint were checked
         // above. Do not reserve its already-linked attachments again, redispatch
@@ -7458,7 +7526,7 @@ fn generated_workspace_contract_router(service: ServerApiContractService) -> Rou
         .merge(server_api::server_api_axum::subjektiv_memory_changes(
             service.clone(),
         ))
-        .merge(server_api::server_api_axum::subjektiv_subject_retire(
+        .merge(server_api::server_api_axum::subjektiv_subject_delete(
             service.clone(),
         ))
         .merge(server_api::server_api_axum::subjektiv_stage_candidate(
@@ -9724,22 +9792,25 @@ impl server_api::ServerApi for ServerApiContractService {
         .map_err(ApiError::into_repository_api_error)
     }
 
-    async fn subjektiv_subject_retire(
+    async fn subjektiv_subject_delete(
         &self,
+        context: server_api::ServerRequestContext,
         workspace_id: String,
         subject_id: String,
-    ) -> std::result::Result<server_api::SubjektivSubjectResponse, server_api::RepositoryApiError>
-    {
-        scoped_retire_subjektiv_subject(
-            State(self.workspace_api()?.clone()),
-            AxumPath(ScopedSubjektivSubjectPath {
-                workspace_id,
-                subject_id,
-            }),
-        )
-        .await
-        .map(|Json(response)| response)
-        .map_err(ApiError::into_repository_api_error)
+        request: server_api::SubjektivSubjectDeleteRequest,
+    ) -> std::result::Result<
+        server_api::SubjektivSubjectDeleteResponse,
+        server_api::RepositoryApiError,
+    > {
+        let api = self.workspace_api()?.clone();
+        let actor = subject_authorization::administration_actor(&context)
+            .map_err(ApiError::into_repository_api_error)?;
+        require_workspace_owner(&api, &workspace_id, actor, "Subject deletion")
+            .await
+            .map_err(ApiError::into_repository_api_error)?;
+        subjektiv_deletion::delete(api, workspace_id, subject_id, request)
+            .await
+            .map_err(ApiError::into_repository_api_error)
     }
 
     async fn subjektiv_stage_candidate(
@@ -22674,7 +22745,9 @@ fn subjektiv_subject_response(
         memory_fingerprint,
         state: match subject.state {
             crate::subjektiv::SubjectState::Active => server_api::SubjektivSubjectState::Active,
-            crate::subjektiv::SubjectState::Retired => server_api::SubjektivSubjectState::Retired,
+            crate::subjektiv::SubjectState::LegacyRetired => {
+                server_api::SubjektivSubjectState::LegacyRetired
+            }
         },
         created_at: subject.created_at,
         updated_at: subject.updated_at,
@@ -22962,24 +23035,6 @@ async fn scoped_list_subjektiv_memory_changes(
         .await
 }
 
-async fn scoped_retire_subjektiv_subject(
-    State(api): State<WorkspaceApi>,
-    AxumPath(path): AxumPath<ScopedSubjektivSubjectPath>,
-) -> ApiResult<Json<server_api::SubjektivSubjectResponse>> {
-    api.host_executors
-        .host()?
-        .run(move || {
-            validate_workspace_scope(&api, &path.workspace_id)?;
-            let subject = open_subjektiv_store(&api)?
-                .retire_subject(&path.subject_id)
-                .map_err(subjektiv_store_error)?;
-            // Retirement deliberately does not stop or remove the current Worker. The
-            // Worker lease and subject lifecycle are independent authorities.
-            Ok(Json(subjektiv_subject_response(&api, subject)?))
-        })
-        .await
-}
-
 async fn scoped_stage_subjektiv_candidate(
     State(api): State<WorkspaceApi>,
     AxumPath(path): AxumPath<ScopedWorkspacePath>,
@@ -24564,6 +24619,7 @@ fn subjektiv_store_error(error: crate::subjektiv::SubjektivError) -> Error {
             Error::WorkspacePermissionDenied(error.to_string())
         }
         crate::subjektiv::SubjektivError::SubjectPermissionsConflict(_)
+        | crate::subjektiv::SubjektivError::SubjectDeletionConflict(_)
         | crate::subjektiv::SubjektivError::PermissionOperationConflict(_)
         | crate::subjektiv::SubjektivError::WorkerExecutionGrantConflict(_) => {
             Error::RepositoryConflict(error.to_string())
@@ -31543,6 +31599,7 @@ async fn workspace_response(
             manage_secrets: is_owner,
             manage_runtimes: is_owner,
             delete_workspace: is_owner,
+            delete_subjects: is_owner,
         },
         extension_points: WorkspaceExtensionPoints {
             store: "sqlite".to_string(),
@@ -37777,6 +37834,7 @@ mod tests {
     mod restore_workdir_tests;
     mod restored_parent_control_tests;
     mod subject_authorization_tests;
+    mod subject_deletion_tests;
     mod subject_spawn_tests;
     mod subjektiv_jobs_tests;
     mod subjektiv_journal_tests;
@@ -46241,7 +46299,13 @@ mod tests {
         let retired = store
             .create_subject(crate::subjektiv::SubjectRole::new("retired").unwrap())
             .unwrap();
-        store.retire_subject(&retired.id).unwrap();
+        // Frozen lifecycle fixture: migration preserves old inactive Subjects; there is
+        // intentionally no public operation that creates this historical state anymore.
+        api.feature_storage.open(&api.subjektiv_registration).unwrap()
+            .try_transaction::<_, feature_storage::FeatureStorageError>(|tx| {
+                tx.execute("UPDATE subjects SET state='retired', record_json=json_set(record_json,'$.state','retired') WHERE subject_id=?1", [&retired.id])?;
+                Ok(())
+            }).unwrap();
 
         let request = |subject_id: Option<&str>, profile: &str, singleton_key: Option<&str>| {
             CreateWorkspaceWorkerRequest {
@@ -48843,6 +48907,7 @@ mod tests {
         >,
         materializer: worker_runtime::working_directory::RuntimeGitMaterializer,
         spawn_failure: std::sync::Mutex<Option<String>>,
+        subject_delete_failure: std::sync::Mutex<Option<String>>,
         recovery_failure: std::sync::Mutex<Option<String>>,
         recovery_requests: std::sync::Mutex<Vec<runtime_api::SubjectCreateRecoveryRequest>>,
         recovery_hook: std::sync::Mutex<Option<Box<dyn FnOnce() + Send>>>,
@@ -48887,6 +48952,7 @@ mod tests {
                     std::env::temp_dir().join(unique),
                 ),
                 spawn_failure: std::sync::Mutex::new(None),
+                subject_delete_failure: std::sync::Mutex::new(None),
                 recovery_failure: std::sync::Mutex::new(None),
                 recovery_requests: std::sync::Mutex::new(Vec::new()),
                 recovery_hook: std::sync::Mutex::new(None),
@@ -49242,6 +49308,24 @@ mod tests {
                 .map(|execution| execution.snapshot())
         }
 
+        fn preflight_subject_delete_worker(
+            &self,
+            _request: &runtime_api::SubjectDeleteWorkerRequest,
+        ) -> std::result::Result<(), String> {
+            Ok(())
+        }
+
+        fn subject_delete_worker(
+            &self,
+            request: &runtime_api::SubjectDeleteWorkerRequest,
+        ) -> std::result::Result<(), String> {
+            if let Some(message) = self.subject_delete_failure.lock().unwrap().clone() {
+                return Err(message);
+            }
+            self.stop_worker(&worker_runtime::identity::WorkerRef::new(request.worker_id));
+            Ok(())
+        }
+
         fn stop_worker(
             &self,
             worker_ref: &worker_runtime::identity::WorkerRef,

crates/workspace-server/src/server/subject_authorization.rs

@@ -149,6 +149,13 @@ pub(super) fn worker_permissions(
     api: &WorkspaceApi,
     worker: &RuntimeWorkerRef,
 ) -> ApiResult<Option<Vec<ScopedPermission>>> {
+    if subjektiv_deletion::deleting_worker(api, worker)?
+        || open_subjektiv_store(api)?
+            .worker_subject_deleted(&worker.runtime_id, &worker.worker_id)
+            .map_err(subjektiv_store_error)?
+    {
+        return Err(denied("Worker belonged to an explicitly deleted Subject"));
+    }
     if let Some(grant) = live_child_grant(api, worker)? {
         return Ok(Some(grant.permissions));
     }
@@ -226,6 +233,8 @@ pub(super) fn prepare_delegation(
     singleton_key: Option<&str>,
     subject_connection: bool,
 ) -> ApiResult<Option<WorkerExecutionGrant>> {
+    // A deleted grant must never become an ordinary non-Subject delegation source.
+    worker_permissions(api, source)?;
     let child = live_child_grant(api, source)?;
     let body = if child.is_none() {
         current_body_subject(api, source)?

crates/workspace-server/src/server/subjektiv_deletion.rs

@@ -0,0 +1,288 @@
+//! Explicit Subject destruction is independent of ordinary Worker retention. The domain
+//! fence commits before external effects, remains after failures, and rejects cached grants.
+//! Worker originals are archived; Job execution copies are purged. Existing archives, Workdirs,
+//! Tickets and other Subjects are not erased. Archive contents can include previously injected
+//! Memory: their independent retention/access policy still applies. This is logical content
+//! deletion, not a promise to erase backups, external providers or already exported material.
+//!
+//! Child removal/create-fence receipts, not acceptance, Idle or missing projections, prove
+//! quiescence. A retry carries the same scope/Subject/operation; no new child identity is issued.
+//! The domain receipt is authoritative completion. Backend inventories retain only identifiers
+//! needed for cleanup and fail-closed authorization, never a copy of Subject content.
+use super::*;
+use rusqlite::params;
+
+pub(super) fn job_subject(request: &BackendJobRequest) -> Option<&str> {
+    request
+        .grants
+        .subjektiv_journal
+        .as_ref()
+        .map(|g| g.subject_id.as_str())
+        .or_else(|| {
+            request
+                .grants
+                .subjektiv_consolidation
+                .as_ref()
+                .map(|g| g.subject_id.as_str())
+        })
+}
+
+pub(super) fn require_available(api: &WorkspaceApi, subject: &str) -> Result<()> {
+    let store = open_subjektiv_store(api).map_err(|error| error.error)?;
+    if store
+        .subject(subject)
+        .map_err(|e| Error::Store(e.to_string()))?
+        .is_none()
+    {
+        return Err(Error::SubjektivSubjectNotFound(subject.into()));
+    }
+    Ok(())
+}
+
+pub(super) fn pending(api: &WorkspaceApi, subject: &str) -> Result<bool> {
+    api.config_store.with_conn(|connection| {
+        Ok(connection.query_row(
+            "SELECT EXISTS(SELECT 1 FROM subject_deletions WHERE workspace_id=?1 AND subject_id=?2)",
+            params![api.workspace_id(), subject], |row| row.get(0),
+        )?)
+    })
+}
+
+/// This is internal cleanup evidence, never a user-supplied removal flag. It exists only
+/// after the independently durable domain fence and exact-target inventory commit.
+pub(super) fn deleting_worker(api: &WorkspaceApi, worker: &RuntimeWorkerRef) -> Result<bool> {
+    api.config_store.with_conn(|connection| {
+        Ok(connection.query_row(
+            "SELECT EXISTS(SELECT 1 FROM subject_deletion_workers WHERE workspace_id=?1 AND runtime_id=?2 AND worker_id=?3)",
+            params![api.workspace_id(), worker.runtime_id, worker.worker_id], |row| row.get(0),
+        )?)
+    })
+}
+
+pub(super) async fn delete(
+    api: WorkspaceApi,
+    workspace: String,
+    subject: String,
+    request: server_api::SubjektivSubjectDeleteRequest,
+) -> ApiResult<server_api::SubjektivSubjectDeleteResponse> {
+    let handle = tokio::runtime::Handle::current();
+    api.host_executors
+        .host()?
+        .run(move || {
+            validate_workspace_scope(&api, &workspace)?;
+            handle.block_on(resume(&api, &subject, &request.operation_id))
+        })
+        .await
+}
+
+pub(super) async fn recover(api: &WorkspaceApi) -> Result<()> {
+    let pending = open_subjektiv_store(api)
+        .map_err(|error| error.error)?
+        .pending_subject_deletions()
+        .map_err(|e| Error::Store(e.to_string()))?;
+    for deletion in pending {
+        if let Err(error) = resume(api, &deletion.subject_id, &deletion.operation_id).await {
+            tracing::warn!(%error.error, subject_id=%deletion.subject_id,
+                "Subject deletion restart recovery remains incomplete; same request can resume");
+        }
+    }
+    Ok(())
+}
+
+async fn resume(
+    api: &WorkspaceApi,
+    subject: &str,
+    operation: &str,
+) -> ApiResult<server_api::SubjektivSubjectDeleteResponse> {
+    let store = open_subjektiv_store(api)?;
+    let gate = subjektiv_journal::lifecycle_lock(api, subject)?;
+    let receipt = {
+        let _guard = gate
+            .lock()
+            .map_err(|_| Error::Store("Subject lifecycle lock poisoned".into()))?;
+        let receipt = store
+            .begin_subject_deletion(subject, operation)
+            .map_err(subjektiv_store_error)?;
+        if !receipt.completed {
+            let delegated = store
+                .deletion_subject_workers(subject)
+                .map_err(subjektiv_store_error)?
+                .into_iter()
+                .map(|(runtime, worker)| RuntimeWorkerRef::new(runtime, worker))
+                .collect::<Vec<_>>();
+            api.config_store.prepare_subject_deletion(
+                api.workspace_id(),
+                subject,
+                operation,
+                &delegated,
+            )?;
+        }
+        receipt
+    };
+    let response = |completed| server_api::SubjektivSubjectDeleteResponse {
+        subject_id: subject.into(),
+        operation_id: operation.into(),
+        completed,
+    };
+    if receipt.completed {
+        return Ok(response(true));
+    }
+    // Never hold the Host callback gate across a Runtime call. A create/restore can be
+    // waiting for the callback that now has to reject this permanently fenced Subject.
+    let workers =
+        api.config_store
+            .list_subject_deletion_workers(api.workspace_id(), subject, operation)?;
+    for (worker, _is_job) in workers {
+        if let Err(error) = remove_worker(api, subject, operation, &worker).await {
+            tracing::warn!(%error.error, subject_id=subject, operation_id=operation, "Subject deletion remains incomplete; exact retry required");
+            return Ok(response(false));
+        }
+    }
+    {
+        let _guard = gate
+            .lock()
+            .map_err(|_| Error::Store("Subject lifecycle lock poisoned".into()))?;
+        api.config_store
+            .erase_subject_deleted_jobs(api.workspace_id(), subject, operation)?;
+        // Finish Backend cleanup before the authoritative domain receipt. If domain
+        // purge fails, its separately committed fence and pending operation survive.
+        // No retry can report domain completion while occupancy/Job cleanup is unproven.
+        api.config_store
+            .finish_subject_deletion_record(api.workspace_id(), subject, operation)?;
+        store
+            .finish_subject_deletion(subject, operation)
+            .map_err(subjektiv_store_error)?;
+    }
+    Ok(response(true))
+}
+
+async fn remove_worker(
+    api: &WorkspaceApi,
+    subject: &str,
+    operation: &str,
+    worker: &RuntimeWorkerRef,
+) -> ApiResult<()> {
+    let request = api.config_store.subject_deletion_worker_request(
+        api.workspace_id(),
+        subject,
+        operation,
+        worker,
+    )?;
+    let fence = api
+        .runtime
+        .subject_delete_worker(&worker.runtime_id, request.clone())
+        .map_err(RuntimeRegistryError::into_error)?;
+    if fence.workspace_id != request.workspace_id
+        || fence.worker_id != request.worker_id
+        || fence.create_fingerprint != request.create_fingerprint
+        || fence.operation_id != request.operation_id
+    {
+        return Err(Error::RepositoryConflict(
+            "Subject Worker deletion fence receipt mismatch".into(),
+        )
+        .into());
+    }
+    // Replay the canonical child even when physical removal already happened:
+    // its retained receipt can finish the Backend catalog midpoint. The Runtime
+    // fence above also prevents an older create from arriving after that removal.
+    if api
+        .config_store
+        .recover_worker_removal_execution(api.workspace_id(), worker)
+        .map_err(|error| Error::Store(error.to_string()))?
+        .is_some()
+    {
+        return execute_removal(api, operation, worker).await;
+    }
+    match api.runtime.worker(worker) {
+        Ok(detail) => {
+            if !detail.state.eq_ignore_ascii_case("stopped") {
+                let stopped = api
+                    .runtime
+                    .stop_worker(
+                        worker,
+                        WorkerLifecycleRequest {
+                            reason: Some(format!("Explicit Subject deletion {operation}")),
+                            ticket_assignment: None,
+                        },
+                    )
+                    .map_err(RuntimeRegistryError::into_error)?;
+                if stopped.state != InternalWorkerOperationState::Accepted {
+                    return Err(Error::RepositoryConflict(
+                        "Subject Worker stop was not accepted".into(),
+                    )
+                    .into());
+                }
+            }
+            let actual = api
+                .runtime
+                .worker(worker)
+                .map_err(RuntimeRegistryError::into_error)?;
+            if !actual.state.eq_ignore_ascii_case("stopped") {
+                return Err(
+                    Error::RepositoryConflict("Subject Worker stop is unconfirmed".into()).into(),
+                );
+            }
+            if api
+                .store
+                .get_worker_registry(api.workspace_id(), worker)?
+                .is_none()
+            {
+                // The Runtime fence authenticated this exact reserved fingerprint. A create
+                // can have reached Runtime before its Backend publication failed. Publish
+                // only its stopped record so the normal archive/Purge owner can remove it.
+                record_worker_summary(
+                    api,
+                    &actual,
+                    &actual.display_name,
+                    actual.profile.clone(),
+                    WorkerRegistryDisplayNamePolicy::PreserveExisting,
+                )?;
+            }
+        }
+        Err(RuntimeRegistryError::UnknownWorker { .. }) => {
+            if api
+                .store
+                .get_worker_registry(api.workspace_id(), worker)?
+                .is_some()
+            {
+                return Err(Error::RepositoryConflict(
+                    "Runtime object missing before canonical original archival".into(),
+                )
+                .into());
+            }
+            api.config_store.confirm_subject_deletion_absence(
+                api.workspace_id(),
+                subject,
+                operation,
+                worker,
+                &fence,
+            )?;
+            return Ok(());
+        }
+        Err(error) => return Err(error.into_error().into()),
+    }
+    execute_removal(api, operation, worker).await
+}
+
+async fn execute_removal(
+    api: &WorkspaceApi,
+    operation: &str,
+    worker: &RuntimeWorkerRef,
+) -> ApiResult<()> {
+    let response = WorkerRemovalService::new(api)
+        .execute_target_removal_on_host(
+            api.runtime.as_ref(),
+            worker,
+            &format!("Explicit Subject deletion {operation}"),
+            None,
+        )
+        .await
+        .map_err(Error::Store)?;
+    if response.status != StatusCode::OK.as_u16() {
+        return Err(Error::RepositoryConflict(
+            "Subject Worker archival/Purge remains unconfirmed".into(),
+        )
+        .into());
+    }
+    Ok(())
+}

