test: isolate local rules and reduce repeated fixture setup

2026-10-16 15:04:52 +09:00
parent 6667985883
commit ffaaf2ecb0
22 changed files with 1692 additions and 825 deletions
@@ -91,6 +91,16 @@ debug = "line-tables-only"
 [profile.dev.package."*"]
 debug = false

+# Keep the real SQLite engine in schema/transaction tests without paying for
+# an unoptimized C interpreter on every statement. Rust test assertions stay enabled.
+[profile.test.package.libsqlite3-sys]
+opt-level = 2
+
+# Schema/authority integration tests execute substantial parsing and validation.
+# Optimize that code without disabling test/debug assertions or overflow checks.
+[profile.test.package.yoi-workspace-server]
+opt-level = 1
+
 [workspace.dependencies]
 # Internal crates
 client = { path = "crates/client" }
@@ -1,13 +1,38 @@
+//! Compile the real public macro through a renamed dependency in an isolated consumer.
+//! Only Cargo artifacts are shared; Cargo checks the fresh consumer on every invocation.
+
 use std::{fs, path::PathBuf, process::Command};

+struct Fixture(PathBuf);
+
+impl Fixture {
+    fn new() -> Self {
+        for attempt in 0..1000 {
+            let path = std::env::temp_dir().join(format!(
+                "api-macros-renamed-dependency-{}-{attempt}",
+                std::process::id()
+            ));
+            match fs::create_dir(&path) {
+                Ok(()) => return Self(path),
+                Err(error) if error.kind() == std::io::ErrorKind::AlreadyExists => continue,
+                Err(error) => panic!("create renamed dependency fixture: {error}"),
+            }
+        }
+        panic!("could not allocate a renamed dependency fixture directory");
+    }
+}
+
+impl Drop for Fixture {
+    fn drop(&mut self) {
+        let _ = fs::remove_dir_all(&self.0);
+    }
+}
+
 #[test]
 fn macro_expansion_resolves_a_renamed_support_dependency() {
-    let fixture = std::env::temp_dir().join(format!(
-        "api-macros-renamed-dependency-{}",
-        std::process::id()
-    ));
-    let _ = fs::remove_dir_all(&fixture);
-    fs::create_dir_all(fixture.join("src")).expect("create fixture source directory");
+    let fixture = Fixture::new();
+    let fixture = &fixture.0;
+    fs::create_dir(fixture.join("src")).expect("create fixture source directory");

    let package_path = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
    let package_path = package_path
@@ -49,13 +74,21 @@ pub fn operation_count() -> usize {
    )
    .expect("write fixture source");

+    // Keep nested Cargo checks off the outer build's target lock. Cargo owns cache
+    // invalidation and locking between concurrent consumers, not a saved
+    // test-success marker.
+    let executable = std::env::current_exe().expect("current test executable");
+    let target_dir = executable
+        .parent()
+        .and_then(|deps| deps.parent())
+        .expect("test executable has a profile directory")
+        .join("compile-tests/api-macros-renamed");
    let output = Command::new(env!("CARGO"))
        .args(["check", "--quiet", "--offline"])
-        .current_dir(&fixture)
-        .env("CARGO_TARGET_DIR", fixture.join("target"))
+        .current_dir(fixture)
+        .env("CARGO_TARGET_DIR", target_dir)
        .output()
        .expect("run cargo check for renamed dependency fixture");
-    let _ = fs::remove_dir_all(&fixture);

    assert!(
        output.status.success(),
@@ -1,3 +1,6 @@
+//! Check the shipped templates against the real PDK and WIT for the guest target.
+//! Each check owns its source and lockfile; Cargo alone shares and validates artifacts.
+
 use std::fs;
 use std::path::Path;
 use std::process::Command;
@@ -135,36 +138,86 @@ fn embedded_service_template_cargo_checks_for_wasm_target() {

 fn cargo_check_template(template: &str) {
    let crate_dir = Path::new(env!("CARGO_MANIFEST_DIR"));
-    let template_dir = crate_dir.join(format!("../../resources/plugin/templates/{template}"));
-    let manifest_path = template_dir.join("Cargo.toml");
-    let lock_path = template_dir.join("Cargo.lock");
-    let _ = fs::remove_file(&lock_path);
+    let templates_dir = crate_dir.join("../../resources/plugin/templates");
+    let template_dir = templates_dir.join(template);

-    let target_dir = tempfile::tempdir().expect("temporary cargo target dir");
-    let cargo = std::env::var("CARGO").unwrap_or_else(|_| "cargo".to_string());
-    let output = Command::new(cargo)
+    // A sibling fixture preserves the shipped relative PDK and WIT paths verbatim.
+    // Never create or remove a lockfile in the shipped template: another invocation
+    // may be checking it at the same time, or a developer may own that lockfile.
+    let fixture = tempfile::Builder::new()
+        .prefix(".cargo-check-")
+        .tempdir_in(&templates_dir)
+        .expect("temporary template fixture");
+    copy_template_tree(&template_dir, fixture.path(), true);
+
+    // Both templates share the PDK dependencies. A separate persistent target
+    // reuses those artifacts without sharing source or the outer Cargo build lock.
+    // Cargo fingerprints and its target lock handle changes and concurrent checks.
+    let executable = std::env::current_exe().expect("current test executable");
+    let target_dir = executable
+        .parent()
+        .and_then(|deps| deps.parent())
+        .expect("test executable has a profile directory")
+        .join("compile-tests/plugin-pdk-templates");
+    let output = Command::new(env!("CARGO"))
        .arg("check")
        .arg("--manifest-path")
-        .arg(&manifest_path)
+        .arg(fixture.path().join("Cargo.toml"))
        .arg("--target")
        .arg("wasm32-unknown-unknown")
        .arg("--offline")
        .arg("--target-dir")
-        .arg(target_dir.path())
+        .arg(target_dir)
+        .current_dir(fixture.path())
        .env("CARGO_TERM_COLOR", "never")
        .output()
        .expect("spawn cargo check for embedded template");

-    let _ = fs::remove_file(&lock_path);
    assert!(
        output.status.success(),
-        "template cargo check failed\nstatus: {}\nstdout:\n{}\nstderr:\n{}",
+        "template {template} cargo check failed\nstatus: {}\nstdout:\n{}\nstderr:\n{}",
        output.status,
        String::from_utf8_lossy(&output.stdout),
        String::from_utf8_lossy(&output.stderr)
    );
 }

+fn copy_template_tree(source: &Path, destination: &Path, is_root: bool) {
+    let metadata = fs::symlink_metadata(source).expect("read template directory metadata");
+    assert!(
+        metadata.is_dir() && !metadata.file_type().is_symlink(),
+        "template input must be a real directory: {}",
+        source.display()
+    );
+    for entry in fs::read_dir(source).expect("read template directory") {
+        let entry = entry.expect("read template entry");
+        let path = entry.path();
+        let kind = entry.file_type().expect("read template entry type");
+        assert!(
+            !kind.is_symlink() && (kind.is_dir() || kind.is_file()),
+            "unsupported template input (including symlinks): {}",
+            path.display()
+        );
+
+        let name = entry.file_name();
+        // Preserve all compiler inputs, including build scripts and nested assets.
+        // Only omit the root build output and lockfile: each isolated consumer must
+        // resolve its own lockfile, as the original unlocked template check did.
+        if is_root
+            && ((kind.is_dir() && name == "target") || (kind.is_file() && name == "Cargo.lock"))
+        {
+            continue;
+        }
+        let copied = destination.join(name);
+        if kind.is_dir() {
+            fs::create_dir(&copied).expect("create template fixture directory");
+            copy_template_tree(&path, &copied, false);
+        } else {
+            fs::copy(&path, &copied).expect("copy unmodified template input");
+        }
+    }
+}
+
 #[test]
 fn pdk_runtime_dependencies_are_guest_side_only() {
    let cargo: Value = toml::from_str(PDK_CARGO).expect("PDK Cargo.toml parses");
@@ -360,10 +360,52 @@ mod tests {
    }

    #[tokio::test]
-    async fn bounded_binary_read_accepts_arbitrary_bytes_at_caller_limit_and_rejects_larger_files()
-    {
+    async fn bounded_binary_read_accepts_caller_limits_above_the_image_tool_limit() {
+        // The caller's limit is a reader policy, not a LocalWorkdir storage contract.
+        // Supply immutable chunks here; the separate component case exercises the
+        // real provider across a chunk boundary without repeatedly hashing 16 MiB.
        let dir = TempDir::new().unwrap();
        let bytes = vec![0xff; 16 * 1024 * 1024];
+        let hash = Sha256::digest(&bytes).into();
+        let responses = bytes
+            .chunks(IMAGE_READ_CHUNK_BYTES)
+            .enumerate()
+            .map(|(index, bytes)| {
+                chunk(
+                    bytes,
+                    (index * IMAGE_READ_CHUNK_BYTES) as u64,
+                    16 * 1024 * 1024,
+                    hash,
+                )
+            })
+            .collect();
+        let session = binary_session(&dir, responses);
+        let path = WorkdirPath::new("artifact.bin").unwrap();
+        assert_eq!(
+            read_workdir_bytes(&session, path.clone(), bytes.len())
+                .await
+                .unwrap(),
+            bytes
+        );
+        let session = binary_session(
+            &dir,
+            vec![chunk(
+                &bytes[..IMAGE_READ_CHUNK_BYTES],
+                0,
+                bytes.len() as u64,
+                hash,
+            )],
+        );
+        assert!(matches!(
+            read_workdir_bytes(&session, path, bytes.len() - 1).await,
+            Err(WorkdirError::InvalidArgument(_))
+        ));
+    }
+
+    #[tokio::test]
+    async fn bounded_binary_read_reassembles_provider_chunks_and_enforces_the_caller_limit() {
+        let dir = TempDir::new().unwrap();
+        let bytes = vec![0xff; IMAGE_READ_CHUNK_BYTES + 1];
        std::fs::write(dir.path().join("artifact.bin"), &bytes).unwrap();
        let session =
            LocalWorkdirSession::new(Scope::writable(dir.path()).unwrap(), dir.path().into());
@@ -59,5 +59,5 @@ futures.workspace = true
 agen.workspace = true
 serial_test = "3.4.0"
 tempfile.workspace = true
-tokio = { workspace = true, features = ["macros", "rt-multi-thread"] }
+tokio = { workspace = true, features = ["macros", "rt-multi-thread", "test-util"] }
 tokio-tungstenite.workspace = true
@@ -2341,6 +2341,7 @@ pub struct WorkerRuntimeExecutionBackend<F = ProfileRuntimeWorkerFactory> {
    pending_restores: Mutex<HashMap<WorkerRef, Arc<PendingRuntimeRestore>>>,
    worker_locks: Mutex<HashMap<WorkerRef, Arc<Mutex<()>>>>,
    spawn_restore_timeout: Duration,
+    shutdown_admission_timeout: Duration,
 }

 impl<F> WorkerRuntimeExecutionBackend<F>
@@ -2362,6 +2363,7 @@ where
            pending_restores: Mutex::new(HashMap::new()),
            worker_locks: Mutex::new(HashMap::new()),
            spawn_restore_timeout: SPAWN_RESTORE_TASK_TIMEOUT,
+            shutdown_admission_timeout: Duration::from_secs(5),
        })
    }

