diff --git a/crates/manifest/src/profile.rs b/crates/manifest/src/profile.rs
index a02e69b6f..d07d47b94 100644
--- a/crates/manifest/src/profile.rs
+++ b/crates/manifest/src/profile.rs
@@ -1751,7 +1751,7 @@ mod tests {
         assert!(feature.subjektiv.profile.enabled);
         assert!(feature.subjektiv.profile.chat.enabled);
         assert!(!feature.subjektiv.profile.consolidation_tools);
-        assert!(!feature.subjektiv.profile.extraction.enabled);
+        assert!(feature.subjektiv.profile.extraction.enabled);
         assert!(feature.subjektiv.workspace_settings.is_none());
         assert!(!feature.subjektiv.execution_enabled());
         assert!(!feature.memory.profile.enabled);
@@ -1823,6 +1823,8 @@ mod tests {
                 "SubjektivMemoryQuery",
                 "SubjektivMemoryRead",
                 "SubjektivMemoryListChanges",
+                "SubjektivMemoryRemember",
+                "SubjektivMemoryProposeChange",
                 "QueryObjective",
                 "ShowObjective",
                 "QueryTicket",
diff --git a/crates/server-api/src/authorization.rs b/crates/server-api/src/authorization.rs
index d5ac418be..6e0ca042e 100644
--- a/crates/server-api/src/authorization.rs
+++ b/crates/server-api/src/authorization.rs
@@ -55,6 +55,8 @@ use serde::{Deserialize, Serialize};
 
 mod catalog;
 pub use catalog::*;
+mod subject_defaults;
+pub use subject_defaults::*;
 
 pub const MAX_SCOPED_PERMISSIONS: usize = 256;
 
diff --git a/crates/server-api/src/authorization/subject_defaults.rs b/crates/server-api/src/authorization/subject_defaults.rs
new file mode 100644
index 000000000..e18c9f458
--- /dev/null
+++ b/crates/server-api/src/authorization/subject_defaults.rs
@@ -0,0 +1,85 @@
+//! Initial conversation authority, not a runtime fallback or a Profile capability.
+//!
+//! Hosts persist this set only while creating a new Subject. Existing Subjects opt in
+//! with the normal administrator CAS replacement: read the current source, merge only
+//! the desired entries into `execution`, preserve `delegation`, and submit that observed
+//! change ID with a stable operation ID. Never apply it on launch, restore or migration;
+//! an unset or explicitly emptied existing policy must remain denied. The Subject detail
+//! permissions editor and `GET`/`POST /api/w/{workspace}/subjektiv/subjects/{subject}/permissions`
+//! expose the same saved source and CAS. Replacing a source also invalidates previously
+//! delegated children; an administrator must deliberately review that effect before applying.
+//! No automatic opt-in or overwrite of individual exceptions is provided.
+//!
+//! `builtin:async-chat` requests the conversation composition and an explicit Subject
+//! connection selects the body. Neither action writes policy. All entries below target
+//! exactly that Subject in its storage scope; none covers Workspace, files, Workers or
+//! other Subjects. Background Worker delegation is deliberately empty. Host-owned
+//! Memory/Journal Jobs additionally require their kind/attempt/input/writer grants;
+//! these source permissions alone do not create or authorize an arbitrary Job.
+use super::{PermissionResource, ScopedPermission};
+
+pub const SUBJECT_CONVERSATION_PROFILE: &str = "builtin:async-chat";
+
+/// Basic body operations and the current-policy ceiling for standard memory Jobs.
+/// Confirmed Memory mutation remains behind consolidation; explicit remembering stages
+/// evidence, never directly edits confirmed Memory. Journal recording is a separate Job.
+pub const SUBJECT_CONVERSATION_OPERATIONS: &[&str] = &[
+    "session.record",
+    "session.list",
+    "session.search",
+    "session.read",
+    "chat.read",
+    "chat.send",
+    "memory.query",
+    "memory.read",
+    "memory.changes.list",
+    "memory.resident.read",
+    "memory.resident.supply",
+    "memory.staging.write",
+    "memory.staging.list",
+    "memory.staging.read",
+    "memory.receipt.read",
+    "memory.proposal.validate",
+    "memory.candidate.decide",
+    "memory.extract.read",
+    "memory.extract.supply",
+    "memory.extract.commit",
+    "memory.consolidation.request",
+    "memory.consolidation.supply",
+    "memory.surface.prepare",
+    "memory.surface.supply",
+    "memory.surface.publish",
+    "memory.surface.fail",
+    "journal.startup.read",
+    "journal.startup.supply",
+    "journal.compaction.read",
+    "journal.compaction.supply",
+    "journal.recording.request",
+    "journal.job.input.read",
+    "journal.job.input.supply",
+    "journal.state.read",
+    "journal.text.read",
+    "journal.operation.query",
+    "journal.operation.list",
+    "journal.operation.coverage.read",
+    "journal.entry.create",
+    "journal.entry.fix",
+    "journal.entry.rewrite",
+    "journal.position.update",
+    "journal.unchanged.confirm",
+    "journal.checkpoint",
+    "journal.finish",
+];
+
+pub fn subject_conversation_permissions(scope: &str, subject: &str) -> Vec<ScopedPermission> {
+    SUBJECT_CONVERSATION_OPERATIONS
+        .iter()
+        .map(|operation| ScopedPermission {
+            operation: (*operation).into(),
+            resource: PermissionResource::Subject {
+                workspace_id: scope.into(),
+                subject_id: subject.into(),
+            },
+        })
+        .collect()
+}
diff --git a/crates/server-api/src/lib.rs b/crates/server-api/src/lib.rs
index aa151c016..fbe0d94cb 100644
--- a/crates/server-api/src/lib.rs
+++ b/crates/server-api/src/lib.rs
@@ -5640,6 +5640,8 @@ pub struct SubjektivSubjectDeleteResponse {
 #[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq, JsonSchema)]
 #[serde(deny_unknown_fields)]
 pub struct SubjektivSubjectCreateRequest {
+    /// Stable across exact retries; changed input with the same ID conflicts.
+    pub operation_id: String,
     pub role: String,
     #[serde(default)]
     pub behavior_md: String,
@@ -11253,7 +11255,7 @@ pub fn memory_api_typescript() -> String {
     // `ts-rs` solely for this read-only projection.
     let subjektiv_browser_declarations = r#"export type SubjektivSubjectState = "active" | "retired";
 
-export type SubjektivSubjectCreateRequest = { role: string, behavior_md?: string, };
+export type SubjektivSubjectCreateRequest = { operation_id: string, role: string, behavior_md?: string, };
 
 export type SubjektivSubjectDeleteRequest = { operation_id: string, };
 
diff --git a/crates/subjektiv/src/chat/tests.rs b/crates/subjektiv/src/chat/tests.rs
index c060f2ee2..2910f6d61 100644
--- a/crates/subjektiv/src/chat/tests.rs
+++ b/crates/subjektiv/src/chat/tests.rs
@@ -640,12 +640,21 @@ fn policy(
     operation: &str,
     expected: Option<&str>,
 ) -> String {
+    // Initial test replacement observes the source installed by normal Subject creation.
+    // Keep explicit expectations unchanged so replacement races still use their pinned CAS.
+    let expected = expected.map(str::to_owned).unwrap_or_else(|| {
+        store
+            .subject_permissions(subject)
+            .unwrap()
+            .unwrap()
+            .change_id
+    });
     store
         .set_subject_permissions(
             subject,
             &server_api::authorization::SubjectPermissionsUpdate {
                 operation_id: operation.into(),
-                expected_change_id: expected.map(str::to_owned),
+                expected_change_id: Some(expected),
                 execution: Vec::new(),
                 delegation: Vec::new(),
             },
diff --git a/crates/subjektiv/src/deletion/tests.rs b/crates/subjektiv/src/deletion/tests.rs
index 8f49014e6..1662cd989 100644
--- a/crates/subjektiv/src/deletion/tests.rs
+++ b/crates/subjektiv/src/deletion/tests.rs
@@ -226,7 +226,12 @@ fn deletion_identity_conflicts_are_scope_wide_but_do_not_cross_workspaces() {
     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());
+    let fresh_source = store.subject_permissions(&fresh).unwrap().unwrap();
+    assert_eq!(
+        fresh_source.execution,
+        server_api::authorization::subject_conversation_permissions(store.scope_id(), &fresh)
+    );
+    assert!(fresh_source.delegation.is_empty());
 }
 
 #[test]
@@ -259,8 +264,14 @@ fn concurrent_begin_and_write_serialize_and_exact_finish_is_replayable() {
 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;
+    let a = store
+        .create_subject_idempotent(role(), "private behavior a".into(), "create-a")
+        .unwrap()
+        .id;
+    let b = store
+        .create_subject_idempotent(role(), "private behavior b".into(), "create-b")
+        .unwrap()
+        .id;
     store
         .stage_candidate(candidate(&a, "a", store.workspace_id()))
         .unwrap();
@@ -268,11 +279,18 @@ fn every_subject_owned_table_has_old_and_new_sql_fences_and_retention_is_scoped(
         .stage_candidate(candidate(&b, "b", store.workspace_id()))
         .unwrap();
     store.begin_subject_deletion(&a, "delete").unwrap();
-    store.database.try_with_connection::<_, SubjektivError>(|c| {
+    let creation_receipts = 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; }
+            if table == "subject_creation_receipts" {
+                // Retained non-content identity tombstones prevent duplicate recreation after erase.
+                // They have no Subject FK or content to purge, and intentionally need no deletion fence.
+                assert_eq!(columns, ["operation_id", "subject_id", "request_fingerprint"]);
+                assert!(c.prepare("PRAGMA foreign_key_list(subject_creation_receipts)")?.query([])?.next()?.is_none());
+                continue;
+            }
             assert!(DIRECT.contains(&table.as_str()) || table == "journal_erased_sessions" || table == "chat_conversations", "unclassified Subject table: {table}");
         }
         for table in DIRECT.iter().copied().chain(INDIRECT.iter().map(|v| v.0)).chain(["journal_erased_sessions"]) {
@@ -289,9 +307,22 @@ fn every_subject_owned_table_has_old_and_new_sql_fences_and_retention_is_scoped(
         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(())
+        Ok(c.prepare("SELECT operation_id,subject_id,request_fingerprint FROM subject_creation_receipts ORDER BY operation_id")?
+            .query_map([], |r| Ok((r.get::<_, String>(0)?, r.get::<_, String>(1)?, r.get::<_, String>(2)?)))?
+            .collect::<std::result::Result<Vec<_>, _>>()?)
     }).unwrap();
+    assert_eq!(creation_receipts.len(), 2);
+    assert_eq!(creation_receipts[0].1, a);
+    assert_eq!(creation_receipts[1].1, b);
     store.finish_subject_deletion(&a, "delete").unwrap();
+    let retained = store.database.try_with_connection::<_, SubjektivError>(|c| {
+        Ok(c.prepare("SELECT operation_id,subject_id,request_fingerprint FROM subject_creation_receipts ORDER BY operation_id")?
+            .query_map([], |r| Ok((r.get::<_, String>(0)?, r.get::<_, String>(1)?, r.get::<_, String>(2)?)))?
+            .collect::<std::result::Result<Vec<_>, _>>()?)
+    }).unwrap();
+    assert_eq!(retained, creation_receipts);
+    assert!(store.subject(&a).unwrap().is_none());
+    assert!(store.subject(&b).unwrap().is_some());
     assert!(store.staging_candidate(&b, "b").unwrap().is_some());
 }
 
diff --git a/crates/subjektiv/src/journal/memory_links/tests.rs b/crates/subjektiv/src/journal/memory_links/tests.rs
index 66605e943..246fd230e 100644
--- a/crates/subjektiv/src/journal/memory_links/tests.rs
+++ b/crates/subjektiv/src/journal/memory_links/tests.rs
@@ -35,9 +35,13 @@ impl Fixture {
             ))
             .unwrap();
         let store = SubjektivStore::open(&workspace, &registration).unwrap();
-        let subject = store
-            .create_subject(SubjectRole::new("companion").unwrap())
-            .unwrap();
+        let subject = if migrations.last().unwrap().version() < 12 {
+            crate::journal::tests::pre_permissions_subject_fixture(&store, "companion", "")
+        } else {
+            store
+                .create_subject(SubjectRole::new("companion").unwrap())
+                .unwrap()
+        };
         let attr =
             SubjectSessionAttribution::new(&subject.id, "runtime", "worker", "session").unwrap();
         store.record_session_attribution(attr.clone()).unwrap();
diff --git a/crates/subjektiv/src/journal/tests.rs b/crates/subjektiv/src/journal/tests.rs
index c20707123..d246552bc 100644
--- a/crates/subjektiv/src/journal/tests.rs
+++ b/crates/subjektiv/src/journal/tests.rs
@@ -429,12 +429,16 @@ mod input_delivery {
                 ))
                 .unwrap();
             let store = SubjektivStore::open(&scope, &registration).unwrap();
-            let subject = store
-                .create_subject_with_behavior(
-                    SubjectRole::new("preserved").unwrap(),
-                    "Existing behavior".into(),
-                )
-                .unwrap();
+            let subject = if baseline.last().unwrap().version() < 12 {
+                pre_permissions_subject_fixture(&store, "preserved", "Existing behavior")
+            } else {
+                store
+                    .create_subject_with_behavior(
+                        SubjectRole::new("preserved").unwrap(),
+                        "Existing behavior".into(),
+                    )
+                    .unwrap()
+            };
             drop(store);
             drop(scope);
             manager.shutdown().unwrap();
@@ -1591,6 +1595,42 @@ use sha2::{Digest, Sha256};
 use std::sync::{Arc, Barrier};
 use std::thread;
 
+pub(super) fn pre_permissions_subject_fixture(
+    store: &SubjektivStore,
+    role: &str,
+    behavior: &str,
+) -> crate::SubjectRecord {
+    // Freeze the schema 7–11 row/record shape; today's create API also writes policy tables.
+    assert!((7..=11).contains(&store.database.schema_version().unwrap()));
+    let record = serde_json::json!({
+        "schema_version": 1,
+        "id": "legacy-subject",
+        "role": role,
+        "behavior_md": behavior,
+        "state": "active",
+        "created_at": "2026-09-28T10:00:00.000Z",
+        "updated_at": "2026-09-28T10:00:00.000Z"
+    });
+    store
+        .database
+        .try_transaction::<_, crate::SubjektivError>(|tx| {
+            tx.execute(
+                "INSERT INTO subjects(subject_id,role,behavior_md,state,record_json,created_at,updated_at)
+                 VALUES(?1,?2,?3,'active',?4,?5,?5)",
+                rusqlite::params![
+                    "legacy-subject",
+                    role,
+                    behavior,
+                    record.to_string(),
+                    "2026-09-28T10:00:00.000Z",
+                ],
+            )?;
+            Ok(())
+        })
+        .unwrap();
+    serde_json::from_value(record).unwrap()
+}
+
 #[test]
 fn explicit_erasure_releases_only_after_all_body_sessions_including_unadmitted_history_are_erased()
 {
@@ -3133,16 +3173,17 @@ impl Fixture {
             SubjektivStore::register(&workspace).unwrap()
         };
         let store = SubjektivStore::open(&workspace, &registration).unwrap();
-        let subject = store
-            .create_subject_with_behavior(
-                SubjectRole::new("companion").unwrap(),
-                if upgrade {
-                    "Preserve existing Subject behavior".into()
-                } else {
-                    String::new()
-                },
+        let subject = if upgrade {
+            pre_permissions_subject_fixture(
+                &store,
+                "companion",
+                "Preserve existing Subject behavior",
             )
-            .unwrap();
+        } else {
+            store
+                .create_subject(SubjectRole::new("companion").unwrap())
+                .unwrap()
+        };
         let attribution =
             SubjectSessionAttribution::new(&subject.id, "runtime", "worker", "source-session")
                 .unwrap();
@@ -5508,12 +5549,7 @@ fn journal_migration_failure_rolls_back_ddl_and_retries_without_changing_existin
             ))
             .unwrap();
         let store = SubjektivStore::open(&scope, &registration).unwrap();
-        let subject = store
-            .create_subject_with_behavior(
-                SubjectRole::new("preserved").unwrap(),
-                "Original behavior".into(),
-            )
-            .unwrap();
+        let subject = pre_permissions_subject_fixture(&store, "preserved", "Original behavior");
         store
             .database
             .try_transaction::<_, JournalError>(|tx| {
diff --git a/crates/subjektiv/src/lib.rs b/crates/subjektiv/src/lib.rs
index 645a98a13..dd7d22ec8 100644
--- a/crates/subjektiv/src/lib.rs
+++ b/crates/subjektiv/src/lib.rs
@@ -9,6 +9,7 @@ pub mod journal;
 mod legacy_migrations;
 pub mod permissions;
 mod schema;
+mod subject_creation;
 use legacy_migrations::{
     add_candidate_decision_receipts, add_subject_behavior, add_subject_session_attribution,
     add_surface_generation_state, add_surface_job_provenance, create_schema,
@@ -54,6 +55,8 @@ pub enum SubjektivError {
     InvalidRecord(String),
     #[error("subject `{0}` was not found in this Workspace")]
     SubjectNotFound(String),
+    #[error("Subject creation request `{0}` was reused with different input")]
+    SubjectCreationConflict(String),
     #[error("Subject deletion request `{0}` conflicts with a saved deletion")]
     SubjectDeletionConflict(String),
     #[error("subject `{0}` is legacy-retired")]
@@ -658,6 +661,11 @@ static MIGRATIONS: &[FeatureMigration] = &[
         deletion::migrate,
     ),
     FeatureMigration::new(15, "add retained text-only conversations", chat::migrate),
+    FeatureMigration::new(
+        16,
+        "retain replayable Subject creation receipts",
+        subject_creation::migrate,
+    ),
 ];
 