crates/workspace-server/src/server/subjektiv_journal.rs

@@ -446,6 +446,7 @@ pub(super) fn bind_host_session(
 /// Runs under the same Subject gate as final revoke/singleton release. A failed create or
 /// legacy removal may have released its Backend reservation but cannot hide a durable writer.
 pub(super) fn check_start_allowed(api: &WorkspaceApi, subject: &str) -> Result<()> {
+    subjektiv_deletion::require_available(api, subject)?;
     let store = store(api)?;
     let key = crate::subjektiv::subject_worker_singleton_key(subject)
         .map_err(|e| Error::InvalidInput(e.to_string()))?;
@@ -1747,6 +1748,13 @@ pub(super) fn prepare_worker_removal(
     runtime: &RuntimeRegistry,
     target: &RuntimeWorkerRef,
 ) -> Result<Option<crate::retention::ErasedJournalSession>> {
+    if let Some(api) = service.journal_dispatch_api.upgrade()
+        && subjektiv_deletion::deleting_worker(&api, target)?
+    {
+        // Full Subject deletion has a permanent domain fence. It deliberately drops
+        // Journal continuity, but retains source originals through its archive policy.
+        return Ok(None);
+    }
     let Some(attr) = removal_attribution(service, target)? else {
         if service
             .store
@@ -1809,6 +1817,13 @@ pub(super) fn erased_archive_removal_proof(
     target: &RuntimeWorkerRef,
     prepared: &crate::retention::PreparedWorkerRemoval,
 ) -> Result<Option<crate::retention::RuntimeJournalErasureAck>> {
+    if let Some(api) = service.journal_dispatch_api.upgrade()
+        && subjektiv_deletion::deleting_worker(&api, target)?
+    {
+        // Resume the exact canonical retention request after full Subject fencing.
+        // Subject deletion retains originals; it is not per-Session source erasure.
+        return Ok(None);
+    }
     let Some(attr) = removal_attribution(service, target)? else {
         return Ok(None);
     };
@@ -1852,6 +1867,13 @@ pub(super) fn validate_removal_retention(
     target: &RuntimeWorkerRef,
     prepared: &crate::retention::PreparedWorkerRemoval,
 ) -> Result<()> {
+    if let Some(api) = service.journal_dispatch_api.upgrade()
+        && subjektiv_deletion::deleting_worker(&api, target)?
+    {
+        // The plan-local retention policy and canonical Runtime receipt remain required.
+        // Neither unfinished Journals nor a stopped old Controller are deletion blockers.
+        return Ok(());
+    }
     let Some(attr) = removal_attribution(service, target)? else {
         if service
             .store
@@ -2066,6 +2088,9 @@ pub(super) fn session_erased(api: &WorkspaceApi, request: &BackendJobRequest) ->
     let Some(grant) = &request.grants.subjektiv_journal else {
         return Ok(false);
     };
+    if subjektiv_deletion::pending(api, &grant.subject_id)? {
+        return Ok(true);
+    }
     let store = store(api)?;
     store
         .journal_session_erased(&host(api, &store, grant)?)

crates/workspace-server/src/server/tests/subject_deletion_tests.rs

@@ -0,0 +1,729 @@
+//! Real router/authentication, feature store and Backend DB boundaries. Runtime
+//! execution/unknown and restart fences are covered in worker-runtime and the
+//! canonical removal suites, rather than claiming HTTP acceptance proves shutdown.
+use super::*;
+
+async fn delete_request(
+    api: &WorkspaceApi,
+    subject: &str,
+    key: &str,
+    token: Option<&str>,
+    workspace: &str,
+) -> (StatusCode, Value) {
+    let mut builder = Request::builder()
+        .method("DELETE")
+        .uri(format!("/api/w/{workspace}/subjektiv/subjects/{subject}"))
+        .header(CONTENT_TYPE, "application/json");
+    if let Some(token) = token {
+        builder = builder.header("authorization", format!("Bearer {token}"));
+    }
+    let response = build_router(api.clone())
+        .oneshot(
+            builder
+                .body(Body::from(json!({"operation_id":key}).to_string()))
+                .unwrap(),
+        )
+        .await
+        .unwrap();
+    let status = response.status();
+    let bytes = to_bytes(response.into_body(), 2 * 1024 * 1024)
+        .await
+        .unwrap();
+    let body = serde_json::from_slice(&bytes)
+        .unwrap_or_else(|_| json!({"text":String::from_utf8_lossy(&bytes)}));
+    (status, body)
+}
+
+#[tokio::test]
+async fn deletion_owner_scope_exact_retry_and_subject_isolation() {
+    let dir = tempfile::tempdir().unwrap();
+    let api = test_api(dir.path()).await;
+    let store = open_subjektiv_store(&api).unwrap();
+    let subject = store
+        .create_subject_with_behavior(
+            crate::subjektiv::SubjectRole::new("delete me").unwrap(),
+            "private behavior".into(),
+        )
+        .unwrap();
+    let other = store
+        .create_subject_with_behavior(
+            crate::subjektiv::SubjectRole::new("keep me").unwrap(),
+            "unchanged".into(),
+        )
+        .unwrap();
+    let owner = seed_test_workspace_owner_token(api.store.as_ref(), "subject-delete-owner").await;
+    let stranger = seed_test_api_token(api.store.as_ref(), "subject-delete-stranger");
+    for (token, workspace, expected) in [
+        (None, TEST_WORKSPACE_ID, StatusCode::UNAUTHORIZED),
+        (
+            Some(stranger.as_str()),
+            TEST_WORKSPACE_ID,
+            StatusCode::FORBIDDEN,
+        ),
+        (
+            Some(owner.as_str()),
+            "another-workspace",
+            StatusCode::NOT_FOUND,
+        ),
+    ] {
+        let (status, body) =
+            delete_request(&api, &subject.id, "same-operation", token, workspace).await;
+        assert_eq!(status, expected, "{body}");
+        assert!(store.subject(&subject.id).unwrap().is_some());
+    }
+    let (status, body) = delete_request(
+        &api,
+        &subject.id,
+        "same-operation",
+        Some(&owner),
+        TEST_WORKSPACE_ID,
+    )
+    .await;
+    assert_eq!(status, StatusCode::OK, "{body}");
+    assert_eq!(body["completed"], true);
+    assert!(store.subject(&subject.id).unwrap().is_none());
+    assert_eq!(
+        store.subject(&other.id).unwrap().unwrap().behavior_md,
+        "unchanged"
+    );
+    assert_eq!(store.list_subjects(100).unwrap().items.len(), 1);
+    let (status, replay) = delete_request(
+        &api,
+        &subject.id,
+        "same-operation",
+        Some(&owner),
+        TEST_WORKSPACE_ID,
+    )
+    .await;
+    assert_eq!(status, StatusCode::OK, "{replay}");
+    assert_eq!(replay, body);
+    let (status, _) = delete_request(
+        &api,
+        &subject.id,
+        "different-operation",
+        Some(&owner),
+        TEST_WORKSPACE_ID,
+    )
+    .await;
+    assert_eq!(status, StatusCode::CONFLICT);
+    let (status, _) = delete_request(
+        &api,
+        &other.id,
+        "same-operation",
+        Some(&owner),
+        TEST_WORKSPACE_ID,
+    )
+    .await;
+    assert_eq!(status, StatusCode::CONFLICT);
+    assert!(store.subject(&other.id).unwrap().is_some());
+    let fresh = store
+        .create_subject(crate::subjektiv::SubjectRole::new("fresh").unwrap())
+        .unwrap();
+    assert_ne!(fresh.id, subject.id);
+    assert!(store.subject_permissions(&fresh.id).unwrap().is_none());
+    assert_eq!(
+        store
+            .pending_staging_candidates(&fresh.id, 100)
+            .unwrap()
+            .len(),
+        0
+    );
+}
+
+#[tokio::test]
+async fn legacy_inactive_subject_is_preserved_until_explicit_delete_and_retire_route_is_gone() {
+    let dir = tempfile::tempdir().unwrap();
+    let api = test_api(dir.path()).await;
+    let store = open_subjektiv_store(&api).unwrap();
+    let subject = store
+        .create_subject_with_behavior(
+            crate::subjektiv::SubjectRole::new("legacy fixture").unwrap(),
+            "retained original".into(),
+        )
+        .unwrap();
+    api.feature_storage.open(&api.subjektiv_registration).unwrap()
+        .try_transaction::<_, feature_storage::FeatureStorageError>(|tx| {
+            tx.execute("UPDATE subjects SET state='retired',record_json=json_set(record_json,'$.state','retired') WHERE subject_id=?1", [&subject.id])?;
+            Ok(())
+        }).unwrap();
+    assert_eq!(
+        store.subject(&subject.id).unwrap().unwrap().state,
+        crate::subjektiv::SubjectState::LegacyRetired
+    );
+    let owner = seed_test_workspace_owner_token(api.store.as_ref(), "subject-delete-legacy").await;
+    let request = Request::builder()
+        .method("POST")
+        .uri(format!(
+            "/api/w/{TEST_WORKSPACE_ID}/subjektiv/subjects/{}/retire",
+            subject.id
+        ))
+        .header("authorization", format!("Bearer {owner}"))
+        .body(Body::empty())
+        .unwrap();
+    let old = build_router(api.clone()).oneshot(request).await.unwrap();
+    assert_eq!(old.status(), StatusCode::METHOD_NOT_ALLOWED);
+    assert_eq!(
+        store.subject(&subject.id).unwrap().unwrap().behavior_md,
+        "retained original"
+    );
+    let (status, body) = delete_request(
+        &api,
+        &subject.id,
+        "explicit-legacy-delete",
+        Some(&owner),
+        TEST_WORKSPACE_ID,
+    )
+    .await;
+    assert_eq!(status, StatusCode::OK, "{body}");
+    assert_eq!(body["completed"], true);
+}
+
+#[tokio::test(flavor = "multi_thread", worker_threads = 4)]
+async fn unconfirmed_worker_shutdown_is_not_completion_and_exact_retry_converges() {
+    let dir = tempfile::tempdir().unwrap();
+    init_clean_git_workspace(dir.path());
+    let (api, execution) = test_api_with_recording_backend(dir.path()).await;
+    let store = open_subjektiv_store(&api).unwrap();
+    let subject = store
+        .create_subject_with_behavior(
+            crate::subjektiv::SubjectRole::new("delete connected body").unwrap(),
+            "private behavior".into(),
+        )
+        .unwrap();
+    let Json(created) = create_workspace_worker(
+        State(api.clone()),
+        HeaderMap::new(),
+        Json(CreateWorkspaceWorkerRequest {
+            runtime_id: EMBEDDED_WORKER_RUNTIME_ID.into(),
+            display_name: "Subject deletion boundary".into(),
+            singleton_key: None,
+            profile: Some("builtin:companion".into()),
+            ticket_assignment: None,
+            initial_submit: vec![],
+            workdir_attachments: vec![],
+            feature_connections: server_api::WorkspaceWorkerFeatureConnectionsRequest {
+                subjektiv: Some(server_api::SubjektivWorkerConnectionRequest {
+                    subject_id: subject.id.clone(),
+                }),
+            },
+            control_operation_id: None,
+            execution_grant: None,
+        }),
+    )
+    .await
+    .unwrap();
+    let worker = RuntimeWorkerRef::new(created.runtime_id, created.worker_id);
+    seed_worker_session_for_cleanup(dir.path(), &worker);
+    let owner = seed_test_workspace_owner_token(api.store.as_ref(), "subject-delete-unknown").await;
+    *execution.subject_delete_failure.lock().unwrap() = Some("shutdown completion unknown".into());
+    let (status, body) = delete_request(
+        &api,
+        &subject.id,
+        "unknown-delete",
+        Some(&owner),
+        TEST_WORKSPACE_ID,
+    )
+    .await;
+    assert_eq!(status, StatusCode::OK, "{body}");
+    assert_eq!(body["completed"], false);
+    assert!(store.subject(&subject.id).unwrap().is_none());
+    assert!(
+        !store
+            .subject_deletion(&subject.id)
+            .unwrap()
+            .unwrap()
+            .completed
+    );
+    assert!(subject_authorization::worker_permissions(&api, &worker).is_err());
+    assert!(
+        api.store
+            .current_worker_singleton_owner(TEST_WORKSPACE_ID, &format!("subjektiv:{}", subject.id))
+            .unwrap()
+            .is_some()
+    );
+    *execution.subject_delete_failure.lock().unwrap() = None;
+    api.config_store.with_conn(|conn| {
+        conn.execute_batch("CREATE TRIGGER injected_worker_catalog_failure BEFORE DELETE ON worker_registry BEGIN SELECT RAISE(ABORT,'injected catalog failure'); END;")?;
+        Ok(())
+    }).unwrap();
+    let (status, midpoint) = delete_request(
+        &api,
+        &subject.id,
+        "unknown-delete",
+        Some(&owner),
+        TEST_WORKSPACE_ID,
+    )
+    .await;
+    assert_eq!(status, StatusCode::OK, "{midpoint}");
+    assert_eq!(midpoint["completed"], false);
+    assert!(matches!(
+        api.runtime.worker(&worker),
+        Err(RuntimeRegistryError::UnknownWorker { .. })
+    ));
+    assert!(
+        api.store
+            .get_worker_registry(TEST_WORKSPACE_ID, &worker)
+            .unwrap()
+            .is_some()
+    );
+    api.config_store
+        .with_conn(|conn| {
+            conn.execute_batch("DROP TRIGGER injected_worker_catalog_failure;")?;
+            Ok(())
+        })
+        .unwrap();
+    let (status, body) = delete_request(
+        &api,
+        &subject.id,
+        "unknown-delete",
+        Some(&owner),
+        TEST_WORKSPACE_ID,
+    )
+    .await;
+    assert_eq!(status, StatusCode::OK, "{body}");
+    assert_eq!(body["completed"], true, "{body}");
+    assert!(
+        api.store
+            .current_worker_singleton_owner(TEST_WORKSPACE_ID, &format!("subjektiv:{}", subject.id))
+            .unwrap()
+            .is_none()
+    );
+    let removal = api
+        .config_store
+        .recover_worker_removal_execution(TEST_WORKSPACE_ID, &worker)
+        .unwrap()
+        .unwrap();
+    assert_eq!(
+        removal.plan.state,
+        crate::retention::WorkerRemovalPlanState::Succeeded
+    );
+    assert_eq!(
+        removal.runtime_request.session_disposition,
+        worker_runtime::retention::SessionDisposition::Archive
+    );
+    assert!(
+        store
+            .subject_deletion(&subject.id)
+            .unwrap()
+            .unwrap()
+            .completed
+    );
+}
+
+#[tokio::test]
+async fn captured_subject_job_result_cannot_deliver_after_domain_fence() {
+    let dir = tempfile::tempdir().unwrap();
+    let (api, execution) = test_api_with_recording_backend(dir.path()).await;
+    let store = open_subjektiv_store(&api).unwrap();
+    let subject = store
+        .create_subject(crate::subjektiv::SubjectRole::new("notification fence").unwrap())
+        .unwrap();
+    let target = spawn_ticket_check_source(&api, "subject-notification-target");
+    let worker = spawn_ticket_check_source(&api, "subject-notification-result");
+    let request = BackendJobRequest {
+        job_id: "captured-subject-notification".into(),
+        purpose: "subject_notification_contract".into(),
+        input_ref: "subject:notification".into(),
+        input: json!({"private":"input"}),
+        instruction: "Read input".into(),
+        profile: "builtin:backend-job".into(),
+        grants: crate::backend_job::BackendJobGrants {
+            subjektiv_consolidation: Some(crate::backend_job::SubjektivConsolidationGrant {
+                subject_id: subject.id.clone(),
+                candidate_ids: vec!["candidate".into()],
+            }),
+            ..Default::default()
+        },
+        serialization_key: None,
+        source_worker: Some(target.clone()),
+        notification_target: Some(target),
+        limits: Default::default(),
+    };
+    // Enter at the committed result boundary: execution/result validation is
+    // outside this notification test, but routing and Runtime transport are real.
+    let now = Utc::now().to_rfc3339();
+    let reserved = api
+        .store
+        .reserve_backend_job(TEST_WORKSPACE_ID, &request, &now)
+        .unwrap();
+    let attempt = &reserved.attempt.attempt_id;
+    api.store
+        .claim_backend_job_attempt_dispatch(TEST_WORKSPACE_ID, &request.job_id, attempt, &now)
+        .unwrap();
+    api.store
+        .bind_backend_job_attempt_worker(
+            TEST_WORKSPACE_ID,
+            &request.job_id,
+            attempt,
+            &worker,
+            Some("run"),
+            &now,
+        )
+        .unwrap();
+    let captured = api
+        .store
+        .accept_backend_job_result(
+            TEST_WORKSPACE_ID,
+            &worker,
+            &BackendJobResultSubmission {
+                job_id: request.job_id.clone(),
+                attempt_id: attempt.clone(),
+                input_digest: request.input_digest().unwrap(),
+                result: json!({"private":"result"}),
+            },
+            &now,
+        )
+        .unwrap();
+    let delivery = crate::backend_job::delivery_id(&request.job_id, attempt);
+    assert!(
+        api.store
+            .job_notification_source(TEST_WORKSPACE_ID, &request.job_id, attempt)
+            .is_ok()
+    );
+    execution.take_inputs();
+    store
+        .begin_subject_deletion(&subject.id, "notification-delete")
+        .unwrap();
+    notification_delivery::deliver_job_result(&api, &captured);
+    notification_delivery::recover_job_notifications(&api);
+    assert!(
+        execution.take_inputs().is_empty(),
+        "captured or recovered result must not escape the domain fence"
+    );
+    assert!(
+        api.store
+            .job_notification_request(TEST_WORKSPACE_ID, &delivery)
+            .unwrap()
+            .is_none()
+    );
+}
+
+#[tokio::test]
+async fn domain_purge_failure_keeps_fence_and_backend_reopen_resumes_exact_operation() {
+    let dir = tempfile::tempdir().unwrap();
+    let api = test_api(dir.path()).await;
+    let store = open_subjektiv_store(&api).unwrap();
+    let subject = store
+        .create_subject_with_behavior(
+            crate::subjektiv::SubjectRole::new("retry purge").unwrap(),
+            "do not resurrect".into(),
+        )
+        .unwrap();
+    let other = store
+        .create_subject_with_behavior(
+            crate::subjektiv::SubjectRole::new("untouched").unwrap(),
+            "keep".into(),
+        )
+        .unwrap();
+    let database = api
+        .feature_storage
+        .open(&api.subjektiv_registration)
+        .unwrap();
+    database.try_transaction::<_, feature_storage::FeatureStorageError>(|tx| {
+        tx.execute_batch("CREATE TRIGGER injected_subject_purge_failure BEFORE DELETE ON subjects BEGIN SELECT RAISE(ABORT,'injected domain purge failure'); END;")?;
+        Ok(())
+    }).unwrap();
+    let owner =
+        seed_test_workspace_owner_token(api.store.as_ref(), "subject-delete-purge-failure").await;
+    let (status, body) = delete_request(
+        &api,
+        &subject.id,
+        "purge-retry",
+        Some(&owner),
+        TEST_WORKSPACE_ID,
+    )
+    .await;
+    assert!(status.is_server_error(), "{status}: {body}");
+    assert!(
+        !store
+            .subject_deletion(&subject.id)
+            .unwrap()
+            .unwrap()
+            .completed
+    );
+    assert!(store.subject(&subject.id).unwrap().is_none());
+    assert_eq!(
+        store.subject(&other.id).unwrap().unwrap().behavior_md,
+        "keep"
+    );
+    database
+        .try_transaction::<_, feature_storage::FeatureStorageError>(|tx| {
+            tx.execute_batch("DROP TRIGGER injected_subject_purge_failure;")?;
+            Ok(())
+        })
+        .unwrap();
+    let mut reopened = api.clone();
+    let config_store =
+        Arc::new(SqliteWorkspaceStore::open_for_test(&api.config.database_path).unwrap());
+    reopened.config_store = config_store.clone();
+    reopened.store = config_store;
+    let recovery_api = reopened.clone();
+    let handle = tokio::runtime::Handle::current();
+    reopened
+        .host_executors
+        .host()
+        .unwrap()
+        .run(move || handle.block_on(subjektiv_deletion::recover(&recovery_api)))
+        .await
+        .unwrap();
+    let recovered = open_subjektiv_store(&reopened)
+        .unwrap()
+        .subject_deletion(&subject.id)
+        .unwrap()
+        .unwrap();
+    assert_eq!(recovered.operation_id, "purge-retry");
+    assert!(recovered.completed);
+    let (status, body) = delete_request(
+        &reopened,
+        &subject.id,
+        "purge-retry",
+        Some(&owner),
+        TEST_WORKSPACE_ID,
+    )
+    .await;
+    assert_eq!(status, StatusCode::OK, "{body}");
+    assert_eq!(body["completed"], true);
+    assert_eq!(
+        store.subject(&other.id).unwrap().unwrap().behavior_md,
+        "keep"
+    );
+}
+
+#[tokio::test(flavor = "multi_thread", worker_threads = 4)]
+async fn pending_consolidation_is_purged_and_captured_dispatch_and_late_result_are_rejected() {
+    let dir = tempfile::tempdir().unwrap();
+    let (api, execution) = test_api_with_recording_backend(dir.path()).await;
+    let store = open_subjektiv_store(&api).unwrap();
+    let subject = store
+        .create_subject(crate::subjektiv::SubjectRole::new("delete running Job").unwrap())
+        .unwrap();
+    let candidate: memory::extract::StagingRecord = serde_json::from_value(json!({
+        "schema_version": 2, "id": "delete-job-candidate", "extract_run_id": "extract",
+        "source": {"segment_id":"segment", "range":[1,2]}, "kind":"constraint",
+        "claim":"private candidate marker", "why_useful":"retained only until explicit erasure",
+        "evidence": [], "source_refs": []
+    }))
+    .unwrap();
+    store
+        .stage_candidate(crate::subjektiv::SubjectStagingRecord::attach(
+            &subject.id,
+            candidate,
+        ))
+        .unwrap();
+    let started = start_subjektiv_staging_consolidation(
+        api.clone(),
+        &subject.id,
+        MemoryConsolidateStagingOperation { force: true },
+    )
+    .await
+    .unwrap();
+    assert_eq!(started.status, "started");
+    let job = api
+        .store
+        .find_active_backend_job_for_resource(
+            TEST_WORKSPACE_ID,
+            &crate::backend_job::subjektiv_serialization_key(&subject.id),
+        )
+        .unwrap()
+        .unwrap();
+    let attempt = api
+        .store
+        .get_backend_job_attempt(
+            TEST_WORKSPACE_ID,
+            &job.request.job_id,
+            &crate::backend_job::attempt_id(&job.request.job_id, job.current_attempt),
+        )
+        .unwrap()
+        .unwrap();
+    let worker = attempt.worker.clone().unwrap();
+    seed_worker_session_for_cleanup(dir.path(), &worker);
+    let captured = BackendJobReservation {
+        job: job.clone(),
+        attempt: attempt.clone(),
+        replayed: true,
+        resource_reused: false,
+    };
+    let owner =
+        seed_test_workspace_owner_token(api.store.as_ref(), "subject-delete-consolidation").await;
+    *execution.subject_delete_failure.lock().unwrap() = Some("completion unknown".into());
+    let (status, body) = delete_request(
+        &api,
+        &subject.id,
+        "delete-job",
+        Some(&owner),
+        TEST_WORKSPACE_ID,
+    )
+    .await;
+    assert_eq!(status, StatusCode::OK, "{body}");
+    assert_eq!(body["completed"], false);
+    assert!(
+        api.dispatch_backend_job_reservation(captured.clone())
+            .is_err()
+    );
+    assert!(
+        api.accept_backend_job_result(
+            &worker,
+            &BackendJobResultSubmission {
+                job_id: job.request.job_id.clone(),
+                attempt_id: attempt.attempt_id.clone(),
+                input_digest: job.input_digest.clone(),
+                result: json!({"late":true}),
+            }
+        )
+        .is_err()
+    );
+    *execution.subject_delete_failure.lock().unwrap() = None;
+    let (status, body) = delete_request(
+        &api,
+        &subject.id,
+        "delete-job",
+        Some(&owner),
+        TEST_WORKSPACE_ID,
+    )
+    .await;
+    assert_eq!(status, StatusCode::OK, "{body}");
+    assert_eq!(body["completed"], true);
+    assert!(
+        api.store
+            .get_backend_job(TEST_WORKSPACE_ID, &job.request.job_id)
+            .unwrap()
+            .is_none()
+    );
+    assert!(
+        api.store
+            .get_backend_job_attempt(TEST_WORKSPACE_ID, &job.request.job_id, &attempt.attempt_id)
+            .unwrap()
+            .is_none()
+    );
+    assert!(api.dispatch_backend_job_reservation(captured).is_err());
+    assert!(api.dispatch_backend_job(&job.request).is_err());
+    let removal = api
+        .config_store
+        .recover_worker_removal_execution(TEST_WORKSPACE_ID, &worker)
+        .unwrap()
+        .unwrap();
+    assert_eq!(
+        removal.plan.state,
+        crate::retention::WorkerRemovalPlanState::Succeeded
+    );
+    assert_eq!(
+        removal.runtime_request.session_disposition,
+        worker_runtime::retention::SessionDisposition::Purge
+    );
+    assert_eq!(
+        removal.runtime_request.diagnostics_disposition,
+        worker_runtime::retention::DiagnosticsDisposition::Purge
+    );
+    assert!(
+        !dir.path()
+            .join(".test-embedded-runtime-store/workers")
+            .join(&worker.worker_id)
+            .exists()
+    );
+}
+
+#[tokio::test]
+async fn unmaterialized_body_and_job_reservations_finish_only_with_runtime_storage_absence_proof() {
+    let dir = tempfile::tempdir().unwrap();
+    let (api, _) = test_api_with_recording_backend(dir.path()).await;
+    let store = open_subjektiv_store(&api).unwrap();
+    let owner =
+        seed_test_workspace_owner_token(api.store.as_ref(), "subject-delete-unmaterialized").await;
+    for is_job in [false, true] {
+        let subject = store
+            .create_subject(crate::subjektiv::SubjectRole::new("reserved before deletion").unwrap())
+            .unwrap();
+        let singleton = (!is_job).then(|| format!("subjektiv:{}", subject.id));
+        let allocation = if is_job {
+            let request = BackendJobRequest {
+                job_id: "unmaterialized-subject-job".into(),
+                purpose: "subject_reservation_contract".into(),
+                input_ref: "subject:reserved".into(),
+                input: json!({"private":"reserved input"}),
+                instruction: "read".into(),
+                profile: "builtin:backend-job".into(),
+                grants: crate::backend_job::BackendJobGrants {
+                    subjektiv_consolidation: Some(
+                        crate::backend_job::SubjektivConsolidationGrant {
+                            subject_id: subject.id.clone(),
+                            candidate_ids: vec!["candidate".into()],
+                        },
+                    ),
+                    ..Default::default()
+                },
+                serialization_key: None,
+                source_worker: None,
+                notification_target: None,
+                limits: Default::default(),
+            };
+            let reserved = api
+                .store
+                .reserve_backend_job(TEST_WORKSPACE_ID, &request, &Utc::now().to_rfc3339())
+                .unwrap();
+            crate::backend_job::allocation_key(&reserved.attempt.attempt_id)
+        } else {
+            "unmaterialized-subject-body".into()
+        };
+        let settings = api
+            .config_store
+            .get_workspace_memory_settings(TEST_WORKSPACE_ID)
+            .unwrap();
+        let reserved = api
+            .config_store
+            .reserve_worker_create(
+                TEST_WORKSPACE_ID,
+                EMBEDDED_WORKER_RUNTIME_ID,
+                &allocation,
+                "unmaterialized-fingerprint",
+                singleton.as_deref(),
+                &settings,
+            )
+            .unwrap();
+        let worker =
+            RuntimeWorkerRef::new(EMBEDDED_WORKER_RUNTIME_ID, reserved.worker_id.to_string());
+        assert!(matches!(
+            api.runtime.worker(&worker),
+            Err(RuntimeRegistryError::UnknownWorker { .. })
+        ));
+        let (status, body) = delete_request(
+            &api,
+            &subject.id,
+            &format!("delete-reserved-{is_job}"),
+            Some(&owner),
+            TEST_WORKSPACE_ID,
+        )
+        .await;
+        assert_eq!(status, StatusCode::OK, "{body}");
+        assert_eq!(body["completed"], true);
+        assert!(subject_authorization::worker_permissions(&api, &worker).is_err());
+        let proved = api.config_store.with_conn(|conn| Ok(conn.query_row("SELECT originals_absent FROM subject_deletion_workers WHERE workspace_id=?1 AND subject_id=?2 AND runtime_id=?3 AND worker_id=?4", rusqlite::params![TEST_WORKSPACE_ID,subject.id,worker.runtime_id,worker.worker_id], |row|row.get::<_,bool>(0))?)).unwrap();
+        assert!(proved);
+        assert!(
+            api.config_store
+                .recover_worker_removal_execution(TEST_WORKSPACE_ID, &worker)
+                .unwrap()
+                .is_none(),
+            "absence is not a fabricated Purge/archive receipt"
+        );
+        assert!(
+            api.config_store
+                .reserve_worker_create(
+                    TEST_WORKSPACE_ID,
+                    EMBEDDED_WORKER_RUNTIME_ID,
+                    &allocation,
+                    "unmaterialized-fingerprint",
+                    singleton.as_deref(),
+                    &settings
+                )
+                .is_err()
+        );
+        if let Some(singleton) = singleton {
+            assert!(
+                api.store
+                    .current_worker_singleton_owner(TEST_WORKSPACE_ID, &singleton)
+                    .unwrap()
+                    .is_none()
+            );
+        }
+    }
+}