@@ -2881,9 +2883,10 @@ where
        let shutdown_requested = Arc::clone(shutdown_requested);
        let shutdown = shutdown.clone();
        let tasks_for_join = tasks.clone();
+        let admission_timeout = self.shutdown_admission_timeout;
        let cleanup = self.run_joined_on_adapter_runtime(async move {
            tasks_for_join
-                .request_shutdown(&handle, &shutdown_requested, Duration::from_secs(5))
+                .request_shutdown(&handle, &shutdown_requested, admission_timeout)
                .await?;
            tasks_for_join.confirm_shutdown_and_join(&shutdown).await
        });
@@ -3170,9 +3173,10 @@ where
        let shutdown_requested = execution.shutdown_requested.clone();
        let shutdown = execution.shutdown.clone();
        let tasks = execution.tasks.clone();
+        let admission_timeout = self.shutdown_admission_timeout;
        let cleanup = self.run_joined_on_adapter_runtime(async move {
            tasks
-                .request_shutdown(&handle, &shutdown_requested, Duration::from_secs(5))
+                .request_shutdown(&handle, &shutdown_requested, admission_timeout)
                .await?;
            tasks.confirm_shutdown_and_join(&shutdown).await?;
            handle.delete_uncommitted_uploaded_files().map_err(|error| {
@@ -4871,15 +4875,11 @@ mod tests {

    const SAVED_SUBJEKTIV_SYSTEM_PROMPT: &str = "Committed saved Subject Worker system prompt";

-    async fn saved_subjektiv_restore_fixture(
+    fn saved_subjektiv_policy(
        root: &Path,
-        materialize_head: bool,
-    ) -> WorkerExecutionRestoreRequest {
-        let worker_ref = WorkerRef::new(WorkerId::now_v7());
-        let worker_name = ProfileRuntimeWorkerFactory::runtime_worker_name_for_ref(&worker_ref);
-        let aggregate_dir = root.join("workers").join(worker_ref.worker_id.to_string());
-        let session_store = WorkerSessionStore::new(aggregate_dir.join("session")).unwrap();
-        let store = WorkerAggregateStore::new(&aggregate_dir, &worker_name).unwrap();
+        worker_ref: &WorkerRef,
+    ) -> (WorkerManifest, CreateWorkerRequest) {
+        let worker_name = ProfileRuntimeWorkerFactory::runtime_worker_name_for_ref(worker_ref);
        let mut saved = WorkerManifest::from_toml(&format!(
            r#"
            [worker]
@@ -4920,6 +4920,19 @@ mod tests {
            language: "English".to_string(),
        });
        bind_workspace_memory_settings(&mut saved, &request).unwrap();
+        (saved, request)
+    }
+
+    async fn saved_subjektiv_restore_fixture(
+        root: &Path,
+        materialize_head: bool,
+    ) -> WorkerExecutionRestoreRequest {
+        let worker_ref = WorkerRef::new(WorkerId::now_v7());
+        let worker_name = ProfileRuntimeWorkerFactory::runtime_worker_name_for_ref(&worker_ref);
+        let aggregate_dir = root.join("workers").join(worker_ref.worker_id.to_string());
+        let session_store = WorkerSessionStore::new(aggregate_dir.join("session")).unwrap();
+        let store = WorkerAggregateStore::new(&aggregate_dir, &worker_name).unwrap();
+        let (saved, request) = saved_subjektiv_policy(root, &worker_ref);
        let client = MockClient::new(Vec::new());
        let mut engine =
            Engine::<_, agen::state::Mutable, worker::SessionHistoryMetadata>::new_annotated(
@@ -5785,7 +5798,12 @@ mod tests {
    fn duplicate_connect_timeout_retains_candidate_waiter_and_no_false_stop() {
        let root = tempfile::tempdir().unwrap();
        let candidate_root = tempfile::tempdir().unwrap();
-        let (backend, request) = profile_stop_fixture(root.path());
+        let (mut backend, request) = profile_stop_fixture(root.path());
+        // Only admission's deadline is shortened. The real Controller, receipt
+        // correlation, retained candidate and completion/join barriers stay live.
+        // The candidate send is gated below, so timeout is not a scheduler race.
+        let normal_admission_timeout = backend.shutdown_admission_timeout;
+        backend.shutdown_admission_timeout = Duration::from_millis(100);
        let primary = backend
            .workers
            .lock()
@@ -5864,6 +5882,7 @@ mod tests {
                .unwrap()
                .contains_key(&request.worker_ref)
        );
+        backend.shutdown_admission_timeout = normal_admission_timeout;
        release.send(()).unwrap();
        let rejected = backend.stop_worker(&request.worker_ref);
        assert!(!rejected.is_accepted());
@@ -5878,21 +5897,16 @@ mod tests {
    }

    #[test]
-    #[serial_test::serial(worker_allocation)]
    fn pending_restore_join_failure_never_becomes_absence_on_stop_retry() {
        let root = tempfile::tempdir().unwrap();
-        let runtime_store = root.path().join("runtime");
        let backend = WorkerRuntimeExecutionBackend::new(
            ProfileRuntimeWorkerFactory::new(root.path())
-                .with_runtime_store_dir(&runtime_store)
-                .with_runtime_id("runtime-subjektiv-test"),
+                .with_runtime_store_dir(root.path().join("runtime")),
        )
        .unwrap();
-        let request = backend
-            .run_on_adapter_runtime(async move {
-                Ok(saved_subjektiv_restore_fixture(&runtime_store, true).await)
-            })
-            .unwrap();
+        // No Controller was ever published: this is the pending-task ownership
+        // rule, not saved-Session restore. Do not boot a Worker to manufacture it.
+        let request = direct_restore_request(WorkerRef::new(WorkerId::now_v7()));
        let failed = backend
            .spawn_on_adapter_runtime(async {
                panic!("factory scope failed before publishing result")
@@ -6295,6 +6309,41 @@ mod tests {
        );
    }

+    #[test]
+    fn saved_manifest_policy_rejects_mismatched_or_missing_trusted_settings() {
+        let root = tempfile::tempdir().unwrap();
+        let worker_ref = WorkerRef::new(WorkerId::now_v7());
+        let (saved, request) = saved_subjektiv_policy(root.path(), &worker_ref);
+        let mut metadata = WorkerMetadata::new(&saved.worker.name, None);
+        metadata.resolved_manifest_snapshot =
+            Some(manifest::write_persisted_worker_manifest_snapshot(&saved).unwrap());
+        let (restored, _) =
+            ProfileRuntimeWorkerFactory::manifest_for_restore(&metadata, &request).unwrap();
+        assert_eq!(
+            manifest::write_persisted_worker_manifest_snapshot(&restored).unwrap(),
+            metadata.resolved_manifest_snapshot.clone().unwrap()
+        );
+        let mut wrong_settings = request.clone();
+        wrong_settings.memory_settings.as_mut().unwrap().language = "different language".into();
+        let mut detached = request.clone();
+        detached.subjektiv_attached = false;
+        let mut missing_settings = request.clone();
+        missing_settings.memory_settings = None;
+        for (invalid, expected) in [
+            (wrong_settings, "subjektiv settings snapshot mismatch"),
+            (detached, "unauthorized subjektiv attachment"),
+            (missing_settings, "missing its trusted settings snapshot"),
+        ] {
+            let error = ProfileRuntimeWorkerFactory::manifest_for_restore(&metadata, &invalid)
+                .err()
+                .expect("invalid saved policy must be rejected");
+            assert!(error.contains(expected), "{error}");
+        }
+    }
+
+    // Integration: real Worker startup writes the saved Manifest/Session, then
+    // both factory entry points reject it before allocating any live resources.
+    // The local input matrix belongs to saved_manifest_policy_* above.
    #[tokio::test]
    #[serial_test::serial(worker_allocation)]
    async fn profile_factory_saved_manifest_mismatch_rejected_before_live_work() {
@@ -6312,28 +6361,27 @@ mod tests {
            .as_mut()
            .unwrap()
            .language = "different language".into();
-        let mut detached = request.clone();
-        detached.request.subjektiv_attached = false;
-        let mut missing_settings = request.clone();
-        missing_settings.request.memory_settings = None;
-        for (invalid, expected) in [
-            (wrong_settings, "subjektiv settings snapshot mismatch"),
-            (detached, "unauthorized subjektiv attachment"),
-            (missing_settings, "missing its trusted settings snapshot"),
-        ] {
-            let error = factory.preflight_restore(&invalid).await.unwrap_err();
-            assert!(error.contains(expected), "{error}");
-            let error = match factory.restore_controller(invalid).await {
-                Ok(controller) => {
-                    shutdown_profile_controller(controller).await;
-                    panic!("invalid restore started a Controller")
-                }
-                Err(error) => error,
-            };
-            assert!(error.contains(expected), "{error}");
-            assert_eq!(persisted_files(&runtime_store), before);
-            assert!(factory.observation_hub.workers.lock().unwrap().is_empty());
-        }
+        let error = factory
+            .preflight_restore(&wrong_settings)
+            .await
+            .unwrap_err();
+        assert!(
+            error.contains("subjektiv settings snapshot mismatch"),
+            "{error}"
+        );
+        let error = match factory.restore_controller(wrong_settings).await {
+            Ok(controller) => {
+                shutdown_profile_controller(controller).await;
+                panic!("invalid restore started a Controller")
+            }
+            Err(error) => error,
+        };
+        assert!(
+            error.contains("subjektiv settings snapshot mismatch"),
+            "{error}"
+        );
+        assert_eq!(persisted_files(&runtime_store), before);
+        assert!(factory.observation_hub.workers.lock().unwrap().is_empty());
        let run_dir = factory
            .worker_aggregate_dir(&request.worker_ref)
            .unwrap()
@@ -6770,7 +6818,7 @@ mod tests {
        assert!(scope.tasks.lock().unwrap().is_empty());
    }

-    #[tokio::test]
+    #[tokio::test(start_paused = true)]
    async fn execution_scope_timeout_retains_exact_task_until_completion_is_proven() {
        let release = Arc::new(tokio::sync::Notify::new());
        let task_release = Arc::clone(&release);
@@ -7075,29 +7123,35 @@ mod tests {
        );
    }

-    struct DelayedFactory {
-        completed: Arc<AtomicBool>,
-        delay: Duration,
+    struct PendingCreateFactory {
+        started: mpsc::Sender<()>,
+        dropped: mpsc::Sender<()>,
+    }
+
+    struct FactoryFutureDrop(mpsc::Sender<()>);
+
+    impl Drop for FactoryFutureDrop {
+        fn drop(&mut self) {
+            let _ = self.0.send(());
+        }
    }

    #[async_trait]
-    impl RuntimeWorkerFactory for DelayedFactory {
+    impl RuntimeWorkerFactory for PendingCreateFactory {
        async fn spawn_controller(
            &self,
            _request: WorkerExecutionSpawnRequest,
        ) -> Result<RuntimeWorkerController, String> {
-            tokio::time::sleep(self.delay).await;
-            self.completed.store(true, Ordering::SeqCst);
-            Err("delayed factory completed".to_string())
+            let _drop = FactoryFutureDrop(self.dropped.clone());
+            self.started.send(()).unwrap();
+            std::future::pending().await
        }

        async fn restore_controller(
            &self,
            _request: WorkerExecutionRestoreRequest,
        ) -> Result<RuntimeWorkerController, String> {
-            tokio::time::sleep(self.delay).await;
-            self.completed.store(true, Ordering::SeqCst);
-            Err("delayed factory completed".to_string())
+            panic!("create timeout must not restore a Worker")
        }
    }