 pub const REGISTRATION: FeatureRegistration =
@@ -754,34 +762,21 @@ impl SubjektivStore {
         role: SubjectRole,
         behavior_md: String,
     ) -> Result<SubjectRecord> {
-        validate_subject_behavior(&behavior_md)?;
-        let timestamp = now();
-        let record = SubjectRecord {
-            schema_version: SUBJEKTIV_SCHEMA_VERSION,
-            id: issued_id("subject"),
-            role,
-            behavior_md,
-            state: SubjectState::Active,
-            created_at: timestamp.clone(),
-            updated_at: timestamp,
-        };
-        let raw = serde_json::to_string(&record)?;
-        self.database.try_transaction(|transaction| {
-            transaction.execute(
-                "INSERT INTO subjects (
-                    subject_id, role, behavior_md, state, record_json, created_at, updated_at
-                 ) VALUES (?1, ?2, ?3, 'active', ?4, ?5, ?6)",
-                params![
-                    record.id,
-                    record.role.as_str(),
-                    record.behavior_md,
-                    raw,
-                    record.created_at,
-                    record.updated_at
-                ],
-            )?;
-            Ok(record)
-        })
+        self.create_subject_request(role, behavior_md, None)
+    }
+
+    /// Replays the original creation without reissuing permissions or changing the Subject.
+    /// The Host authenticates the administrator before calling. Keep the same operation ID
+    /// and full input after an unknown outcome; different input is a conflict.
+    pub fn create_subject_idempotent(
+        &self,
+        role: SubjectRole,
+        behavior_md: String,
+        operation_id: &str,
+    ) -> Result<SubjectRecord> {
+        server_api::authorization::validate_authorization_identifier(operation_id)
+            .map_err(SubjektivError::InvalidRecord)?;
+        self.create_subject_request(role, behavior_md, Some(operation_id))
     }
 
     pub fn subject(&self, subject_id: &str) -> Result<Option<SubjectRecord>> {
diff --git a/crates/subjektiv/src/permissions/tests.rs b/crates/subjektiv/src/permissions/tests.rs
index af859b04f..674b81599 100644
--- a/crates/subjektiv/src/permissions/tests.rs
+++ b/crates/subjektiv/src/permissions/tests.rs
@@ -68,16 +68,71 @@ fn open_version(
     (manager, scope, store)
 }
 
+fn legacy_unset_source_fixture(store: &SubjektivStore, subject: &str) {
+    // Model an unset legacy source without deleting immutable permission history or receipts.
+    store
+        .database
+        .try_transaction::<_, SubjektivError>(|tx| {
+            assert_eq!(
+                tx.execute(
+                    "DELETE FROM subject_permissions WHERE subject_id=?1",
+                    [subject]
+                )?,
+                1
+            );
+            Ok(())
+        })
+        .unwrap();
+    assert!(store.subject_permissions(subject).unwrap().is_none());
+}
+
+fn pre_permissions_subject_fixture(store: &SubjektivStore, behavior: &str) -> SubjectRecord {
+    // Freeze the version-11 row/record shape rather than invoking today's initializing create API.
+    assert_eq!(store.database.schema_version().unwrap(), 11);
+    let record = serde_json::json!({
+        "schema_version": 1,
+        "id": "legacy-subject",
+        "role": role().as_str(),
+        "behavior_md": behavior,
+        "state": "active",
+        "created_at": "2026-09-28T10:00:00.000Z",
+        "updated_at": "2026-09-28T10:00:00.000Z"
+    });
+    store
+        .database
+        .try_transaction::<_, SubjektivError>(|tx| {
+            tx.execute(
+                "INSERT INTO subjects(subject_id,role,behavior_md,state,record_json,created_at,updated_at)
+                 VALUES(?1,?2,?3,'active',?4,?5,?5)",
+                params![
+                    "legacy-subject",
+                    role().as_str(),
+                    behavior,
+                    record.to_string(),
+                    "2026-09-28T10:00:00.000Z",
+                ],
+            )?;
+            Ok(())
+        })
+        .unwrap();
+    serde_json::from_value(record).unwrap()
+}
+
 #[test]
 fn replacements_are_cas_fenced_replayable_and_never_restore_old_permissions() {
     let temp = tempfile::tempdir().unwrap();
     let subject;
     let first;
-    let first_update = update("allow", None, vec![permission("file.read", ".", true)]);
+    let first_update;
     {
         let (_manager, _scope, store) = open_store(temp.path(), "workspace-a");
         subject = store.create_subject(role()).unwrap().id;
-        assert!(store.subject_permissions(&subject).unwrap().is_none());
+        let initial = store.subject_permissions(&subject).unwrap().unwrap();
+        first_update = update(
+            "allow",
+            Some(&initial.change_id),
+            vec![permission("file.read", ".", true)],
+        );
         first = store
             .set_subject_permissions(&subject, &first_update)
             .unwrap();
@@ -144,8 +199,12 @@ fn failed_receipt_insert_rolls_back_source_history_and_projection() {
     let temp = tempfile::tempdir().unwrap();
     let (_manager, _scope, store) = open_store(temp.path(), "workspace-a");
     let subject = store.create_subject(role()).unwrap().id;
+    let initial = store.subject_permissions(&subject).unwrap().unwrap();
     let first = store
-        .set_subject_permissions(&subject, &update("first", None, Vec::new()))
+        .set_subject_permissions(
+            &subject,
+            &update("first", Some(&initial.change_id), Vec::new()),
+        )
         .unwrap();
     store.database.try_transaction::<_, SubjektivError>(|tx| {
         tx.execute_batch("CREATE TRIGGER fail_permission_receipt BEFORE INSERT ON subject_permission_receipts BEGIN SELECT RAISE(ABORT,'injected receipt failure'); END;")?;
@@ -164,7 +223,7 @@ fn failed_receipt_insert_rolls_back_source_history_and_projection() {
     assert_eq!(store.subject_permissions(&subject).unwrap(), Some(first));
     store.database.try_transaction::<_, SubjektivError>(|tx| {
         let counts: (u32, u32) = tx.query_row("SELECT (SELECT count(*) FROM subject_permission_changes),(SELECT count(*) FROM subject_permission_receipts)", [], |r| Ok((r.get(0)?, r.get(1)?)))?;
-        assert_eq!(counts, (1, 1));
+        assert_eq!(counts, (2, 1));
         tx.execute_batch("DROP TRIGGER fail_permission_receipt")?;
         Ok(())
     }).unwrap();
@@ -181,6 +240,7 @@ fn scope_and_validation_rejections_do_not_issue_permission_sources() {
     let (_a_manager, _a_scope, a) = open_store(&temp.path().join("a"), "workspace-a");
     let (_b_manager, _b_scope, b) = open_store(&temp.path().join("b"), "workspace-b");
     let subject = a.create_subject(role()).unwrap().id;
+    legacy_unset_source_fixture(&a, &subject);
     assert!(
         b.set_subject_permissions(&subject, &update("cross-subject", None, Vec::new()))
             .is_err()
@@ -220,10 +280,15 @@ fn child_grants_are_immutable_bounded_and_do_not_create_subject_ownership() {
     let temp = tempfile::tempdir().unwrap();
     let (_manager, _scope, store) = open_store(temp.path(), "workspace-a");
     let subject = store.create_subject(role()).unwrap().id;
+    let initial = store.subject_permissions(&subject).unwrap().unwrap();
     let source = store
         .set_subject_permissions(
             &subject,
-            &update("allow", None, vec![permission("file.read", "src", true)]),
+            &update(
+                "allow",
+                Some(&initial.change_id),
+                vec![permission("file.read", "src", true)],
+            ),
         )
         .unwrap();
     let child = grant(&subject, &source.change_id, "child");
@@ -278,10 +343,15 @@ fn redelegation_requires_current_source_and_explicit_retained_parent_ceiling() {
     let temp = tempfile::tempdir().unwrap();
     let (_manager, _scope, store) = open_store(temp.path(), "workspace-a");
     let subject = store.create_subject(role()).unwrap().id;
+    let initial = store.subject_permissions(&subject).unwrap().unwrap();
     let source = store
         .set_subject_permissions(
             &subject,
-            &update("allow", None, vec![permission("file.read", ".", true)]),
+            &update(
+                "allow",
+                Some(&initial.change_id),
+                vec![permission("file.read", ".", true)],
+            ),
         )
         .unwrap();
     let mut child = grant(&subject, &source.change_id, "child");
@@ -325,10 +395,15 @@ fn journal_state_neither_authenticates_roots_nor_bypasses_retained_child_ceiling
     let temp = tempfile::tempdir().unwrap();
     let (_manager, _scope, store) = open_store(temp.path(), "workspace-a");
     let subject = store.create_subject(role()).unwrap().id;
+    let initial = store.subject_permissions(&subject).unwrap().unwrap();
     let source = store
         .set_subject_permissions(
             &subject,
-            &update("allow", None, vec![permission("file.read", ".", true)]),
+            &update(
+                "allow",
+                Some(&initial.change_id),
+                vec![permission("file.read", ".", true)],
+            ),
         )
         .unwrap();
     // The Host has authenticated root ownership outside this store. No Journal record is
@@ -369,10 +444,15 @@ fn retained_origins_reject_cycles_foreign_subjects_and_stale_parent_sources() {
     let temp = tempfile::tempdir().unwrap();
     let (_manager, _scope, store) = open_store(temp.path(), "workspace-a");
     let subject = store.create_subject(role()).unwrap().id;
+    let initial = store.subject_permissions(&subject).unwrap().unwrap();
     let source = store
         .set_subject_permissions(
             &subject,
-            &update("allow", None, vec![permission("file.read", ".", true)]),
+            &update(
+                "allow",
+                Some(&initial.change_id),
+                vec![permission("file.read", ".", true)],
+            ),
         )
         .unwrap();
     let mut child = grant(&subject, &source.change_id, "child");
@@ -386,8 +466,16 @@ fn retained_origins_reject_cycles_foreign_subjects_and_stale_parent_sources() {
         Err(SubjektivError::AuthorizationDenied(_))
     ));
     let other = store.create_subject(role()).unwrap().id;
+    let other_initial = store.subject_permissions(&other).unwrap().unwrap();
     let other_source = store
-        .set_subject_permissions(&other, &update("other", None, source.delegation.clone()))
+        .set_subject_permissions(
+            &other,
+            &update(
+                "other",
+                Some(&other_initial.change_id),
+                source.delegation.clone(),
+            ),
+        )
         .unwrap();
     let mut foreign = grant(&other, &other_source.change_id, "foreign-child");
     foreign.origin_worker_id = "child".into();
@@ -414,10 +502,15 @@ fn failed_grant_insert_leaves_no_binding_and_can_retry_same_grant() {
     let temp = tempfile::tempdir().unwrap();
     let (_manager, _scope, store) = open_store(temp.path(), "workspace-a");
     let subject = store.create_subject(role()).unwrap().id;
+    let initial = store.subject_permissions(&subject).unwrap().unwrap();
     let source = store
         .set_subject_permissions(
             &subject,
-            &update("allow", None, vec![permission("file.read", ".", true)]),
+            &update(
+                "allow",
+                Some(&initial.change_id),
+                vec![permission("file.read", ".", true)],
+            ),
         )
         .unwrap();
     let child = grant(&subject, &source.change_id, "child");
@@ -470,9 +563,7 @@ fn current_schema_migration_preserves_subject_and_matches_new_database() {
     let original;
     {
         let (_old_manager, _old_scope, old) = open_version(&root, 11);
-        original = old
-            .create_subject_with_behavior(role(), "Keep behavior separate".into())
-            .unwrap();
+        original = pre_permissions_subject_fixture(&old, "Keep behavior separate");
     }
     let (_migrated_manager, _migrated_scope, migrated) = open_store(&root, "workspace-a");
     assert_eq!(
@@ -502,6 +593,7 @@ fn unset_or_execution_only_source_cannot_issue_child_grants_and_saved_grants_sur
     {
         let (_manager, _scope, store) = open_store(temp.path(), "workspace-a");
         let subject = store.create_subject(role()).unwrap().id;
+        legacy_unset_source_fixture(&store, &subject);
         assert!(
             store
                 .bind_worker_execution_grant(&grant(&subject, "unset", "child"))
@@ -556,14 +648,27 @@ fn subject_grant_listing_is_scoped_retained_ordered_and_fails_on_overflow() {
             .unwrap()
             .is_empty()
     );
+    let initial = store.subject_permissions(&subject).unwrap().unwrap();
     let source = store
         .set_subject_permissions(
             &subject,
-            &update("allow", None, vec![permission("file.read", ".", true)]),
+            &update(
+                "allow",
+                Some(&initial.change_id),
+                vec![permission("file.read", ".", true)],
+            ),
         )
         .unwrap();
+    let other_initial = store.subject_permissions(&other).unwrap().unwrap();
     let other_source = store
-        .set_subject_permissions(&other, &update("other", None, source.delegation.clone()))
+        .set_subject_permissions(
+            &other,
+            &update(
+                "other",
+                Some(&other_initial.change_id),
+                source.delegation.clone(),
+            ),
+        )
         .unwrap();
     let other_grant = grant(&other, &other_source.change_id, "other-child");
     store.bind_worker_execution_grant(&other_grant).unwrap();
@@ -631,7 +736,7 @@ fn failed_schema_migration_rolls_back_new_tables_and_preserves_old_data() {
     let original;
     {
         let (_old_manager, _old_scope, old) = open_version(temp.path(), 11);
-        original = old.create_subject(role()).unwrap();
+        original = pre_permissions_subject_fixture(&old, "");
         old.database
             .try_transaction::<_, SubjektivError>(|tx| {
                 tx.execute_batch("CREATE TABLE subject_permissions (collision TEXT)")?;
@@ -660,7 +765,12 @@ fn deletion_fences_source_and_child_grant_replays_and_never_falls_back_after_pur
     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 initial = store.subject_permissions(&subject).unwrap().unwrap();
+    let replacement = update(
+        "allow",
+        Some(&initial.change_id),
+        vec![permission("file.read", ".", true)],
+    );
     let source = store
         .set_subject_permissions(&subject, &replacement)
         .unwrap();
@@ -688,7 +798,12 @@ fn deletion_fences_source_and_child_grant_replays_and_never_falls_back_after_pur
             .is_none()
     );
     let fresh = store.create_subject(role()).unwrap().id;
-    assert!(store.subject_permissions(&fresh).unwrap().is_none());
+    let fresh_source = store.subject_permissions(&fresh).unwrap().unwrap();
+    assert_eq!(
+        fresh_source.execution,
+        server_api::authorization::subject_conversation_permissions("workspace-a", &fresh)
+    );
+    assert!(fresh_source.delegation.is_empty());
     assert!(
         store
             .record_session_attribution(
diff --git a/crates/subjektiv/src/subject_creation.rs b/crates/subjektiv/src/subject_creation.rs
new file mode 100644
index 000000000..38f169a7b
--- /dev/null
+++ b/crates/subjektiv/src/subject_creation.rs
@@ -0,0 +1,75 @@
+//! New Subjects receive their self-scoped conversation source in the creation transaction.
+//! This path is never called by migration, launch, restore or permission reads. Receipts
+//! retain only the issued identity and input fingerprint across erasure, preventing replay
+//! from recreating an erased Subject or restoring a revoked policy.
+use super::*;
+use server_api::authorization::{SubjectPermissions, subject_conversation_permissions};
+use sha2::{Digest, Sha256};
+
+pub(super) fn migrate(tx: &Transaction<'_>) -> feature_storage::Result<()> {
+    tx.execute_batch(
+        "CREATE TABLE subject_creation_receipts (
+            operation_id TEXT PRIMARY KEY CHECK(length(operation_id)>0),
+            subject_id TEXT NOT NULL UNIQUE,
+            request_fingerprint TEXT NOT NULL
+        );",
+    )?;
+    Ok(())
+}
+
+impl SubjektivStore {
+    pub(super) fn create_subject_request(
+        &self,
+        role: SubjectRole,
+        behavior_md: String,
+        operation_id: Option<&str>,
+    ) -> Result<SubjectRecord> {
+        validate_subject_behavior(&behavior_md)?;
+        let fingerprint: String = Sha256::digest(serde_json::to_vec(&(&role, &behavior_md))?)
+            .iter()
+            .map(|byte| format!("{byte:02x}"))
+            .collect();
+        self.database.try_transaction(|tx| {
+            if let Some(operation) = operation_id {
+                let receipt: Option<(String, String)> = tx.query_row(
+                    "SELECT subject_id,request_fingerprint FROM subject_creation_receipts WHERE operation_id=?1",
+                    [operation], |row| Ok((row.get(0)?, row.get(1)?)),
+                ).optional()?;
+                if let Some((subject, saved)) = receipt {
+                    if saved != fingerprint {
+                        return Err(SubjektivError::SubjectCreationConflict(operation.into()));
+                    }
+                    // Current identity/state, never a stale success that can recreate deleted data.
+                    return require_active_subject(tx, &subject);
+                }
+            }
+            let timestamp = now();
+            let record = SubjectRecord {
+                schema_version: SUBJEKTIV_SCHEMA_VERSION,
+                id: issued_id("subject"), role, behavior_md,
+                state: SubjectState::Active,
+                created_at: timestamp.clone(), updated_at: timestamp,
+            };
+            tx.execute(
+                "INSERT INTO subjects(subject_id,role,behavior_md,state,record_json,created_at,updated_at)
+                 VALUES(?1,?2,?3,'active',?4,?5,?6)",
+                params![record.id,record.role.as_str(),record.behavior_md,serde_json::to_string(&record)?,record.created_at,record.updated_at],
+            )?;
+            let source = SubjectPermissions {
+                change_id: issued_id("permissions"),
+                execution: subject_conversation_permissions(self.scope_id(), &record.id),
+                delegation: vec![],
+            };
+            tx.execute("INSERT INTO subject_permission_changes(subject_id,change_id,record_json) VALUES(?1,?2,?3)",
+                params![record.id,source.change_id,serde_json::to_string(&source)?])?;
+            tx.execute("INSERT INTO subject_permissions(subject_id,change_id) VALUES(?1,?2)",params![record.id,source.change_id])?;
+            if let Some(operation) = operation_id {
+                tx.execute("INSERT INTO subject_creation_receipts(operation_id,subject_id,request_fingerprint) VALUES(?1,?2,?3)",params![operation,record.id,fingerprint])?;
+            }
+            Ok(record)
+        })
+    }
+}
+
+#[cfg(test)]
+mod tests;
diff --git a/crates/subjektiv/src/subject_creation/tests.rs b/crates/subjektiv/src/subject_creation/tests.rs
new file mode 100644
index 000000000..f5ee5664e
--- /dev/null
+++ b/crates/subjektiv/src/subject_creation/tests.rs
@@ -0,0 +1,221 @@
+//! SQLite component coverage: normal store creation, persisted source/CAS and exact retries.
+//! Authentication/Runtime connections are covered by the Backend connected chat suite.
+use super::*;
+use crate::tests::{open_store, role};
+use server_api::authorization::{SubjectPermissionsUpdate, validate_managed_subject_permissions};
+
+#[test]
+fn creation_persists_self_scoped_execution_and_no_delegation() {
+    let dir = tempfile::tempdir().unwrap();
+    let (_manager, _scope, store) = open_store(dir.path(), "workspace-a");
+    let subject = store.create_subject(role()).unwrap();
+    let source = store.subject_permissions(&subject.id).unwrap().unwrap();
+    assert_eq!(
+        source.execution,
+        subject_conversation_permissions("workspace-a", &subject.id)
+    );
+    assert!(source.delegation.is_empty());
+    validate_managed_subject_permissions(
+        None,
+        &SubjectPermissionsUpdate {
+            operation_id: "validate-initial".into(),
+            expected_change_id: None,
+            execution: source.execution.clone(),
+            delegation: vec![],
+        },
+    )
+    .unwrap();
+    for permission in source.execution {
+        let mut foreign = permission.clone();
+        foreign.resource = server_api::authorization::PermissionResource::Subject {
+            workspace_id: "workspace-a".into(),
+            subject_id: "other".into(),
+        };
+        assert!(!permission.covers(&foreign));
+    }
+}
+
+#[test]
+fn creation_replay_after_reopen_never_duplicates_or_restores_revoked_source() {
+    let dir = tempfile::tempdir().unwrap();
+    let id;
+    let revoked;
+    {
+        let (_manager, _scope, store) = open_store(dir.path(), "workspace-a");
+        let first = store
+            .create_subject_idempotent(role(), "original".into(), "create")
+            .unwrap();
+        assert_eq!(
+            store
+                .create_subject_idempotent(role(), "original".into(), "create")
+                .unwrap(),
+            first
+        );
+        assert!(matches!(
+            store.create_subject_idempotent(role(), "changed".into(), "create"),
+            Err(SubjektivError::SubjectCreationConflict(_))
+        ));
+        id = first.id;
+        let source = store.subject_permissions(&id).unwrap().unwrap();
+        revoked = store
+            .set_subject_permissions(
+                &id,
+                &SubjectPermissionsUpdate {
+                    operation_id: "revoke".into(),
+                    expected_change_id: Some(source.change_id),
+                    execution: vec![],
+                    delegation: vec![],
+                },
+            )
+            .unwrap();
+    }
+    let (_manager, _scope, store) = open_store(dir.path(), "workspace-a");
+    assert_eq!(
+        store
+            .create_subject_idempotent(role(), "original".into(), "create")
+            .unwrap()
+            .id,
+        id
+    );
+    assert_eq!(store.subject_permissions(&id).unwrap(), Some(revoked));
+    assert_eq!(store.list_subjects_after(100, None).unwrap().items.len(), 1);
+}
+
+#[test]
+fn permission_write_failure_rolls_back_subject_and_creation_receipt() {
+    let dir = tempfile::tempdir().unwrap();
+    let (_manager, _scope, store) = open_store(dir.path(), "workspace-a");
+    store.database.with_connection(|c| {
+        Ok(c.execute_batch("CREATE TRIGGER fail_initial_policy BEFORE INSERT ON subject_permissions BEGIN SELECT RAISE(ABORT,'injected policy failure'); END;")?)
+    }).unwrap();
+    assert!(
+        store
+            .create_subject_idempotent(role(), String::new(), "atomic")
+            .is_err()
+    );
+    assert!(
+        store
+            .list_subjects_after(100, None)
+            .unwrap()
+            .items
+            .is_empty()
+    );
+    store
+        .database
+        .with_connection(|c| Ok(c.execute_batch("DROP TRIGGER fail_initial_policy;")?))
+        .unwrap();
+    let subject = store
+        .create_subject_idempotent(role(), String::new(), "atomic")
+        .unwrap();
+    assert!(store.subject_permissions(&subject.id).unwrap().is_some());
+}
+
+#[test]
+fn creation_replay_after_erasure_does_not_recreate_subject_or_policy() {
+    let dir = tempfile::tempdir().unwrap();
+    let (_manager, _scope, store) = open_store(dir.path(), "workspace-a");
+    let created = store
+        .create_subject_idempotent(role(), "private".into(), "create-erased")
+        .unwrap();
+    store.begin_subject_deletion(&created.id, "erase").unwrap();
+    assert!(
+        store
+            .create_subject_idempotent(role(), "private".into(), "create-erased")
+            .is_err()
+    );
+    store.finish_subject_deletion(&created.id, "erase").unwrap();
+    assert!(
+        store
+            .create_subject_idempotent(role(), "private".into(), "create-erased")
+            .is_err()
+    );
+    assert!(
+        store
+            .list_subjects_after(100, None)
+            .unwrap()
+            .items
+            .is_empty()
+    );
+}
+
+#[test]
+fn receipt_migration_preserves_existing_unset_and_revoked_policies_and_rolls_back_failure() {
+    let dir = tempfile::tempdir().unwrap();
+    let manager = feature_storage::FeatureStorage::new(dir.path());
+    let scope = manager.scope("workspace-a").unwrap();
+    let old_registration = scope
+        .register(feature_storage::FeatureRegistration::new(
+            SUBJEKTIV_FEATURE_ID,
+            &MIGRATIONS[..15],
+        ))
+        .unwrap();
+    let old = SubjektivStore::open(&scope, &old_registration).unwrap();
+    let unset = old.create_subject(role()).unwrap();
+    let revoked = old.create_subject(role()).unwrap();
+    let source = old.subject_permissions(&revoked.id).unwrap().unwrap();
+    let empty = old
+        .set_subject_permissions(
+            &revoked.id,
+            &SubjectPermissionsUpdate {
+                operation_id: "revoke-before-upgrade".into(),
+                expected_change_id: Some(source.change_id),
+                execution: vec![],
+                delegation: vec![],
+            },
+        )
+        .unwrap();
+    old.database
+        .with_connection(|c| {
+            c.execute(
+                "DELETE FROM subject_permissions WHERE subject_id=?1",
+                [&unset.id],
+            )?;
+            c.execute_batch("CREATE TABLE subject_creation_receipts(conflicting_column TEXT);")?;
+            Ok(())
+        })
+        .unwrap();
+    drop(old);
+    drop(scope);
+    drop(manager);
+    {
+        let manager = feature_storage::FeatureStorage::new(dir.path());
+        let scope = manager.scope("workspace-a").unwrap();
+        let registration = SubjektivStore::register(&scope).unwrap();
+        assert!(SubjektivStore::open(&scope, &registration).is_err());
+    }
+    let manager = feature_storage::FeatureStorage::new(dir.path());
+    let scope = manager.scope("workspace-a").unwrap();
+    let registration = scope
+        .register(feature_storage::FeatureRegistration::new(
+            SUBJEKTIV_FEATURE_ID,
+            &MIGRATIONS[..15],
+        ))
+        .unwrap();
+    let old = SubjektivStore::open(&scope, &registration).unwrap();
+    assert_eq!(old.database.schema_version().unwrap(), 15);
+    assert_eq!(old.subject(&unset.id).unwrap(), Some(unset.clone()));
+    assert_eq!(
+        old.subject_permissions(&revoked.id).unwrap(),
+        Some(empty.clone())
+    );
+    old.database
+        .with_connection(|c| {
+            c.execute_batch("DROP TABLE subject_creation_receipts;")?;
+            Ok(())
+        })
+        .unwrap();
+    drop(old);
+    drop(scope);
+    drop(manager);
+    let manager = feature_storage::FeatureStorage::new(dir.path());
+    let scope = manager.scope("workspace-a").unwrap();
+    let registration = SubjektivStore::register(&scope).unwrap();
+    let upgraded = SubjektivStore::open(&scope, &registration).unwrap();
+    assert_eq!(upgraded.subject_permissions(&unset.id).unwrap(), None);
+    assert_eq!(
+        upgraded.subject_permissions(&revoked.id).unwrap(),
+        Some(empty)
+    );
+    let fresh = upgraded.create_subject(role()).unwrap();
+    assert!(upgraded.subject_permissions(&fresh.id).unwrap().is_some());
+}
diff --git a/crates/workspace-server/src/profile_settings.rs b/crates/workspace-server/src/profile_settings.rs
index 3141de655..c515affa9 100644
--- a/crates/workspace-server/src/profile_settings.rs
+++ b/crates/workspace-server/src/profile_settings.rs
@@ -495,6 +495,11 @@ pub fn sanitize_workspace_display_name(value: &str) -> Result<String> {
 