crates/workspace-server/src/server/tests/subjektiv_journal_tests.rs

@@ -1143,6 +1143,8 @@ async fn unknown_partial_waits_for_durable_purge_fence_and_retains_sources_when_
             &Utc::now().to_rfc3339(),
         )
         .unwrap();
+    // Discard only the original delivery, before recovery can automatically retry.
+    f.execution.take_inputs();
     f.api.recover_backend_job_worker_cleanups().unwrap();
     wait_for_backend_job_worker_cleanup(
         &f.api,
@@ -1151,23 +1153,64 @@ async fn unknown_partial_waits_for_durable_purge_fence_and_retains_sources_when_
         BackendJobWorkerCleanupState::Completed,
     )
     .await;
-    // Cleanup commits before domain reconciliation; wait for its authoritative outcome.
-    tokio::time::timeout(std::time::Duration::from_secs(10), async {
+    // Cleanup commits before domain reconciliation. Job Failed is only transient:
+    // reconcile_unknown fences this attempt, then automatically reserves/queues its
+    // retry. Observe the immutable attempt outcome and the delivered new generation,
+    // not the Job's transient state; a manual retry would race the automatic one.
+    let reconciliation = tokio::time::timeout(std::time::Duration::from_secs(10), async {
         loop {
-            let job = f
-                .api
-                .store
-                .get_backend_job(TEST_WORKSPACE_ID, &f.request.job_id)
-                .unwrap()
-                .unwrap();
-            if job.state == BackendJobState::Failed {
-                break;
+            let original = f.api.store.get_backend_job_attempt(
+                TEST_WORKSPACE_ID,
+                &f.request.job_id,
+                &dispatched.attempt.attempt_id,
+            ).unwrap().unwrap();
+            if original.state == BackendJobAttemptState::Failed {
+                assert_eq!(original.failure_category.as_deref(), Some("journal_attempt_fenced"));
+                assert_eq!(original.worker_cleanup_state, Some(BackendJobWorkerCleanupState::Completed));
+                assert!(original.worker_cleanup_completed_at.is_some());
+                if let Some(generation) = f.store.active_journal_generation(&f.host, &f.id).unwrap()
+                    && generation.job.attempt_id != original.attempt_id
+                    && let Some(retry) = f.api.store.get_backend_job_attempt(
+                        TEST_WORKSPACE_ID,
+                        &f.request.job_id,
+                        &generation.job.attempt_id,
+                    ).unwrap()
+                    && retry.state == BackendJobAttemptState::Dispatched
+                    && let Some(resumed) = &retry.worker
+                    // Worker binding precedes input delivery/attestation. ReadState
+                    // succeeds only once the new generation's delivery is attested.
+                    && subjektiv_journal::execute(&f.api, resumed, JournalJobRequest::ReadState).is_ok()
+                {
+                    break (original, retry, generation);
+                }
             }
-            tokio::task::yield_now().await;
+            tokio::time::sleep(std::time::Duration::from_millis(10)).await;
         }
     })
-    .await
-    .unwrap();
+    .await;
+    assert!(
+        reconciliation.is_ok(),
+        "post-cleanup reconciliation timed out: job={:?}, original_attempt={:?}, active_generation={:?}",
+        f.api
+            .store
+            .get_backend_job(TEST_WORKSPACE_ID, &f.request.job_id)
+            .unwrap(),
+        f.api
+            .store
+            .get_backend_job_attempt(
+                TEST_WORKSPACE_ID,
+                &f.request.job_id,
+                &dispatched.attempt.attempt_id
+            )
+            .unwrap(),
+        f.store.active_journal_generation(&f.host, &f.id).unwrap(),
+    );
+    let (fenced, retry, generation) = reconciliation.unwrap();
+    assert_eq!(fenced.worker, dispatched.attempt.worker);
+    assert_eq!(retry.attempt, dispatched.attempt.attempt + 1);
+    assert_eq!(generation.job.job_id, f.request.job_id);
+    assert_eq!(generation.job.attempt_id, retry.attempt_id);
+    assert_eq!(retry.input_digest, f.request.input_digest().unwrap());
     f.assert_purged(worker);
     assert!(f.store.journal_retention_required(&f.host).unwrap());
     assert_eq!(
@@ -1187,25 +1230,25 @@ async fn unknown_partial_waits_for_durable_purge_fence_and_retains_sources_when_
         1,
         "source pin survives failed/partial Job cleanup"
     );
-    f.execution.take_inputs();
-    let retry = f
+    let job = f
         .api
         .store
-        .reserve_backend_job_retry(
-            TEST_WORKSPACE_ID,
-            &f.request.job_id,
-            &Utc::now().to_rfc3339(),
-        )
+        .get_backend_job(TEST_WORKSPACE_ID, &f.request.job_id)
+        .unwrap()
         .unwrap();
-    assert_eq!(retry.job.request.input, f.request.input);
-    assert_eq!(retry.job.input_digest, f.request.input_digest().unwrap());
-    let retry = f.api.dispatch_backend_job_reservation(retry).unwrap();
-    let resumed = retry.attempt.worker.as_ref().unwrap();
+    assert_eq!(job.state, BackendJobState::Pending);
+    assert_eq!(job.current_attempt, retry.attempt);
+    assert_eq!(
+        job.load_executable_request().unwrap().input,
+        f.request.input
+    );
+    assert_eq!(job.input_digest, f.request.input_digest().unwrap());
+    let resumed = retry.worker.as_ref().unwrap();
     let delivered = f.execution.take_inputs();
     assert_eq!(delivered.len(), 1);
     assert_eq!(
         delivered[0].1,
-        f.request.worker_input(&retry.attempt.attempt_id).unwrap()
+        f.request.worker_input(&retry.attempt_id).unwrap()
     );
     assert_eq!(
         f.store

crates/workspace-server/src/store.rs

@@ -92,6 +92,13 @@ use crate::backend_job::{
 use crate::workspace_deletion::WorkspaceDeletionStore;
 use crate::{Error, Result};
 
+#[path = "subject_deletion_store.rs"]
+mod subject_deletion_store;
+pub(crate) use subject_deletion_store::{
+    prior_removal_matches as subject_deletion_prior_removal_matches,
+    worker_kind as subject_deletion_worker_kind,
+};
+
 #[path = "activation.rs"]
 mod activation;
 pub use activation::ActivationCodeIssue;
@@ -119,7 +126,7 @@ pub use ticket::{
 };
 
 const OLDEST_SCHEMA_VERSION: i64 = 50;
-const LATEST_SCHEMA_VERSION: i64 = 104;
+const LATEST_SCHEMA_VERSION: i64 = 105;
 const WORKSPACE_DRIVE_GRANTS_MIGRATION_NAME: &str = "durable Workspace Drive grants";
 const WORKSPACE_CONFIG_GRANTS_MIGRATION_NAME: &str = "Workspace config grants and logical Workdirs";
 const SCHEMA_BASELINE_NAME: &str = "workspace schema baseline";
@@ -447,6 +454,11 @@ const MIGRATIONS: &[Migration] = &[
         name: "Converge Passkey results and Job input retention",
         apply: migrate_schema_103_variants_to_v104,
     },
+    Migration {
+        version: 105,
+        name: "Durable Subject deletion snapshots and Job admission fences",
+        apply: subject_deletion_store::migrate,
+    },
 ];
 