@@ -7105,11 +7159,12 @@ mod tests {
    fn create_timeout_cancels_factory_and_removes_persisted_worker() {
        let root = tempfile::tempdir().unwrap();
        let runtime_store_dir = root.path().join("runtime");
-        let completed = Arc::new(AtomicBool::new(false));
+        let (started_tx, started) = mpsc::channel();
+        let (dropped_tx, dropped) = mpsc::channel();
        let backend = Arc::new(
-            WorkerRuntimeExecutionBackend::new(DelayedFactory {
-                completed: completed.clone(),
-                delay: Duration::from_millis(200),
+            WorkerRuntimeExecutionBackend::new(PendingCreateFactory {
+                started: started_tx,
+                dropped: dropped_tx,
            })
            .unwrap()
            .with_spawn_restore_timeout(Duration::from_millis(20)),
@@ -7128,7 +7183,9 @@ mod tests {
        let worker_id = request.worker_id;
        let create_runtime = runtime.clone();
        let create = std::thread::spawn(move || create_runtime.create_worker(request));
-        std::thread::sleep(Duration::from_millis(5));
+        started
+            .recv_timeout(Duration::from_secs(5))
+            .expect("factory must start before observing concurrent deletion");

        let delete_error = runtime
            .delete_worker(&crate::identity::WorkerRef::new(worker_id))
@@ -7140,11 +7197,9 @@ mod tests {
            crate::error::RuntimeError::WorkerNotFound { worker_id: missing } if missing == worker_id
        ));
        assert!(error.to_string().contains("was cancelled"));
-        std::thread::sleep(Duration::from_millis(250));
-        assert!(
-            !completed.load(Ordering::SeqCst),
-            "timed out factory future must not resume after create returns"
-        );
+        dropped
+            .try_recv()
+            .expect("cancelled factory future must be dropped before create returns");
        assert!(runtime.list_workers().unwrap().is_empty());
        assert!(backend.workers.lock().unwrap().is_empty());
        assert!(
@@ -212,7 +212,7 @@ mod tests {
        })
        .unwrap();
        let store = Arc::new(
-            SqliteWorkspaceStore::in_memory_for_test()
+            SqliteWorkspaceStore::in_memory_fixture()
                .unwrap()
                .with_db_executor(executor),
        );
@@ -237,6 +237,25 @@ impl SqliteWorkspaceAuthority {
        let database_path = database_path.into();
        let workspace_id = workspace_id.into();
        let store = SqliteWorkspaceStore::open(&database_path)?;
+        Self::from_store(database_path, workspace_id, store)
+    }
+
+    // Normal API fixtures retain real Ticket/MR stores, but the Workspace schema
+    // was verified when their pristine DB was prepared. Startup still uses new().
+    #[cfg(test)]
+    pub(crate) fn from_fixture_store(
+        database_path: PathBuf,
+        workspace_id: String,
+        store: SqliteWorkspaceStore,
+    ) -> Result<Self> {
+        Self::from_store(database_path, workspace_id, store)
+    }
+
+    fn from_store(
+        database_path: PathBuf,
+        workspace_id: String,
+        store: SqliteWorkspaceStore,
+    ) -> Result<Self> {
        let merge_request_source = Arc::new(AuthorityMergeRequestSource {
            store: store.clone(),
        });
@@ -795,7 +795,7 @@ mod tests {
    }

    async fn open_store() -> SqliteWorkspaceStore {
-        let store = SqliteWorkspaceStore::in_memory_for_test().unwrap();
+        let store = SqliteWorkspaceStore::in_memory_fixture().unwrap();
        store.upsert_workspace(&workspace()).await.unwrap();
        store
    }
@@ -1321,26 +1321,28 @@ mod tests {
        assert!(main_config_has_schema_assertion(DEFAULT_MAIN_CONFIG_SOURCE));
    }

-    #[tokio::test]
-    async fn candidate_normalizes_main_and_formats_changed_decodal_sources() {
-        let store = open_store().await;
-        let current = store.load_workspace_config("w-config").unwrap().unwrap();
-        let candidate = store
-            .evaluate_workspace_config_candidate(
-                "w-config",
-                &commit_request(
-                    &current,
-                    vec![
-                        update_main(&current, "{}"),
-                        ConfigTreeChange::Create {
-                            path: path("module.dcdl"),
-                            content_type: ConfigContentType::Decodal,
-                            content: "{}".into(),
-                        },
-                    ],
-                ),
-            )
-            .unwrap();
+    #[test]
+    fn candidate_normalizes_main_and_formats_changed_decodal_sources() {
+        let current = initial_state().unwrap();
+        let changes = [
+            update_main(&current, "{}"),
+            ConfigTreeChange::Create {
+                path: path("module.dcdl"),
+                content_type: ConfigContentType::Decodal,
+                content: "{}".into(),
+            },
+        ];
+        let identity = (
+            current.contract.fingerprint.clone(),
+            current.projection_digest.clone(),
+        );
+        let candidate = evaluate_candidate(
+            current,
+            identity,
+            &changes,
+            WorkspaceConfigSchemaBundle::empty(),
+        )
+        .unwrap();

        assert_eq!(
            candidate
@@ -1414,34 +1416,44 @@ mod tests {
        );
    }

-    #[tokio::test]
-    async fn required_main_entrypoint_cannot_be_deleted_or_renamed() {
-        let store = open_store().await;
-        let current = store.load_workspace_config("w-config").unwrap().unwrap();
-        let main = current.snapshot.get(&path(MAIN_CONFIG_ENTRYPOINT)).unwrap();
+    #[test]
+    fn required_main_entrypoint_cannot_be_deleted_or_renamed() {
        for change in [
            ConfigTreeChange::Delete {
                path: path(MAIN_CONFIG_ENTRYPOINT),
-                expected_digest: main.content_digest.clone(),
+                expected_digest: "sha256:current".into(),
            },
            ConfigTreeChange::Rename {
                from: path(MAIN_CONFIG_ENTRYPOINT),
                to: path("other.dcdl"),
-                expected_digest: main.content_digest.clone(),
+                expected_digest: "sha256:current".into(),
+            },
+            ConfigTreeChange::Rename {
+                from: path("other.dcdl"),
+                to: path(MAIN_CONFIG_ENTRYPOINT),
+                expected_digest: "sha256:current".into(),
            },
        ] {
-            let error = store
-                .evaluate_workspace_config_candidate(
-                    "w-config",
-                    &commit_request(&current, vec![change]),
-                )
-                .unwrap_err();
+            let error = reject_main_entrypoint_mutation(&[change]).unwrap_err();
            assert!(error.to_string().contains("cannot be"));
        }
    }

+    #[test]
+    fn entrypoint_request_requires_exactly_the_server_owned_main() {
+        for entrypoints in [
+            vec![],
+            vec![path("other.dcdl")],
+            vec![path(MAIN_CONFIG_ENTRYPOINT), path("other.dcdl")],
+        ] {
+            let error = validate_entrypoint_request(&entrypoints).unwrap_err();
+            assert!(error.to_string().contains("must be exactly [main.dcdl]"));
+        }
+        validate_entrypoint_request(&[path(MAIN_CONFIG_ENTRYPOINT)]).unwrap();
+    }
+
    #[tokio::test]
-    async fn browser_cannot_replace_server_owned_entrypoint_contract() {
+    async fn candidate_store_rejects_entrypoint_override_and_main_deletion_without_mutation() {
        let store = open_store().await;
        let current = store.load_workspace_config("w-config").unwrap().unwrap();
        let mut request = commit_request(&current, Vec::new());
@@ -1450,11 +1462,33 @@ mod tests {
            .evaluate_workspace_config_candidate("w-config", &request)
            .unwrap_err();
        assert!(error.to_string().contains("must be exactly [main.dcdl]"));
+        let main = current.snapshot.get(&path(MAIN_CONFIG_ENTRYPOINT)).unwrap();
+        let error = store
+            .evaluate_workspace_config_candidate(
+                "w-config",
+                &commit_request(
+                    &current,
+                    vec![ConfigTreeChange::Delete {
+                        path: path(MAIN_CONFIG_ENTRYPOINT),
+                        expected_digest: main.content_digest.clone(),
+                    }],
+                ),
+            )
+            .unwrap_err();
+        assert!(error.to_string().contains("cannot be deleted"));
+        assert_eq!(
+            store
+                .load_workspace_config("w-config")
+                .unwrap()
+                .unwrap()
+                .snapshot,
+            current.snapshot
+        );
    }

    #[tokio::test]
    async fn invalid_candidate_is_never_persisted() {
-        let store = SqliteWorkspaceStore::in_memory_for_test().unwrap();
+        let store = SqliteWorkspaceStore::in_memory_fixture().unwrap();
        store.upsert_workspace(&workspace()).await.unwrap();
        let current = store.load_workspace_config("w-config").unwrap().unwrap();
        let main = current.snapshot.get(&path(MAIN_CONFIG_ENTRYPOINT)).unwrap();
@@ -1478,7 +1512,7 @@ mod tests {

    #[tokio::test]
    async fn valid_candidate_commits_snapshot_content_and_provenance_atomically() {
-        let store = SqliteWorkspaceStore::in_memory_for_test().unwrap();
+        let store = SqliteWorkspaceStore::in_memory_fixture().unwrap();
        store.upsert_workspace(&workspace()).await.unwrap();
        let current = store.load_workspace_config("w-config").unwrap().unwrap();
        let committed = store
@@ -1496,7 +1530,7 @@ mod tests {

    #[tokio::test]
    async fn stale_cas_cannot_overwrite_newer_tree() {
-        let store = SqliteWorkspaceStore::in_memory_for_test().unwrap();
+        let store = SqliteWorkspaceStore::in_memory_fixture().unwrap();
        store.upsert_workspace(&workspace()).await.unwrap();
        let current = store.load_workspace_config("w-config").unwrap().unwrap();
        let request = commit_request(&current, vec![update_main(&current, "{ answer = 42; }")]);
@@ -1514,7 +1548,7 @@ mod tests {

    #[tokio::test]
    async fn committed_content_remains_retrievable_after_later_commit() {
-        let store = SqliteWorkspaceStore::in_memory_for_test().unwrap();
+        let store = SqliteWorkspaceStore::in_memory_fixture().unwrap();
        store.upsert_workspace(&workspace()).await.unwrap();
        let current = store.load_workspace_config("w-config").unwrap().unwrap();
        let first = store
@@ -6681,7 +6681,7 @@ mod tests {
        })
        .unwrap();
        let store = Arc::new(
-            SqliteWorkspaceStore::in_memory_for_test()
+            SqliteWorkspaceStore::in_memory_fixture()
                .unwrap()
                .with_db_executor(executor.clone()),
        );
@@ -1404,7 +1404,7 @@ mod tests {
        WorkerId::from_legacy_u64(1)
    }
    fn setup() -> SqliteWorkspaceStore {
-        let s = SqliteWorkspaceStore::in_memory_for_test().unwrap();
+        let s = SqliteWorkspaceStore::in_memory_fixture().unwrap();
        s.with_conn(|c| {
            c.execute(
                "INSERT INTO accounts(account_id,kind,handle,display_name,created_at,updated_at) \
@@ -3635,6 +3635,38 @@ fn embedded_runtime_request_audience(config: &ServerConfig) -> crate::Result<Str
        })
 }

+#[derive(Clone, Copy)]
+enum WorkspaceDatabasePreparation {
+    Startup,
+    #[cfg(test)]
+    PreparedFixture,
+}
+
+impl WorkspaceDatabasePreparation {
+    fn open_store(self, path: &Path) -> Result<crate::SqliteWorkspaceStore> {
+        match self {
+            Self::Startup => crate::SqliteWorkspaceStore::open(path),
+            #[cfg(test)]
+            Self::PreparedFixture => crate::SqliteWorkspaceStore::connect_prepared_fixture(path),
+        }
+    }
+
+    fn open_authority(
+        self,
+        path: PathBuf,
+        workspace_id: String,
+    ) -> Result<SqliteWorkspaceAuthority> {
+        match self {
+            Self::Startup => SqliteWorkspaceAuthority::new(path, workspace_id),
+            #[cfg(test)]
+            Self::PreparedFixture => {
+                let store = self.open_store(&path)?;
+                SqliteWorkspaceAuthority::from_fixture_store(path, workspace_id, store)
+            }
+        }
+    }
+}
+
 impl WorkspaceApi {
    /// Trusted Workspace-scoped Drive access for backend adapters. This is not
    /// model authorization; callers must authorize requests before using it.
@@ -3856,7 +3888,57 @@ impl WorkspaceApi {
        .await
    }