 fn builtin_profile_summaries(default_profile: Option<&str>) -> Vec<WorkspaceProfileSummary> {
     let labels = [
+        (
+            server_api::authorization::SUBJECT_CONVERSATION_PROFILE,
+            "Subject conversation",
+            "Default Subject conversation and memory profile; requires an explicit Subject connection",
+        ),
         (
             "builtin:companion",
             "Companion",
@@ -541,7 +546,8 @@ pub fn selector_for_builtin_candidate(
     id: &str,
 ) -> Option<worker_runtime::catalog::ProfileSelector> {
     match id {
-        "builtin:companion"
+        "builtin:async-chat"
+        | "builtin:companion"
         | "builtin:intake"
         | "builtin:orchestrator"
         | "builtin:coder"
diff --git a/crates/workspace-server/src/server.rs b/crates/workspace-server/src/server.rs
index 98a32276d..c36a06b77 100644
--- a/crates/workspace-server/src/server.rs
+++ b/crates/workspace-server/src/server.rs
@@ -23856,7 +23856,7 @@ async fn scoped_create_subjektiv_subject(
             crate::subjektiv::validate_subject_behavior(&request.behavior_md)
                 .map_err(|error| Error::InvalidInput(error.to_string()))?;
             let subject = open_subjektiv_store(&api)?
-                .create_subject_with_behavior(role, request.behavior_md)
+                .create_subject_idempotent(role, request.behavior_md, &request.operation_id)
                 .map_err(subjektiv_store_error)?;
             Ok((
                 StatusCode::CREATED,
@@ -25752,6 +25752,7 @@ fn subjektiv_store_error(error: crate::subjektiv::SubjektivError) -> Error {
             Error::WorkspacePermissionDenied(error.to_string())
         }
         crate::subjektiv::SubjektivError::SubjectPermissionsConflict(_)
+        | crate::subjektiv::SubjektivError::SubjectCreationConflict(_)
         | crate::subjektiv::SubjektivError::SubjectDeletionConflict(_)
         | crate::subjektiv::SubjektivError::PermissionOperationConflict(_)
         | crate::subjektiv::SubjektivError::WorkerExecutionGrantConflict(_) => {
@@ -45318,7 +45319,10 @@ mod tests {
                 &subject_id,
                 &SubjectPermissionsUpdate {
                     operation_id: "completion-grant".into(),
-                    expected_change_id: None,
+                    expected_change_id: store
+                        .subject_permissions(&subject_id)
+                        .unwrap()
+                        .map(|p| p.change_id),
                     execution: vec![ScopedPermission {
                         operation: "merge_request.complete".into(),
                         resource: PermissionResource::MergeRequest {
@@ -47388,7 +47392,7 @@ mod tests {
             app.clone(),
             "POST",
             &format!("/api/w/{TEST_WORKSPACE_ID}/subjektiv/subjects"),
-            Some(serde_json::json!({ "role": "Browser author" })),
+            Some(serde_json::json!({ "operation_id":"browser-unauthorized", "role": "Browser author" })),
             StatusCode::UNAUTHORIZED,
         )
         .await;
@@ -47397,6 +47401,7 @@ mod tests {
             "POST",
             &format!("/api/w/{TEST_WORKSPACE_ID}/subjektiv/subjects"),
             Some(serde_json::json!({
+                "operation_id":"browser-create",
                 "role": "  Browser author  ",
                 "behavior_md": "Prefer explicit evidence.\nAsk when uncertain."
             })),
@@ -47483,7 +47488,7 @@ mod tests {
             app.clone(),
             "POST",
             &format!("/api/w/{TEST_WORKSPACE_ID}/subjektiv/subjects"),
-            Some(serde_json::json!({ "role": "   " })),
+            Some(serde_json::json!({ "operation_id":"invalid-role", "role": "   " })),
             &owner_token,
             StatusCode::BAD_REQUEST,
         )
@@ -47496,7 +47501,9 @@ mod tests {
             app.clone(),
             "POST",
             "/api/w/another-workspace/subjektiv/subjects",
-            Some(serde_json::json!({ "role": "Cross Workspace" })),
+            Some(
+                serde_json::json!({ "operation_id":"cross-workspace", "role": "Cross Workspace" }),
+            ),
             &owner_token,
             StatusCode::NOT_FOUND,
         )
@@ -47581,6 +47588,7 @@ mod tests {
                 workspace_id: TEST_WORKSPACE_ID.to_string(),
             }),
             Json(server_api::SubjektivSubjectCreateRequest {
+                operation_id: format!("create-subject-{}", uuid::Uuid::now_v7()),
                 role: "companion".to_string(),
                 behavior_md: "Prefer explicit evidence.".to_string(),
             }),
@@ -47644,6 +47652,7 @@ mod tests {
                 workspace_id: TEST_WORKSPACE_ID.to_string(),
             }),
             Json(server_api::SubjektivSubjectCreateRequest {
+                operation_id: format!("create-subject-{}", uuid::Uuid::now_v7()),
                 role: "reviewer".to_string(),
                 behavior_md: "x".repeat(server_api::SUBJEKTIV_MAX_BEHAVIOR_BYTES + 1),
             }),
@@ -48139,6 +48148,18 @@ mod tests {
                 serde_json::to_vec(&body).unwrap(),
             )
         };
+        let initial = store.subject_permissions(&subject.id).unwrap().unwrap();
+        store
+            .set_subject_permissions(
+                &subject.id,
+                &SubjectPermissionsUpdate {
+                    operation_id: "bound-authorization-revoke".into(),
+                    expected_change_id: Some(initial.change_id),
+                    execution: vec![],
+                    delegation: vec![],
+                },
+            )
+            .unwrap();
         let denied = build_router(api.clone())
             .oneshot(check(subject_request.clone()))
             .await
@@ -48158,7 +48179,10 @@ mod tests {
                 &subject.id,
                 &SubjectPermissionsUpdate {
                     operation_id: Uuid::now_v7().to_string(),
-                    expected_change_id: None,
+                    expected_change_id: store
+                        .subject_permissions(&subject.id)
+                        .unwrap()
+                        .map(|p| p.change_id),
                     execution: vec![
                         ScopedPermission {
                             operation: "memory.resident.supply".into(),
@@ -48287,7 +48311,11 @@ mod tests {
                 &subject.id,
                 &SubjectPermissionsUpdate {
                     operation_id: "staging-scope-fixture".into(),
-                    expected_change_id: None,
+                    expected_change_id: open_subjektiv_store(&api)
+                        .unwrap()
+                        .subject_permissions(&subject.id)
+                        .unwrap()
+                        .map(|p| p.change_id),
                     execution,
                     delegation: vec![],
                 },
diff --git a/crates/workspace-server/src/server/tests/chat_delegation_connected_tests.rs b/crates/workspace-server/src/server/tests/chat_delegation_connected_tests.rs
index e47a7a0f5..d2add80d7 100644
--- a/crates/workspace-server/src/server/tests/chat_delegation_connected_tests.rs
+++ b/crates/workspace-server/src/server/tests/chat_delegation_connected_tests.rs
@@ -775,7 +775,7 @@ async fn connected_chat_delegation(scenario: Scenario) {
         ];
         foreign = Some((other_subject, other_ticket));
     }
-    account_request(&h,"POST",&format!("/api/w/{TEST_WORKSPACE_ID}/subjektiv/subjects/{subject}/permissions"),Some(json!({"operation_id":"chat-policy","expected_change_id":null,"execution":execution,"delegation":delegation}))).await;
+    account_request(&h,"POST",&format!("/api/w/{TEST_WORKSPACE_ID}/subjektiv/subjects/{subject}/permissions"),Some(json!({"operation_id":"chat-policy","expected_change_id":store.subject_permissions(&subject).unwrap().unwrap().change_id,"execution":execution,"delegation":delegation}))).await;
     let original_policy = store.subject_permissions(&subject).unwrap().unwrap();
     for (name, target) in [("conversation-a", true), ("conversation-b", false)] {
         let c = account_request(
diff --git a/crates/workspace-server/src/server/tests/chat_tests.rs b/crates/workspace-server/src/server/tests/chat_tests.rs
index 971573dac..b975329dc 100644
--- a/crates/workspace-server/src/server/tests/chat_tests.rs
+++ b/crates/workspace-server/src/server/tests/chat_tests.rs
@@ -670,7 +670,10 @@ impl agen::llm_client::LlmClient for ChatModel {
                 is_error, content, ..
             } = item
             {
-                assert!(!is_error, "real connected chat Tool failed: {content:?}");
+                assert!(
+                    !is_error,
+                    "real connected chat Tool failed: {item:?}; detail={content:?}"
+                );
             }
         }
         let events = match phase {
@@ -712,11 +715,33 @@ impl agen::llm_client::LlmClient for ChatModel {
                     request.tools.iter().any(|tool| tool.name == name),
                     "builtin:async-chat must expose {name}"
                 );
-                vec![
+                let mut events = vec![
                     Event::tool_use_start(0, format!("chat-tool-{phase}"), name),
                     Event::tool_input_delta(0, input.to_string()),
                     Event::tool_use_stop(0),
-                ]
+                ];
+                if phase == 3 {
+                    for (index, name, input) in [
+                        (1, "SubjektivMemoryQuery", json!({})),
+                        (
+                            2,
+                            "SubjektivMemoryRemember",
+                            json!({"kind":"lesson","claim":"The connected chat path supports explicit remembering.","why_useful":"Retain tested conversation behavior."}),
+                        ),
+                        (3, "SubjektivSessionList", json!({})),
+                    ] {
+                        assert!(
+                            request.tools.iter().any(|tool| tool.name == name),
+                            "default profile must expose {name}"
+                        );
+                        events.extend([
+                            Event::tool_use_start(index, format!("default-memory-{index}"), name),
+                            Event::tool_input_delta(index, input.to_string()),
+                            Event::tool_use_stop(index),
+                        ]);
+                    }
+                }
+                events
             }
             4..=6 => vec![
                 Event::text_block_start(0),
@@ -743,38 +768,11 @@ struct ConnectedChat {
     owner: String,
     url: String,
     lose_next_input_ack: Arc<std::sync::atomic::AtomicBool>,
+    identity: RuntimeIdentityMaterial,
     _backend: AuthorizationCallbackServer,
     _runtime_server: ConnectedRuntimeServer,
     _dir: tempfile::TempDir,
 }
-fn publish_chat_fixture_profile(api: &WorkspaceApi) {
-    // A bundled Profile is not automatically a Backend-published candidate.
-    // Publish the actual built-in without copying or widening its capabilities.
-    let state = api
-        .config_store
-        .load_workspace_config(TEST_WORKSPACE_ID)
-        .unwrap()
-        .unwrap();
-    let main = state
-        .snapshot
-        .get(&config_source::VirtualPath::parse("main.dcdl").unwrap())
-        .unwrap();
-    let content = r#"{ profile = { default_profile = "project:connected-chat"; entries = [{ selector = "project:connected-chat"; label = "Connected chat"; description = "Real built-in async chat fixture"; profile = import "$builtin/profiles/async-chat.dcdl"; }]; }; }"#;
-    commit_workspace_config_tree(
-        api,
-        TEST_WORKSPACE_ID,
-        &ConfigCommitRequest {
-            base_digest: state.snapshot.digest.clone(),
-            entrypoints: state.contract.entrypoints.clone(),
-            changes: vec![config_source::ConfigTreeChange::Update {
-                path: main.path.clone(),
-                expected_digest: main.content_digest.clone(),
-                content: content.into(),
-            }],
-        },
-    )
-    .unwrap();
-}
 