 // Both schema-103 identities shipped. Keep the alternate implementation and accept
@@ -3000,6 +3012,7 @@ impl SqliteWorkspaceStore {
         validate_workspace_memory_settings_record(current_memory_settings, workspace_id)?;
         self.with_conn_mut(|conn| {
             let tx = conn.transaction_with_behavior(TransactionBehavior::Immediate)?;
+            subject_deletion_store::require_worker_admission(&tx, workspace_id, allocation_key, singleton_key)?;
             let fixed_worker_id = prepare(&tx)?;
             let existing = tx
                 .query_row(
@@ -7455,6 +7468,7 @@ impl ControlPlaneStore for SqliteWorkspaceStore {
         let deadline = backend_job_deadline(now, request.limits.timeout_seconds)?;
         self.with_conn_mut(|conn| {
             let tx = conn.transaction_with_behavior(TransactionBehavior::Immediate)?;
+            subject_deletion_store::require_job_admission(&tx, workspace_id, request)?;
             if let Some(job) = read_backend_job(&tx, workspace_id, &request.job_id)? {
                 if job.intent_fingerprint != fingerprint {
                     return Err(Error::InvalidInput(format!(
@@ -7532,7 +7546,8 @@ impl ControlPlaneStore for SqliteWorkspaceStore {
                 return Ok(job);
             }
             if reason == JobInputRetirementReason::Completed {
-                job.load_executable_request()?;
+                subject_deletion_store::require_job_admission(&tx, workspace_id, &job.request)?;
+            job.load_executable_request()?;
                 let attempt = read_backend_job_attempt(&tx, workspace_id, job_id, &attempt_id(job_id, job.current_attempt))?
                     .ok_or_else(|| Error::Store("Backend Job current attempt missing".into()))?;
                 if job.state != BackendJobState::Completed || attempt.state != BackendJobAttemptState::Completed
@@ -7562,6 +7577,7 @@ impl ControlPlaneStore for SqliteWorkspaceStore {
             let tx = conn.transaction_with_behavior(TransactionBehavior::Immediate)?;
             let mut job = read_backend_job(&tx, workspace_id, job_id)?
                 .ok_or_else(|| Error::InvalidInput(format!("unknown Backend Job `{job_id}`")))?;
+            subject_deletion_store::require_job_admission(&tx, workspace_id, &job.request)?;
             job.load_executable_request()?;
             let previous_id = attempt_id(job_id, job.current_attempt);
             let previous = read_backend_job_attempt(&tx, workspace_id, job_id, &previous_id)?
@@ -7701,6 +7717,7 @@ impl ControlPlaneStore for SqliteWorkspaceStore {
             let tx = conn.transaction_with_behavior(TransactionBehavior::Immediate)?;
             let job = read_backend_job(&tx, workspace_id, job_id)?
                 .ok_or_else(|| Error::InvalidInput(format!("unknown Backend Job `{job_id}`")))?;
+            subject_deletion_store::require_job_admission(&tx, workspace_id, &job.request)?;
             job.load_executable_request()?;
             let attempt = read_backend_job_attempt(&tx, workspace_id, job_id, attempt_id)?
                 .ok_or_else(|| Error::InvalidInput(format!("unknown Backend Job attempt `{attempt_id}`")))?;
@@ -7764,6 +7781,7 @@ impl ControlPlaneStore for SqliteWorkspaceStore {
             let tx = conn.transaction_with_behavior(TransactionBehavior::Immediate)?;
             let job = read_backend_job(&tx, workspace_id, job_id)?
                 .ok_or_else(|| Error::InvalidInput(format!("unknown Backend Job `{job_id}`")))?;
+            subject_deletion_store::require_job_admission(&tx, workspace_id, &job.request)?;
             job.load_executable_request()?;
             let attempt = read_backend_job_attempt(&tx, workspace_id, job_id, attempt_id)?
                 .ok_or_else(|| Error::InvalidInput(format!("unknown Backend Job attempt `{attempt_id}`")))?;
@@ -7827,6 +7845,7 @@ impl ControlPlaneStore for SqliteWorkspaceStore {
         self.with_conn_mut(|conn| {
             let tx = conn.transaction_with_behavior(TransactionBehavior::Immediate)?;
             let job = read_backend_job(&tx, workspace_id, job_id)?.ok_or_else(|| Error::InvalidInput("Backend Job missing".into()))?;
+            subject_deletion_store::require_job_admission(&tx, workspace_id, &job.request)?;
             job.load_executable_request()?;
             let attempt = read_backend_job_attempt(&tx, workspace_id, job_id, attempt_id)?
                 .ok_or_else(|| {
@@ -7880,6 +7899,7 @@ impl ControlPlaneStore for SqliteWorkspaceStore {
                 .ok_or_else(|| Error::InvalidInput(format!("unknown Backend Job `{}`", submission.job_id)))?;
             let attempt = read_backend_job_attempt(&tx, workspace_id, &submission.job_id, &submission.attempt_id)?
                 .ok_or_else(|| Error::InvalidInput(format!("unknown Backend Job attempt `{}`", submission.attempt_id)))?;
+            subject_deletion_store::require_job_admission(&tx, workspace_id, &job.request)?;
             let (digest, result_json) = result_digest(&submission.result, job.request.limits.max_result_bytes)?;
             if submission.input_digest != job.input_digest
                 || attempt.input_digest != submission.input_digest
@@ -7908,6 +7928,7 @@ impl ControlPlaneStore for SqliteWorkspaceStore {
                 tx.commit()?;
                 return Ok(BackendJobResultAcceptance { job, attempt, replayed: true });
             }
+            subject_deletion_store::require_job_admission(&tx, workspace_id, &job.request)?;
             job.load_executable_request()?;
             if attempt.state != BackendJobAttemptState::Dispatched || job.state != BackendJobState::Pending {
                 return Err(Error::InvalidInput(
@@ -7972,6 +7993,7 @@ impl ControlPlaneStore for SqliteWorkspaceStore {
         self.with_conn_mut(|conn| {
             let tx = conn.transaction_with_behavior(TransactionBehavior::Immediate)?;
             let job = read_backend_job(&tx, workspace_id, &expected.job_id)?.ok_or_else(|| Error::InvalidInput("Journal Job missing".into()))?;
+            subject_deletion_store::require_job_admission(&tx, workspace_id, &job.request)?;
             let attempt = read_backend_job_attempt(&tx, workspace_id, &expected.job_id, &expected.attempt_id)?.ok_or_else(|| Error::InvalidInput("Journal attempt missing".into()))?;
             // Full snapshot CAS includes Worker, tracked Run, input and cleanup evidence.
             if &attempt != expected || job.current_attempt != attempt.attempt
@@ -8277,6 +8299,8 @@ impl ControlPlaneStore for SqliteWorkspaceStore {
     ) -> Result<(BackendJobDeliveryRecord, bool)> {
         self.with_conn_mut(|conn| {
             let tx = conn.transaction_with_behavior(TransactionBehavior::Immediate)?;
+            let deleted:bool=tx.query_row("SELECT EXISTS(SELECT 1 FROM subject_deletion_jobs WHERE workspace_id=?1 AND job_id=?2)",params![workspace_id,job_id],|r|r.get(0))?;
+            if deleted {return Err(Error::RepositoryConflict("subject_deleted: Job delivery fenced".into()));}
             if let Some(existing) = read_backend_job_delivery(&tx, workspace_id, delivery_id)? {
                 if existing.job_id != job_id || existing.target != *target {
                     return Err(Error::InvalidInput(
@@ -15545,6 +15569,7 @@ fn create_latest_workspace_schema(conn: &Connection) -> Result<()> {
     notification_routing::jobs::install(conn)?;
     notification_routing::install_business_events(conn)?;
     notification_routing::upgrade_result_reports(conn)?;
+    subject_deletion_store::install_notification_erasure(conn)?;
     ticket::verify_sqlite_ticket_schema(conn).map_err(|error| {
         Error::Store(format!(
             "fresh Workspace Ticket schema verification failed: {error}"
@@ -15583,10 +15608,17 @@ fn create_workspace_schema_structure_from_sql(
     CREATE UNIQUE INDEX worker_restore_intent_pending_domain ON worker_restore_intents(workspace_id,runtime_id,worker_id,domain_key) WHERE settled=0;")?;
 
     conn.execute_batch("DROP TABLE IF EXISTS typed_ticket_targets;")?;
-    conn.execute_batch(&schema_sql.replace(
-        "-- Ticket-owned assignment schema is composed by store.rs.",
-        ticket::TICKET_ASSIGNMENT_SCHEMA_SQL,
-    ))?;
+    conn.execute_batch(
+        &schema_sql
+            .replace(
+                "-- Ticket-owned assignment schema is composed by store.rs.",
+                ticket::TICKET_ASSIGNMENT_SCHEMA_SQL,
+            )
+            .replace(
+                "-- Subject deletion schema is composed by store.rs.",
+                include_str!("subject_deletion_schema.sql"),
+            ),
+    )?;
     let composed_sql = r#"
         ALTER TABLE typed_tickets RENAME TO typed_tickets_legacy_v66;
         CREATE TABLE typed_tickets (
@@ -15809,6 +15841,9 @@ fn verify_workspace_resource_constraints(conn: &Connection) -> Result<()> {
     if current_schema_version(conn)? >= 96 {
         notification_routing::jobs::verify(conn)?;
     }
+    if current_schema_version(conn)? >= 105 {
+        subject_deletion_store::verify(conn)?;
+    }
     Ok(())
 }
 
@@ -16223,6 +16258,8 @@ fn current_worker_singleton_owner(
                     CASE WHEN substr(owner.singleton_key,1,10)='subjektiv:' AND reservation.state='removed' \
                       AND NOT EXISTS(SELECT 1 FROM subject_worker_releases r WHERE r.workspace_id=owner.workspace_id AND r.worker_id=owner.worker_id AND r.runtime_id=owner.runtime_id AND r.singleton_key=owner.singleton_key AND r.singleton_generation=owner.generation AND r.completed=1) \
                       AND NOT EXISTS(SELECT 1 FROM subject_create_recoveries r WHERE r.workspace_id=owner.workspace_id AND r.worker_id=owner.worker_id AND r.runtime_id=owner.runtime_id AND r.singleton_key=owner.singleton_key AND r.singleton_generation=owner.generation AND r.create_fingerprint=reservation.create_fingerprint AND r.completed=1) \
+                      AND NOT EXISTS(SELECT 1 FROM worker_removal_operations r JOIN subject_deletion_workers d ON d.workspace_id=r.workspace_id AND d.runtime_id=r.runtime_id AND d.worker_id=r.worker_id WHERE r.workspace_id=owner.workspace_id AND r.runtime_id=owner.runtime_id AND r.worker_id=owner.worker_id AND r.state='succeeded' AND owner.singleton_key='subjektiv:'||d.subject_id AND (d.prior_removal_operation_id=r.operation_id OR (d.prior_removal_operation_id IS NULL AND d.is_job=0 AND r.session_disposition='archive' AND r.archive_retention_kind='forever' AND r.metadata_disposition='tombstone'))) \
+                      AND NOT EXISTS(SELECT 1 FROM subject_deletion_workers d WHERE d.workspace_id=owner.workspace_id AND d.runtime_id=owner.runtime_id AND d.worker_id=owner.worker_id AND owner.singleton_key='subjektiv:'||d.subject_id AND d.originals_absent=1) \
                     THEN 'created' ELSE reservation.state END \
              FROM worker_singleton_owners owner \
              LEFT JOIN worker_create_reservations reservation \
@@ -19265,6 +19302,7 @@ CREATE UNIQUE INDEX ticket_current_worker_role_idx
                 WorkspaceSchemaMigrationStep {version:102, name:"Durable failed Subject creation recovery".into()},
                 WorkspaceSchemaMigrationStep {version:103, name:"Passkey metadata and atomic addition results".into()},
                 WorkspaceSchemaMigrationStep {version:104, name:"Converge Passkey results and Job input retention".into()},
+                WorkspaceSchemaMigrationStep {version:105, name:"Durable Subject deletion snapshots and Job admission fences".into()},
             ]
         );
 
@@ -19379,6 +19417,7 @@ CREATE UNIQUE INDEX ticket_current_worker_role_idx
 (102, "Durable failed Subject creation recovery".to_string()),
 (103, "Passkey metadata and atomic addition results".to_string()),
 (104, "Converge Passkey results and Job input retention".to_string()),
+(105, "Durable Subject deletion snapshots and Job admission fences".to_string()),
                     ]
                 );
                 assert!(!table_exists(conn, "trusted_runtime_records")?);
@@ -22664,7 +22703,8 @@ CREATE UNIQUE INDEX ticket_current_worker_role_idx
                          (101, "Durable explicit Subject body release".into()),
                          (102, "Durable failed Subject creation recovery".into()),
                          (103, "Passkey metadata and atomic addition results".into()),
-                         (104, "Converge Passkey results and Job input retention".into())]);
+                         (104, "Converge Passkey results and Job input retention".into()),
+                         (105, "Durable Subject deletion snapshots and Job admission fences".into())]);
                 for (table, rows) in unchanged.iter().zip(before.iter()) {
                     assert_eq!(&stored_fixture_rows(conn, table), rows, "preserve {table}");
                 }
@@ -26857,12 +26897,19 @@ INSERT INTO worker_registry (
             .reserve_backend_job("resource-workspace", &original, RESOURCE_JOB_NOW)
             .unwrap();
         store.with_conn(|conn| {
+            // This fixture deliberately reconstructs schema 102 from fresh.
+            // Remove the newer Subject fence composition, not just its receipt.
+            let triggers=conn.prepare("SELECT name,tbl_name FROM sqlite_schema WHERE type='trigger' AND tbl_name LIKE 'notification_%' AND name NOT LIKE 'subject_deleted_%' AND sql LIKE '%subject_deletion_jobs%'")?
+                .query_map([],|r|Ok((r.get::<_,String>(0)?,r.get::<_,String>(1)?)))?.collect::<rusqlite::Result<Vec<_>>>()?;
+            for (name,table) in triggers {conn.execute_batch(&format!("DROP TRIGGER {name}; CREATE TRIGGER {name} BEFORE DELETE ON {table} BEGIN SELECT RAISE(ABORT,'Notification evidence is immutable'); END;"))?;}
+            for name in ["subject_deleted_job_insert","subject_deleted_job_result","subject_deleted_attempt_insert","subject_deleted_attempt_result","subject_deleted_worker_reservation","subject_deleted_notification_source","subject_deleted_notification_payload","subject_deleted_notification_send","subject_deletion_worker_prior_insert","subject_deletion_worker_identity_immutable"] {conn.execute_batch(&format!("DROP TRIGGER {name}"))?;}
+            conn.execute_batch("DROP TABLE subject_deletion_allocations; DROP TABLE subject_deletion_jobs; DROP TABLE subject_deletion_workers; DROP TABLE subject_deletions;")?;
             conn.execute_batch("DROP TRIGGER backend_job_input_retirement; DROP TRIGGER backend_job_identity_immutable;
                 ALTER TABLE backend_jobs DROP COLUMN input_disposition;
                 DROP TRIGGER passkey_metadata_insert;
                 DROP TABLE passkey_addition_receipts;
                 DROP TABLE passkey_metadata;
-                UPDATE __yoi_schema_migrations SET version=102 WHERE version=104;
+                UPDATE __yoi_schema_migrations SET version=102 WHERE version=105;
                 CREATE TRIGGER backend_job_input_retirement BEFORE UPDATE ON backend_job_attempts BEGIN SELECT RAISE(ABORT,'collision'); END;")?; Ok(())
         }).unwrap();
         drop(store);

crates/workspace-server/src/subject_deletion_schema.sql

@@ -0,0 +1,73 @@
+-- Content-free, monotonic main-DB fence. The Host installs the domain fence first
+-- and holds its Subject gate across snapshot/admission. No Subject contents live here.
+CREATE TABLE subject_deletions (
+    workspace_id TEXT NOT NULL,
+    subject_id TEXT NOT NULL,
+    operation_id TEXT NOT NULL CHECK(length(operation_id)>0),
+    completed INTEGER NOT NULL DEFAULT 0 CHECK(completed IN (0,1)),
+    jobs_erased INTEGER NOT NULL DEFAULT 0 CHECK(jobs_erased IN (0,1)),
+    PRIMARY KEY(workspace_id,subject_id),
+    UNIQUE(workspace_id,operation_id),
+    FOREIGN KEY(workspace_id) REFERENCES workspaces(workspace_id) ON DELETE CASCADE
+);
+CREATE TABLE subject_deletion_workers (
+    workspace_id TEXT NOT NULL,
+    subject_id TEXT NOT NULL,
+    runtime_id TEXT NOT NULL,
+    worker_id TEXT NOT NULL,
+    is_job INTEGER NOT NULL CHECK(is_job IN (0,1)),
+    -- Exact canonical success already present at prepare, never a later receipt.
+    prior_removal_operation_id TEXT REFERENCES worker_removal_operations(operation_id),
+    -- Confirmed by the scoped Runtime storage owner, not catalog absence or Stop ACK.
+    originals_absent INTEGER NOT NULL DEFAULT 0 CHECK(originals_absent IN (0,1)),
+    PRIMARY KEY(workspace_id,subject_id,runtime_id,worker_id),
+    FOREIGN KEY(workspace_id,subject_id) REFERENCES subject_deletions(workspace_id,subject_id) ON DELETE CASCADE
+);
+CREATE TRIGGER subject_deletion_worker_prior_insert BEFORE INSERT ON subject_deletion_workers
+WHEN NEW.prior_removal_operation_id IS NOT NULL AND NOT EXISTS(
+ SELECT 1 FROM worker_removal_operations r WHERE r.operation_id=NEW.prior_removal_operation_id
+ AND r.workspace_id=NEW.workspace_id AND r.runtime_id=NEW.runtime_id
+ AND r.worker_id=NEW.worker_id AND r.state='succeeded')
+BEGIN SELECT RAISE(ABORT,'Subject deletion prior removal must be an exact canonical success'); END;
+CREATE TRIGGER subject_deletion_worker_identity_immutable BEFORE UPDATE OF
+ workspace_id,subject_id,runtime_id,worker_id,prior_removal_operation_id ON subject_deletion_workers
+BEGIN SELECT RAISE(ABORT,'Subject deletion Worker snapshot identity is immutable'); END;
+CREATE TRIGGER subject_deletion_original_absence_monotonic BEFORE UPDATE OF originals_absent ON subject_deletion_workers
+WHEN OLD.originals_absent=1 AND NEW.originals_absent=0
+BEGIN SELECT RAISE(ABORT,'Subject deletion original absence proof is permanent'); END;
+-- Job/attempt identities remain after payload erasure, preventing stale allocation
+-- or caller-selected Job-id reuse from recreating the deleted Subject's inputs.
+CREATE TABLE subject_deletion_jobs (
+    workspace_id TEXT NOT NULL,
+    subject_id TEXT NOT NULL,
+    job_id TEXT NOT NULL,
+    PRIMARY KEY(workspace_id,job_id),
+    FOREIGN KEY(workspace_id,subject_id) REFERENCES subject_deletions(workspace_id,subject_id) ON DELETE CASCADE
+);
+CREATE TABLE subject_deletion_allocations (
+    workspace_id TEXT NOT NULL,
+    subject_id TEXT NOT NULL,
+    allocation_key TEXT NOT NULL,
+    PRIMARY KEY(workspace_id,allocation_key),
+    FOREIGN KEY(workspace_id,subject_id) REFERENCES subject_deletions(workspace_id,subject_id) ON DELETE CASCADE
+);
+CREATE TRIGGER subject_deleted_job_insert BEFORE INSERT ON backend_jobs
+WHEN EXISTS(SELECT 1 FROM subject_deletions d WHERE d.workspace_id=NEW.workspace_id AND
+ (d.subject_id=json_extract(NEW.request_json,'$.grants.subjektiv_journal.subject_id') OR
+  d.subject_id=json_extract(NEW.request_json,'$.grants.subjektiv_consolidation.subject_id')))
+ OR EXISTS(SELECT 1 FROM subject_deletion_jobs d WHERE d.workspace_id=NEW.workspace_id AND d.job_id=NEW.job_id)
+BEGIN SELECT RAISE(ABORT,'subject_deleted: Job admission fenced'); END;
+CREATE TRIGGER subject_deleted_job_result BEFORE UPDATE OF state,result_json ON backend_jobs
+WHEN NEW.state!='failed' AND EXISTS(SELECT 1 FROM subject_deletion_jobs d WHERE d.workspace_id=NEW.workspace_id AND d.job_id=NEW.job_id)
+BEGIN SELECT RAISE(ABORT,'subject_deleted: Job result fenced'); END;
+CREATE TRIGGER subject_deleted_attempt_insert BEFORE INSERT ON backend_job_attempts
+WHEN EXISTS(SELECT 1 FROM subject_deletion_jobs d WHERE d.workspace_id=NEW.workspace_id AND d.job_id=NEW.job_id)
+BEGIN SELECT RAISE(ABORT,'subject_deleted: Job retry fenced'); END;
+CREATE TRIGGER subject_deleted_attempt_result BEFORE UPDATE OF state,result_json,runtime_id,worker_id,runtime_run_id ON backend_job_attempts
+WHEN NEW.state!='failed' AND EXISTS(SELECT 1 FROM subject_deletion_jobs d WHERE d.workspace_id=NEW.workspace_id AND d.job_id=NEW.job_id)
+BEGIN SELECT RAISE(ABORT,'subject_deleted: Job attempt fenced'); END;
+CREATE TRIGGER subject_deleted_worker_reservation BEFORE INSERT ON worker_create_reservations
+WHEN EXISTS(SELECT 1 FROM subject_deletions d WHERE d.workspace_id=NEW.workspace_id AND
+ NEW.singleton_key IN ('subjektiv:'||d.subject_id,'subjektiv-consolidation:'||d.subject_id))
+ OR EXISTS(SELECT 1 FROM subject_deletion_allocations d WHERE d.workspace_id=NEW.workspace_id AND d.allocation_key=NEW.allocation_key)
+BEGIN SELECT RAISE(ABORT,'subject_deleted: Worker allocation fenced'); END;