+    #[cfg(test)]
+    async fn new_api_fixture(
+        config: ServerConfig,
+        execution_backend: Arc<dyn worker_runtime::execution::WorkerExecutionBackend>,
+    ) -> Result<Self> {
+        // Only a newly copied pristine fixture skips repeated Workspace schema
+        // checks. Restart/recovery fixtures retain the complete startup path.
+        let preparation = if config.database_path.exists() {
+            WorkspaceDatabasePreparation::Startup
+        } else {
+            WorkspaceDatabasePreparation::PreparedFixture
+        };
+        let store = Arc::new(crate::SqliteWorkspaceStore::open_api_fixture(
+            &config.database_path,
+        )?);
+        seed_test_registered_workspace(store.as_ref(), &config).await?;
+        Self::new_with_database_preparation(
+            config,
+            store,
+            execution_backend,
+            BackendResourceBroker::default(),
+            HostExecutors::default(),
+            None,
+            preparation,
+        )
+        .await
+    }
+
    async fn new_with_execution_backend_and_broker(
+        config: ServerConfig,
+        store: Arc<dyn ControlPlaneStore>,
+        execution_backend: Arc<dyn worker_runtime::execution::WorkerExecutionBackend>,
+        resource_broker: BackendResourceBroker,
+        host_executors: HostExecutors,
+        worker_remove_dispatcher: Option<
+            Arc<crate::worker_source::EmbeddedServerWorkerMutationDispatcher>,
+        >,
+    ) -> Result<Self> {
+        Self::new_with_database_preparation(
+            config,
+            store,
+            execution_backend,
+            resource_broker,
+            host_executors,
+            worker_remove_dispatcher,
+            WorkspaceDatabasePreparation::Startup,
+        )
+        .await
+    }
+
+    async fn new_with_database_preparation(
        mut config: ServerConfig,
        store: Arc<dyn ControlPlaneStore>,
        execution_backend: Arc<dyn worker_runtime::execution::WorkerExecutionBackend>,
@@ -3865,6 +3947,7 @@ impl WorkspaceApi {
        worker_remove_dispatcher: Option<
            Arc<crate::worker_source::EmbeddedServerWorkerMutationDispatcher>,
        >,
+        database_preparation: WorkspaceDatabasePreparation,
    ) -> Result<Self> {
        if store.get_workspace(&config.workspace_id).await?.is_none() {
            return Err(crate::Error::Config(format!(
@@ -3904,7 +3987,8 @@ impl WorkspaceApi {
        let (config_store, repository_secrets) = executor
            .run(move || {
                let config_store = Arc::new(
-                    crate::SqliteWorkspaceStore::open(database_path.clone())?
+                    database_preparation
+                        .open_store(&database_path)?
                        .with_db_executor(config_executor),
                );
                let repository_secrets = Arc::new(RepositorySecretService::open(
@@ -4005,7 +4089,7 @@ impl WorkspaceApi {
                    .map_err(|error| {
                        Error::Store(format!("failed to register subjektiv storage: {error}"))
                    })?;
-                let authority = SqliteWorkspaceAuthority::new(database_path, workspace_id)?;
+                let authority = database_preparation.open_authority(database_path, workspace_id)?;
                Ok::<_, Error>((feature_storage, registration, authority))
            })
            .await?;
@@ -28226,6 +28310,29 @@ async fn set_worker_retention(
    ))
 }

+fn cleanup_workdir_decision(
+    file_status: CleanupWorkdirFileStatus,
+    cleanliness: CleanupWorkdirCleanliness,
+    running_linked: bool,
+    pinned_linked: bool,
+) -> (CleanupTargetKind, Option<String>) {
+    let action = if cleanup_workdir_file_status_is_record_only(file_status) {
+        CleanupTargetKind::WorkdirRecordDelete
+    } else if !matches!(cleanliness, CleanupWorkdirCleanliness::Dirty) {
+        CleanupTargetKind::WorkdirCleanCleanup
+    } else {
+        CleanupTargetKind::WorkdirDirtyDiscard
+    };
+    let blocking_reason = if running_linked {
+        Some("workdir is linked to a running Worker".to_string())
+    } else if pinned_linked {
+        Some("workdir is linked to a pinned Worker/history".to_string())
+    } else {
+        None
+    };
+    (action, blocking_reason)
+}
+
 fn build_runtime_cleanup_plan(
    api: &WorkspaceApi,
    runtime_id: &str,
@@ -28371,20 +28478,8 @@ fn build_runtime_cleanup_plan(
            .get(record.workdir_id.as_str())
            .map(|summary| cleanup_workdir_cleanliness_from_runtime(summary.cleanliness.as_deref()))
            .unwrap_or_else(|| cleanup_workdir_cleanliness_from_registry(&record.cleanliness));
-        let action = if cleanup_workdir_file_status_is_record_only(file_status) {
-            CleanupTargetKind::WorkdirRecordDelete
-        } else if !matches!(cleanliness, CleanupWorkdirCleanliness::Dirty) {
-            CleanupTargetKind::WorkdirCleanCleanup
-        } else {
-            CleanupTargetKind::WorkdirDirtyDiscard
-        };
-        let blocking_reason = if running_linked {
-            Some("workdir is linked to a running Worker".to_string())
-        } else if pinned_linked {
-            Some("workdir is linked to a pinned Worker/history".to_string())
-        } else {
-            None
-        };
+        let (action, blocking_reason) =
+            cleanup_workdir_decision(file_status, cleanliness, running_linked, pinned_linked);
        let repository_key = api
            .store
            .get_repository(&api.config.workspace_id, repository_id)?
@@ -47647,132 +47742,56 @@ mod tests {
    }

    #[tokio::test]
-    async fn ticket_checker_fake_model_regressions_preserve_classification_boundaries() {
-        struct FakeTicketCheckerModel;
-
-        impl FakeTicketCheckerModel {
-            fn respond(request: &BackendJobRequest) -> Value {
-                let input = ticket_item_checker::parse_input(&request.input).unwrap();
-                assert!(request.instruction.contains("writer_scope"));
-                assert!(request.instruction.contains("internal_inconsistency"));
-                assert!(request.instruction.contains("ambiguous_boundary"));
-                assert!(
-                    request
-                        .instruction
-                        .contains("Production deployment requires approval")
-                );
-                assert!(request.instruction.contains("background, quotations"));
-                if input
-                    .body
-                    .contains("This time I only create the Ticket; I will not implement it.")
-                    && !input.body.starts_with("Background bug example:")
-                {
-                    serde_json::json!({"findings": [{
-                        "category": "writer_scope",
-                        "quote": "I will not implement it",
-                        "reason": "The active requirement records the writer's own implementation boundary.",
-                        "suggestion": "Remove the writer-specific action boundary."
-                    }]})
-                } else if input.body.contains("The rollout region is undecided.")
-                    && input.body.contains("The rollout region is us-east-1.")
-                {
-                    serde_json::json!({"findings": [{
-                        "category": "internal_inconsistency",
-                        "quote": "The rollout region is undecided.",
-                        "reason": "The same active text also settles the rollout region as us-east-1.",
-                        "suggestion": "Choose either the unresolved or settled rollout-region statement."
-                    }]})
-                } else if input.body == "Implementation stops after Ticket creation." {
-                    serde_json::json!({"findings": [{
-                        "category": "ambiguous_boundary",
-                        "quote": "Implementation stops after Ticket creation.",
-                        "reason": "The text alone does not establish whether this is a delivery constraint or the writer's current action boundary.",
-                        "suggestion": "Confirm whether this limits the product workflow or only the current writer."
-                    }]})
-                } else {
-                    serde_json::json!({"findings": []})
-                }
-            }
-        }
-
-        struct Case {
-            name: &'static str,
-            body: &'static str,
-            advisory_quote: Option<&'static str>,
-        }
-        let cases = vec![
-            Case {
-                name: "writer-scope-positive",
-                body: "This time I only create the Ticket; I will not implement it.",
-                advisory_quote: Some("I will not implement it"),
-            },
-            Case {
-                name: "production-approval-negative",
-                body: "Production deployment requires approval.",
-                advisory_quote: None,
-            },
-            Case {
-                name: "quoted-background-negative",
-                body: "Background bug example: a generated Ticket once said “I will not implement it.” Do not reproduce that sentence in generated requirements.",
-                advisory_quote: None,
-            },
-            Case {
-                name: "unresolved-versus-settled-positive",
-                body: "The rollout region is undecided. The rollout region is us-east-1.",
-                advisory_quote: Some("The rollout region is undecided."),
-            },
-            Case {
-                name: "ambiguous-boundary-confirmation",
-                body: "Implementation stops after Ticket creation.",
-                advisory_quote: Some("Implementation stops after Ticket creation."),
-            },
-        ];
-
+    async fn ticket_checker_routes_model_advisory_after_authenticated_save() {
+        let case = ticket_item_checker::test_support::cases()
+            .into_iter()
+            .find(|case| case.name == "writer-scope-positive")
+            .unwrap();
        let temp = tempfile::tempdir().unwrap();
        let (api, execution) = test_api_with_recording_backend(temp.path()).await;
        let source = spawn_ticket_check_source(&api, "ticket-check-boundary-author");
-        for case in cases {
-            let mut input = ticket::NewTicket::new(format!("Boundary case: {}", case.name));
-            input.body = MarkdownText::new(case.body);
-            let Json(TicketBackendOperationResult::TicketRef(reference)) =
-                execute_worker_ticket_test_operation(
-                    State(api.clone()),
-                    AxumPath(ScopedWorkspacePath {
-                        workspace_id: TEST_WORKSPACE_ID.to_string(),
-                    }),
-                    ticket_check_headers(&source),
-                    Json(TicketBackendOperation::Create { input }),
-                )
-                .await
-                .unwrap()
-            else {
-                panic!("{}: unexpected Ticket create result", case.name);
-            };
-            let job = ticket_check_job(&api, &reference.id);
-            let attempt = wait_for_ticket_check_attempt(&api, &job).await;
-            execution.take_inputs();
-            api.accept_backend_job_result(
-                attempt.worker.as_ref().unwrap(),
-                &BackendJobResultSubmission {
-                    job_id: job.request.job_id.clone(),
-                    attempt_id: attempt.attempt_id,
-                    input_digest: job.request.input_digest().unwrap(),
-                    result: FakeTicketCheckerModel::respond(&job.request),
-                },
+        let mut input = ticket::NewTicket::new(format!("Boundary case: {}", case.name));
+        input.body = MarkdownText::new(case.body);
+        let Json(TicketBackendOperationResult::TicketRef(reference)) =
+            execute_worker_ticket_test_operation(
+                State(api.clone()),
+                AxumPath(ScopedWorkspacePath {
+                    workspace_id: TEST_WORKSPACE_ID.to_string(),
+                }),
+                ticket_check_headers(&source),
+                Json(TicketBackendOperation::Create { input }),
            )
-            .unwrap_or_else(|error| panic!("{}: {error}", case.name));
-            let notifications = execution.take_inputs();
-            let advisories = notifications
-                .iter()
-                .filter(|(_, content)| content.contains("[Ticket item checker advisory]"))
-                .collect::<Vec<_>>();
-            match case.advisory_quote {
-                Some(quote) => {
-                    assert_eq!(advisories.len(), 1, "{}", case.name);
-                    assert!(advisories[0].1.contains(quote), "{}", case.name);
-                }
-                None => assert!(advisories.is_empty(), "{}", case.name),
+            .await
+            .unwrap()
+        else {
+            panic!("{}: unexpected Ticket create result", case.name);
+        };
+        let job = ticket_check_job(&api, &reference.id);
+        let attempt = wait_for_ticket_check_attempt(&api, &job).await;
+        execution.take_inputs();
+        api.accept_backend_job_result(
+            attempt.worker.as_ref().unwrap(),
+            &BackendJobResultSubmission {
+                job_id: job.request.job_id.clone(),
+                attempt_id: attempt.attempt_id,
+                input_digest: job.request.input_digest().unwrap(),
+                result: ticket_item_checker::test_support::FakeTicketCheckerModel::respond(
+                    &job.request,
+                ),
+            },
+        )
+        .unwrap_or_else(|error| panic!("{}: {error}", case.name));
+        let notifications = execution.take_inputs();
+        let advisories = notifications
+            .iter()
+            .filter(|(_, content)| content.contains("[Ticket item checker advisory]"))
+            .collect::<Vec<_>>();
+        match case.advisory_quote {
+            Some(quote) => {
+                assert_eq!(advisories.len(), 1, "{}", case.name);
+                assert!(advisories[0].1.contains(quote), "{}", case.name);
            }
+            None => assert!(advisories.is_empty(), "{}", case.name),
        }
    }