 impl ConnectedChat {
     async fn new(
@@ -943,7 +941,6 @@ impl ConnectedChat {
             )
             .unwrap(),
         );
-        publish_chat_fixture_profile(&api);
         seed_test_delivery_binding(&api);
         let owner =
             seed_test_workspace_owner_token(api.store.as_ref(), "connected-chat-owner").await;
@@ -957,6 +954,7 @@ impl ConnectedChat {
             owner,
             url,
             lose_next_input_ack,
+            identity,
             _backend: backend,
             _runtime_server: runtime_server,
             _dir: dir,
@@ -980,6 +978,54 @@ impl ConnectedChat {
     }
 }
 
+fn connected_source_request(
+    f: &ConnectedChat,
+    worker: &str,
+    path: &str,
+    body: Vec<u8>,
+) -> Request<Body> {
+    let proof = worker_runtime::auth::RuntimeRequestSourceSigner::from_identity(&f.identity)
+        .issue(
+            &f.url,
+            TEST_WORKSPACE_ID,
+            Some(worker),
+            worker_runtime::auth::WORKSPACE_REQUEST_PERMISSION,
+            "POST",
+            path,
+            &body,
+            i64::try_from(worker_runtime::auth::unix_now_seconds()).unwrap(),
+            30,
+        )
+        .unwrap();
+    Request::builder()
+        .method("POST")
+        .uri(path)
+        .header(CONTENT_TYPE, "application/json")
+        .header(
+            worker_runtime::auth::RUNTIME_REQUEST_SOURCE_PROOF_HEADER,
+            proof,
+        )
+        .body(Body::from(body))
+        .unwrap()
+}
+
+async fn worker_chat_connected(
+    f: &ConnectedChat,
+    worker: &str,
+    operation: Value,
+) -> (StatusCode, Value) {
+    response(
+        &f.api,
+        connected_source_request(
+            f,
+            worker,
+            &chat_worker_path(),
+            serde_json::to_vec(&json!({"operation":operation})).unwrap(),
+        ),
+    )
+    .await
+}
+
 async fn next_chat_input(
     inputs: &mut tokio::sync::mpsc::Receiver<(usize, String)>,
     expected: usize,
@@ -1049,22 +1095,44 @@ async fn chat_public_receive_busy_messages_commit_before_next_model_input_and_id
     })
     .await;
     let store = open_subjektiv_store(&f.api).unwrap();
-    let subject = store
-        .create_subject(crate::subjektiv::SubjectRole::new("connected-chat").unwrap())
+    let create_wire =
+        json!({"operation_id":"connected-subject-create","role":"connected-chat","behavior_md":""});
+    let subject = f
+        .post(
+            &format!("/api/w/{TEST_WORKSPACE_ID}/subjektiv/subjects"),
+            create_wire.clone(),
+        )
+        .await["id"]
+        .as_str()
         .unwrap()
-        .id;
-    let operations = [
-        "session.record",
-        "memory.resident.read",
-        "memory.resident.supply",
-        "journal.startup.read",
-        "journal.startup.supply",
-        // Restore uses the ordinary fail-closed recording hook as well.
-        "journal.recording.request",
-        "chat.read",
-        "chat.send",
-    ];
-    f.post(&format!("/api/w/{TEST_WORKSPACE_ID}/subjektiv/subjects/{subject}/permissions"),json!({"operation_id":"connected-chat-policy","expected_change_id":null,"execution":operations.into_iter().map(|op|subject_permission(&subject,op)).collect::<Vec<_>>(),"delegation":[]})).await;
+        .to_owned();
+    assert_eq!(
+        f.post(
+            &format!("/api/w/{TEST_WORKSPACE_ID}/subjektiv/subjects"),
+            create_wire.clone()
+        )
+        .await["id"],
+        subject
+    );
+    let (status, managed) = account(
+        &f.api,
+        &f.owner,
+        "GET",
+        &format!("/api/w/{TEST_WORKSPACE_ID}/subjektiv/subjects/{subject}/permissions"),
+        None,
+    )
+    .await;
+    assert_eq!(status, StatusCode::OK, "{managed}");
+    let initial = store.subject_permissions(&subject).unwrap().unwrap();
+    assert_eq!(
+        managed["permissions"],
+        serde_json::to_value(&initial).unwrap()
+    );
+    assert_eq!(
+        initial.execution,
+        server_api::authorization::subject_conversation_permissions(TEST_WORKSPACE_ID, &subject)
+    );
+    assert!(initial.delegation.is_empty());
     let conversation = f
         .post(
             &conversations_path(),
@@ -1073,7 +1141,7 @@ async fn chat_public_receive_busy_messages_commit_before_next_model_input_and_id
         .await;
     let c = conversation["id"].as_str().unwrap();
     *conversation_id.lock().unwrap() = c.into();
-    let created = f.post(&format!("/api/w/{TEST_WORKSPACE_ID}/workers"),json!({"runtime_id":"connected-chat","display_name":"Connected async chat","profile":"project:connected-chat","initial_submit":[],"workdir_attachments":[],"feature_connections":{"subjektiv":{"subject_id":subject}}})).await;
+    let created = f.post(&format!("/api/w/{TEST_WORKSPACE_ID}/workers"),json!({"runtime_id":"connected-chat","display_name":"Connected async chat","profile":"builtin:async-chat","initial_submit":[],"workdir_attachments":[],"feature_connections":{"subjektiv":{"subject_id":subject}}})).await;
     let worker = created["worker_id"].as_str().unwrap();
     let mut events = f.runtime.subscribe_worker_observation().unwrap();
     let first_wire = json!({"operation_id":"connected-first","text":"CHAT_FIRST_USER_CONTENT"});
@@ -1170,6 +1238,19 @@ async fn chat_public_receive_busy_messages_commit_before_next_model_input_and_id
         "three user messages and two explicit Sends, not internal output"
     );
     assert!(!public.to_string().contains("INTERNAL_ASSISTANT"));
+    let staged = store.pending_staging_candidates(&subject, 20).unwrap();
+    assert!(
+        staged
+            .iter()
+            .any(|candidate| candidate.claim
+                == "The connected chat path supports explicit remembering."),
+        "Remember must reach real authorized SQLite staging, not just return a fixture receipt: {staged:?}"
+    );
+    assert_eq!(
+        store.subject_permissions(&subject).unwrap(),
+        Some(initial.clone()),
+        "composition and memory operations never reissue policy"
+    );
     let idle_wire = json!({"operation_id":"connected-idle","text":"CHAT_IDLE_USER_CONTENT"});
     let idle = f.post(&messages_path(c), idle_wire.clone()).await;
     assert_eq!(idle["delivery"]["state"], "accepted");
@@ -1272,6 +1353,88 @@ async fn chat_public_receive_busy_messages_commit_before_next_model_input_and_id
         "explicit retry after restore preserves one public User message"
     );
     assert!(!public.to_string().contains("INTERNAL_ASSISTANT"));
+    let other = f
+        .post(
+            &format!("/api/w/{TEST_WORKSPACE_ID}/subjektiv/subjects"),
+            json!({"operation_id":"foreign-default-subject","role":"foreign"}),
+        )
+        .await["id"]
+        .as_str()
+        .unwrap()
+        .to_owned();
+    for permission in [
+        subject_permission(&other, "chat.read"),
+        ScopedPermission {
+            operation: "filesystem.read".into(),
+            resource: PermissionResource::Workdir {
+                working_directory_id: "outside".into(),
+                path: ".".into(),
+                recursive: true,
+            },
+        },
+    ] {
+        let (status, body) = response(
+            &f.api,
+            connected_source_request(
+                &f,
+                worker,
+                &authorization_path(),
+                serde_json::to_vec(&permission).unwrap(),
+            ),
+        )
+        .await;
+        assert_eq!(
+            status,
+            StatusCode::FORBIDDEN,
+            "initial self source must not cover foreign resources: {body}"
+        );
+    }
+    let revoked = f.post(&format!("/api/w/{TEST_WORKSPACE_ID}/subjektiv/subjects/{subject}/permissions"), json!({"operation_id":"revoke-chat-defaults","expected_change_id":initial.change_id,"execution":[],"delegation":[]})).await;
+    assert_eq!(
+        f.post(
+            &format!("/api/w/{TEST_WORKSPACE_ID}/subjektiv/subjects"),
+            create_wire
+        )
+        .await["id"],
+        subject
+    );
+    let (status, body) = worker_chat_connected(&f, worker, read(c)).await;
+    assert_eq!(
+        status,
+        StatusCode::FORBIDDEN,
+        "revocation cannot be repaired by profile or create replay: {body}"
+    );
+    f.post(&format!("{lifecycle_path}/stop"), json!({})).await;
+    let token = f
+        .api
+        .runtime
+        .worker(&worker_ref)
+        .unwrap()
+        .restore_observation_token
+        .unwrap();
+    let restored = f
+        .post(
+            &format!("{lifecycle_path}/restore"),
+            json!({"request_id":"restore-revoked-defaults","expected_observation_token":token}),
+        )
+        .await;
+    assert_ne!(
+        restored["result"]["state"], "accepted",
+        "required startup authorization must refuse revoked source: {restored}"
+    );
+    let (status, managed) = account(
+        &f.api,
+        &f.owner,
+        "GET",
+        &format!("/api/w/{TEST_WORKSPACE_ID}/subjektiv/subjects/{subject}/permissions"),
+        None,
+    )
+    .await;
+    assert_eq!(status, StatusCode::OK);
+    assert_eq!(
+        managed["permissions"], revoked["permissions"],
+        "restore never reissues the initial policy"
+    );
 }
 