crates/workspace-server/src/workspace_deletion.rs

@@ -94,6 +94,12 @@ const WORKSPACE_DELETION_PURGE_TABLES: &[&str] = &[
     "workdir_registry",
     "workdir_removal_operations",
     "worker_control_grants",
+    // Snapshot children precede their fence parent and canonical Worker removal
+    // receipts (subject_deletion_workers.prior_removal_operation_id).
+    "subject_deletion_allocations",
+    "subject_deletion_jobs",
+    "subject_deletion_workers",
+    "subject_deletions",
     "subject_worker_releases",
     "subject_create_recoveries",
     "worker_create_reservations",
@@ -1276,6 +1282,134 @@ mod tests {
         }
     }
 
+    #[test]
+    fn workspace_purge_removes_subject_deletion_snapshots_and_preserves_other_workspace() {
+        let (store, owner, workspace_id) = setup();
+        let tables = [
+            "subject_deletion_allocations",
+            "subject_deletion_jobs",
+            "subject_deletion_workers",
+            "subject_deletions",
+            "worker_removal_operations",
+        ];
+        // Check the explicit FK ordering as well as execution (the purge defers FKs).
+        let position = |table| {
+            WORKSPACE_DELETION_PURGE_TABLES
+                .iter()
+                .position(|name| *name == table)
+                .unwrap()
+        };
+        for child in &tables[..3] {
+            assert!(position(*child) < position("subject_deletions"));
+        }
+        assert!(position("subject_deletion_workers") < position("worker_removal_operations"));
+        for workspace in ["workspace-a", "workspace-b"] {
+            store.with_conn(|conn| {
+                conn.execute("INSERT INTO worker_removal_operations(
+                    operation_id,plan_id,input_fingerprint,workspace_id,runtime_id,worker_id,
+                    worker_updated_at,policy_id,policy_digest,session_disposition,metadata_disposition,
+                    archive_retention_kind,diagnostics_disposition,blockers_json,state,reason,created_at,updated_at)
+                    VALUES(?1,?1,'fingerprint',?1,'runtime','worker','1','policy','digest',
+                        'purge','purge','forever','purge','[]','succeeded','removed','1','1')", [workspace])?;
+                conn.execute("INSERT INTO subject_deletions(workspace_id,subject_id,operation_id,completed,jobs_erased)
+                    VALUES(?1,'subject','subject-delete',1,1)", [workspace])?;
+                conn.execute("INSERT INTO subject_deletion_workers(workspace_id,subject_id,runtime_id,worker_id,is_job,prior_removal_operation_id,originals_absent)
+                    VALUES(?1,'subject','runtime','worker',1,?1,1)", [workspace])?;
+                conn.execute("INSERT INTO subject_deletion_jobs VALUES(?1,'subject','job')", [workspace])?;
+                conn.execute("INSERT INTO subject_deletion_allocations VALUES(?1,'subject','allocation')", [workspace])?;
+                Ok(())
+            }).unwrap();
+        }
+        let rows = |workspace: &str| {
+            store
+                .with_conn(|conn| {
+                    tables
+                        .iter()
+                        .map(|table| {
+                            let mut statement = conn
+                                .prepare(&format!("SELECT * FROM {table} WHERE workspace_id=?1"))?;
+                            let count = statement.column_count();
+                            Ok(statement
+                                .query_map([workspace], |row| {
+                                    (0..count)
+                                        .map(|index| row.get::<_, rusqlite::types::Value>(index))
+                                        .collect::<rusqlite::Result<Vec<_>>>()
+                                })?
+                                .collect::<rusqlite::Result<Vec<_>>>()?)
+                        })
+                        .collect::<Result<Vec<_>>>()
+                })
+                .unwrap()
+        };
+        let before = rows("workspace-a");
+        let other = rows("workspace-b");
+        assert!(before.iter().all(|table| table.len() == 1));
+        let preflight = store
+            .workspace_deletion_preflight(&owner, &workspace_id)
+            .unwrap();
+        let operation = store
+            .reserve_workspace_deletion(
+                &owner,
+                &workspace_id,
+                &WorkspaceDeletionRequest {
+                    operation_id: "purge-subject-snapshots".into(),
+                    expected_workspace_updated_at: preflight.expected_workspace_updated_at,
+                    confirmation: "Alpha".into(),
+                },
+            )
+            .unwrap()
+            .operation;
+        store
+            .with_conn(|conn| {
+                conn.execute_batch(
+                    "CREATE TRIGGER reject_subject_snapshot_purge BEFORE DELETE ON workspaces
+                BEGIN SELECT RAISE(ABORT,'injected purge failure'); END;",
+                )?;
+                Ok(())
+            })
+            .unwrap();
+        assert!(
+            store
+                .finalize_workspace_deletion(&operation.operation_id)
+                .is_err()
+        );
+        assert_eq!(
+            rows("workspace-a"),
+            before,
+            "rollback restores snapshots and canonical receipt"
+        );
+        assert_eq!(rows("workspace-b"), other);
+        store
+            .with_conn(|conn| {
+                conn.execute_batch("DROP TRIGGER reject_subject_snapshot_purge")?;
+                Ok(())
+            })
+            .unwrap();
+        let completed = store
+            .finalize_workspace_deletion(&operation.operation_id)
+            .unwrap();
+        assert_eq!(completed.state, WorkspaceDeletionState::Succeeded);
+        assert!(rows("workspace-a").iter().all(|table| table.is_empty()));
+        assert_eq!(rows("workspace-b"), other);
+        assert_eq!(
+            store
+                .finalize_workspace_deletion(&operation.operation_id)
+                .unwrap(),
+            completed
+        );
+        store
+            .with_conn(|conn| {
+                assert_eq!(
+                    conn.query_row("SELECT count(*) FROM pragma_foreign_key_check", [], |row| {
+                        row.get::<_, i64>(0)
+                    })?,
+                    0
+                );
+                Ok(())
+            })
+            .unwrap();
+    }
+
     #[test]
     fn deletion_is_idempotent_and_removes_workspace_scoped_rows() {
         let (store, owner, workspace_id) = setup();

openapi/server-api.json

@@ -11127,6 +11127,40 @@
         ],
         "type": "object"
       },
+      "SubjektivSubjectDeleteRequest": {
+        "additionalProperties": false,
+        "properties": {
+          "operation_id": {
+            "description": "Stable identity retained for every retry, including unknown outcomes.",
+            "type": "string"
+          }
+        },
+        "required": [
+          "operation_id"
+        ],
+        "type": "object"
+      },
+      "SubjektivSubjectDeleteResponse": {
+        "additionalProperties": false,
+        "properties": {
+          "completed": {
+            "description": "False confirms the deletion fence, not external stop or erasure completion.",
+            "type": "boolean"
+          },
+          "operation_id": {
+            "type": "string"
+          },
+          "subject_id": {
+            "type": "string"
+          }
+        },
+        "required": [
+          "subject_id",
+          "operation_id",
+          "completed"
+        ],
+        "type": "object"
+      },
       "SubjektivSubjectListQuery": {
         "additionalProperties": false,
         "properties": {
@@ -11228,11 +11262,19 @@
         "type": "object"
       },
       "SubjektivSubjectState": {
-        "enum": [
-          "active",
-          "retired"
-        ],
-        "type": "string"
+        "oneOf": [
+          {
+            "enum": [
+              "active"
+            ],
+            "type": "string"
+          },
+          {
+            "const": "retired",
+            "description": "Saved compatibility only; not a current lifecycle operation.",
+            "type": "string"
+          }
+        ]
       },
       "SubjektivWorkerConnectionRequest": {
         "additionalProperties": false,
@@ -17129,6 +17171,10 @@
         "additionalProperties": false,
         "description": "Backend-authoritative permissions for the current Workspace actor.",
         "properties": {
+          "delete_subjects": {
+            "description": "Explicit Subject deletion authority for the current authenticated actor.",
+            "type": "boolean"
+          },
           "delete_workspace": {
             "type": "boolean"
           },
@@ -17146,7 +17192,8 @@
           "manage_repositories",
           "manage_secrets",
           "manage_runtimes",
-          "delete_workspace"
+          "delete_workspace",
+          "delete_subjects"
         ],
         "type": "object"
       },
@@ -18302,7 +18349,7 @@
   "info": {
     "title": "Yoi Server API",
     "version": "0.1.0",
-    "x-yoi-source-digest": "sha256:7e640cff6bdcf6dc298cfca695c5cb71a520288b20f4f29ec8df8138724b97c4"
+    "x-yoi-source-digest": "sha256:fc3064f2d7b0d2c2b11e166007943b0cac0cad0918e34d071e20079cf38d655e"
   },
   "openapi": "3.1.0",
   "paths": {
@@ -35014,6 +35061,121 @@
       }
     },
     "/api/w/{workspace_id}/subjektiv/subjects/{subject_id}": {
+      "delete": {
+        "operationId": "subjektiv_subject_delete",
+        "parameters": [
+          {
+            "explode": false,
+            "in": "path",
+            "name": "workspace_id",
+            "required": true,
+            "schema": {
+              "$ref": "#/components/schemas/string"
+            },
+            "style": "simple"
+          },
+          {
+            "explode": false,
+            "in": "path",
+            "name": "subject_id",
+            "required": true,
+            "schema": {
+              "$ref": "#/components/schemas/string"
+            },
+            "style": "simple"
+          }
+        ],
+        "requestBody": {
+          "content": {
+            "application/json": {
+              "schema": {
+                "$ref": "#/components/schemas/SubjektivSubjectDeleteRequest"
+              }
+            }
+          },
+          "required": true
+        },
+        "responses": {
+          "200": {
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/SubjektivSubjectDeleteResponse"
+                }
+              }
+            },
+            "description": "Successful response"
+          },
+          "400": {
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/RepositoryApiError"
+                }
+              }
+            },
+            "description": "Error response"
+          },
+          "401": {
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/RepositoryApiError"
+                }
+              }
+            },
+            "description": "Error response"
+          },
+          "403": {
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/RepositoryApiError"
+                }
+              }
+            },
+            "description": "Error response"
+          },
+          "404": {
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/RepositoryApiError"
+                }
+              }
+            },
+            "description": "Error response"
+          },
+          "409": {
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/RepositoryApiError"
+                }
+              }
+            },
+            "description": "Error response"
+          },
+          "500": {
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/RepositoryApiError"
+                }
+              }
+            },
+            "description": "Error response"
+          }
+        },
+        "security": [
+          {
+            "bearerAuth": []
+          },
+          {
+            "browserSession": []
+          }
+        ]
+      },
       "get": {
         "operationId": "subjektiv_subject_get",
         "parameters": [
@@ -35790,113 +35952,6 @@
         ]
       }
     },
-    "/api/w/{workspace_id}/subjektiv/subjects/{subject_id}/retire": {
-      "post": {
-        "operationId": "subjektiv_subject_retire",
-        "parameters": [
-          {
-            "explode": false,
-            "in": "path",
-            "name": "workspace_id",
-            "required": true,
-            "schema": {
-              "$ref": "#/components/schemas/string"
-            },
-            "style": "simple"
-          },
-          {
-            "explode": false,
-            "in": "path",
-            "name": "subject_id",
-            "required": true,
-            "schema": {
-              "$ref": "#/components/schemas/string"
-            },
-            "style": "simple"
-          }
-        ],
-        "responses": {
-          "200": {
-            "content": {
-              "application/json": {
-                "schema": {
-                  "$ref": "#/components/schemas/SubjektivSubjectResponse"
-                }
-              }
-            },
-            "description": "Successful response"
-          },
-          "400": {
-            "content": {
-              "application/json": {
-                "schema": {
-                  "$ref": "#/components/schemas/RepositoryApiError"
-                }
-              }
-            },
-            "description": "Error response"
-          },
-          "401": {
-            "content": {
-              "application/json": {
-                "schema": {
-                  "$ref": "#/components/schemas/RepositoryApiError"
-                }
-              }
-            },
-            "description": "Error response"
-          },
-          "403": {
-            "content": {
-              "application/json": {
-                "schema": {
-                  "$ref": "#/components/schemas/RepositoryApiError"
-                }
-              }
-            },
-            "description": "Error response"
-          },
-          "404": {
-            "content": {
-              "application/json": {
-                "schema": {
-                  "$ref": "#/components/schemas/RepositoryApiError"
-                }
-              }
-            },
-            "description": "Error response"
-          },
-          "409": {
-            "content": {
-              "application/json": {
-                "schema": {
-                  "$ref": "#/components/schemas/RepositoryApiError"
-                }
-              }
-            },
-            "description": "Error response"
-          },
-          "500": {
-            "content": {
-              "application/json": {
-                "schema": {
-                  "$ref": "#/components/schemas/RepositoryApiError"
-                }
-              }
-            },
-            "description": "Error response"
-          }
-        },
-        "security": [
-          {
-            "bearerAuth": []
-          },
-          {
-            "browserSession": []
-          }
-        ]
-      }
-    },
     "/api/w/{workspace_id}/subjektiv/subjects/{subject_id}/surface": {
       "get": {
         "operationId": "subjektiv_resident_surface",

tools/state-contract-name-exceptions.json

@@ -32,6 +32,14 @@
       }
     ]
   },
+  {
+    "path": "crates/subjektiv/src/deletion/tests.rs",
+    "kind": "saved_data",
+    "reason": "schema 6の固定保存Subject行を投入し、最新migrationが旧retiredとarchive原文を黙って消去・再活性化せず、明示削除だけで消去する検証に必要な旧SQL列名。現行writerや競合制御には使わない。",
+    "lines": [
+      { "sha256": "defca5951b3d48785514b25912044fa3fc252659311b09a31fa2e64af2a19049", "count": 1 }
+    ]
+  },
   {
     "path": "crates/subjektiv/src/journal/memory_links/tests.rs",
     "kind": "saved_data",

tools/web-ux/scenarios/subject-delete-dark.json

@@ -0,0 +1,162 @@
+{
+  "schemaVersion": 1,
+  "id": "subject-delete-dark",
+  "title": "Subject deletion confirmation and retry",
+  "baseUrl": "http://127.0.0.1:15287",
+  "colorScheme": "dark",
+  "reducedMotion": "reduce",
+  "personas": [
+    {
+      "id": "fixture",
+      "label": "Authenticated owner (synthetic HTTP)",
+      "auth": {
+        "kind": "anonymous"
+      }
+    }
+  ],
+  "viewports": [
+    {
+      "label": "desktop",
+      "width": 1440,
+      "height": 900
+    },
+    {
+      "label": "narrow",
+      "width": 768,
+      "height": 900
+    },
+    {
+      "label": "mobile",
+      "width": 390,
+      "height": 844
+    }
+  ],
+  "routes": [
+    {
+      "id": "subject",
+      "label": "Subject detail",
+      "path": "/w/memory-review/memory/pending-subject",
+      "goal": "Review the Subject before irreversible deletion.",
+      "dataState": "Active Subject, no current Worker; owner permissions from Backend projection.",
+      "ready": {
+        "kind": "selector",
+        "selector": ".subject-overview"
+      },
+      "capturePoints": [
+        {
+          "id": "initial",
+          "label": "Subject detail"
+        },
+        {
+          "id": "confirmation",
+          "label": "Irreversible deletion scope and confirmation",
+          "interaction": [
+            {
+              "action": "click",
+              "selector": ".subject-delete-open"
+            }
+          ],
+          "ready": {
+            "kind": "selector",
+            "selector": "[data-delete-state=confirming]"
+          }
+        },
+        {
+          "id": "pending",
+          "label": "Fence saved; erasure unconfirmed",
+          "interaction": [
+            {
+              "action": "click",
+              "selector": ".delete-confirm input"
+            },
+            {
+              "action": "click",
+              "selector": ".subject-deletion button[type=submit]"
+            }
+          ],
+          "ready": {
+            "kind": "selector",
+            "selector": "[data-delete-state=pending]"
+          }
+        },
+        {
+          "id": "completed",
+          "label": "Deletion confirmed",
+          "interaction": [
+            {
+              "action": "click",
+              "selector": ".subject-delete-retry"
+            }
+          ],
+          "ready": {
+            "kind": "selector",
+            "selector": "[data-delete-state=completed]"
+          }
+        }
+      ]
+    },
+    {
+      "id": "legacy",
+      "label": "Legacy ended Subject",
+      "path": "/w/memory-review/memory/legacy-subject",
+      "goal": "Delete a legacy ended Subject without reactivating it.",
+      "dataState": "Saved retired wire state, owner.",
+      "ready": {
+        "kind": "selector",
+        "selector": ".subject-delete-open"
+      },
+      "capturePoints": [
+        {
+          "id": "initial",
+          "label": "Legacy ended Subject"
+        },
+        {
+          "id": "confirmation",
+          "label": "Delete legacy Subject",
+          "interaction": [
+            {
+              "action": "click",
+              "selector": ".subject-delete-open"
+            }
+          ],
+          "ready": {
+            "kind": "selector",
+            "selector": "[data-delete-state=confirming]"
+          }
+        }
+      ]
+    },
+    {
+      "id": "non-owner",
+      "label": "Nonowner Subject view",
+      "path": "/w/memory-review/memory/legacy-subject?persona=reader",
+      "goal": "Read Subject without presenting unauthorized deletion.",
+      "dataState": "Backend delete_subjects=false; no deletion controls.",
+      "ready": {
+        "kind": "selector",
+        "selector": ".subject-overview"
+      },
+      "capturePoints": [
+        {
+          "id": "initial",
+          "label": "Nonowner details"
+        }
+      ]
+    }
+  ],
+  "processes": [
+    {
+      "id": "subject-delete-fixture",
+      "command": "deno",
+      "cwd": "..",
+      "args": [
+        "run",
+        "-A",
+        "../../web/workspace/test/subject-delete-browser/fixture-server.ts",
+        "15287",
+        "../../web/workspace/build"
+      ],
+      "readyUrl": "http://127.0.0.1:15287/health"
+    }
+  ]
+}