@@ -56591,16 +56610,56 @@ mod tests {
            .unwrap();
    }

+    #[tokio::test]
+    async fn api_startup_revalidates_workspace_schema_after_store_was_opened() {
+        let temp = tempfile::tempdir().unwrap();
+        let config = test_server_config(temp.path());
+        let store =
+            Arc::new(SqliteWorkspaceStore::open_api_fixture(&config.database_path).unwrap());
+        seed_test_registered_workspace(store.as_ref(), &config)
+            .await
+            .unwrap();
+        // Do not hold a live API/Runtime while testing startup of the same store:
+        // its exclusive Runtime store lease would reject before schema validation.
+        store
+            .with_conn(|conn| {
+                conn.execute_batch("DROP TRIGGER ticket_assignment_ticket_parent_tombstone;")?;
+                Ok(())
+            })
+            .unwrap();
+        let error = WorkspaceApi::new_for_test(config.clone(), store)
+            .await
+            .err()
+            .expect("API startup must revalidate an already opened store");
+        assert!(
+            error
+                .to_string()
+                .contains("ticket_assignment_ticket_parent_tombstone"),
+            "expected missing-trigger refusal from API startup, got {error:?}"
+        );
+        let error = WorkspaceApi::new_api_fixture(
+            config,
+            Arc::new(DeterministicExecutionBackend::default()),
+        )
+        .await
+        .err()
+        .expect("existing fixture DBs must use production startup");
+        assert!(
+            error
+                .to_string()
+                .contains("ticket_assignment_ticket_parent_tombstone"),
+            "expected missing-trigger refusal reopening fixture, got {error:?}"
+        );
+    }
+
    async fn test_api_with_recording_backend(
        workspace_root: impl Into<PathBuf>,
    ) -> (WorkspaceApi, Arc<DeterministicExecutionBackend>) {
        let config = test_server_config(workspace_root);
-        let store = SqliteWorkspaceStore::open_for_test(config.database_path.clone()).unwrap();
        let execution = Arc::new(DeterministicExecutionBackend::default());
-        let api =
-            WorkspaceApi::new_with_execution_backend(config, Arc::new(store), execution.clone())
-                .await
-                .unwrap();
+        let api = WorkspaceApi::new_api_fixture(config, execution.clone())
+            .await
+            .unwrap();
        (api, execution)
    }

@@ -56619,14 +56678,9 @@ mod tests {
        config.repositories[0].source = source;
        config.repositories[0].path = None;
        config.repositories[0].default_selector = Some("develop".to_string());
-        let store = SqliteWorkspaceStore::open_for_test(config.database_path.clone()).unwrap();
-        WorkspaceApi::new_with_execution_backend(
-            config,
-            Arc::new(store),
-            Arc::new(DeterministicExecutionBackend::default()),
-        )
-        .await
-        .unwrap()
+        WorkspaceApi::new_api_fixture(config, Arc::new(DeterministicExecutionBackend::default()))
+            .await
+            .unwrap()
    }

    async fn test_api_with_docs_repository(workspace_root: impl Into<PathBuf>) -> WorkspaceApi {
@@ -56648,14 +56702,9 @@ mod tests {
        docs.path = Some(docs_root);
        docs.default_selector = Some("develop".to_string());
        config.repositories.push(docs);
-        let store = SqliteWorkspaceStore::open_for_test(config.database_path.clone()).unwrap();
-        WorkspaceApi::new_with_execution_backend(
-            config,
-            Arc::new(store),
-            Arc::new(DeterministicExecutionBackend::default()),
-        )
-        .await
-        .unwrap()
+        WorkspaceApi::new_api_fixture(config, Arc::new(DeterministicExecutionBackend::default()))
+            .await
+            .unwrap()
    }

    fn test_owner_actor() -> RequestActor {
@@ -59899,22 +59948,17 @@ mod tests {
        }
    }

-    #[tokio::test]
-    async fn cleanup_plan_offers_normal_revalidation_for_prior_failure_and_unknown() {
-        let workspace = tempfile::tempdir().unwrap();
-        init_clean_git_workspace(workspace.path());
-        let api = test_api(workspace.path()).await;
-        for (id, state) in [
-            ("pending-retry", "pending"),
-            ("unknown-retry", "unknown"),
-            ("corrupt-retry", "corrupted"),
-        ] {
-            seed_cleanup_workdir(&api, id, state, "unknown");
-        }
-        let plan = build_runtime_cleanup_plan(&api, "runtime-test").unwrap();
-        for candidate in plan.workdirs {
-            assert_eq!(candidate.action, CleanupTargetKind::WorkdirCleanCleanup);
-            assert!(candidate.blocking_reason.is_none());
+    #[test]
+    fn cleanup_plan_offers_normal_revalidation_for_prior_failure_and_unknown() {
+        for state in ["pending", "unknown", "corrupted"] {
+            let (action, blocking_reason) = cleanup_workdir_decision(
+                cleanup_workdir_file_status_from_registry(state),
+                cleanup_workdir_cleanliness_from_registry("unknown"),
+                false,
+                false,
+            );
+            assert_eq!(action, CleanupTargetKind::WorkdirCleanCleanup, "{state}");
+            assert!(blocking_reason.is_none(), "{state}");
        }
    }

@@ -2218,167 +2218,188 @@ impl SubjectRemovalFixture {
    }
 }

-#[tokio::test]
-async fn erased_archive_plan_resend_and_reopen_replan_without_republishing_sources() {
-    for stage in ["planned", "executing", "failed"] {
-        for restart in [false, true] {
-            let mut f = SubjectRemovalFixture::new().await;
-            f.disable();
-            let policy = f
-                .api
-                .config_store
-                .worker_retention_policy(TEST_WORKSPACE_ID)
-                .unwrap();
-            let conn = rusqlite::Connection::open(&f.api.config.database_path).unwrap();
-            let archive_parent = f
-                .dir
-                .path()
-                .join(".test-embedded-runtime-store/archives/workers");
-            if stage == "planned" {
-                conn.execute_batch("CREATE TRIGGER interrupt_removal BEFORE UPDATE OF state ON worker_removal_operations WHEN NEW.state='executing' BEGIN SELECT RAISE(ABORT,'injected execution interruption'); END;").unwrap();
-            } else {
-                // Fail Archive publication before any receipt. Suppress recording
-                // failure too to model the executing-at-Host-stop durable boundary.
-                std::fs::create_dir_all(archive_parent.parent().unwrap()).unwrap();
-                std::fs::write(&archive_parent, "publication blocked").unwrap();
-                if stage == "executing" {
-                    conn.execute_batch("CREATE TRIGGER interrupt_removal BEFORE UPDATE OF state ON worker_removal_operations WHEN NEW.state='failed' BEGIN SELECT RAISE(ABORT,'injected failure-save interruption'); END;").unwrap();
-                }
+// Each case owns a complete isolated fixture; do not serialize independent
+// recovery paths inside one test. Transitions within each helper remain sequential.
+macro_rules! journal_recovery_cases {
+    ($helper:ident; $($name:ident => ($($argument:expr),*)),+ $(,)?) => {
+        $(
+            #[tokio::test]
+            async fn $name() {
+                $helper($($argument),*).await;
            }
-            assert_ne!(f.remove().status, StatusCode::OK.as_u16());
-            conn.execute_batch("DROP TRIGGER IF EXISTS interrupt_removal")
-                .unwrap();
-            if stage != "planned" {
-                std::fs::remove_file(&archive_parent).unwrap();
-            }
-            let old = f
-                .api
-                .config_store
-                .recover_worker_removal_execution(TEST_WORKSPACE_ID, &f.target)
-                .unwrap()
-                .unwrap();
-            assert_eq!(serde_json::to_value(old.plan.state).unwrap(), stage);
-            assert_eq!(
-                old.plan.session_disposition,
-                worker_runtime::retention::SessionDisposition::Archive
-            );
-            f.api
-                .erase_subjektiv_journal_session(
-                    &f.attr.session_id,
-                    "erase-interrupted-archive-plan",
-                )
-                .unwrap();
-            if restart {
-                f = f.reopen().await;
-            }
-            let response = f.remove();
-            assert_eq!(
-                response.status,
-                StatusCode::OK.as_u16(),
-                "{stage}/{restart}: {}",
-                response.body
-            );
-            let saved = f
-                .api
-                .config_store
-                .recover_worker_removal_execution(TEST_WORKSPACE_ID, &f.target)
-                .unwrap()
-                .unwrap();
-            assert_eq!(
-                saved.plan.session_disposition,
-                worker_runtime::retention::SessionDisposition::Purge
-            );
-            assert_eq!(saved.plan.reason, old.plan.reason);
-            assert_ne!(saved.plan.operation_id, old.plan.operation_id);
-            let (state, fingerprint, detail): (String, String, String) = conn.query_row(
-                "SELECT o.state,o.input_fingerprint,a.detail FROM worker_removal_operations o JOIN worker_retention_audit_events a USING(operation_id) WHERE o.operation_id=?1 AND a.event_kind='erased_archive_superseded'",
-                [&old.plan.operation_id], |r| Ok((r.get(0)?,r.get(1)?,r.get(2)?))).unwrap();
-            assert_eq!(state, "stale");
-            assert_eq!(fingerprint, old.plan.input_fingerprint);
-            let detail: Value = serde_json::from_str(&detail).unwrap();
-            assert_eq!(detail["old_acceptance"], "unknown_archive_fenced");
-            assert!(detail["source_removed"].is_null());
-            f.assert_erased_removal();
-            assert_eq!(
-                f.api
-                    .config_store
-                    .worker_retention_policy(TEST_WORKSPACE_ID)
-                    .unwrap(),
-                policy
-            );
-        }
-    }
+        )+
+    };
 }