 #[derive(Clone)]
@@ -1302,21 +1465,15 @@ impl agen::llm_client::LlmClient for NotifyObservationModel {
 async fn browser_notify_preserves_ack_id_limits_retry_and_console_next_draft() {
     let (tx, mut inputs) = tokio::sync::mpsc::channel(32);
     let f = ConnectedChat::new(NotifyObservationModel(tx), |router| router).await;
-    let subject = open_subjektiv_store(&f.api)
+    let subject = f
+        .post(
+            &format!("/api/w/{TEST_WORKSPACE_ID}/subjektiv/subjects"),
+            json!({"operation_id":"notify-console-subject","role":"notify-console"}),
+        )
+        .await["id"]
+        .as_str()
         .unwrap()
-        .create_subject(crate::subjektiv::SubjectRole::new("notify-console").unwrap())
-        .unwrap()
-        .id;
-    let operations = [
-        "session.record",
-        "memory.resident.read",
-        "memory.resident.supply",
-        "journal.startup.read",
-        "journal.startup.supply",
-        "chat.read",
-        "chat.send",
-    ];
-    f.post(&format!("/api/w/{TEST_WORKSPACE_ID}/subjektiv/subjects/{subject}/permissions"),json!({"operation_id":"notify-console-policy","expected_change_id":null,"execution":operations.into_iter().map(|op|subject_permission(&subject,op)).collect::<Vec<_>>(),"delegation":[]})).await;
+        .to_owned();
     let conversation = f
         .post(
             &conversations_path(),
@@ -1324,7 +1481,7 @@ async fn browser_notify_preserves_ack_id_limits_retry_and_console_next_draft() {
         )
         .await;
     let c = conversation["id"].as_str().unwrap();
-    let created = f.post(&format!("/api/w/{TEST_WORKSPACE_ID}/workers"),json!({"runtime_id":"connected-chat","display_name":"Notify Console","profile":"project:connected-chat","initial_submit":[],"workdir_attachments":[],"feature_connections":{"subjektiv":{"subject_id":subject}}})).await;
+    let created = f.post(&format!("/api/w/{TEST_WORKSPACE_ID}/workers"),json!({"runtime_id":"connected-chat","display_name":"Notify Console","profile":"builtin:async-chat","initial_submit":[],"workdir_attachments":[],"feature_connections":{"subjektiv":{"subject_id":subject}}})).await;
     let worker = created["worker_id"].as_str().unwrap();
     let chat = f
         .post(
diff --git a/crates/workspace-server/src/server/tests/subject_authorization_tests.rs b/crates/workspace-server/src/server/tests/subject_authorization_tests.rs
index f1abbda75..d2a877f62 100644
--- a/crates/workspace-server/src/server/tests/subject_authorization_tests.rs
+++ b/crates/workspace-server/src/server/tests/subject_authorization_tests.rs
@@ -143,7 +143,14 @@ impl Fixture {
                 &subject,
                 &SubjectPermissionsUpdate {
                     operation_id: "fixture-session-setup".into(),
-                    expected_change_id: None,
+                    expected_change_id: Some(
+                        open_subjektiv_store(&api)
+                            .unwrap()
+                            .subject_permissions(&subject)
+                            .unwrap()
+                            .unwrap()
+                            .change_id,
+                    ),
                     execution: vec![subject_permission(&subject, "session.record")],
                     delegation: vec![],
                 },
@@ -3085,7 +3092,7 @@ async fn connected_read_only_subject_delegates_editing_profile_to_real_runtime_r
     // not an unset body or a registry/singleton row manufactured by the test.
     let (status, body) = response(&api, human_request(&owner, "POST",
         &format!("/api/w/{TEST_WORKSPACE_ID}/subjektiv/subjects/{subject}/permissions"),
-        Some(json!({"operation_id":"connected-authorization-policy", "expected_change_id":null,
+        Some(json!({"operation_id":"connected-authorization-policy", "expected_change_id":subject_store.subject_permissions(&subject).unwrap().unwrap().change_id,
             "execution":(["session.record", "memory.resident.read", "memory.resident.supply", "journal.startup.read", "journal.startup.supply"].into_iter().map(|operation| subject_permission(&subject, operation)).collect::<Vec<_>>()),
             "delegation":child_permissions.clone()})))).await;
     assert_eq!(status, StatusCode::OK, "{body}");
@@ -3543,7 +3550,7 @@ async fn connected_two_subjects_delegate_distinct_tickets_concurrently_on_separa
             .human(
                 reqwest::Method::POST,
                 &format!("/api/w/{TEST_WORKSPACE_ID}/subjektiv/subjects/{subject}/permissions"),
-                json!({"operation_id":format!("parallel-{label}-policy"), "expected_change_id":null,
+                json!({"operation_id":format!("parallel-{label}-policy"), "expected_change_id":subjects.subject_permissions(&subject).unwrap().unwrap().change_id,
                 "execution":execution, "delegation":permissions}),
             )
             .await;
diff --git a/crates/workspace-server/src/server/tests/subject_deletion_tests.rs b/crates/workspace-server/src/server/tests/subject_deletion_tests.rs
index 5cc349ee1..705ae64a5 100644
--- a/crates/workspace-server/src/server/tests/subject_deletion_tests.rs
+++ b/crates/workspace-server/src/server/tests/subject_deletion_tests.rs
@@ -132,7 +132,12 @@ async fn deletion_owner_scope_exact_retry_and_subject_isolation() {
         .create_subject(crate::subjektiv::SubjectRole::new("fresh").unwrap())
         .unwrap();
     assert_ne!(fresh.id, subject.id);
-    assert!(store.subject_permissions(&fresh.id).unwrap().is_none());
+    let source = store.subject_permissions(&fresh.id).unwrap().unwrap();
+    assert_eq!(
+        source.execution,
+        server_api::authorization::subject_conversation_permissions(TEST_WORKSPACE_ID, &fresh.id)
+    );
+    assert!(source.delegation.is_empty());
     assert_eq!(
         store
             .pending_staging_candidates(&fresh.id, 100)
diff --git a/crates/workspace-server/src/server/tests/subject_permission_management_tests.rs b/crates/workspace-server/src/server/tests/subject_permission_management_tests.rs
index b93b58d5c..efde68717 100644
--- a/crates/workspace-server/src/server/tests/subject_permission_management_tests.rs
+++ b/crates/workspace-server/src/server/tests/subject_permission_management_tests.rs
@@ -74,7 +74,9 @@ fn update(screen: &Value, operation: &str, execution: Value, delegation: Value)
 async fn management_read_exposes_operation_use_without_duplicate_worker_target_grants() {
     let f = ManagementFixture::new().await;
     let screen = f.read().await;
-    assert!(screen["permissions"].is_null());
+    assert!(screen["permissions"]["change_id"].is_string());
+    assert_eq!(screen["permissions"]["delegation"], json!([]));
+    f.assert_current(&screen["permissions"]);
     assert_eq!(screen["can_manage"], true);
     let operations = screen["operations"].as_array().expect("management catalog");
     let create = operations
@@ -348,7 +350,7 @@ async fn read_only_account_cannot_save_or_replay_an_owner_permission_change() {
     )
     .await;
     assert_eq!(status, StatusCode::FORBIDDEN, "{body}");
-    f.assert_current(&Value::Null);
+    f.assert_current(&initial["permissions"]);
     let saved = f.save(input.clone()).await;
     let (status, body) = response(
         &f.api,
@@ -398,8 +400,8 @@ async fn new_unknown_legacy_unavailable_and_operation_resource_mismatch_are_reje
             .await;
             assert_eq!(status, StatusCode::BAD_REQUEST, "{name}/{lane}: {body}");
             assert!(body["message"].is_string(), "{body}");
-            f.assert_current(&Value::Null);
-            assert!(f.read().await["permissions"].is_null());
+            f.assert_current(&screen["permissions"]);
+            assert_eq!(f.read().await["permissions"], screen["permissions"]);
         }
     }
 }
@@ -417,7 +419,14 @@ async fn unsupported_saved_entries_can_only_be_retained_in_the_same_lane_or_remo
             &f.subject,
             &SubjectPermissionsUpdate {
                 operation_id: "seed-pre-catalog-policy".into(),
-                expected_change_id: None,
+                expected_change_id: Some(
+                    open_subjektiv_store(&f.api)
+                        .unwrap()
+                        .subject_permissions(&f.subject)
+                        .unwrap()
+                        .unwrap()
+                        .change_id,
+                ),
                 execution: execution.clone(),
                 delegation: delegation.clone(),
             },
diff --git a/crates/workspace-server/src/server/tests/subject_spawn_tests.rs b/crates/workspace-server/src/server/tests/subject_spawn_tests.rs
index 95e7ba25f..fa00dc258 100644
--- a/crates/workspace-server/src/server/tests/subject_spawn_tests.rs
+++ b/crates/workspace-server/src/server/tests/subject_spawn_tests.rs
@@ -23,7 +23,13 @@ async fn subject_callbacks_finish_before_waiting_host_parents_release_capacity()
                 &subject.id,
                 &server_api::authorization::SubjectPermissionsUpdate {
                     operation_id: format!("subject-callback-grant-{index}"),
-                    expected_change_id: None,
+                    expected_change_id: Some(
+                        subjektiv
+                            .subject_permissions(&subject.id)
+                            .unwrap()
+                            .unwrap()
+                            .change_id,
+                    ),
                     execution: [
                         "memory.resident.read",
                         "session.record",
diff --git a/crates/workspace-server/src/server/tests/subjektiv_jobs_tests.rs b/crates/workspace-server/src/server/tests/subjektiv_jobs_tests.rs
index 92110be5e..5fd6aad22 100644
--- a/crates/workspace-server/src/server/tests/subjektiv_jobs_tests.rs
+++ b/crates/workspace-server/src/server/tests/subjektiv_jobs_tests.rs
@@ -1011,6 +1011,18 @@ async fn unset_subject_consolidation_denies_before_job_dispatch() {
         .create_subject(SubjectRole::new("unset-job-policy").unwrap())
         .unwrap();
     let source = attach_memory_job_source(&api, &subject.id).await;
+    // A legacy unset policy has no source pointer; retain the initial history fixture.
+    api.feature_storage
+        .open(&api.subjektiv_registration)
+        .unwrap()
+        .with_connection(|c| {
+            c.execute(
+                "DELETE FROM subject_permissions WHERE subject_id=?1",
+                [&subject.id],
+            )?;
+            Ok(())
+        })
+        .unwrap();
     assert!(store.subject_permissions(&subject.id).unwrap().is_none());
     stage(&store, &subject.id, "untouched");
     let error = start_subjektiv_staging_consolidation(
diff --git a/crates/workspace-server/src/server/tests/subjektiv_journal_connected_tests.rs b/crates/workspace-server/src/server/tests/subjektiv_journal_connected_tests.rs
index 4315e464c..7c2172d49 100644
--- a/crates/workspace-server/src/server/tests/subjektiv_journal_connected_tests.rs
+++ b/crates/workspace-server/src/server/tests/subjektiv_journal_connected_tests.rs
@@ -432,37 +432,10 @@ async fn backend_real_runtime_journal_release_and_next_body_persisted_startup()
     let subject = store
         .create_subject(crate::subjektiv::SubjectRole::new("connected-handoff").unwrap())
         .unwrap();
-    let owner =
-        seed_test_workspace_owner_token(api.store.as_ref(), "connected-journal-owner").await;
-    // This fixture exercises Journal continuity, not unset-policy refusal. Assign
-    // the companion's required Subject operations through authenticated administration;
-    // no filesystem, shell or delegation permission is granted to its body.
-    let update = server_api::authorization::SubjectPermissionsUpdate {
-        operation_id: "connected-journal-activation".into(),
-        expected_change_id: None,
-        execution: connected_subject_permissions(&subject.id),
-        delegation: Vec::new(),
-    };
-    let response = build_router(api.clone())
-        .oneshot(
-            axum::http::Request::builder()
-                .method("POST")
-                .uri(format!(
-                    "/api/w/{TEST_WORKSPACE_ID}/subjektiv/subjects/{}/permissions",
-                    subject.id
-                ))
-                .header("authorization", format!("Bearer {owner}"))
-                .header(CONTENT_TYPE, "application/json")
-                .body(Body::from(serde_json::to_vec(&update).unwrap()))
-                .unwrap(),
-        )
-        .await
-        .unwrap();
-    let status = response.status();
-    let body = to_bytes(response.into_body(), 2 * 1024 * 1024)
-        .await
-        .unwrap();
-    assert_eq!(status, StatusCode::OK, "{}", String::from_utf8_lossy(&body));
+    // Exercise creation-time authority through real recording and startup callbacks,
+    // without a management grant or an execution/delegation policy replacement.
+    let initial_policy = store.subject_permissions(&subject.id).unwrap().unwrap();
+    assert!(initial_policy.delegation.is_empty());
     let old = connected_create(&api, &subject.id, "connected-old-body").await;
     let old_attr = store
         .subject_session_attributions(&subject.id)
@@ -766,6 +739,11 @@ async fn backend_real_runtime_journal_release_and_next_body_persisted_startup()
             .unwrap(),
         before
     );
+    assert_eq!(
+        store.subject_permissions(&subject.id).unwrap(),
+        Some(initial_policy),
+        "recording and startup must not rewrite the initial policy"
+    );
     for (worker, session) in [
         (&old, old_attr.session_id.as_str()),
         (&next, old_attr.session_id.as_str()),
@@ -1622,7 +1600,13 @@ async fn connected_restore_fixture_with_pending_head(
         seed_test_workspace_owner_token(api.store.as_ref(), "restore-host-auth-owner").await;
     let update = server_api::authorization::SubjectPermissionsUpdate {
         operation_id: "restore-host-auth-permissions".into(),
-        expected_change_id: None,
+        expected_change_id: Some(
+            store
+                .subject_permissions(&subject.id)
+                .unwrap()
+                .unwrap()
+                .change_id,
+        ),
         execution: connected_subject_permissions(&subject.id),
         delegation: vec![],
     };
diff --git a/crates/workspace-server/src/server/tests/subjektiv_memory_journal_tests.rs b/crates/workspace-server/src/server/tests/subjektiv_memory_journal_tests.rs
index bbea4d558..8722e5286 100644
--- a/crates/workspace-server/src/server/tests/subjektiv_memory_journal_tests.rs
+++ b/crates/workspace-server/src/server/tests/subjektiv_memory_journal_tests.rs
@@ -45,7 +45,13 @@ impl Fixture {
                 subject_id,
                 &server_api::authorization::SubjectPermissionsUpdate {
                     operation_id: format!("memory-journal-fixture-grant-{subject_id}"),
-                    expected_change_id: None,
+                    expected_change_id: Some(
+                        store
+                            .subject_permissions(subject_id)
+                            .unwrap()
+                            .unwrap()
+                            .change_id,
+                    ),
                     execution: [
                         "journal.memory.links.reconcile",
                         "journal.memory.links.read",
@@ -83,6 +89,19 @@ impl Fixture {
             .unwrap();
         if granted {
             Self::grant_permissions(&store, &subject.id);
+        } else {
+            // Model an existing Subject with unset policy, retaining creation history.
+            api.feature_storage
+                .open(&api.subjektiv_registration)
+                .unwrap()
+                .with_connection(|connection| {
+                    connection.execute(
+                        "DELETE FROM subject_permissions WHERE subject_id = ?1",
+                        [&subject.id],
+                    )?;
+                    Ok(())
+                })
+                .unwrap();
         }
         let worker = Self::body_worker(&api, &subject.id);
         let source_worker = RuntimeWorkerRef::new(RUNTIME, Uuid::new_v4().to_string());
@@ -802,6 +821,8 @@ async fn memory_journal_unset_or_revoked_permissions_deny_every_route_without_li
                     },
                 )
                 .unwrap();
+        } else {
+            assert!(f.store.subject_permissions(&subject).unwrap().is_none());
         }
         let count_links = || {
             f.api
diff --git a/crates/workspace-server/src/server/tests/ticket_worker_messaging_connected_tests.rs b/crates/workspace-server/src/server/tests/ticket_worker_messaging_connected_tests.rs
index afa37bac5..4b1d61410 100644
--- a/crates/workspace-server/src/server/tests/ticket_worker_messaging_connected_tests.rs
+++ b/crates/workspace-server/src/server/tests/ticket_worker_messaging_connected_tests.rs
@@ -551,7 +551,7 @@ async fn public_two_subject_ticket_spawn_notify_edit_result_retry_and_fences() {
         ]);
         let (status, policy) = harness.human(reqwest::Method::POST,
             &format!("/api/w/{TEST_WORKSPACE_ID}/subjektiv/subjects/{subject}/permissions"),
-            json!({"operation_id":format!("public-{label}-policy"),"expected_change_id":null,"execution":execution,"delegation":delegation})).await;
+            json!({"operation_id":format!("public-{label}-policy"),"expected_change_id":subjects.subject_permissions(&subject).unwrap().unwrap().change_id,"execution":execution,"delegation":delegation})).await;
         assert_eq!(status, StatusCode::OK, "{policy}");
         let change = subjects
             .subject_permissions(&subject)
diff --git a/crates/workspace-server/src/server/tests/worker_messaging_connected_tests.rs b/crates/workspace-server/src/server/tests/worker_messaging_connected_tests.rs
index dc701fbf2..b2b6b3577 100644
--- a/crates/workspace-server/src/server/tests/worker_messaging_connected_tests.rs
+++ b/crates/workspace-server/src/server/tests/worker_messaging_connected_tests.rs
@@ -385,7 +385,7 @@ async fn connected_roundtrip(explicit_workdir: bool, repair: bool) {
         operation("worker.stop"),
         operation("worker.observe"),
     ]);
-    let (status, assigned) = response(api, human_request(&harness.owner,"POST",&format!("/api/w/{TEST_WORKSPACE_ID}/subjektiv/subjects/{subject}/permissions"),Some(json!({"operation_id":"public-messaging-policy","expected_change_id":null,"execution":execution,"delegation":permissions.lock().unwrap().clone()})))).await;
+    let (status, assigned) = response(api, human_request(&harness.owner,"POST",&format!("/api/w/{TEST_WORKSPACE_ID}/subjektiv/subjects/{subject}/permissions"),Some(json!({"operation_id":"public-messaging-policy","expected_change_id":store.subject_permissions(&subject).unwrap().unwrap().change_id,"execution":execution,"delegation":permissions.lock().unwrap().clone()})))).await;
     assert_eq!(status, StatusCode::OK, "{assigned}");
     let before = store.subject_permissions(&subject).unwrap().unwrap();
     if repair {
diff --git a/crates/workspace-server/src/server/tests/workspace_admission_tests.rs b/crates/workspace-server/src/server/tests/workspace_admission_tests.rs
index f5737f558..da2378be7 100644
--- a/crates/workspace-server/src/server/tests/workspace_admission_tests.rs
+++ b/crates/workspace-server/src/server/tests/workspace_admission_tests.rs
@@ -826,7 +826,13 @@ async fn create_and_restore_session_callbacks_finish_while_deletion_start_waits(
             &subject.id,
             &server_api::authorization::SubjectPermissionsUpdate {
                 operation_id: "session-callback-grant".into(),
-                expected_change_id: None,
+                expected_change_id: Some(
+                    subjektiv
+                        .subject_permissions(&subject.id)
+                        .unwrap()
+                        .unwrap()
+                        .change_id,
+                ),
                 execution: vec![server_api::authorization::ScopedPermission {
                     operation: "session.record".into(),
                     resource: server_api::authorization::PermissionResource::Subject {
diff --git a/crates/workspace-server/src/server_db_execution_tests.rs b/crates/workspace-server/src/server_db_execution_tests.rs
index ecf74eb06..35cc40781 100644
--- a/crates/workspace-server/src/server_db_execution_tests.rs
+++ b/crates/workspace-server/src/server_db_execution_tests.rs
@@ -178,7 +178,11 @@ impl Fixture {
         Self::request(
             "POST",
             SUBJECTS,
-            serde_json::json!({ "role": role, "behavior_md": "" }),
+            serde_json::json!({
+                "operation_id": format!("create-{role}"),
+                "role": role,
+                "behavior_md": ""
+            }),
         )
     }
 