tools/web-ux/scenarios/subject-delete-light.json

@@ -0,0 +1,162 @@
+{
+  "schemaVersion": 1,
+  "id": "subject-delete-light",
+  "title": "Subject deletion confirmation and retry",
+  "baseUrl": "http://127.0.0.1:15287",
+  "colorScheme": "light",
+  "reducedMotion": "reduce",
+  "personas": [
+    {
+      "id": "fixture",
+      "label": "Authenticated owner (synthetic HTTP)",
+      "auth": {
+        "kind": "anonymous"
+      }
+    }
+  ],
+  "viewports": [
+    {
+      "label": "desktop",
+      "width": 1440,
+      "height": 900
+    },
+    {
+      "label": "narrow",
+      "width": 768,
+      "height": 900
+    },
+    {
+      "label": "mobile",
+      "width": 390,
+      "height": 844
+    }
+  ],
+  "routes": [
+    {
+      "id": "subject",
+      "label": "Subject detail",
+      "path": "/w/memory-review/memory/pending-subject",
+      "goal": "Review the Subject before irreversible deletion.",
+      "dataState": "Active Subject, no current Worker; owner permissions from Backend projection.",
+      "ready": {
+        "kind": "selector",
+        "selector": ".subject-overview"
+      },
+      "capturePoints": [
+        {
+          "id": "initial",
+          "label": "Subject detail"
+        },
+        {
+          "id": "confirmation",
+          "label": "Irreversible deletion scope and confirmation",
+          "interaction": [
+            {
+              "action": "click",
+              "selector": ".subject-delete-open"
+            }
+          ],
+          "ready": {
+            "kind": "selector",
+            "selector": "[data-delete-state=confirming]"
+          }
+        },
+        {
+          "id": "pending",
+          "label": "Fence saved; erasure unconfirmed",
+          "interaction": [
+            {
+              "action": "click",
+              "selector": ".delete-confirm input"
+            },
+            {
+              "action": "click",
+              "selector": ".subject-deletion button[type=submit]"
+            }
+          ],
+          "ready": {
+            "kind": "selector",
+            "selector": "[data-delete-state=pending]"
+          }
+        },
+        {
+          "id": "completed",
+          "label": "Deletion confirmed",
+          "interaction": [
+            {
+              "action": "click",
+              "selector": ".subject-delete-retry"
+            }
+          ],
+          "ready": {
+            "kind": "selector",
+            "selector": "[data-delete-state=completed]"
+          }
+        }
+      ]
+    },
+    {
+      "id": "legacy",
+      "label": "Legacy ended Subject",
+      "path": "/w/memory-review/memory/legacy-subject",
+      "goal": "Delete a legacy ended Subject without reactivating it.",
+      "dataState": "Saved retired wire state, owner.",
+      "ready": {
+        "kind": "selector",
+        "selector": ".subject-delete-open"
+      },
+      "capturePoints": [
+        {
+          "id": "initial",
+          "label": "Legacy ended Subject"
+        },
+        {
+          "id": "confirmation",
+          "label": "Delete legacy Subject",
+          "interaction": [
+            {
+              "action": "click",
+              "selector": ".subject-delete-open"
+            }
+          ],
+          "ready": {
+            "kind": "selector",
+            "selector": "[data-delete-state=confirming]"
+          }
+        }
+      ]
+    },
+    {
+      "id": "non-owner",
+      "label": "Nonowner Subject view",
+      "path": "/w/memory-review/memory/legacy-subject?persona=reader",
+      "goal": "Read Subject without presenting unauthorized deletion.",
+      "dataState": "Backend delete_subjects=false; no deletion controls.",
+      "ready": {
+        "kind": "selector",
+        "selector": ".subject-overview"
+      },
+      "capturePoints": [
+        {
+          "id": "initial",
+          "label": "Nonowner details"
+        }
+      ]
+    }
+  ],
+  "processes": [
+    {
+      "id": "subject-delete-fixture",
+      "command": "deno",
+      "cwd": "..",
+      "args": [
+        "run",
+        "-A",
+        "../../web/workspace/test/subject-delete-browser/fixture-server.ts",
+        "15287",
+        "../../web/workspace/build"
+      ],
+      "readyUrl": "http://127.0.0.1:15287/health"
+    }
+  ]
+}

web/workspace/deno.json

@@ -6,7 +6,7 @@
     "dev": "deno run -A npm:vite@8.3.2 dev",
     "dev:backend": "cd ../.. && cargo run -p yoi-workspace-server --bin yoi-server -- serve --listen 127.0.0.1:8787",
     "check": "deno run -A npm:@sveltejs/kit@3.0.0 sync && deno run -A npm:svelte-check@4.7.6 --tsconfig ./tsconfig.json",
-    "test": "deno test --allow-read=src,test,tests,../../docs,../../resources/config-schema --allow-env=LOG,VSCODE_TEXTMATE_DEBUG,NODE_ENV tests/workspace-model.test.ts tests/repository-api.test.ts tests/workspace-catalog.test.ts tests/profile-api.test.ts tests/skill-api.test.ts tests/tooltip-contract.test.ts tests/bevel-contract.test.ts tests/bevel-line-contract.test.ts tests/typography-contract.test.ts src/lib/workspace/navigation/deferred.test.ts src/lib/workspace/auth/model.test.ts src/lib/workspace/auth/login.test.ts src/lib/workspace/auth/routes.test.ts src/lib/workspace/auth/hosting.test.ts src/lib/workspace/auth/hosting-enrollment.test.ts src/lib/workspace/auth/activation.test.ts src/lib/workspace/auth/hosting-accounts.test.ts src/lib/workspace/protocol-validator.test.ts tests/auth-api.test.ts src/lib/workspace/api/http.test.ts src/lib/workspace/api/workers.test.ts src/lib/workspace/api/ticket-browser.test.ts src/lib/workspace/api/ticket-case.test.ts src/lib/workspace/api/ticket-operations.test.ts src/lib/workspace/header/breadcrumb-model.test.ts src/lib/workspace/console/chat-submit.test.ts src/lib/workspace/console/composer-delivery.test.ts test/composer-history.test.ts tests/composer-paste.test.ts src/lib/workspace/console/composer-command.test.ts src/lib/workspace/console/composer-draft.test.ts src/lib/workspace/console/composer-completion.test.ts src/lib/workspace/console/composer-invocation.test.ts src/lib/workspace/console/file-completions.test.ts test/console/ansi.test.ts src/lib/workspace/console/history.test.ts src/lib/workspace/console/model.test.ts src/lib/workspace/console/alert-order.test.ts src/lib/workspace/console/turn-navigation.test.ts src/lib/workspace/console/run-status.test.ts src/lib/workspace/companion/api.test.ts tests/workdir-api.test.ts src/lib/workspace/settings/workdir-checkout.test.ts tests/workdir-removal.test.ts tests/workdir-permissions.test.ts src/lib/workspace/console/tasks.test.ts test/ticket-detail-route-reuse.test.ts test/spa-shell.test.ts test/objective-pages.test.ts test/repositories/ui.test.ts src/lib/workspace/console/worker-console.ui.test.ts src/lib/workspace/settings/model.test.ts tests/runtime-connection.test.ts tests/runtime-management.test.ts tests/runtime-management-source.test.ts src/lib/workspace/sidebar/override-stack.test.ts src/lib/workspace/sidebar/route-ownership.test.ts src/lib/workspace/sidebar/workers.test.ts src/lib/workspace/sidebar/workspace-switcher.test.ts src/lib/workspace/sidebar/worker-subscription.test.ts src/lib/workspace/sidebar/worker-workdir-meta.test.ts src/lib/workspace/sidebar/worker-launch.test.ts src/lib/workspace/workers/worker-launch.test.ts tests/runtime-workers.test.ts test/sidebar/worker-actions.test.ts src/lib/workspace/tickets/merge-request-resources.test.ts src/lib/workspace/tickets/ticket-panel.test.ts src/lib/workspace/tickets/ticket-search.test.ts test/merge-request-status.test.ts test/config-source/decodal-grammar.test.ts test/config-source/editor-state.test.ts test/config-source/fixed-schema-wrapper.test.ts test/config-source/toolchain.test.ts test/config-source/wasm-parity.test.ts test/config-source/api.test.ts tests/memory-api.test.ts tests/journal-api.test.ts test/repository-access/api.test.ts test/repository-access/loader.test.ts test/repository-access/model.test.ts test/repository-access/structure.test.ts test/repository-ssh-connection-ui.test.ts src/lib/workspace/drive/api.test.ts src/lib/workspace/drive/controller.test.ts src/lib/workspace/drive-ui/policy.test.ts",
+    "test": "deno test --allow-read=src,test,tests,../../docs,../../resources/config-schema --allow-env=LOG,VSCODE_TEXTMATE_DEBUG,NODE_ENV tests/workspace-model.test.ts tests/repository-api.test.ts tests/workspace-catalog.test.ts tests/profile-api.test.ts tests/skill-api.test.ts tests/tooltip-contract.test.ts tests/bevel-contract.test.ts tests/bevel-line-contract.test.ts tests/typography-contract.test.ts src/lib/workspace/navigation/deferred.test.ts src/lib/workspace/auth/model.test.ts src/lib/workspace/auth/login.test.ts src/lib/workspace/auth/routes.test.ts src/lib/workspace/auth/hosting.test.ts src/lib/workspace/auth/hosting-enrollment.test.ts src/lib/workspace/auth/activation.test.ts src/lib/workspace/auth/hosting-accounts.test.ts src/lib/workspace/protocol-validator.test.ts tests/auth-api.test.ts src/lib/workspace/api/http.test.ts src/lib/workspace/api/workers.test.ts src/lib/workspace/api/ticket-browser.test.ts src/lib/workspace/api/ticket-case.test.ts src/lib/workspace/api/ticket-operations.test.ts src/lib/workspace/header/breadcrumb-model.test.ts src/lib/workspace/console/chat-submit.test.ts src/lib/workspace/console/composer-delivery.test.ts test/composer-history.test.ts tests/composer-paste.test.ts src/lib/workspace/console/composer-command.test.ts src/lib/workspace/console/composer-draft.test.ts src/lib/workspace/console/composer-completion.test.ts src/lib/workspace/console/composer-invocation.test.ts src/lib/workspace/console/file-completions.test.ts test/console/ansi.test.ts src/lib/workspace/console/history.test.ts src/lib/workspace/console/model.test.ts src/lib/workspace/console/alert-order.test.ts src/lib/workspace/console/turn-navigation.test.ts src/lib/workspace/console/run-status.test.ts src/lib/workspace/companion/api.test.ts tests/workdir-api.test.ts src/lib/workspace/settings/workdir-checkout.test.ts tests/workdir-removal.test.ts tests/workdir-permissions.test.ts src/lib/workspace/console/tasks.test.ts test/ticket-detail-route-reuse.test.ts test/spa-shell.test.ts test/objective-pages.test.ts test/repositories/ui.test.ts src/lib/workspace/console/worker-console.ui.test.ts src/lib/workspace/settings/model.test.ts tests/runtime-connection.test.ts tests/runtime-management.test.ts tests/runtime-management-source.test.ts src/lib/workspace/sidebar/override-stack.test.ts src/lib/workspace/sidebar/route-ownership.test.ts src/lib/workspace/sidebar/workers.test.ts src/lib/workspace/sidebar/workspace-switcher.test.ts src/lib/workspace/sidebar/worker-subscription.test.ts src/lib/workspace/sidebar/worker-workdir-meta.test.ts src/lib/workspace/sidebar/worker-launch.test.ts src/lib/workspace/workers/worker-launch.test.ts tests/runtime-workers.test.ts test/sidebar/worker-actions.test.ts src/lib/workspace/tickets/merge-request-resources.test.ts src/lib/workspace/tickets/ticket-panel.test.ts src/lib/workspace/tickets/ticket-search.test.ts test/merge-request-status.test.ts test/config-source/decodal-grammar.test.ts test/config-source/editor-state.test.ts test/config-source/fixed-schema-wrapper.test.ts test/config-source/toolchain.test.ts test/config-source/wasm-parity.test.ts test/config-source/api.test.ts tests/memory-api.test.ts tests/subject-delete.test.ts tests/journal-api.test.ts test/repository-access/api.test.ts test/repository-access/loader.test.ts test/repository-access/model.test.ts test/repository-access/structure.test.ts test/repository-ssh-connection-ui.test.ts src/lib/workspace/drive/api.test.ts src/lib/workspace/drive/controller.test.ts src/lib/workspace/drive-ui/policy.test.ts",
     "test:journal:backend-contract": "cd ../.. && mkdir -p target && cargo test -p yoi-workspace-server --lib journal_browser_web_contract -- --nocapture > target/journal-browser-contract.log && cd web/workspace && deno run --allow-read=../../target/journal-browser-contract.log test/journal-backend-contract.ts ../../target/journal-browser-contract.log",
     "test:component": "deno run -A npm:vitest@5.0.3 run --config vitest.config.ts",
     "test:browser:activation": "mkdir -p ../../target/web-ux/tmp && TMPDIR=../../target/web-ux/tmp deno test --config ../../tools/web-ux/deno.json --allow-env --allow-net --allow-read --allow-write --allow-run --allow-sys test/activation-browser/activation-shell.browser.test.ts",

web/workspace/deno.lock

@@ -3,6 +3,7 @@
   "specifiers": {
     "jsr:@std/assert@*": "1.0.19",
     "jsr:@std/internal@^1.0.12": "1.0.14",
+    "jsr:@std/path@1.1.4": "1.1.4",
     "npm:@codemirror/autocomplete@6.20.3": "6.20.3",
     "npm:@codemirror/commands@6.11.1": "6.11.1",
     "npm:@codemirror/language@6.12.4": "6.12.4",
@@ -42,6 +43,12 @@
     },
     "@std/internal@1.0.14": {
       "integrity": "291516b3d4c35024d6ffbc0a9df5bf4c64116e05b50012cf846710152d2ffdf7"
+    },
+    "@std/path@1.1.4": {
+      "integrity": "1d2d43f39efb1b42f0b1882a25486647cb851481862dc7313390b2bb044314b5",
+      "dependencies": [
+        "jsr:@std/internal"
+      ]
     }
   },
   "npm": {

web/workspace/src/lib/generated/companion-api.ts

@@ -1,6 +1,6 @@
 // @generated by yoi-companion-openapi-typescript@1. Do not edit.
 // Input: openapi/server-api.json
-// Input contract: 0.1.0 (sha256:7e640cff6bdcf6dc298cfca695c5cb71a520288b20f4f29ec8df8138724b97c4)
+// Input contract: 0.1.0 (sha256:fc3064f2d7b0d2c2b11e166007943b0cac0cad0918e34d071e20079cf38d655e)
 // Options: companion-operation-schema-closure,openapi-3.1,strict-integer-ranges,sorted-output
 // Output: web/workspace/src/lib/generated/companion-api.ts
 // Regenerate/check: cargo run -q -p server-api --example generate_companion_api_types -- --check

web/workspace/src/lib/generated/legacy-server-api.ts

@@ -52,6 +52,10 @@ export type WorkspacePermissionSummary = {
   manage_secrets: boolean;
   manage_runtimes: boolean;
   delete_workspace: boolean;
+  /**
+   * Explicit Subject deletion authority for the current authenticated actor.
+   */
+  delete_subjects: boolean;
 };
 
 export type WorkspaceDeletionState =

web/workspace/src/lib/generated/memory-api.ts

@@ -118,6 +118,14 @@ export type SubjektivSubjectCreateRequest = {
   behavior_md?: string;
 };
 