-#[tokio::test]
-async fn erased_completed_archive_receipt_is_audited_without_republishing_on_resend_or_reopen() {
-    for restart in [false, true] {
-        let mut f = SubjectRemovalFixture::new().await;
-        f.disable();
-        let conn = rusqlite::Connection::open(&f.api.config.database_path).unwrap();
-        // Runtime has committed source_removed, but Backend commit/response is lost.
-        conn.execute_batch("CREATE TRIGGER interrupt_removal BEFORE DELETE ON worker_registry BEGIN SELECT RAISE(ABORT,'injected metadata commit interruption'); END;").unwrap();
-        assert_ne!(f.remove().status, StatusCode::OK.as_u16());
-        conn.execute_batch("DROP TRIGGER interrupt_removal")
-            .unwrap();
-        let old = f
-            .api
-            .config_store
-            .recover_worker_removal_execution(TEST_WORKSPACE_ID, &f.target)
-            .unwrap()
-            .unwrap();
-        assert_eq!(
-            old.plan.state,
-            crate::retention::WorkerRemovalPlanState::Failed
-        );
-        let receipt = f
-            .api
-            .runtime
-            .execute_worker_retention(&f.target, old.runtime_request.clone())
-            .unwrap();
-        assert!(receipt.source_removed);
-        let archive_id = old.plan.archive_id.as_ref().unwrap();
-        let archive_source = f
-            .dir
-            .path()
-            .join(".test-embedded-runtime-store/archives/workers")
-            .join(archive_id)
-            .join("session");
-        assert!(archive_source.exists());
-        // The domain tombstone commits even though retained-source resolution fails.
-        // Recovery must locate only this plan's exact reserved archive, not publish it.
-        assert!(
-            f.api
-                .erase_subjektiv_journal_session(&f.attr.session_id, "erase-transferred-original")
-                .is_err()
-        );
-        assert!(f.store.journal_session_erased(&f.host).unwrap());
-        if restart {
-            f = f.reopen().await;
+async fn assert_erased_archive_plan_replans_without_republishing_sources(
+    stage: &str,
+    restart: bool,
+) {
+    let mut f = SubjectRemovalFixture::new().await;
+    f.disable();
+    let policy = f
+        .api
+        .config_store
+        .worker_retention_policy(TEST_WORKSPACE_ID)
+        .unwrap();
+    let conn = rusqlite::Connection::open(&f.api.config.database_path).unwrap();
+    let archive_parent = f
+        .dir
+        .path()
+        .join(".test-embedded-runtime-store/archives/workers");
+    if stage == "planned" {
+        conn.execute_batch("CREATE TRIGGER interrupt_removal BEFORE UPDATE OF state ON worker_removal_operations WHEN NEW.state='executing' BEGIN SELECT RAISE(ABORT,'injected execution interruption'); END;").unwrap();
+    } else {
+        // Fail Archive publication before any receipt. Suppress recording
+        // failure too to model the executing-at-Host-stop durable boundary.
+        std::fs::create_dir_all(archive_parent.parent().unwrap()).unwrap();
+        std::fs::write(&archive_parent, "publication blocked").unwrap();
+        if stage == "executing" {
+            conn.execute_batch("CREATE TRIGGER interrupt_removal BEFORE UPDATE OF state ON worker_removal_operations WHEN NEW.state='failed' BEGIN SELECT RAISE(ABORT,'injected failure-save interruption'); END;").unwrap();
        }
-        let response = f.remove();
-        assert_eq!(
-            response.status,
-            StatusCode::OK.as_u16(),
-            "{restart}: {}",
-            response.body
-        );
-        let saved = f
-            .api
-            .config_store
-            .recover_worker_removal_execution(TEST_WORKSPACE_ID, &f.target)
-            .unwrap()
-            .unwrap();
-        assert_eq!(saved.plan.operation_id, old.plan.operation_id);
-        assert_eq!(saved.plan.input_fingerprint, old.plan.input_fingerprint);
-        assert_eq!(saved.plan.session_disposition, old.plan.session_disposition);
-        let detail: String = conn.query_row("SELECT detail FROM worker_retention_audit_events WHERE operation_id=?1 AND event_kind='erased_removal_receipt'", [&old.plan.operation_id], |r| r.get(0)).unwrap();
-        let detail: Value = serde_json::from_str(&detail).unwrap();
-        assert_eq!(detail["source_removed"], true);
-        assert_eq!(detail["old_acceptance"], "receipt_confirmed");
-        assert!(!archive_source.exists());
-        f.assert_erased_removal();
    }
+    assert_ne!(f.remove().status, StatusCode::OK.as_u16());
+    conn.execute_batch("DROP TRIGGER IF EXISTS interrupt_removal")
+        .unwrap();
+    if stage != "planned" {
+        std::fs::remove_file(&archive_parent).unwrap();
+    }
+    let old = f
+        .api
+        .config_store
+        .recover_worker_removal_execution(TEST_WORKSPACE_ID, &f.target)
+        .unwrap()
+        .unwrap();
+    assert_eq!(serde_json::to_value(old.plan.state).unwrap(), stage);
+    assert_eq!(
+        old.plan.session_disposition,
+        worker_runtime::retention::SessionDisposition::Archive
+    );
+    f.api
+        .erase_subjektiv_journal_session(&f.attr.session_id, "erase-interrupted-archive-plan")
+        .unwrap();
+    if restart {
+        f = f.reopen().await;
+    }
+    let response = f.remove();
+    assert_eq!(
+        response.status,
+        StatusCode::OK.as_u16(),
+        "{stage}/{restart}: {}",
+        response.body
+    );
+    let saved = f
+        .api
+        .config_store
+        .recover_worker_removal_execution(TEST_WORKSPACE_ID, &f.target)
+        .unwrap()
+        .unwrap();
+    assert_eq!(
+        saved.plan.session_disposition,
+        worker_runtime::retention::SessionDisposition::Purge
+    );
+    assert_eq!(saved.plan.reason, old.plan.reason);
+    assert_ne!(saved.plan.operation_id, old.plan.operation_id);
+    let (state, fingerprint, detail): (String, String, String) = conn.query_row(
+        "SELECT o.state,o.input_fingerprint,a.detail FROM worker_removal_operations o JOIN worker_retention_audit_events a USING(operation_id) WHERE o.operation_id=?1 AND a.event_kind='erased_archive_superseded'",
+        [&old.plan.operation_id], |r| Ok((r.get(0)?,r.get(1)?,r.get(2)?))).unwrap();
+    assert_eq!(state, "stale");
+    assert_eq!(fingerprint, old.plan.input_fingerprint);
+    let detail: Value = serde_json::from_str(&detail).unwrap();
+    assert_eq!(detail["old_acceptance"], "unknown_archive_fenced");
+    assert!(detail["source_removed"].is_null());
+    f.assert_erased_removal();
+    assert_eq!(
+        f.api
+            .config_store
+            .worker_retention_policy(TEST_WORKSPACE_ID)
+            .unwrap(),
+        policy
+    );
+}
+
+journal_recovery_cases! {
+    assert_erased_archive_plan_replans_without_republishing_sources;
+    erased_archive_planned_resend_replans_without_republishing_sources => ("planned", false),
+    erased_archive_planned_reopen_replans_without_republishing_sources => ("planned", true),
+    erased_archive_executing_resend_replans_without_republishing_sources => ("executing", false),
+    erased_archive_executing_reopen_replans_without_republishing_sources => ("executing", true),
+    erased_archive_failed_resend_replans_without_republishing_sources => ("failed", false),
+    erased_archive_failed_reopen_replans_without_republishing_sources => ("failed", true),
+}
+
+async fn assert_erased_completed_archive_receipt_is_audited_without_republishing(restart: bool) {
+    let mut f = SubjectRemovalFixture::new().await;
+    f.disable();
+    let conn = rusqlite::Connection::open(&f.api.config.database_path).unwrap();
+    // Runtime has committed source_removed, but Backend commit/response is lost.
+    conn.execute_batch("CREATE TRIGGER interrupt_removal BEFORE DELETE ON worker_registry BEGIN SELECT RAISE(ABORT,'injected metadata commit interruption'); END;").unwrap();
+    assert_ne!(f.remove().status, StatusCode::OK.as_u16());
+    conn.execute_batch("DROP TRIGGER interrupt_removal")
+        .unwrap();
+    let old = f
+        .api
+        .config_store
+        .recover_worker_removal_execution(TEST_WORKSPACE_ID, &f.target)
+        .unwrap()
+        .unwrap();
+    assert_eq!(
+        old.plan.state,
+        crate::retention::WorkerRemovalPlanState::Failed
+    );
+    let receipt = f
+        .api
+        .runtime
+        .execute_worker_retention(&f.target, old.runtime_request.clone())
+        .unwrap();
+    assert!(receipt.source_removed);
+    let archive_id = old.plan.archive_id.as_ref().unwrap();
+    let archive_source = f
+        .dir
+        .path()
+        .join(".test-embedded-runtime-store/archives/workers")
+        .join(archive_id)
+        .join("session");
+    assert!(archive_source.exists());
+    // The domain tombstone commits even though retained-source resolution fails.
+    // Recovery must locate only this plan's exact reserved archive, not publish it.
+    assert!(
+        f.api
+            .erase_subjektiv_journal_session(&f.attr.session_id, "erase-transferred-original")
+            .is_err()
+    );
+    assert!(f.store.journal_session_erased(&f.host).unwrap());
+    if restart {
+        f = f.reopen().await;
+    }
+    let response = f.remove();
+    assert_eq!(
+        response.status,
+        StatusCode::OK.as_u16(),
+        "{restart}: {}",
+        response.body
+    );
+    let saved = f
+        .api
+        .config_store
+        .recover_worker_removal_execution(TEST_WORKSPACE_ID, &f.target)
+        .unwrap()
+        .unwrap();
+    assert_eq!(saved.plan.operation_id, old.plan.operation_id);
+    assert_eq!(saved.plan.input_fingerprint, old.plan.input_fingerprint);
+    assert_eq!(saved.plan.session_disposition, old.plan.session_disposition);
+    let detail: String = conn.query_row("SELECT detail FROM worker_retention_audit_events WHERE operation_id=?1 AND event_kind='erased_removal_receipt'", [&old.plan.operation_id], |r| r.get(0)).unwrap();
+    let detail: Value = serde_json::from_str(&detail).unwrap();
+    assert_eq!(detail["source_removed"], true);
+    assert_eq!(detail["old_acceptance"], "receipt_confirmed");
+    assert!(!archive_source.exists());
+    f.assert_erased_removal();
+}
+
+journal_recovery_cases! {
+    assert_erased_completed_archive_receipt_is_audited_without_republishing;
+    erased_completed_archive_receipt_resend_is_audited_without_republishing => (false),
+    erased_completed_archive_receipt_reopen_is_audited_without_republishing => (true),
 }

 #[tokio::test]
@@ -2438,206 +2459,206 @@ async fn erased_archive_without_receipt_or_inventory_remains_unknown_without_rep
    assert_eq!(count, 1);
 }