@@ -1118,6 +1122,7 @@ async fn subjektiv_runtime_waits_leave_db_and_control_free_and_cancel_retains_th
                 workspace_id: WORKSPACE.into(),
             }),
             Json(server_api::SubjektivSubjectCreateRequest {
+                operation_id: format!("create-network-subject-{kind}"),
                 role: "network subject".into(),
                 behavior_md: String::new(),
             }),
@@ -1136,7 +1141,14 @@ async fn subjektiv_runtime_waits_leave_db_and_control_free_and_cancel_retains_th
                     &subject.id,
                     &server_api::authorization::SubjectPermissionsUpdate {
                         operation_id: format!("session-wait-grant-{kind}"),
-                        expected_change_id: None,
+                        expected_change_id: Some(
+                            open_subjektiv_store(&fixture.api)
+                                .unwrap()
+                                .subject_permissions(&subject.id)
+                                .unwrap()
+                                .unwrap()
+                                .change_id,
+                        ),
                         execution: vec![server_api::authorization::ScopedPermission {
                             operation: operation.into(),
                             resource: server_api::authorization::PermissionResource::Subject {
diff --git a/openapi/server-api.json b/openapi/server-api.json
index f1139939d..1cb14c69c 100644
--- a/openapi/server-api.json
+++ b/openapi/server-api.json
@@ -15451,11 +15451,16 @@
             "default": "",
             "type": "string"
           },
+          "operation_id": {
+            "description": "Stable across exact retries; changed input with the same ID conflicts.",
+            "type": "string"
+          },
           "role": {
             "type": "string"
           }
         },
         "required": [
+          "operation_id",
           "role"
         ],
         "type": "object"
@@ -22720,7 +22725,7 @@
   "info": {
     "title": "Yoi Server API",
     "version": "0.1.0",
-    "x-yoi-source-digest": "sha256:2ac605f7ea70d0c725f9993a5c59c4a8c4266cf69184902db7b3ea7fd5932224"
+    "x-yoi-source-digest": "sha256:85593527d939626a32b88d9b2760b531681b087d95fefa5119901fe86d60d76c"
   },
   "openapi": "3.1.0",
   "paths": {
diff --git a/resources/profiles/async-chat.dcdl b/resources/profiles/async-chat.dcdl
index 26dfc4966..db943e4ad 100644
--- a/resources/profiles/async-chat.dcdl
+++ b/resources/profiles/async-chat.dcdl
@@ -14,7 +14,7 @@
             enabled = true;
             chat = { enabled = true; };
             consolidation_tools = false;
-            extraction = { enabled = false; };
+            extraction = { enabled = true; threshold = 50000; };
         };
         web = { enabled = false; };
         image = { enabled = false; };
@@ -54,6 +54,8 @@
             { tool = "SubjektivMemoryQuery"; pattern = "*"; action = "allow"; },
             { tool = "SubjektivMemoryRead"; pattern = "*"; action = "allow"; },
             { tool = "SubjektivMemoryListChanges"; pattern = "*"; action = "allow"; },
+            { tool = "SubjektivMemoryRemember"; pattern = "*"; action = "allow"; },
+            { tool = "SubjektivMemoryProposeChange"; pattern = "*"; action = "allow"; },
             { tool = "QueryObjective"; pattern = "*"; action = "allow"; },
             { tool = "ShowObjective"; pattern = "*"; action = "allow"; },
             { tool = "QueryTicket"; pattern = "*"; action = "allow"; },
diff --git a/tools/web-ux/browser-tests/memory_document_fixture_server.ts b/tools/web-ux/browser-tests/memory_document_fixture_server.ts
index 7bf6b63ab..85456e973 100644
--- a/tools/web-ux/browser-tests/memory_document_fixture_server.ts
+++ b/tools/web-ux/browser-tests/memory_document_fixture_server.ts
@@ -43,6 +43,12 @@ const memoryPageCursor = "fixture-memory-page-2";
 const changePageCursor = "fixture-change-page-2";
 const createdSubjectIds = new Set<string>();
 const subjectCreateRequests: unknown[] = [];
+type SubjectCreateInput = { operation_id: string; role: string; behavior_md: string };
+const subjectCreateReceipts = new Map<
+  string,
+  { request: SubjectCreateInput; subject: ReturnType<typeof subject> }
+>();
+const subjectCreateOutcomes: { outcome: string; subject_id?: string }[] = [];
 let createdSubjectCount = 0;
 