+export type SubjektivSubjectDeleteRequest = { operation_id: string };
+
+export type SubjektivSubjectDeleteResponse = {
+  subject_id: string;
+  operation_id: string;
+  completed: boolean;
+};
+
 export type SubjektivSubjectBehaviorUpdateRequest = {
   expected_behavior_md: string;
   behavior_md: string;

web/workspace/src/lib/generated/repository-api.ts

@@ -1,6 +1,6 @@
 // @generated by yoi-repository-openapi-typescript@1. Do not edit.
 // Input: openapi/server-api.json
-// Input contract: 0.1.0 (sha256:7e640cff6bdcf6dc298cfca695c5cb71a520288b20f4f29ec8df8138724b97c4)
+// Input contract: 0.1.0 (sha256:fc3064f2d7b0d2c2b11e166007943b0cac0cad0918e34d071e20079cf38d655e)
 // Options: repository-operation-schema-closure,openapi-3.1,format:uint64=safe-number,strict-safe-integers,sorted-output
 // Output: web/workspace/src/lib/generated/repository-api.ts
 // Regenerate/check: cargo run -q -p server-api --example generate_repository_openapi_types -- --check

web/workspace/src/lib/generated/runtime-api.ts

@@ -1,6 +1,6 @@
 // @generated by yoi-runtime-openapi-typescript@1. Do not edit.
 // Input: openapi/server-api.json
-// Input contract: 0.1.0 (sha256:7e640cff6bdcf6dc298cfca695c5cb71a520288b20f4f29ec8df8138724b97c4)
+// Input contract: 0.1.0 (sha256:fc3064f2d7b0d2c2b11e166007943b0cac0cad0918e34d071e20079cf38d655e)
 // Options: runtime-operation-schema-closure,openapi-3.1,strict-integer-ranges,sorted-output
 // Output: web/workspace/src/lib/generated/runtime-api.ts
 // Regenerate/check: cargo run -q -p server-api --example generate_runtime_api_types -- --check

web/workspace/src/lib/generated/ticket-api.ts

@@ -1,6 +1,6 @@
 // @generated by yoi-ticket-browser-openapi-typescript@1. Do not edit.
 // Input: openapi/server-api.json
-// Input contract: 0.1.0 (sha256:7e640cff6bdcf6dc298cfca695c5cb71a520288b20f4f29ec8df8138724b97c4)
+// Input contract: 0.1.0 (sha256:fc3064f2d7b0d2c2b11e166007943b0cac0cad0918e34d071e20079cf38d655e)
 // Options: ticket-objective-merge-request-browser-operation-schema-closure,openapi-3.1,strict-integer-ranges,sorted-output
 // Output: web/workspace/src/lib/generated/ticket-api.ts
 // Regenerate/check: cargo run -q -p server-api --example generate_ticket_api_types -- --check

web/workspace/src/lib/generated/worker-launch-api.ts

@@ -1,6 +1,6 @@
 // @generated by yoi-worker-openapi-typescript@1. Do not edit.
 // Input: openapi/server-api.json
-// Input contract: 0.1.0 (sha256:7e640cff6bdcf6dc298cfca695c5cb71a520288b20f4f29ec8df8138724b97c4)
+// Input contract: 0.1.0 (sha256:fc3064f2d7b0d2c2b11e166007943b0cac0cad0918e34d071e20079cf38d655e)
 // Options: worker-operation-schema-closure,openapi-3.1,strict-integer-ranges,sorted-output
 // Output: web/workspace/src/lib/generated/worker-launch-api.ts
 // Regenerate/check: cargo run -q -p server-api --example generate_worker_launch_api_types -- --check

web/workspace/src/lib/workspace/api/workspace-model.ts

@@ -482,6 +482,7 @@ function permissions(value: unknown, path: string): WorkspacePermissionSummary {
       "manage_secrets",
       "manage_runtimes",
       "delete_workspace",
+      "delete_subjects",
     ],
     path,
   );
@@ -492,6 +493,7 @@ function permissions(value: unknown, path: string): WorkspacePermissionSummary {
     ),
     manage_secrets: boolean(item.manage_secrets, `${path}.manage_secrets`),
     manage_runtimes: boolean(item.manage_runtimes, `${path}.manage_runtimes`),
+    delete_subjects: boolean(item.delete_subjects, `${path}.delete_subjects`),
     delete_workspace: boolean(
       item.delete_workspace,
       `${path}.delete_workspace`,

web/workspace/src/lib/workspace/memory/SubjectDelete.svelte

@@ -0,0 +1,134 @@
+<script lang="ts">
+  import { untrack } from 'svelte';
+  import { deleteSubjektivSubject, SubjektivSubjectDeleteError } from './api.ts';
+  import { clearSubjectDeleteAttempt, readSubjectDeleteAttempt, saveSubjectDeleteAttempt, type SubjectDeleteAttempt } from './subject-delete.ts';
+  import type { SubjektivSubjectResponse } from '#lib/generated/memory-api.ts';
+  import { workspaceRoute } from '#lib/workspace/api/http.ts';
+
+  let { workspaceId, subjectId, subject, onstarted }: {
+    workspaceId: string;
+    subjectId: string;
+    subject: SubjektivSubjectResponse | null;
+    onstarted: () => void;
+  } = $props();
+  let attempt = $state<SubjectDeleteAttempt | null>(null);
+  let phase = $state<'idle' | 'confirming' | 'running' | 'pending' | 'unknown' | 'failed' | 'completed'>('idle');
+  let confirmed = $state(false);
+  let error = $state<string | null>(null);
+  let storageError = $state(false);
+  let identity = '';
+  let generation = 0;
+
+  $effect(() => {
+    const next = JSON.stringify([workspaceId, subjectId]);
+    untrack(() => {
+      if (identity === next) return;
+      identity = next;
+      generation += 1;
+      attempt = null;
+      phase = 'idle';
+      confirmed = false;
+      error = null;
+      storageError = false;
+      try {
+        attempt = readSubjectDeleteAttempt(sessionStorage, workspaceId, subjectId);
+        if (attempt) {
+          phase = 'unknown';
+          onstarted();
+        }
+      } catch (cause) {
+        storageError = true;
+        error = cause instanceof Error ? cause.message : 'Cannot read the saved deletion request. Do not start a new request.';
+      }
+    });
+  });
+
+  async function submit(): Promise<void> {
+    if (phase === 'running' || phase === 'completed' || storageError || (!attempt && (!subject || !confirmed))) return;
+    const currentGeneration = generation;
+    const targetWorkspace = workspaceId;
+    const targetSubject = subjectId;
+    const request = attempt ?? { subjectId: targetSubject, operationId: crypto.randomUUID() };
+    const current = () => currentGeneration === generation && targetWorkspace === workspaceId && targetSubject === subjectId;
+    // 保存に失敗したら送らない。応答喪失後に新しいkeyを作る経路を残さない。
+    try { saveSubjectDeleteAttempt(sessionStorage, targetWorkspace, request); }
+    catch {
+      error = 'The retry identity could not be saved in this tab. No deletion request was sent. Allow session storage and try again.';
+      return;
+    }
+    attempt = request;
+    phase = 'running';
+    error = null;
+    onstarted();
+    try {
+      const result = await deleteSubjektivSubject(fetch, targetWorkspace, targetSubject, { operation_id: request.operationId });
+      // 対象変更後の遅延応答は新対象を更新せず、成功した旧対象の再送入力だけ消去する。
+      if (result.completed) {
+        try { clearSubjectDeleteAttempt(sessionStorage, targetWorkspace, targetSubject); }
+        catch { /* 消去できなくても残るのは同一keyだけ。本文や成功状態は保存しない。 */ }
+      }
+      if (!current()) return;
+      phase = result.completed ? 'completed' : 'pending';
+    } catch (cause) {
+      if (!current()) return;
+      phase = cause instanceof SubjektivSubjectDeleteError && cause.kind === 'rejected' ? 'failed' : 'unknown';
+      error = cause instanceof Error ? cause.message : 'The deletion outcome is unknown.';
+    }
+  }
+</script>
+
+{#if subject || attempt || storageError}
+  <section class="subject-deletion" aria-labelledby="subject-delete-heading" data-delete-state={phase}>
+    <header>
+      <h2 id="subject-delete-heading">Delete Subject</h2>
+      {#if phase === 'idle' && !storageError}
+        <button type="button" class="workspace-secondary-button subject-delete-open" onclick={() => { phase = 'confirming'; }}>Delete Subject…</button>
+      {/if}
+    </header>
+    {#if phase === 'confirming' || attempt}
+      <p class="delete-target">Target: <strong>{subject?.role ?? subjectId}</strong> · <code>{subjectId}</code></p>
+    {/if}
+    {#if phase === 'confirming'}
+      <form onsubmit={(event) => { event.preventDefault(); void submit(); }}>
+        <p><strong>This is irreversible.</strong> This Subject, its behavior, Memory, change history, staging, Surface, Journal, permissions, delegations, Writer/Session associations, and Subject Job inputs/results will be deleted. Connected and delegated Workers and Jobs must stop before completion can be confirmed.</p>
+        <p>Original Worker/Session text, existing archives and Workdirs, Tickets, and other separately retained resources are <strong>not deleted</strong>. Minimal deletion retry/audit metadata is retained. Other Subjects and Workspaces are not affected.</p>
+        <label class="delete-confirm"><input type="checkbox" bind:checked={confirmed} /> I have checked the target, deletion scope, retained data, and irreversible effect.</label>
+        <div class="delete-actions">
+          <button type="submit" class="workspace-danger-button" disabled={!confirmed}>Permanently delete Subject</button>
+          <button type="button" class="workspace-secondary-button" onclick={() => { phase = 'idle'; confirmed = false; }}>Cancel</button>
+        </div>
+      </form>
+    {:else if phase === 'running'}
+      <p role="status">Deleting… Waiting for stop and erasure confirmation. Do not treat this as completed.</p>
+    {:else if phase === 'pending'}
+      <p role="status"><strong>Deletion started; completion unconfirmed.</strong> The deletion fence is saved and the Subject is hidden from reads/lists. External stopping or erasure is not yet confirmed. Retry the same request to continue.</p>
+    {:else if phase === 'unknown'}
+      <p role="status"><strong>Deletion outcome unknown.</strong> The request may already have taken effect. The saved target and operation ID are retained; retry the same request, not a new deletion.</p>
+    {:else if phase === 'failed'}
+      <p role="alert"><strong>Deletion request rejected.</strong> Completion is not confirmed. Resolve the reported condition, then retry the same request.</p>
+    {:else if phase === 'completed'}
+      <p role="status"><strong>Subject deletion completed.</strong> Backend confirmed stopping and deletion of Subject-owned data. Separately retained Worker/Session text, archives, Workdirs, and Tickets remain.</p>
+      <a href={workspaceRoute(workspaceId, '/memory')}>Back to subjects →</a>
+    {/if}
+    {#if error}<p class="workspace-callout is-error" role="alert">{error}</p>{/if}
+    {#if attempt && phase !== 'completed'}
+      <details><summary>Deletion request identity</summary><code>{attempt.operationId}</code><p>This tab retains the target and same request ID across reloads, even when GET can no longer find the Subject.</p></details>
+      {#if phase === 'pending' || phase === 'unknown' || phase === 'failed'}
+        <button type="button" class="workspace-secondary-button subject-delete-retry" onclick={() => { void submit(); }}>Retry same deletion request</button>
+      {/if}
+    {/if}
+  </section>
+{/if}
+
+<style>
+  .subject-deletion { min-width: 0; }
+  header { display: flex; align-items: center; justify-content: space-between; gap: .75rem; flex-wrap: wrap; }
+  h2 { font-size: var(--font-size-body); margin: 0; }
+  p { line-height: 1.6; }
+  code, .delete-target { overflow-wrap: anywhere; }
+  .delete-confirm { display: flex; align-items: flex-start; gap: .6rem; line-height: 1.5; }
+  input { margin-top: .25rem; flex: 0 0 auto; }
+  .delete-actions { display: flex; gap: .75rem; flex-wrap: wrap; margin-top: 1rem; }
+  details { margin-block: 1rem; }
+  summary { cursor: pointer; }
+</style>

web/workspace/src/lib/workspace/memory/api.ts

@@ -29,6 +29,8 @@ import type {
   SubjektivResidentSurfaceAvailability,
   SubjektivResidentSurfaceResponse,
   SubjektivResidentSurfaceSnapshot,
+  SubjektivSubjectDeleteRequest,
+  SubjektivSubjectDeleteResponse,
   SubjektivSubjectBehaviorUpdateRequest,
   SubjektivSubjectCreateRequest,
   SubjektivSubjectListResponse,
@@ -158,6 +160,70 @@ function validateSubjectBehavior(behaviorMd: string): void {
   }
 }
 
+export class SubjektivSubjectDeleteError extends Error {
+  constructor(
+    readonly kind: "rejected" | "unknown_outcome",
+    message: string,
+    readonly status: number | null = null,
+  ) {
+    super(message);
+    this.name = "SubjektivSubjectDeleteError";
+  }
+}
+
+export function parseSubjektivSubjectDeleteResponse(
+  value: unknown,
+  subjectId: string,
+  operationId: string,
+): SubjektivSubjectDeleteResponse {
+  const record = strictRecord(value, ["subject_id", "operation_id", "completed"], "Subject deletion");
+  const response = {
+    subject_id: requiredIdentifier(record, "subject_id"),
+    operation_id: requiredIdentifier(record, "operation_id"),
+    completed: requiredBoolean(record, "completed"),
+  };
+  if (response.subject_id !== subjectId || response.operation_id !== operationId) {
+    invalid("Subject deletion response does not match the request");
+  }
+  return response;
+}
+
+/** HTTP success can confirm only the deletion fence. Every retry retains this request. */
+export async function deleteSubjektivSubject(
+  fetchFn: typeof fetch,
+  workspaceId: string,
+  subjectId: string,
+  request: SubjektivSubjectDeleteRequest,
+): Promise<SubjektivSubjectDeleteResponse> {
+  identifier(request.operation_id, "operation_id");
+  let response: Response;
+  try {
+    response = await fetchFn(workspaceApiPath(workspaceId, `/subjektiv/subjects/${encodeURIComponent(subjectId)}`), {
+      method: "DELETE",
+      headers: { "content-type": "application/json" },
+      body: JSON.stringify({ operation_id: request.operation_id }),
+    });
+  } catch {
+    throw new SubjektivSubjectDeleteError("unknown_outcome", "The deletion outcome is unknown. Retry the same request.");
+  }
+  if (!response.ok) {
+    throw new SubjektivSubjectDeleteError(
+      response.status >= 500 ? "unknown_outcome" : "rejected",
+      await subjektivSubjectCreateErrorMessage(response),
+      response.status,
+    );
+  }
+  try {
+    return parseSubjektivSubjectDeleteResponse(
+      await readBoundedJson(response, MEMORY_API_LIMITS.maxResponseBytes),
+      subjectId,
+      request.operation_id,
+    );
+  } catch {
+    throw new SubjektivSubjectDeleteError("unknown_outcome", "The deletion response could not be confirmed. Retry the same request.");
+  }
+}
+
 export async function createSubjektivSubject(
   fetchFn: typeof fetch,
   workspaceId: string,

web/workspace/src/lib/workspace/memory/subject-delete.ts

@@ -0,0 +1,51 @@
+// 削除開始後はGETから対象が消えるため、同じtabでの再読込みにも依頼IDを保持する。
+// Subject本文は保存しない。これは削除結果の正本ではなく、安全な再送用の最小入力。
+export type SubjectDeleteAttempt = {
+  subjectId: string;
+  operationId: string;
+};
+export function subjectDeleteStorageKey(
+  workspaceId: string,
+  subjectId: string,
+): string {
+  return `yoi.subject-delete:${JSON.stringify([workspaceId, subjectId])}`;
+}
+export function readSubjectDeleteAttempt(
+  storage: Pick<Storage, "getItem">,
+  workspaceId: string,
+  subjectId: string,
+): SubjectDeleteAttempt | null {
+  const raw = storage.getItem(subjectDeleteStorageKey(workspaceId, subjectId));
+  if (raw === null) return null;
+  const value = JSON.parse(raw);
+  if (
+    !value || value.subjectId !== subjectId ||
+    typeof value.operationId !== "string" ||
+    value.operationId.length === 0 ||
+    Object.keys(value).some((key) =>
+      key !== "subjectId" && key !== "operationId"
+    )
+  ) {
+    throw new Error(
+      "The saved deletion request cannot be read. Do not start another deletion request.",
+    );
+  }
+  return value;
+}
+export function saveSubjectDeleteAttempt(
+  storage: Pick<Storage, "setItem">,
+  workspaceId: string,
+  attempt: SubjectDeleteAttempt,
+): void {
+  storage.setItem(
+    subjectDeleteStorageKey(workspaceId, attempt.subjectId),
+    JSON.stringify(attempt),
+  );
+}
+export function clearSubjectDeleteAttempt(
+  storage: Pick<Storage, "removeItem">,
+  workspaceId: string,
+  subjectId: string,
+): void {
+  storage.removeItem(subjectDeleteStorageKey(workspaceId, subjectId));
+}

web/workspace/src/routes/w/[workspaceId]/memory/PageContent.svelte

@@ -38,7 +38,7 @@
   }
 
   function subjectStateLabel(state: SubjektivSubjectResponse['state']): string {
-    return state === 'active' ? 'Available' : 'Retired';
+    return state === 'active' ? 'Available' : 'Legacy ended Subject';
   }
 
   async function openCreateForm(): Promise<void> {

web/workspace/src/routes/w/[workspaceId]/memory/[subjectId]/PageContent.svelte

@@ -6,6 +6,7 @@
   // 実行中Workerの履歴へ反映済みであることの証明には使わない。診断値は詳細へ分離する。
   import { untrack } from 'svelte';
   import DocumentMarkdown from '#lib/workspace/markdown/DocumentMarkdown.svelte';
+  import SubjectDelete from '#lib/workspace/memory/SubjectDelete.svelte';
   import { formatDate, workspaceRoute } from '#lib/workspace/api/http.ts';
   import {
     SubjektivSubjectCreateError,
@@ -26,6 +27,7 @@
   let behaviorSaving = $state(false);
   let behaviorError = $state<string | null>(null);
   let behaviorSaveConfirmed = $state(false);
+  let deletionStarted = $state(false);
 
   let routeGeneration = 0;
   let subjectWorkspaceId = untrack(() => data.workspaceId);
@@ -49,6 +51,7 @@
       behaviorSaving = false;
       behaviorError = null;
       behaviorSaveConfirmed = false;
+      deletionStarted = false;
     });
   });
 
@@ -149,7 +152,7 @@
   }
 
   function subjectStateLabel(state: 'active' | 'retired'): string {
-    return state === 'active' ? 'Available' : 'Retired';
+    return state === 'active' ? 'Available' : 'Legacy ended Subject';
   }
 </script>
 
@@ -167,9 +170,16 @@
       <h1 id="subject-heading">{subject?.role ?? data.subjectId}</h1>
       <code class="subject-id" title={data.subjectId}>{data.subjectId}</code>
     </div>
-    <span class="read-only-label">Behavior editable</span>
+    {#if !deletionStarted}<span class="read-only-label">Behavior editable</span>{/if}
   </header>
 
+  {#if data.workspace.permissions.delete_subjects}
+    {#key JSON.stringify([data.workspaceId, data.subjectId])}
+      <SubjectDelete workspaceId={data.workspaceId} subjectId={data.subjectId} {subject} onstarted={() => { deletionStarted = true; }} />
+    {/key}
+  {/if}
+
+  {#if !deletionStarted}
   <nav aria-label="Subjectの記録"><a href={workspaceRoute(data.workspaceId, `/memory/${encodeURIComponent(data.subjectId)}/journal`)}>Journal · 最近の出来事とSessionを探す →</a></nav>
 
   {#if subject}
@@ -388,6 +398,7 @@
       <div class="memory-state" role="status"><p>Current Memory data is unavailable.</p></div>
     {/if}
   </section>
+  {/if}
 </section>
 