-#[tokio::test]
-async fn erased_archive_retained_diagnostics_receipt_finalizes_only_after_physical_ack_on_resend_or_reopen()
- {
-    for restart in [false, true] {
-        for interrupt_erase in [false, true] {
-            let mut f = SubjectRemovalFixture::new().await;
-            f.disable();
-            let policy = f
-                .api
-                .config_store
-                .worker_retention_policy(TEST_WORKSPACE_ID)
+async fn assert_erased_archive_retained_diagnostics_receipt_finalizes_only_after_physical_ack(
+    restart: bool,
+    interrupt_erase: bool,
+) {
+    let mut f = SubjectRemovalFixture::new().await;
+    f.disable();
+    let policy = f
+        .api
+        .config_store
+        .worker_retention_policy(TEST_WORKSPACE_ID)
+        .unwrap()
+        .unwrap();
+    let policy = f
+        .api
+        .config_store
+        .update_worker_retention_policy(
+            TEST_WORKSPACE_ID,
+            &policy.policy_digest,
+            &crate::retention::WorkerRetentionPolicyUpdate {
+                policy_id: "fixture-retained-diagnostics".into(),
+                session_disposition: policy.session_disposition,
+                metadata_disposition: policy.metadata_disposition,
+                archive_retention: policy.archive_retention,
+                diagnostics_disposition: worker_runtime::retention::DiagnosticsDisposition::Retain,
+                diagnostics_retention_seconds: Some(3600),
+            },
+        )
+        .unwrap();
+    let worker_root = session_root(f.dir.path(), &f.target)
+        .parent()
+        .unwrap()
+        .to_path_buf();
+    std::fs::create_dir_all(worker_root.join("runs/fixture-run")).unwrap();
+    std::fs::write(
+        worker_root.join("runs/fixture-run/worker.out.log"),
+        "diagnostic original",
+    )
+    .unwrap();
+    let conn = rusqlite::Connection::open(&f.api.config.database_path).unwrap();
+    // Real Runtime receipt exists; Backend commit/response is interrupted.
+    conn.execute_batch("CREATE TRIGGER interrupt_removal BEFORE DELETE ON worker_registry BEGIN SELECT RAISE(ABORT,'injected metadata commit interruption'); END;").unwrap();
+    assert_ne!(f.remove().status, StatusCode::OK.as_u16());
+    conn.execute_batch("DROP TRIGGER interrupt_removal")
+        .unwrap();
+    let old = f
+        .api
+        .config_store
+        .recover_worker_removal_execution(TEST_WORKSPACE_ID, &f.target)
+        .unwrap()
+        .unwrap();
+    let runtime_root = f.dir.path().join(".test-embedded-runtime-store");
+    let receipt_path = runtime_root
+        .join("retention/operations")
+        .join(format!("{}.json", old.plan.operation_id));
+    let receipt_bytes = std::fs::read(&receipt_path).unwrap();
+    let receipt = f
+        .api
+        .runtime
+        .execute_worker_retention(&f.target, old.runtime_request.clone())
+        .unwrap();
+    assert!(receipt.source_removed);
+    assert!(receipt.diagnostics_retained);
+    let diagnostics_root = runtime_root
+        .join("archives/diagnostics")
+        .join(&old.plan.operation_id);
+    let diagnostics_manifest = diagnostics_root.join("manifest.json");
+    let diagnostics_bytes = std::fs::read(&diagnostics_manifest).unwrap();
+    let archive_source = runtime_root
+        .join("archives/workers")
+        .join(old.plan.archive_id.as_ref().unwrap())
+        .join("session");
+    assert!(diagnostics_root.exists());
+    assert!(archive_source.exists());
+    // Domain erasure succeeds, but no physical acknowledgement can be
+    // claimed from the old retained locator after aggregate removal.
+    assert!(
+        f.api
+            .erase_subjektiv_journal_session(&f.attr.session_id, "erase-retained-diagnostics")
+            .is_err()
+    );
+    if interrupt_erase {
+        // Runtime must reject mismatched diagnostics identity rather than
+        // acknowledge removal of an unrelated operation. No fake Host ack.
+        let mut damaged: Value = serde_json::from_slice(&diagnostics_bytes).unwrap();
+        damaged["input_fingerprint"] = json!("unrelated-operation");
+        std::fs::write(&diagnostics_manifest, serde_json::to_vec(&damaged).unwrap()).unwrap();
+        let response = f.remove();
+        assert_eq!(
+            response.status,
+            StatusCode::CONFLICT.as_u16(),
+            "{}",
+            response.body
+        );
+        let body: Value = serde_json::from_str(&response.body).unwrap();
+        assert_eq!(body["code"], "erased_removal_reconciliation_unconfirmed");
+        assert!(
+            f.api
+                .store
+                .get_worker_registry(TEST_WORKSPACE_ID, &f.target)
                .unwrap()
-                .unwrap();
-            let policy = f
-                .api
-                .config_store
-                .update_worker_retention_policy(
-                    TEST_WORKSPACE_ID,
-                    &policy.policy_digest,
-                    &crate::retention::WorkerRetentionPolicyUpdate {
-                        policy_id: "fixture-retained-diagnostics".into(),
-                        session_disposition: policy.session_disposition,
-                        metadata_disposition: policy.metadata_disposition,
-                        archive_retention: policy.archive_retention,
-                        diagnostics_disposition:
-                            worker_runtime::retention::DiagnosticsDisposition::Retain,
-                        diagnostics_retention_seconds: Some(3600),
-                    },
-                )
-                .unwrap();
-            let worker_root = session_root(f.dir.path(), &f.target)
-                .parent()
-                .unwrap()
-                .to_path_buf();
-            std::fs::create_dir_all(worker_root.join("runs/fixture-run")).unwrap();
-            std::fs::write(
-                worker_root.join("runs/fixture-run/worker.out.log"),
-                "diagnostic original",
+                .is_some()
+        );
+        let count: i64 = conn.query_row("SELECT COUNT(*) FROM worker_retention_audit_events WHERE operation_id=?1 AND event_kind='erased_removal_receipt'", [&old.plan.operation_id], |r| r.get(0)).unwrap();
+        assert_eq!(
+            count, 0,
+            "failed acknowledgement cannot authorize finalization/audit"
+        );
+        assert_eq!(std::fs::read(&receipt_path).unwrap(), receipt_bytes);
+        let waiting = f
+            .api
+            .config_store
+            .recover_worker_removal_execution(TEST_WORKSPACE_ID, &f.target)
+            .unwrap()
+            .unwrap();
+        assert_eq!(waiting.plan.operation_id, old.plan.operation_id);
+        assert_eq!(waiting.plan.input_fingerprint, old.plan.input_fingerprint);
+        assert_eq!(
+            waiting.plan.state,
+            crate::retention::WorkerRemovalPlanState::Executing
+        );
+        let plans: i64 = conn
+            .query_row(
+                "SELECT COUNT(*) FROM worker_removal_operations WHERE worker_id=?1",
+                [&f.target.worker_id],
+                |r| r.get(0),
            )
            .unwrap();
-            let conn = rusqlite::Connection::open(&f.api.config.database_path).unwrap();
-            // Real Runtime receipt exists; Backend commit/response is interrupted.
-            conn.execute_batch("CREATE TRIGGER interrupt_removal BEFORE DELETE ON worker_registry BEGIN SELECT RAISE(ABORT,'injected metadata commit interruption'); END;").unwrap();
-            assert_ne!(f.remove().status, StatusCode::OK.as_u16());
-            conn.execute_batch("DROP TRIGGER interrupt_removal")
-                .unwrap();
-            let old = f
-                .api
-                .config_store
-                .recover_worker_removal_execution(TEST_WORKSPACE_ID, &f.target)
-                .unwrap()
-                .unwrap();
-            let runtime_root = f.dir.path().join(".test-embedded-runtime-store");
-            let receipt_path = runtime_root
-                .join("retention/operations")
-                .join(format!("{}.json", old.plan.operation_id));
-            let receipt_bytes = std::fs::read(&receipt_path).unwrap();
-            let receipt = f
-                .api
-                .runtime
-                .execute_worker_retention(&f.target, old.runtime_request.clone())
-                .unwrap();
-            assert!(receipt.source_removed);
-            assert!(receipt.diagnostics_retained);
-            let diagnostics_root = runtime_root
-                .join("archives/diagnostics")
-                .join(&old.plan.operation_id);
-            let diagnostics_manifest = diagnostics_root.join("manifest.json");
-            let diagnostics_bytes = std::fs::read(&diagnostics_manifest).unwrap();
-            let archive_source = runtime_root
-                .join("archives/workers")
-                .join(old.plan.archive_id.as_ref().unwrap())
-                .join("session");
-            assert!(diagnostics_root.exists());
-            assert!(archive_source.exists());
-            // Domain erasure succeeds, but no physical acknowledgement can be
-            // claimed from the old retained locator after aggregate removal.
-            assert!(
-                f.api
-                    .erase_subjektiv_journal_session(
-                        &f.attr.session_id,
-                        "erase-retained-diagnostics"
-                    )
-                    .is_err()
-            );
-            if interrupt_erase {
-                // Runtime must reject mismatched diagnostics identity rather than
-                // acknowledge removal of an unrelated operation. No fake Host ack.
-                let mut damaged: Value = serde_json::from_slice(&diagnostics_bytes).unwrap();
-                damaged["input_fingerprint"] = json!("unrelated-operation");
-                std::fs::write(&diagnostics_manifest, serde_json::to_vec(&damaged).unwrap())
-                    .unwrap();
-                let response = f.remove();
-                assert_eq!(
-                    response.status,
-                    StatusCode::CONFLICT.as_u16(),
-                    "{}",
-                    response.body
-                );
-                let body: Value = serde_json::from_str(&response.body).unwrap();
-                assert_eq!(body["code"], "erased_removal_reconciliation_unconfirmed");
-                assert!(
-                    f.api
-                        .store
-                        .get_worker_registry(TEST_WORKSPACE_ID, &f.target)
-                        .unwrap()
-                        .is_some()
-                );
-                let count: i64 = conn.query_row("SELECT COUNT(*) FROM worker_retention_audit_events WHERE operation_id=?1 AND event_kind='erased_removal_receipt'", [&old.plan.operation_id], |r| r.get(0)).unwrap();
-                assert_eq!(
-                    count, 0,
-                    "failed acknowledgement cannot authorize finalization/audit"
-                );
-                assert_eq!(std::fs::read(&receipt_path).unwrap(), receipt_bytes);
-                let waiting = f
-                    .api
-                    .config_store
-                    .recover_worker_removal_execution(TEST_WORKSPACE_ID, &f.target)
-                    .unwrap()
-                    .unwrap();
-                assert_eq!(waiting.plan.operation_id, old.plan.operation_id);
-                assert_eq!(waiting.plan.input_fingerprint, old.plan.input_fingerprint);
-                assert_eq!(
-                    waiting.plan.state,
-                    crate::retention::WorkerRemovalPlanState::Executing
-                );
-                let plans: i64 = conn
-                    .query_row(
-                        "SELECT COUNT(*) FROM worker_removal_operations WHERE worker_id=?1",
-                        [&f.target.worker_id],
-                        |r| r.get(0),
-                    )
-                    .unwrap();
-                assert_eq!(
-                    plans, 1,
-                    "missing physical ack cannot authorize a replacement plan"
-                );
-                std::fs::write(&diagnostics_manifest, &diagnostics_bytes).unwrap();
-            }
-            if restart {
-                f = f.reopen().await;
-            }
-            let response = f.remove();
-            assert_eq!(
-                response.status,
-                StatusCode::OK.as_u16(),
-                "restart={restart}, interrupted={interrupt_erase}: {}",
-                response.body
-            );
-            assert!(!diagnostics_root.exists());
-            assert!(!archive_source.exists());
-            assert_eq!(
-                std::fs::read(&receipt_path).unwrap(),
-                receipt_bytes,
-                "historical Runtime receipt must not be rewritten"
-            );
-            let saved = f
-                .api
-                .config_store
-                .recover_worker_removal_execution(TEST_WORKSPACE_ID, &f.target)
-                .unwrap()
-                .unwrap();
-            assert_eq!(saved.plan.operation_id, old.plan.operation_id);
-            assert_eq!(saved.plan.input_fingerprint, old.plan.input_fingerprint);
-            assert_eq!(
-                saved.plan.diagnostics_disposition,
-                old.plan.diagnostics_disposition
-            );
-            let detail: String = conn.query_row("SELECT detail FROM worker_retention_audit_events WHERE operation_id=?1 AND event_kind='erased_removal_receipt'", [&old.plan.operation_id], |r| r.get(0)).unwrap();
-            let detail: Value = serde_json::from_str(&detail).unwrap();
-            assert_eq!(detail["source_removed"], true);
-            assert_eq!(detail["old_diagnostics_retained"], true);
-            assert_eq!(
-                detail["runtime_erasure_ack"]["session_id"],
-                f.attr.session_id
-            );
-            let diagnostics_catalog: i64 = conn
-                .query_row(
-                    "SELECT COUNT(*) FROM worker_diagnostics_archives WHERE operation_id=?1",
-                    [&old.plan.operation_id],
-                    |r| r.get(0),
-                )
-                .unwrap();
-            assert_eq!(diagnostics_catalog, 0);
-            let tombstone_archive: Option<String> = conn
-                .query_row(
-                    "SELECT archive_id FROM worker_tombstones WHERE operation_id=?1",
-                    [&old.plan.operation_id],
-                    |r| r.get(0),
-                )
-                .unwrap();
-            assert!(tombstone_archive.is_none());
-            f.assert_erased_removal();
-            assert_eq!(
-                f.api
-                    .config_store
-                    .worker_retention_policy(TEST_WORKSPACE_ID)
-                    .unwrap(),
-                Some(policy)
-            );
-        }
+        assert_eq!(
+            plans, 1,
+            "missing physical ack cannot authorize a replacement plan"
+        );
+        std::fs::write(&diagnostics_manifest, &diagnostics_bytes).unwrap();
    }
+    if restart {
+        f = f.reopen().await;
+    }
+    let response = f.remove();
+    assert_eq!(
+        response.status,
+        StatusCode::OK.as_u16(),
+        "restart={restart}, interrupted={interrupt_erase}: {}",
+        response.body
+    );
+    assert!(!diagnostics_root.exists());
+    assert!(!archive_source.exists());
+    assert_eq!(
+        std::fs::read(&receipt_path).unwrap(),
+        receipt_bytes,
+        "historical Runtime receipt must not be rewritten"
+    );
+    let saved = f
+        .api
+        .config_store
+        .recover_worker_removal_execution(TEST_WORKSPACE_ID, &f.target)
+        .unwrap()
+        .unwrap();
+    assert_eq!(saved.plan.operation_id, old.plan.operation_id);
+    assert_eq!(saved.plan.input_fingerprint, old.plan.input_fingerprint);
+    assert_eq!(
+        saved.plan.diagnostics_disposition,
+        old.plan.diagnostics_disposition
+    );
+    let detail: String = conn.query_row("SELECT detail FROM worker_retention_audit_events WHERE operation_id=?1 AND event_kind='erased_removal_receipt'", [&old.plan.operation_id], |r| r.get(0)).unwrap();
+    let detail: Value = serde_json::from_str(&detail).unwrap();
+    assert_eq!(detail["source_removed"], true);
+    assert_eq!(detail["old_diagnostics_retained"], true);
+    assert_eq!(
+        detail["runtime_erasure_ack"]["session_id"],
+        f.attr.session_id
+    );
+    let diagnostics_catalog: i64 = conn
+        .query_row(
+            "SELECT COUNT(*) FROM worker_diagnostics_archives WHERE operation_id=?1",
+            [&old.plan.operation_id],
+            |r| r.get(0),
+        )
+        .unwrap();
+    assert_eq!(diagnostics_catalog, 0);
+    let tombstone_archive: Option<String> = conn
+        .query_row(
+            "SELECT archive_id FROM worker_tombstones WHERE operation_id=?1",
+            [&old.plan.operation_id],
+            |r| r.get(0),
+        )
+        .unwrap();
+    assert!(tombstone_archive.is_none());
+    f.assert_erased_removal();
+    assert_eq!(
+        f.api
+            .config_store
+            .worker_retention_policy(TEST_WORKSPACE_ID)
+            .unwrap(),
+        Some(policy)
+    );
+}
+
+journal_recovery_cases! {
+    assert_erased_archive_retained_diagnostics_receipt_finalizes_only_after_physical_ack;
+    erased_archive_retained_diagnostics_resend_finalizes_only_after_physical_ack => (false, false),
+    erased_archive_retained_diagnostics_interrupted_resend_finalizes_only_after_physical_ack => (false, true),
+    erased_archive_retained_diagnostics_reopen_finalizes_only_after_physical_ack => (true, false),
+    erased_archive_retained_diagnostics_interrupted_reopen_finalizes_only_after_physical_ack => (true, true),
 }
@@ -730,13 +730,31 @@ async fn unsafe_names_and_oversized_text_cannot_publish_and_reads_truncate_at_ut
 #[tokio::test]
 async fn omitted_discovery_limits_use_backend_maximum_pages_in_tools_and_native_wip() {
    let f = Fixture::new(["read_write", "read_only"]).await;
-    let mut expected = std::collections::BTreeSet::new();
-    for index in 0..201 {
-        let created = f
-            .create(&format!("default-page-{index:03}.md"), "bounded")
-            .await;
-        expected.insert(entry(&created)["node_id"].as_str().unwrap().to_owned());
-    }
+    // This case owns discovery defaults, not repeated mutation routing. Seed through
+    // the real Drive owner (including blobs/receipts); reads below retain signed tools/WIP.
+    let drive = f.api.drive().await.unwrap();
+    let expected = tokio::task::spawn_blocking(move || {
+        let root = drive.root().unwrap().id;
+        let mut expected = std::collections::BTreeSet::new();
+        for index in 0..201 {
+            let created = drive
+                .mutate(
+                    &format!("default-page-seed-{index:03}"),
+                    "pagination-fixture",
+                    workspace_drive::Mutation::CreateFile {
+                        parent: root,
+                        name: format!("default-page-{index:03}.md"),
+                        content_type: "text/markdown".into(),
+                        bytes: b"bounded".to_vec(),
+                    },
+                )
+                .unwrap();
+            expected.insert(String::from(created.node.id));
+        }
+        expected
+    })
+    .await
+    .unwrap();
    let native = native_tools(&f.features[1]);
    let root = value(
        native_tool(&native, "Inspect", json!({"path":"/drive","refresh":true}))
@@ -401,6 +401,11 @@ async fn deletion_fences_new_requests_then_drains_without_callback_starvation()
    let callback = gate.admit(true).expect("parent may still need callback");
    reply.send(Ok(read_result())).unwrap();
    assert_json(long.await.unwrap(), StatusCode::OK).await;
+    // HTTP completion may precede cleanup of retained DB/Host request leases.
+    // Keep the callback alive while observing the real parent-drain condition.
+    tokio::time::timeout(BOUND, gate.wait_for_parent_requests_to_drain())
+        .await
+        .expect("completed HTTP request retained its admission through the drain deadline");
    // No new callbacks may prolong the drain once all parents have left.
    assert!(gate.admit(true).is_none());
    assert!(futures::poll!(&mut deletion).is_pending());
@@ -52,6 +52,28 @@ impl WorkspaceAdmission {
        })
    }