 const paragraphs = Array.from(
@@ -390,6 +396,21 @@ async function staticResponse(pathname: string): Promise<Response> {
 Deno.serve({ hostname: "127.0.0.1", port }, async (request) => {
   const url = new URL(request.url);
   if (url.pathname === "/health") return new Response("ok");
+  // 合成HTTPの閲覧主体。実Backendの認証や権限付与の証拠にはしない。
+  if (url.pathname === "/api/auth/whoami") {
+    return json({
+      authentication_reference: "memory-review-fixture-authentication",
+      session: { kind: "authenticated", expires_at: "2099-01-01T00:00:00Z" },
+      actor: {
+        user_id: "fixture-user",
+        account_id: "owner",
+        handle: "fixture",
+        display_name: "Synthetic Memory owner",
+        auth_method: "browser_session",
+      },
+    });
+  }
+  if (url.pathname === "/api/hosting/access") return json({ is_admin: false });
   if (permissionsMode) {
     const response = await permissionsFixture(request);
     if (response) return response;
@@ -397,6 +418,14 @@ Deno.serve({ hostname: "127.0.0.1", port }, async (request) => {
   if (url.pathname === "/fixture/subject-create-requests") {
     return json({ count: subjectCreateRequests.length, requests: subjectCreateRequests });
   }
+  if (url.pathname === "/fixture/subject-create-evidence") {
+    return json({
+      authority: "synthetic-http-NOT-real-Backend",
+      requests: subjectCreateRequests,
+      outcomes: subjectCreateOutcomes,
+      created: subjects.filter((item) => createdSubjectIds.has(item.id)),
+    });
+  }
   if (url.pathname === "/api/workspaces") {
     return json([{
       workspace_id: workspaceId,
@@ -488,22 +517,47 @@ Deno.serve({ hostname: "127.0.0.1", port }, async (request) => {
   if (url.pathname === subjectsPath) {
     if (request.method === "POST") {
       const payload = await request.json().catch(() => null) as {
+        operation_id?: unknown;
         role?: unknown;
         behavior_md?: unknown;
       } | null;
       subjectCreateRequests.push(payload);
-      if (!payload || typeof payload.role !== "string" || payload.role.trim().length === 0) {
-        return json({ error: "Bad Request", message: "subject role must not be empty" }, 400);
+      const reject = (message: string, status = 400) => {
+        subjectCreateOutcomes.push({ outcome: `rejected-${status}` });
+        return json({ error: status === 409 ? "Conflict" : "Bad Request", message }, status);
+      };
+      if (
+        !payload || typeof payload.operation_id !== "string" ||
+        payload.operation_id.trim().length === 0
+      ) return reject("subject create operation_id is required");
+      if (typeof payload.role !== "string" || payload.role.trim().length === 0) {
+        return reject("subject role must not be empty");
       }
       if (payload.role === "Permission denied") {
+        subjectCreateOutcomes.push({ outcome: "rejected-403" });
         return json({ error: "Forbidden", message: "workspace permission denied" }, 403);
       }
       if (typeof payload.behavior_md !== "string") {
-        return json({ error: "Bad Request", message: "subject behavior must be a string" }, 400);
+        return reject("subject behavior must be a string");
+      }
+      const input: SubjectCreateInput = {
+        operation_id: payload.operation_id,
+        role: payload.role,
+        behavior_md: payload.behavior_md,
+      };
+      const receipt = subjectCreateReceipts.get(input.operation_id);
+      if (receipt) {
+        if (
+          receipt.request.role !== input.role || receipt.request.behavior_md !== input.behavior_md
+        ) return reject("operation_id already used with different input", 409);
+        subjectCreateOutcomes.push({ outcome: "replay", subject_id: receipt.subject.id });
+        return json(receipt.subject, 201);
       }
       createdSubjectCount += 1;
       const id = `created-subject-${String(createdSubjectCount).padStart(4, "0")}`;
-      const created = subject(id, payload.role, "active", "fingerprint-empty", payload.behavior_md);
+      const created = subject(id, input.role, "active", "fingerprint-empty", input.behavior_md);
+      subjectCreateReceipts.set(input.operation_id, { request: input, subject: created });
+      subjectCreateOutcomes.push({ outcome: "created", subject_id: id });
       createdSubjectIds.add(id);
       subjects.unshift(created);
       return json(created, 201);
diff --git a/tools/web-ux/browser-tests/memory_document_shell_test.ts b/tools/web-ux/browser-tests/memory_document_shell_test.ts
index c5ac54311..79535ed31 100644
--- a/tools/web-ux/browser-tests/memory_document_shell_test.ts
+++ b/tools/web-ux/browser-tests/memory_document_shell_test.ts
@@ -482,11 +482,25 @@ Deno.test("production subject Memory and Worker launch shells preserve exact sco
       ]);
       const createEvidence = await (await fetch(`${baseUrl}/fixture/subject-create-requests`))
         .json();
+      const operationIds = createEvidence.requests.map((request: { operation_id: string }) =>
+        request.operation_id
+      );
+      for (const operationId of operationIds) {
+        assert(
+          typeof operationId === "string" &&
+            /^[0-9a-f]{8}-[0-9a-f]{4}-4[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i.test(
+              operationId,
+            ),
+          "Each new creation attempt must carry a UUID operation_id",
+        );
+      }
+      assert(operationIds[0] !== operationIds[1], "A resolved rejection must allow a new attempt");
       assertEquals(createEvidence, {
         count: 2,
         requests: [
-          { role: "Permission denied", behavior_md: "" },
+          { operation_id: operationIds[0], role: "Permission denied", behavior_md: "" },
           {
+            operation_id: operationIds[1],
             role: "  Release steward  ",
             behavior_md: "Challenge unsupported assumptions before release.",
           },
diff --git a/tools/web-ux/browser-tests/subject_creation_review.ts b/tools/web-ux/browser-tests/subject_creation_review.ts
new file mode 100644
index 000000000..ed1b26334
--- /dev/null
+++ b/tools/web-ux/browser-tests/subject_creation_review.ts
@@ -0,0 +1,444 @@
+#!/usr/bin/env -S deno run -A
+/** 実Webの作成・再送を合成HTTP境界で検証する。実Backendの保存・認可は証明しない。 */
+import { assert, assertEquals } from "@std/assert";
+import { dirname, fromFileUrl, join, relative, resolve } from "@std/path";
+import { chromium, type Page } from "playwright";
+import { sha256File } from "../src/artifacts.ts";
+import { startOwnedProcesses, stopOwnedProcesses } from "../src/processes.ts";
+import { assertNoPageWideOverflow, freePort } from "./memory_document_harness.ts";
+
+const root = resolve(dirname(fromFileUrl(import.meta.url)), "../../..");
+const [buildArg, runId, modeArg] = Deno.args;
+const mode = modeArg ?? (runId?.startsWith("before") ? "before" : "after");
+if (
+  !buildArg || !runId || !/^[a-zA-Z0-9._-]+$/.test(runId) || !["before", "after"].includes(mode)
+) {
+  throw new Error(
+    "usage: subject_creation_review.ts <actual-build-path> <unique-run-id> [before|after]",
+  );
+}
+const buildRoot = resolve(buildArg);
+for (const name of ["index.html", "_app/immutable"]) {
+  await Deno.stat(join(buildRoot, name)).catch(() => {
+    throw new Error(`Actual Web build missing: ${join(buildRoot, name)}; parent must supply it.`);
+  });
+}
+const output = join(root, "target/web-ux/t806", runId);
+await Deno.mkdir(dirname(output), { recursive: true });
+await Deno.mkdir(output); // 既存runの画像や判断を上書きしない。
+
+async function git(args: string[]) {
+  const result = await new Deno.Command("git", { args, cwd: root, stdout: "piped" }).output();
+  return result.success ? new TextDecoder().decode(result.stdout).trim() : null;
+}
+async function inventory(path: string): Promise<{ path: string; sha256: string }[]> {
+  const files: { path: string; sha256: string }[] = [];
+  for await (const entry of Deno.readDir(path)) {
+    const child = join(path, entry.name);
+    if (entry.isDirectory) files.push(...await inventory(child));
+    else if (entry.isFile) {
+      files.push({ path: relative(buildRoot, child), sha256: await sha256File(child) });
+    }
+  }
+  return files.sort((a, b) => a.path.localeCompare(b.path));
+}
+const buildFiles = await inventory(buildRoot);
+const sourceStatus = await git(["status", "--porcelain"]);
+const manifest = {
+  evidence: "actual-Web-with-synthetic-HTTP-NOT-real-Backend",
+  mode,
+  buildRoot,
+  buildFiles,
+  source: {
+    commitSha: await git(["rev-parse", "HEAD"]),
+    dirty: sourceStatus === null ? null : sourceStatus.length > 0,
+    status: sourceStatus,
+    captureSources: await Promise.all([
+      "tools/web-ux/browser-tests/subject_creation_review.ts",
+      "tools/web-ux/browser-tests/memory_document_fixture_server.ts",
+      "tools/web-ux/browser-tests/memory_document_harness.ts",
+    ].map(async (path) => ({ path, sha256: await sha256File(join(root, path)) }))),
+    buildProvenance:
+      "parent-supplied build; checkout metadata is capture-time, not a build attestation",
+  },
+  visualVerdict: "UNREVIEWED — parent must ViewImage and inspect review-context.json",
+  status: "running",
+  browser: { name: "chromium", version: "" },
+  expectedFaults: [
+    "Per width/theme: first POST reply aborted only after synthetic persistence (HTTP 201)",
+    ...(mode === "after"
+      ? ["Per width/theme: second POST intentionally returns HTTP 403 before fixture"]
+      : []),
+  ],
+  baselineLimit: mode === "before"
+    ? "Capture only. Missing operation_id is added ONLY to fixture transport for synthetic persistence; original browser body is recorded. No replay or disabled-input success asserted."
+    : null,
+  captures: [] as unknown[],
+  scenarios: [] as unknown[],
+  failures: [] as string[],
+};
+async function saveManifest() {
+  await Deno.writeTextFile(join(output, "review-context.json"), JSON.stringify(manifest, null, 2));
+}
+type Fault = {
+  kind: string;
+  message: string;
+  url?: string;
+  method?: string;
+  expected: boolean;
+};
+function observe(page: Page, createUrl: string) {
+  const faults: Fault[] = [];
+  let documentStatus: number | null = null;
+  let allowAbort = false;
+  let allow403 = false;
+  page.on(
+    "pageerror",
+    (e) => faults.push({ kind: "pageerror", message: e.stack ?? e.message, expected: false }),
+  );
+  page.on("console", (e) => {
+    if (!["warning", "error"].includes(e.type())) return;
+    const url = e.location().url;
+    // 意図した同一endpointのネットワーク診断だけを許容し、pageerrorは常に失敗にする。
+    const expected = url === createUrl && (
+      (allowAbort && /Failed to load resource: net::ERR_FAILED/.test(e.text())) ||
+      (allow403 && /Failed to load resource:.*403/.test(e.text()))
+    );
+    faults.push({ kind: `console-${e.type()}`, message: e.text(), url, expected });
+  });
+  page.on("requestfailed", (r) =>
+    faults.push({
+      kind: "requestfailed",
+      message: r.failure()?.errorText ?? "request failed",
+      url: r.url(),
+      method: r.method(),
+      expected: allowAbort && r.url() === createUrl && r.method() === "POST" &&
+        r.failure()?.errorText === "net::ERR_FAILED",
+    }));
+  page.on("response", (r) => {
+    if (r.request().isNavigationRequest()) documentStatus = r.status();
+    if (r.status() >= 400) {
+      faults.push({
+        kind: "http",
+        message: `HTTP ${r.status()}`,
+        url: r.url(),
+        method: r.request().method(),
+        expected: allow403 && r.url() === createUrl && r.request().method() === "POST" &&
+          r.status() === 403,
+      });
+    }
+  });
+  return {
+    faults,
+    documentStatus: () => documentStatus,
+    expectAbort: () => {
+      allowAbort = true;
+    },
+    expect403: () => {
+      allow403 = true;
+    },
+  };
+}
+async function controls(page: Page) {
+  const role = page.getByRole("textbox", { name: "Role", exact: true });
+  const behavior = page.getByRole("textbox", { name: /Behavior/ });
+  if (!await role.count()) return null;
+  return {
+    role: await role.inputValue(),
+    behavior: await behavior.inputValue(),
+    roleDisabled: await role.isDisabled(),
+    behaviorDisabled: await behavior.isDisabled(),
+    submitting: await page.locator("#subject-create-panel").getAttribute("aria-busy"),
+  };
+}
+async function capture(page: Page, observation: ReturnType<typeof observe>, id: string) {
+  const image = join(output, `${id}.png`);
+  const snapshot = join(output, `${id}.aria.txt`);
+  await page.screenshot({ path: image });
+  await Deno.writeTextFile(snapshot, await page.locator("body").ariaSnapshot());
+  manifest.captures.push({
+    id,
+    route: new URL(page.url()).pathname,
+    viewport: page.viewportSize(),
+    theme: await page.evaluate(() =>
+      (globalThis as any).matchMedia("(prefers-color-scheme: dark)").matches ? "dark" : "light"
+    ),
+    documentStatus: observation.documentStatus(),
+    visibleAlerts: await page.getByRole("alert").allTextContents(),
+    controls: await controls(page),
+    focus: await page.locator(":focus").evaluateAll((elements) =>
+      elements.map((e) => ({ tag: e.tagName, text: e.textContent, id: e.id }))
+    ),
+    mainBounds: await page.locator("main").evaluate((e) => ({
+      width: e.clientWidth,
+      scrollTop: e.scrollTop,
+    })),
+    image,
+    imageSha256: await sha256File(image),
+    accessibilitySnapshot: snapshot,
+    accessibilitySha256: await sha256File(snapshot),
+    faults: [...observation.faults],
+    unexpectedFaults: observation.faults.filter((f) => !f.expected),
+    reviewed: false,
+  });
+  await saveManifest();
+  await assertNoPageWideOverflow(page);
+  assertEquals(observation.documentStatus(), 200, `${id}: document must render successfully`);
+}
+const roleText = "  Release steward — evidence and uncertainty  ";
+const behaviorText =
+  "Challenge unsupported assumptions before release.\nAsk before irreversible actions; preserve the exact pending request.\nEvidence: https://example.com/review/subject-creation";
+const uuid = /^[0-9a-f]{8}-[0-9a-f]{4}-4[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i;
+async function assertPending(page: Page) {
+  assertEquals(await controls(page), {
+    role: roleText,
+    behavior: behaviorText,
+    roleDisabled: true,
+    behaviorDisabled: true,
+    submitting: "false",
+  });
+  assert(await page.getByRole("button", { name: "Create Subject", exact: true }).isEnabled());
+}
+async function reopen(page: Page) {
+  await page.getByRole("button", { name: "Cancel", exact: true }).click();
+  await page.locator("#subject-create-panel").waitFor({ state: "detached" });
+  assert(
+    await page.getByRole("button", { name: "New Subject", exact: true }).evaluate((e) =>
+      e === e.ownerDocument.activeElement
+    ),
+  );
+  await page.getByRole("button", { name: "New Subject", exact: true }).click();
+  await page.locator('#subject-create-panel[aria-busy="false"]').waitFor();
+}
+const browser = await chromium.launch({ headless: true });
+manifest.browser.version = browser.version();
+try {
+  for (const theme of ["light", "dark"] as const) {
+    for (const width of [1440, 768, 390]) {
+      const prefix = `${theme}-${width}`;
+      const port = await freePort();
+      const base = `http://127.0.0.1:${port}`;
+      const createUrl = `${base}/api/w/memory-review/subjektiv/subjects`;
+      const owned = await startOwnedProcesses(
+        [{
+          id: `subject-create-${prefix}`,
+          command: Deno.execPath(),
+          cwd: join(root, "tools/web-ux"),
+          args: [
+            "run",
+            "-A",
+            join(root, "tools/web-ux/browser-tests/memory_document_fixture_server.ts"),
+            String(port),
+            buildRoot,
+            "3",
+          ],
+          readyUrl: `${base}/health`,
+        }],
+        join(output, "scenario.json"),
+        join(output, `logs-${prefix}`),
+        [],
+      );
+      const context = await browser.newContext({
+        viewport: { width, height: width === 390 ? 844 : 900 },
+        colorScheme: theme,
+        reducedMotion: "reduce",
+      });
+      const page = await context.newPage();
+      page.setDefaultTimeout(15_000);
+      const observation = observe(page, createUrl);
+      const requests: unknown[] = [];
+      const transportOverrides: unknown[] = [];
+      const scenario = {
+        prefix,
+        requests,
+        transportOverrides,
+        syntheticEvidence: null as unknown,
+        faults: observation.faults,
+      };
+      manifest.scenarios.push(scenario);
+      try {
+        await page.goto(`${base}/w/memory-review/memory`);
+        await page.getByRole("heading", { name: "Subjects", level: 1, exact: true }).waitFor();
+        await page.getByRole("button", { name: "New Subject", exact: true }).click();
+        const role = page.getByRole("textbox", { name: "Role", exact: true });
+        const behavior = page.getByRole("textbox", { name: /Behavior/ });
+        await role.fill(roleText);
+        await behavior.fill(behaviorText);
+        await role.focus();
+        await capture(page, observation, `${prefix}-normal-form`);
+        await page.keyboard.press("Tab");
+        assert(await behavior.evaluate((e) => e === e.ownerDocument.activeElement));
+        await page.keyboard.press("Tab");
+        assert(
+          await page.getByRole("button", { name: "Create Subject", exact: true }).evaluate((e) =>
+            e === e.ownerDocument.activeElement
+          ),
+        );
+        await capture(page, observation, `${prefix}-normal-actions-keyboard`);
+
+        let attempt = 0;
+        await page.route(createUrl, async (route) => {
+          if (route.request().method() !== "POST") return await route.continue();
+          attempt += 1;
+          const body = route.request().postDataJSON();
+          requests.push(body);
+          if (attempt === 1) {
+            observation.expectAbort();
+            // 旧buildの比較撮影だけ、fixtureへ送るコピーにoperation_idを足す。
+            // 実browser要求はrequestsに未変更で保存し、旧UIの契約成功とは扱わない。
+            const bridged = mode === "before" && !body.operation_id;
+            const transport = bridged ? { ...body, operation_id: crypto.randomUUID() } : body;
+            if (bridged) {
+              transportOverrides.push({
+                attempt,
+                reason: "baseline-only fixture bridge",
+                body: transport,
+              });
+            }
+            const persisted = await route.fetch({ postData: JSON.stringify(transport) });
+            assertEquals(
+              persisted.status(),
+              201,
+              "Fault must follow synthetic persistence, not validation rejection",
+            );
+            await persisted.dispose();
+            await route.abort("failed");
+          } else if (attempt === 2 && mode === "after") {
+            observation.expect403();
+            await route.fulfill({
+              status: 403,
+              contentType: "application/json",
+              body: JSON.stringify({
+                error: "Forbidden",
+                message: "synthetic later permission rejection",
+              }),
+            });
+          } else await route.continue();
+        });
+        await page.getByRole("button", { name: "Create Subject", exact: true }).click();
+        await page.getByRole("alert").filter({ hasText: /unknown|may have been created/i })
+          .waitFor();
+        await page.locator('#subject-create-panel[aria-busy="false"]').waitFor();
+        await page.getByRole("alert").scrollIntoViewIfNeeded();
+        await capture(page, observation, `${prefix}-unknown-after-persisted-response-loss`);
+        await role.scrollIntoViewIfNeeded();
+        await capture(page, observation, `${prefix}-unknown-fields`);
+        if (mode === "after") {
+          await assertPending(page);
+          const first = requests[0] as { operation_id: string; role: string; behavior_md: string };
+          assert(uuid.test(first.operation_id), "UI must generate a UUID per creation attempt");
+          assertEquals(first, {
+            operation_id: first.operation_id,
+            role: roleText,
+            behavior_md: behaviorText,
+          });
+          await reopen(page);
+          await assertPending(page);
+          await page.getByRole("alert").scrollIntoViewIfNeeded();
+          await capture(page, observation, `${prefix}-cancel-reopen-pending`);
+          await page.getByRole("button", { name: "Create Subject", exact: true }).click();
+          await page.getByRole("alert").filter({ hasText: /do not have permission/ }).waitFor();
+          await page.locator('#subject-create-panel[aria-busy="false"]').waitFor();
+          assertEquals(
+            requests[1],
+            first,
+            "Retry after cancel/reopen must retain the complete request",
+          );
+          await assertPending(page);
+          await page.getByRole("alert").scrollIntoViewIfNeeded();
+          await capture(page, observation, `${prefix}-later-403-still-pending`);
+          await role.scrollIntoViewIfNeeded();
+          await capture(page, observation, `${prefix}-later-403-disabled-fields`);
+          await reopen(page);
+          await assertPending(page);
+          await page.getByRole("alert").scrollIntoViewIfNeeded();
+          await capture(page, observation, `${prefix}-later-403-reopened-pending`);
+          await page.getByRole("button", { name: "Create Subject", exact: true }).click();
+          await page.waitForURL("**/memory/created-subject-0001");
+          await page.getByRole("heading", { name: roleText.trim(), level: 1, exact: true })
+            .waitFor();
+          assertEquals(
+            requests,
+            [first, first, first],
+            "All retries must use the same operation and full input",
+          );
+          const article = page.getByRole("article", { name: "User-managed Subject behavior" });
+          await article.waitFor();
+          assert((await article.textContent())?.includes("preserve the exact pending request."));
+          await page.getByText("No committed Memories yet.").waitFor();
+          await capture(page, observation, `${prefix}-recovered-actual-detail`);
+        }
+        scenario.syntheticEvidence = await (await fetch(`${base}/fixture/subject-create-evidence`))
+          .json();
+        const evidence = scenario.syntheticEvidence as {
+          created: { id: string; role: string; behavior_md: string }[];
+          requests: unknown[];
+          outcomes: unknown[];
+        };
+        assertEquals(evidence.created.length, 1, "Only one synthetic Subject may be created");
+        assertEquals(evidence.created[0].role, roleText);
+        assertEquals(evidence.created[0].behavior_md, behaviorText);
+        if (mode === "after") {
+          assertEquals(evidence.requests, [requests[0], requests[0]]);
+          assertEquals(evidence.outcomes, [
+            { outcome: "created", subject_id: "created-subject-0001" },
+            { outcome: "replay", subject_id: "created-subject-0001" },
+          ]);
+          assertEquals(observation.faults.filter((f) => f.kind === "http" && f.expected).length, 1);
+        }
+        assertEquals(
+          observation.faults.filter((f) => f.kind === "requestfailed" && f.expected).length,
+          1,
+        );
+        assertEquals(
+          observation.faults.filter((f) => !f.expected),
+          [],
+          `${prefix}: unexpected browser faults`,
+        );
+        await Deno.writeTextFile(
+          join(output, `${prefix}-synthetic-http-evidence.json`),
+          JSON.stringify(scenario, null, 2),
+        );
+      } catch (e) {
+        manifest.failures.push(
+          `${prefix}: ${e instanceof Error ? e.stack ?? e.message : String(e)}`,
+        );
+        await capture(page, observation, `${prefix}-failure`).catch((captureError) =>
+          manifest.failures.push(`Failure capture: ${captureError}`)
+        );
+        throw e;
+      } finally {
+        try {
+          scenario.syntheticEvidence = await fetch(`${base}/fixture/subject-create-evidence`)
+            .then((response) => response.json()).catch(() => scenario.syntheticEvidence);
+          await Deno.writeTextFile(
+            join(output, `${prefix}-synthetic-http-evidence.json`),
+            JSON.stringify(scenario, null, 2),
+          );
+        } finally {
+          try {
+            await context.close();
+          } finally {
+            await stopOwnedProcesses(owned);
+            await saveManifest();
+          }
+        }
+      }
+    }
+  }
+  assertEquals(
+    await inventory(buildRoot),
+    buildFiles,
+    "Parent build changed during the capture matrix",
+  );
+  manifest.status = mode === "before"
+    ? "baseline-capture-only-visual-unreviewed"
+    : "browser-assertions-passed-visual-unreviewed";
+} catch (e) {
+  manifest.status = "failed";
+  throw e;
+} finally {
+  await browser.close();
+  await saveManifest();
+  console.log(join(output, "review-context.json"));
+}
diff --git a/web/workspace/src/lib/generated/companion-api.ts b/web/workspace/src/lib/generated/companion-api.ts
index ff89b5de4..766492c8d 100644
--- a/web/workspace/src/lib/generated/companion-api.ts
+++ b/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 (sha256:2ac605f7ea70d0c725f9993a5c59c4a8c4266cf69184902db7b3ea7fd5932224)
+// Input contract: 0.1.0 (sha256:85593527d939626a32b88d9b2760b531681b087d95fefa5119901fe86d60d76c)
 // 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
diff --git a/web/workspace/src/lib/generated/memory-api.ts b/web/workspace/src/lib/generated/memory-api.ts
index b1bbc3881..3daa53463 100644
--- a/web/workspace/src/lib/generated/memory-api.ts
+++ b/web/workspace/src/lib/generated/memory-api.ts
@@ -68,7 +68,7 @@ export type SubjectPermissionInterruption = { runtime_id: string, worker_id: str
 
 export type SubjektivSubjectState = "active" | "retired";
 
-export type SubjektivSubjectCreateRequest = { role: string, behavior_md?: string, };
+export type SubjektivSubjectCreateRequest = { operation_id: string, role: string, behavior_md?: string, };
 
 export type SubjektivSubjectDeleteRequest = { operation_id: string, };
 
diff --git a/web/workspace/src/lib/generated/repository-api.ts b/web/workspace/src/lib/generated/repository-api.ts
index 7a4a4bee8..81f19707e 100644
--- a/web/workspace/src/lib/generated/repository-api.ts
+++ b/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 (sha256:2ac605f7ea70d0c725f9993a5c59c4a8c4266cf69184902db7b3ea7fd5932224)
+// Input contract: 0.1.0 (sha256:85593527d939626a32b88d9b2760b531681b087d95fefa5119901fe86d60d76c)
 // 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
diff --git a/web/workspace/src/lib/generated/runtime-api.ts b/web/workspace/src/lib/generated/runtime-api.ts
index 25cf9167f..5d91a36bf 100644
--- a/web/workspace/src/lib/generated/runtime-api.ts
+++ b/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 (sha256:2ac605f7ea70d0c725f9993a5c59c4a8c4266cf69184902db7b3ea7fd5932224)
+// Input contract: 0.1.0 (sha256:85593527d939626a32b88d9b2760b531681b087d95fefa5119901fe86d60d76c)
 // 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
diff --git a/web/workspace/src/lib/generated/ticket-api.ts b/web/workspace/src/lib/generated/ticket-api.ts
index 119fde58e..e643dbc5b 100644
--- a/web/workspace/src/lib/generated/ticket-api.ts
+++ b/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 (sha256:2ac605f7ea70d0c725f9993a5c59c4a8c4266cf69184902db7b3ea7fd5932224)
+// Input contract: 0.1.0 (sha256:85593527d939626a32b88d9b2760b531681b087d95fefa5119901fe86d60d76c)
 // 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
diff --git a/web/workspace/src/lib/generated/worker-launch-api.ts b/web/workspace/src/lib/generated/worker-launch-api.ts
index 9ff1cfd42..7fc5de5f0 100644
--- a/web/workspace/src/lib/generated/worker-launch-api.ts
+++ b/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 (sha256:2ac605f7ea70d0c725f9993a5c59c4a8c4266cf69184902db7b3ea7fd5932224)
+// Input contract: 0.1.0 (sha256:85593527d939626a32b88d9b2760b531681b087d95fefa5119901fe86d60d76c)
 // 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
diff --git a/web/workspace/src/lib/workspace/memory/api.ts b/web/workspace/src/lib/workspace/memory/api.ts
index 8bb095fd1..027004335 100644
--- a/web/workspace/src/lib/workspace/memory/api.ts
+++ b/web/workspace/src/lib/workspace/memory/api.ts
@@ -117,6 +117,18 @@ export class SubjektivSubjectCreateError extends Error {
 export function validateSubjektivSubjectCreateRequest(
   request: SubjektivSubjectCreateRequest,
 ): SubjektivSubjectCreateRequest {
+  if (
+    typeof request.operation_id !== "string" ||
+    request.operation_id.length === 0 ||
+    new TextEncoder().encode(request.operation_id).byteLength > 256 ||
+    request.operation_id.trim() !== request.operation_id ||
+    /[\p{Cc}*]/u.test(request.operation_id)
+  ) {
+    throw new SubjektivSubjectCreateError(
+      "validation",
+      "Subject operation_id must be nonempty, at most 256 bytes, and contain no surrounding whitespace, control characters, or '*'.",
+    );
+  }
   if (request.role.trim().length === 0) {
     throw new SubjektivSubjectCreateError(
       "validation",
@@ -135,7 +147,11 @@ export function validateSubjektivSubjectCreateRequest(
   }
   const behaviorMd = request.behavior_md ?? "";
   validateSubjectBehavior(behaviorMd);
-  return { role: request.role, behavior_md: behaviorMd };
+  return {
+    operation_id: request.operation_id,
+    role: request.role,
+    behavior_md: behaviorMd,
+  };
 }
 
 function validateSubjectBehavior(behaviorMd: string): void {
@@ -224,6 +240,12 @@ export async function deleteSubjektivSubject(
   }
 }
 