 <style>

web/workspace/test/subject-delete-browser/fixture-server.ts

@@ -0,0 +1,142 @@
+// 本番Web buildと合成HTTP境界を接続する。実認証・削除の永続性はBackend suiteの責務。
+import { join, resolve } from "jsr:@std/path@1.1.4";
+const [portText, build, mode] = Deno.args;
+const port = Number(portText);
+const root = resolve(import.meta.dirname!, "../../../..");
+const upstreamPort = port + 1;
+const upstream = new Deno.Command(Deno.execPath(), {
+  args: [
+    "run",
+    "-A",
+    join(root, "tools/web-ux/browser-tests/memory_document_fixture_server.ts"),
+    String(upstreamPort),
+    resolve(build),
+    "3",
+  ],
+  stdout: "null",
+  stderr: "inherit",
+}).spawn();
+const stop = () => {
+  try {
+    upstream.kill();
+  } catch { /* already stopped */ }
+};
+Deno.addSignalListener("SIGTERM", () => {
+  stop();
+  Deno.exit();
+});
+Deno.addSignalListener("SIGINT", () => {
+  stop();
+  Deno.exit();
+});
+const attempts = new Map<string, string>();
+const hidden = new Set<string>();
+const user = {
+  user_id: "fixture-user",
+  account_id: "owner",
+  handle: "owner",
+  display_name: "Memory owner",
+};
+const apiRoot = "/api/w/memory-review";
+Deno.serve({ hostname: "127.0.0.1", port }, async (request) => {
+  const url = new URL(request.url);
+  if (url.pathname === "/health") {
+    try {
+      return await fetch(`http://127.0.0.1:${upstreamPort}/health`);
+    } catch {
+      return new Response(null, { status: 503 });
+    }
+  }
+  if (url.pathname === "/api/auth/whoami") {
+    return Response.json({
+      authentication_reference: "subject-delete-fixture",
+      actor: { ...user, auth_method: "browser_session" },
+      session: { kind: "authenticated", expires_at: "2099-01-01T00:00:00Z" },
+    });
+  }
+  const sessionId =
+    request.headers.get("cookie")?.match(/delete-review-session=([^;]+)/)
+      ?.[1] ?? crypto.randomUUID();
+  const reader =
+    request.headers.get("cookie")?.includes("subject-delete-persona=reader") ??
+      false;
+  const match = url.pathname.match(/\/subjektiv\/subjects\/([^/]+)(?:\/|$)/);
+  const id = match ? decodeURIComponent(match[1]) : null;
+  const key = JSON.stringify([sessionId, id]);
+  if (request.method === "DELETE" && id) {
+    if (reader) {
+      return Response.json({ error: "forbidden", message: "Owner required" }, {
+        status: 403,
+      });
+    }
+    const body = await request.json();
+    const prior = attempts.get(key);
+    if (prior && prior !== body.operation_id) {
+      return Response.json(
+        { error: "conflict", message: "Changed operation" },
+        { status: 409 },
+      );
+    }
+    attempts.set(key, body.operation_id);
+    hidden.add(key);
+    if (!prior && id === "unknown-subject") {
+      return Response.json({
+        error: "internal",
+        message: "Response lost after fence",
+      }, { status: 500 });
+    }
+    return Response.json({
+      subject_id: id,
+      operation_id: body.operation_id,
+      completed: !!prior,
+    });
+  }
+  if (id && request.method === "GET" && hidden.has(key)) {
+    return Response.json(
+      { error: "not_found", message: "Subject unavailable" },
+      { status: 404 },
+    );
+  }
+  const mapped = id &&
+    ["pending-subject", "unknown-subject", "legacy-subject"].includes(id);
+  const target = new URL(request.url);
+  target.port = String(upstreamPort);
+  if (mapped) {
+    target.pathname = target.pathname.replace(
+      encodeURIComponent(id!),
+      "empty-subject",
+    );
+  }
+  let response = await fetch(new Request(target, request));
+  if (url.pathname === `${apiRoot}/workspace` || mapped) {
+    const data = await response.json();
+    if (url.pathname === `${apiRoot}/workspace` && mode !== "before") {
+      data.permissions.delete_subjects = !reader;
+    }
+    if (mapped) {
+      if ("id" in data) {
+        data.id = id;
+        data.role = `Deletion review · ${id}`;
+        if (id === "legacy-subject") data.state = "retired";
+      }
+      if ("subject_id" in data) data.subject_id = id;
+    }
+    response = Response.json(data, { status: response.status });
+  }
+  response = new Response(response.body, {
+    status: response.status,
+    headers: response.headers,
+  });
+  const persona = url.searchParams.get("persona");
+  if (persona) {
+    response.headers.set(
+      "set-cookie",
+      `subject-delete-persona=${persona}; Path=/; HttpOnly; SameSite=Lax`,
+    );
+  }
+  response.headers.append(
+    "set-cookie",
+    `delete-review-session=${sessionId}; Path=/; HttpOnly; SameSite=Lax`,
+  );
+  return response;
+});

web/workspace/test/subject-delete-browser/subject-delete.browser.test.ts

@@ -0,0 +1,257 @@
+import { assert, assertEquals } from "@std/assert";
+import { chromium, type Page } from "playwright";
+import { join, resolve } from "@std/path";
+import {
+  assertNoPageWideOverflow,
+  freePort,
+  waitForServer,
+} from "../../../../tools/web-ux/browser-tests/memory_document_harness.ts";
+
+const root = resolve(import.meta.dirname!, "../../../..");
+const artifact = join(root, "target/web-ux/t786-browser");
+async function confirm(page: Page) {
+  await page.locator(".subject-delete-open").click();
+  const button = page.getByRole("button", {
+    name: "Permanently delete Subject",
+    exact: true,
+  });
+  assert(await button.isDisabled());
+  await page.getByRole("checkbox").check();
+  await button.click();
+}
+Deno.test({
+  name:
+    "Subject deletion shell: owner confirmation, pending/reload/retry, unknown/rejected and route fencing",
+  sanitizeOps: false,
+  sanitizeResources: false,
+  fn: async () => {
+    const build = await new Deno.Command(Deno.execPath(), {
+      args: ["task", "build"],
+      cwd: join(root, "web/workspace"),
+      stdout: "null",
+      stderr: "piped",
+    }).output();
+    assert(build.success, new TextDecoder().decode(build.stderr));
+    const port = await freePort();
+    const server = new Deno.Command(Deno.execPath(), {
+      args: [
+        "run",
+        "-A",
+        join(import.meta.dirname!, "fixture-server.ts"),
+        String(port),
+        join(root, "web/workspace/build"),
+      ],
+      stdout: "null",
+      stderr: "inherit",
+    }).spawn();
+    const origin = `http://127.0.0.1:${port}`;
+    await Deno.mkdir(artifact, { recursive: true });
+    const browser = await chromium.launch();
+    try {
+      await waitForServer(`${origin}/health`);
+      for (const theme of ["light", "dark"] as const) {
+        for (const width of [1440, 768, 390]) {
+          const context = await browser.newContext({
+            viewport: { width, height: 900 },
+            colorScheme: theme,
+          });
+          const page = await context.newPage();
+          const pageErrors: string[] = [];
+          page.on("pageerror", (error) => pageErrors.push(error.message));
+          const requests: unknown[] = [];
+          let release!: () => void;
+          const held = new Promise<void>((resolve) => {
+            release = resolve;
+          });
+          await page.route(
+            "**/subjektiv/subjects/pending-subject",
+            async (route) => {
+              if (route.request().method() !== "DELETE") {
+                return route.continue();
+              }
+              requests.push(route.request().postDataJSON());
+              if (requests.length === 1) await held;
+              await route.continue();
+            },
+          );
+          await page.goto(`${origin}/w/memory-review/memory/pending-subject`);
+          await page.locator(".subject-delete-open").waitFor();
+          await page.screenshot({
+            path: join(artifact, `${theme}-${width}-initial.png`),
+          });
+          await page.locator(".subject-delete-open").click();
+          assert(
+            await page.getByText("This is irreversible.", { exact: true })
+              .isVisible(),
+          );
+          await assertNoPageWideOverflow(page);
+          await page.screenshot({
+            path: join(artifact, `${theme}-${width}-confirmation.png`),
+          });
+          await page.getByRole("button", { name: "Cancel", exact: true })
+            .click();
+          assertEquals(requests.length, 0);
+          await confirm(page);
+          await page.locator('[data-delete-state="running"]').waitFor();
+          assertEquals(await page.locator(".subject-overview").count(), 0);
+          await page.screenshot({
+            path: join(artifact, `${theme}-${width}-running.png`),
+          });
+          release();
+          await page.locator('[data-delete-state="pending"]').waitFor();
+          assertEquals(requests.length, 1);
+          const saved = await page.evaluate(() =>
+            Object.keys(sessionStorage).filter((key) =>
+              key.startsWith("yoi.subject-delete:")
+            ).map((key) => JSON.parse(sessionStorage.getItem(key)!))
+          );
+          assertEquals(saved, [{
+            subjectId: "pending-subject",
+            operationId: (requests[0] as { operation_id: string }).operation_id,
+          }]);
+          await page.screenshot({
+            path: join(artifact, `${theme}-${width}-pending.png`),
+          });
+          await page.reload();
+          await page.locator('[data-delete-state="unknown"]').waitFor();
+          assertEquals(await page.locator(".subject-overview").count(), 0);
+          await page.locator(".subject-delete-retry").click();
+          await page.locator('[data-delete-state="completed"]').waitFor();
+          assertEquals(requests.length, 2);
+          assertEquals(requests[0], requests[1]);
+          assertEquals(
+            await page.evaluate(() =>
+              Object.keys(sessionStorage).filter((key) =>
+                key.startsWith("yoi.subject-delete:")
+              )
+            ),
+            [],
+          );
+          await page.screenshot({
+            path: join(artifact, `${theme}-${width}-completed.png`),
+          });
+          await assertNoPageWideOverflow(page);
+          assertEquals(pageErrors, []);
+          await context.close();
+        }
+      }
+      for (const subject of ["unknown-subject", "legacy-subject"]) {
+        const page = await browser.newPage();
+        const requests: unknown[] = [];
+        page.on("request", (request) => {
+          if (request.method() === "DELETE") {
+            requests.push(request.postDataJSON());
+          }
+        });
+        await page.goto(`${origin}/w/memory-review/memory/${subject}`);
+        await page.locator(".subject-delete-open").waitFor();
+        if (subject === "legacy-subject") {
+          assert(
+            await page.getByText("Legacy ended Subject", { exact: true })
+              .isVisible(),
+          );
+        }
+        await confirm(page);
+        await page.locator(
+          `[data-delete-state="${
+            subject === "unknown-subject" ? "unknown" : "pending"
+          }"]`,
+        ).waitFor();
+        await page.locator(".subject-delete-retry").click();
+        await page.locator('[data-delete-state="completed"]').waitFor();
+        assertEquals(requests.length, 2);
+        assertEquals(requests[0], requests[1]);
+        await page.close();
+      }
+      // 4xxでもkeyを捨てない。権限の変化を新しい依頼へ置換しない。
+      {
+        const page = await browser.newPage();
+        const requests: unknown[] = [];
+        await page.route(
+          "**/subjektiv/subjects/pending-subject",
+          async (route) => {
+            if (route.request().method() !== "DELETE") return route.continue();
+            requests.push(route.request().postDataJSON());
+            if (requests.length === 1) {
+              await route.fulfill({
+                status: 403,
+                json: { error: "forbidden", message: "Permission changed" },
+              });
+            } else {await route.fulfill({
+                json: {
+                  subject_id: "pending-subject",
+                  operation_id: (requests[0] as any).operation_id,
+                  completed: true,
+                },
+              });}
+          },
+        );
+        await page.goto(`${origin}/w/memory-review/memory/pending-subject`);
+        await confirm(page);
+        await page.locator('[data-delete-state="failed"]').waitFor();
+        await page.screenshot({ path: join(artifact, "rejected.png") });
+        await page.locator(".subject-delete-retry").click();
+        await page.locator('[data-delete-state="completed"]').waitFor();
+        assertEquals(requests[0], requests[1]);
+        await page.close();
+      }
+      // 同一SPA内で他対象へ移動してから旧応答が届いても、新対象を消さない。
+      {
+        const page = await browser.newPage();
+        let release!: () => void;
+        const held = new Promise<void>((resolve) => {
+          release = resolve;
+        });
+        await page.route(
+          "**/subjektiv/subjects/pending-subject",
+          async (route) => {
+            if (route.request().method() !== "DELETE") return route.continue();
+            const body = route.request().postDataJSON();
+            await held;
+            await route.fulfill({
+              json: {
+                subject_id: "pending-subject",
+                operation_id: body.operation_id,
+                completed: true,
+              },
+            });
+          },
+        );
+        await page.goto(`${origin}/w/memory-review/memory/pending-subject`);
+        await confirm(page);
+        await page.locator('[data-delete-state="running"]').waitFor();
+        await page.getByRole("link", { name: "← All subjects", exact: true })
+          .click();
+        await page.locator(".subject-list a").first().click();
+        await page.locator(".subject-overview").waitFor();
+        const target = page.url();
+        const response = page.waitForResponse((r) =>
+          r.request().method() === "DELETE"
+        );
+        release();
+        await response;
+        assertEquals(page.url(), target);
+        assertEquals(
+          await page.locator('[data-delete-state="completed"]').count(),
+          0,
+        );
+        assertEquals(await page.locator(".subject-overview").count(), 1);
+        await page.close();
+      }
+      {
+        const page = await browser.newPage();
+        await page.goto(
+          `${origin}/w/memory-review/memory/legacy-subject?persona=reader`,
+        );
+        await page.locator(".subject-overview").waitFor();
+        assertEquals(await page.locator(".subject-deletion").count(), 0);
+        await page.screenshot({ path: join(artifact, "non-owner.png") });
+        await page.close();
+      }
+    } finally {
+      await browser.close();
+      server.kill("SIGTERM");
+      await server.status;
+    }
+  },
+});

web/workspace/tests/subject-delete.test.ts

@@ -0,0 +1,152 @@
+import {
+  deleteSubjektivSubject,
+  parseSubjektivSubjectDeleteResponse,
+  SubjektivSubjectDeleteError,
+} from "../src/lib/workspace/memory/api.ts";
+import {
+  clearSubjectDeleteAttempt,
+  readSubjectDeleteAttempt,
+  saveSubjectDeleteAttempt,
+  subjectDeleteStorageKey,
+} from "../src/lib/workspace/memory/subject-delete.ts";
+
+declare const Deno: {
+  test(name: string, fn: () => void | Promise<void>): void;
+};
+
+function equal(actual: unknown, expected: unknown) {
+  if (JSON.stringify(actual) !== JSON.stringify(expected)) {
+    throw new Error(
+      `Expected ${JSON.stringify(expected)}, got ${JSON.stringify(actual)}`,
+    );
+  }
+}
+Deno.test("Subject deletion uses DELETE with the same request after fence-only success", async () => {
+  const calls: unknown[] = [];
+  const fetcher = ((input, init) => {
+    calls.push([input, init]);
+    return Promise.resolve(
+      Response.json({
+        subject_id: "s/1",
+        operation_id: "same-operation",
+        completed: calls.length > 1,
+      }),
+    );
+  }) as typeof fetch;
+  for (const completed of [false, true]) {
+    equal(
+      await deleteSubjektivSubject(fetcher, "w/1", "s/1", {
+        operation_id: "same-operation",
+      }),
+      { subject_id: "s/1", operation_id: "same-operation", completed },
+    );
+  }
+  equal(calls[0], calls[1]);
+  equal(calls[0], ["/api/w/w%2F1/subjektiv/subjects/s%2F1", {
+    method: "DELETE",
+    headers: { "content-type": "application/json" },
+    body: '{"operation_id":"same-operation"}',
+  }]);
+});
+Deno.test("Subject deletion never confirms a malformed or wrong-target response", () => {
+  for (
+    const payload of [
+      { subject_id: "other", operation_id: "op", completed: true },
+      { subject_id: "s", operation_id: "other", completed: true },
+      { subject_id: "s", operation_id: "op", completed: "true" },
+      { subject_id: "s", operation_id: "op" },
+      { subject_id: "s", operation_id: "op", completed: true, extra: 1 },
+    ]
+  ) {
+    try {
+      parseSubjektivSubjectDeleteResponse(payload, "s", "op");
+    } catch {
+      continue;
+    }
+    throw new Error("Accepted an unconfirmed response");
+  }
+});
+Deno.test("Subject deletion classifies rejection separately from unknown transport/server/response outcomes", async () => {
+  for (
+    const item of [
+      {
+        fetcher: () => Promise.reject(new Error("lost")),
+        kind: "unknown_outcome",
+      },
+      {
+        fetcher: () =>
+          Promise.resolve(
+            Response.json({ error: "forbidden" }, { status: 403 }),
+          ),
+        kind: "rejected",
+      },
+      {
+        fetcher: () =>
+          Promise.resolve(
+            Response.json({ error: "conflict" }, { status: 409 }),
+          ),
+        kind: "rejected",
+      },
+      {
+        fetcher: () =>
+          Promise.resolve(
+            Response.json({ error: "uncertain" }, { status: 500 }),
+          ),
+        kind: "unknown_outcome",
+      },
+      {
+        fetcher: () =>
+          Promise.resolve(
+            Response.json({
+              subject_id: "wrong",
+              operation_id: "op",
+              completed: true,
+            }),
+          ),
+        kind: "unknown_outcome",
+      },
+    ]
+  ) {
+    try {
+      await deleteSubjektivSubject(item.fetcher as typeof fetch, "w", "s", {
+        operation_id: "op",
+      });
+    } catch (error) {
+      if (!(error instanceof SubjektivSubjectDeleteError)) throw error;
+      equal(error.kind, item.kind);
+      continue;
+    }
+    throw new Error("Unexpected success");
+  }
+});
+Deno.test("Retry input survives reload independently of Subject GET and is isolated by Workspace/Subject", () => {
+  const values = new Map<string, string>();
+  const storage = {
+    getItem: (key: string) => values.get(key) ?? null,
+    setItem: (key: string, value: string) => {
+      values.set(key, value);
+    },
+    removeItem: (key: string) => {
+      values.delete(key);
+    },
+  };
+  const attempt = {
+    subjectId: "s",
+    operationId: "same-op",
+  };
+  saveSubjectDeleteAttempt(storage, "w", attempt);
+  equal(readSubjectDeleteAttempt(storage, "w", "s"), attempt);
+  equal(readSubjectDeleteAttempt(storage, "other", "s"), null);
+  equal(readSubjectDeleteAttempt(storage, "w", "other"), null);
+  saveSubjectDeleteAttempt(storage, "other", attempt);
+  clearSubjectDeleteAttempt(storage, "w", "s");
+  equal(readSubjectDeleteAttempt(storage, "w", "s"), null);
+  equal(readSubjectDeleteAttempt(storage, "other", "s"), attempt);
+  values.set(subjectDeleteStorageKey("w", "s"), '{"subjectId":"other"}');
+  try {
+    readSubjectDeleteAttempt(storage, "w", "s");
+  } catch {
+    return;
+  }
+  throw new Error("Corrupt retry input allowed new deletion");
+});