+/**
+ * 呼出元は意図した作成ごとにoperation_idを一度だけ採番し、結果不明なら
+ * 同じID・role・behavior_mdの要求全体を保持する。この関数は自動再試行しない。
+ * 厳密な再送は同じSubjectを返し、同じIDで入力を変えると409になる。
+ * 再送は権限の再付与や削除済みSubjectの復活ではない。
+ */
 export async function createSubjektivSubject(
   fetchFn: typeof fetch,
   workspaceId: string,
@@ -241,7 +263,7 @@ export async function createSubjektivSubject(
   } catch {
     throw new SubjektivSubjectCreateError(
       "unknown_outcome",
-      "The request outcome is unknown. A Subject may have been created.",
+      "The request outcome is unknown. A Subject may have been created. Retry only the same operation_id and full request.",
     );
   }
 
@@ -256,7 +278,7 @@ export async function createSubjektivSubject(
     }
     throw new SubjektivSubjectCreateError(
       "unknown_outcome",
-      "The request outcome is unknown. A Subject may have been created.",
+      "The request outcome is unknown. A Subject may have been created. Retry only the same operation_id and full request.",
       response.status,
     );
   }
@@ -275,7 +297,7 @@ export async function createSubjektivSubject(
   } catch {
     throw new SubjektivSubjectCreateError(
       "unknown_outcome",
-      "The Subject may have been created, but the response could not be confirmed.",
+      "The Subject may have been created, but the response could not be confirmed. Retry only the same operation_id and full request.",
     );
   }
 }
diff --git a/web/workspace/src/routes/w/[workspaceId]/memory/PageContent.svelte b/web/workspace/src/routes/w/[workspaceId]/memory/PageContent.svelte
index dd672b917..0a27469d8 100644
--- a/web/workspace/src/routes/w/[workspaceId]/memory/PageContent.svelte
+++ b/web/workspace/src/routes/w/[workspaceId]/memory/PageContent.svelte
@@ -6,7 +6,7 @@
     createSubjektivSubject,
     SubjektivSubjectCreateError,
   } from '#lib/workspace/memory/api.ts';
-  import type { SubjektivSubjectResponse } from '#lib/generated/memory-api.ts';
+  import type { SubjektivSubjectCreateRequest, SubjektivSubjectResponse } from '#lib/generated/memory-api.ts';
   import type { ResolvedPageData } from '#lib/workspace/navigation/deferred.ts';
   import type { PageData as RouteData } from './$types';
 
@@ -23,6 +23,7 @@
   let roleInvalid = $state(false);
   let behaviorInvalid = $state(false);
   let createOutcomeUnknown = $state(false);
+  let createRequest = $state<SubjektivSubjectCreateRequest | null>(null);
   let createdSubject = $state<SubjektivSubjectResponse | null>(null);
   let createButton = $state<HTMLButtonElement>();
   let roleInput = $state<HTMLInputElement>();
@@ -42,12 +43,14 @@
   }
 
   async function openCreateForm(): Promise<void> {
+    if (submitting || createExpanded) return;
     createExpanded = true;
-    createError = null;
-    roleInvalid = false;
-    behaviorInvalid = false;
-    createOutcomeUnknown = false;
-    createdSubject = null;
+    if (!createOutcomeUnknown) {
+      createError = null;
+      roleInvalid = false;
+      behaviorInvalid = false;
+      createdSubject = null;
+    }
     await tick();
     roleInput?.focus();
   }
@@ -55,13 +58,16 @@
   async function cancelCreate(): Promise<void> {
     if (submitting) return;
     createExpanded = false;
-    role = '';
-    behaviorMd = '';
-    createError = null;
-    roleInvalid = false;
-    behaviorInvalid = false;
-    createOutcomeUnknown = false;
-    createdSubject = null;
+    // 結果不明の要求は閉じても破棄せず、再度開いたときも厳密に再送する。
+    if (!createOutcomeUnknown) {
+      role = '';
+      behaviorMd = '';
+      createRequest = null;
+      createError = null;
+      roleInvalid = false;
+      behaviorInvalid = false;
+      createdSubject = null;
+    }
     await tick();
     createButton?.focus();
   }
@@ -72,13 +78,15 @@
     createError = null;
     roleInvalid = false;
     behaviorInvalid = false;
-    createOutcomeUnknown = false;
     try {
-      const subject = await createSubjektivSubject(fetch, data.workspaceId, {
+      createRequest ??= {
+        operation_id: crypto.randomUUID(),
         role,
         behavior_md: behaviorMd,
-      });
+      };
+      const subject = await createSubjektivSubject(fetch, data.workspaceId, createRequest);
       createdSubject = subject;
+      createOutcomeUnknown = false;
       try {
         await goto(subjectHref(subject.id));
       } catch {
@@ -88,7 +96,8 @@
       if (error instanceof SubjektivSubjectCreateError) {
         roleInvalid = error.kind === 'validation' && error.message.startsWith('Subject role');
         behaviorInvalid = error.kind === 'validation' && error.message.startsWith('Subject behavior');
-        createOutcomeUnknown = error.kind === 'unknown_outcome';
+        // 再送の拒否だけでは、先の結果不明な作成が未実行だったとは確認できない。
+        createOutcomeUnknown ||= error.kind === 'unknown_outcome';
         createError = error.status === 401 || error.status === 403
           ? 'You do not have permission to create Subjects in this Workspace.'
           : error.message;
@@ -102,6 +111,7 @@
         createError = 'The request outcome is unknown. A Subject may have been created.';
       }
     } finally {
+      if (!createOutcomeUnknown && !createdSubject) createRequest = null;
       submitting = false;
     }
   }
@@ -161,7 +171,7 @@
           type="text"
           autocomplete="off"
           required
-          disabled={submitting || createdSubject !== null}
+          disabled={submitting || createOutcomeUnknown || createdSubject !== null}
           onkeydown={createFormKeydown}
           aria-invalid={roleInvalid ? 'true' : undefined}
           aria-describedby={createError && roleInvalid ? 'subject-role-help subject-create-error' : 'subject-role-help'}
@@ -173,7 +183,7 @@
           bind:this={behaviorInput}
           bind:value={behaviorMd}
           rows="7"
-          disabled={submitting || createdSubject !== null}
+          disabled={submitting || createOutcomeUnknown || createdSubject !== null}
           onkeydown={createFormKeydown}
           aria-invalid={behaviorInvalid ? 'true' : undefined}
           aria-describedby={createError && behaviorInvalid ? 'subject-behavior-help subject-create-error' : 'subject-behavior-help'}
diff --git a/web/workspace/src/routes/w/[workspaceId]/memory/memory-page.browser.spec.ts b/web/workspace/src/routes/w/[workspaceId]/memory/memory-page.browser.spec.ts
index 3e54b167c..e94b2342b 100644
--- a/web/workspace/src/routes/w/[workspaceId]/memory/memory-page.browser.spec.ts
+++ b/web/workspace/src/routes/w/[workspaceId]/memory/memory-page.browser.spec.ts
@@ -175,9 +175,13 @@ test("creates one Subject with the exact role and navigates to its generated det
   ];
   expect(path).toBe("/api/w/workspace-1/subjektiv/subjects");
   expect(init.method).toBe("POST");
-  expect(init.body).toBe(
-    '{"role":"  Review lead  ","behavior_md":"Challenge unsupported assumptions."}',
-  );
+  const request = JSON.parse(init.body as string);
+  expect(request).toEqual({
+    operation_id: expect.any(String),
+    role: "  Review lead  ",
+    behavior_md: "Challenge unsupported assumptions.",
+  });
+  expect(request.operation_id).not.toBe("");
 });
 
 test("keeps creation available for an empty list and restores focus on cancel", async () => {
diff --git a/web/workspace/tests/memory-api.test.ts b/web/workspace/tests/memory-api.test.ts
index dae4e6f6b..b114e79ce 100644
--- a/web/workspace/tests/memory-api.test.ts
+++ b/web/workspace/tests/memory-api.test.ts
@@ -271,24 +271,25 @@ Deno.test("Subject list parser preserves the exact bounded response", () => {
 
 Deno.test("Subject create request mirrors Backend role validation without rewriting input", () => {
   assertEquals(
-    validateSubjektivSubjectCreateRequest({ role: "  Release coordinator  " }),
-    { role: "  Release coordinator  ", behavior_md: "" },
+    validateSubjektivSubjectCreateRequest({ operation_id: "create-attempt", role: "  Release coordinator  " }),
+    { operation_id: "create-attempt", role: "  Release coordinator  ", behavior_md: "" },
   );
   assertThrows(
-    () => validateSubjektivSubjectCreateRequest({ role: "   " }),
+    () => validateSubjektivSubjectCreateRequest({ operation_id: "create-attempt", role: "   " }),
     "must not be empty",
   );
   assertThrows(
-    () => validateSubjektivSubjectCreateRequest({ role: "line\nbreak" }),
+    () => validateSubjektivSubjectCreateRequest({ operation_id: "create-attempt", role: "line\nbreak" }),
     "control characters",
   );
   assertThrows(
-    () => validateSubjektivSubjectCreateRequest({ role: "界".repeat(86) }),
+    () => validateSubjektivSubjectCreateRequest({ operation_id: "create-attempt", role: "界".repeat(86) }),
     "at most 256 bytes",
   );
   assertThrows(
     () =>
       validateSubjektivSubjectCreateRequest({
+        operation_id: "create-attempt",
         role: "Reviewer",
         behavior_md: " ".repeat(3),
       }),
@@ -297,6 +298,7 @@ Deno.test("Subject create request mirrors Backend role validation without rewrit
   assertThrows(
     () =>
       validateSubjektivSubjectCreateRequest({
+        operation_id: "create-attempt",
         role: "Reviewer",
         behavior_md: "x".repeat(16 * 1024 + 1),
       }),
@@ -304,6 +306,35 @@ Deno.test("Subject create request mirrors Backend role validation without rewrit
   );
 });
 
+Deno.test("Subject create rejects invalid operation IDs before sending without rewriting them", async () => {
+  let calls = 0;
+  const fetchFn = (async () => {
+    calls += 1;
+    return Response.json(subject());
+  }) as typeof fetch;
+  for (const operationId of [
+    undefined, null, 12, "", " ", " leading", "trailing ", "create*",
+    "line\nbreak", "control\u007F", "x".repeat(257), "界".repeat(86),
+  ]) {
+    const request = JSON.parse(JSON.stringify({
+      operation_id: operationId,
+      role: "Reviewer",
+    }));
+    await assertSubjectCreateRejects(
+      () => createSubjektivSubject(fetchFn, "workspace", request),
+      "validation",
+      "Subject operation_id",
+    );
+  }
+  assertEquals(calls, 0);
+  for (const operationId of [crypto.randomUUID(), "x".repeat(256), "界".repeat(85)]) {
+    assertEquals(
+      validateSubjektivSubjectCreateRequest({ operation_id: operationId, role: "Reviewer" }),
+      { operation_id: operationId, role: "Reviewer", behavior_md: "" },
+    );
+  }
+});
+
 Deno.test("Subject behavior update uses CAS and preserves exact text", async () => {
   const requests: Array<{ path: string; init?: RequestInit }> = [];
   const fetchFn = (async (path: string | URL | Request, init?: RequestInit) => {
@@ -363,6 +394,7 @@ Deno.test("Subject create client sends the exact typed body once and parses the
   }) as typeof fetch;
 
   const created = await createSubjektivSubject(fetchFn, "workspace one", {
+    operation_id: "create-attempt",
     role: "  Release coordinator  ",
     behavior_md: "Stay concise.",
   });
@@ -376,7 +408,7 @@ Deno.test("Subject create client sends the exact typed body once and parses the
   assertEquals(requests[0].init?.method, "POST");
   assertEquals(
     requests[0].init?.body,
-    '{"role":"  Release coordinator  ","behavior_md":"Stay concise."}',
+    '{"operation_id":"create-attempt","role":"  Release coordinator  ","behavior_md":"Stay concise."}',
   );
 });
 
@@ -396,6 +428,7 @@ Deno.test("Subject create client distinguishes rejected and unknown outcomes wit
   await assertSubjectCreateRejects(
     () =>
       createSubjektivSubject(rejectedFetch, "workspace-1", {
+        operation_id: "create-attempt",
         role: "Reviewer",
       }),
     "rejected",
@@ -412,6 +445,7 @@ Deno.test("Subject create client distinguishes rejected and unknown outcomes wit
   await assertSubjectCreateRejects(
     () =>
       createSubjektivSubject(serverErrorFetch, "workspace-1", {
+        operation_id: "create-attempt",
         role: "Reviewer",
       }),
     "unknown_outcome",
@@ -428,6 +462,7 @@ Deno.test("Subject create client distinguishes rejected and unknown outcomes wit
   await assertSubjectCreateRejects(
     () =>
       createSubjektivSubject(mismatchFetch, "workspace-1", {
+        operation_id: "create-attempt",
         role: "Reviewer",
       }),
     "unknown_outcome",
@@ -441,13 +476,65 @@ Deno.test("Subject create client distinguishes rejected and unknown outcomes wit
     throw new TypeError("connection reset");
   }) as typeof fetch;
   await assertSubjectCreateRejects(
-    () => createSubjektivSubject(unknownFetch, "workspace-1", { role: "Reviewer" }),
+    () => createSubjektivSubject(unknownFetch, "workspace-1", { operation_id: "create-attempt", role: "Reviewer" }),
     "unknown_outcome",
     "may have been created",
   );
   assertEquals(unknownCalls, 1);
 });
 
+Deno.test("Subject create exact retry retains serialized operation ID and full input after unknown outcomes", async () => {
+  for (const failure of ["transport", "server", "malformed", "mismatched"] as const) {
+    const request = Object.freeze({
+      operation_id: crypto.randomUUID(),
+      role: "  Release coordinator  ",
+      behavior_md: "Stay concise.\nPreserve exact text.\n",
+    });
+    const bodies: unknown[] = [];
+    const created = { ...subject(), role: request.role, behavior_md: request.behavior_md };
+    const fetchFn = (async (_path: string | URL | Request, init?: RequestInit) => {
+      bodies.push(init?.body);
+      if (bodies.length === 1) {
+        if (failure === "transport") throw new TypeError("connection reset");
+        if (failure === "server") return Response.json({ error: "Internal Server Error" }, { status: 500 });
+        if (failure === "malformed") return new Response("not JSON", { status: 201 });
+        return Response.json({ ...created, behavior_md: "Different input" }, { status: 201 });
+      }
+      return Response.json(created, { status: 201 });
+    }) as typeof fetch;
+    await assertSubjectCreateRejects(
+      () => createSubjektivSubject(fetchFn, "workspace", request),
+      "unknown_outcome",
+      "Retry only the same operation_id and full request",
+      failure === "server" ? 500 : null,
+    );
+    assertEquals(bodies, [JSON.stringify(request)]);
+    assertEquals(await createSubjektivSubject(fetchFn, "workspace", request), created);
+    assertEquals(bodies, [JSON.stringify(request), JSON.stringify(request)]);
+  }
+});
+
+Deno.test("Subject create conflict and deleted-Subject rejection never trigger a fresh operation", async () => {
+  for (const [status, message] of [
+    [409, "operation_id already used with different input"],
+    [404, "Subject was deleted"],
+  ] as const) {
+    const request = { operation_id: crypto.randomUUID(), role: "Reviewer", behavior_md: "Changed input" };
+    const bodies: unknown[] = [];
+    const fetchFn = (async (_path: string | URL | Request, init?: RequestInit) => {
+      bodies.push(init?.body);
+      return Response.json({ message }, { status });
+    }) as typeof fetch;
+    await assertSubjectCreateRejects(
+      () => createSubjektivSubject(fetchFn, "workspace", request),
+      "rejected",
+      message,
+      status,
+    );
+    assertEquals(bodies, [JSON.stringify(request)]);
+  }
+});
+
 Deno.test("Resident surface parser accepts ready-empty and enforces snapshot invariants", () => {
   const readyEmpty = {
     subject_id: "subject-1",