+    // Observe parent cleanup without releasing a callback held by the test.
+    // A reply can arrive before the DB/Host job drops its retained request lease.
+    #[cfg(test)]
+    pub(super) async fn wait_for_parent_requests_to_drain(&self) {
+        loop {
+            let changed = self.changed.notified();
+            tokio::pin!(changed);
+            changed.as_mut().enable();
+            {
+                let state = self.state.lock().expect("Workspace admission poisoned");
+                assert!(
+                    state.deleting,
+                    "parent drain observation requires a deletion fence"
+                );
+                if state.requests == 0 {
+                    return;
+                }
+            }
+            changed.await;
+        }
+    }
+
    pub(super) async fn lock_deletion(self: &Arc<Self>) -> DeletionLease {
        let serial = self.deletion.clone().lock_owned().await;
        self.state
@@ -135,3 +157,43 @@ impl Drop for DeletionLease {
            .deleting = false;
    }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::db_executor::DbOperationLifetime;
+
+    #[tokio::test]
+    async fn parent_drain_waits_for_retained_job_cleanup_without_waiting_for_callbacks() {
+        let gate = Arc::new(WorkspaceAdmission::default());
+        let parent = gate.admit(false).unwrap();
+        let retained_job = parent.retain();
+        let mut deletion = Box::pin(gate.lock_deletion());
+        assert!(futures::poll!(&mut deletion).is_pending());
+        let callback = gate.admit(true).unwrap();
+        drop(parent);
+        let mut parents_drained = Box::pin(gate.wait_for_parent_requests_to_drain());
+        assert!(futures::poll!(&mut parents_drained).is_pending());
+        assert!(
+            gate.admit(true).is_some(),
+            "retained parent may still need callbacks"
+        );
+        drop(retained_job);
+        tokio::time::timeout(std::time::Duration::from_secs(5), parents_drained)
+            .await
+            .expect("parent cleanup did not notify the drain observer");
+        assert!(gate.admit(true).is_none());
+        assert!(gate.admit(false).is_none());
+        assert!(
+            futures::poll!(&mut deletion).is_pending(),
+            "callback still owns its lease"
+        );
+        drop(callback);
+        let deletion = tokio::time::timeout(std::time::Duration::from_secs(5), deletion)
+            .await
+            .expect("callback cleanup did not finish deletion drain");
+        assert!(gate.admit(true).is_none());
+        drop(deletion);
+        assert!(gate.admit(false).is_some());
+    }
+}
@@ -15616,6 +15616,10 @@ fn table_columns(conn: &Connection, table_name: &str) -> Result<Vec<String>> {
        .map_err(Error::from)
 }

+#[cfg(test)]
+#[path = "store_test_support.rs"]
+mod test_support;
+
 #[cfg(test)]
 mod tests {
    include!("assignment_tracking_tests.rs");
@@ -15653,7 +15657,7 @@ mod tests {
    fn drive_grants_migrate_and_preserve_audit_through_revoke_worker_delete_and_restart() {
        let t = tempfile::tempdir().unwrap();
        let path = t.path().join("server.db");
-        let store = SqliteWorkspaceStore::open_for_test(&path).unwrap();
+        let store = SqliteWorkspaceStore::open_api_fixture(&path).unwrap();
        let legacy = Connection::open_in_memory().unwrap();
        configure_sqlite(&legacy).unwrap();
        legacy.execute_batch("CREATE TABLE workspaces(workspace_id TEXT PRIMARY KEY);
@@ -15778,7 +15782,7 @@ mod tests {
    }
    #[test]
    fn drive_grants_baseline_constraints_and_worker_lifetime_fail_closed() {
-        let store = SqliteWorkspaceStore::in_memory_for_test().unwrap();
+        let store = SqliteWorkspaceStore::in_memory_fixture().unwrap();
        let proposed = drive_grant_fixture(&store);
        let first = store.create_workspace_drive_grant(&proposed).unwrap();
        store.with_conn(|c| {
@@ -16139,7 +16143,7 @@ mod tests {

    #[tokio::test]
    async fn external_workdir_grant_persists_typed_source_and_fences_generations() {
-        let store = SqliteWorkspaceStore::in_memory_for_test().unwrap();
+        let store = SqliteWorkspaceStore::in_memory_fixture().unwrap();
        store
            .upsert_account(&AccountRecord {
                account_id: "owner".to_string(),
@@ -16890,39 +16894,38 @@ mod tests {
    }

    #[test]
-    fn schema_v59_upgrade_adds_runtime_removal_authority_atomically() {
+    fn schema_v59_upgrade_adds_runtime_removal_authority_atomically() -> Result<()> {
        let temp = tempfile::tempdir().unwrap();
        let path = temp.path().join("server.db");
        prepare_retained_schema(&path, 59);

-        let migrated = SqliteWorkspaceStore::open_for_test(&path).unwrap();
-        migrated
-            .with_conn(|conn| {
-                let table_count: i64 = conn.query_row(
-                    "SELECT COUNT(*) FROM sqlite_master \
-                     WHERE type = 'table' AND name = 'runtime_removal_operations'",
-                    [],
-                    |row| row.get(0),
-                )?;
-                let trigger_count: i64 = conn.query_row(
-                    "SELECT COUNT(*) FROM sqlite_master \
-                     WHERE type = 'trigger' AND (\
-                         name LIKE '%_blocked_by_runtime_removal' OR \
-                         name LIKE 'runtime_binding_%_blocked_by_removal'\
-                     )",
-                    [],
-                    |row| row.get(0),
-                )?;
-                let foreign_key_failures: i64 =
-                    conn.query_row("SELECT COUNT(*) FROM pragma_foreign_key_check", [], |row| {
-                        row.get(0)
-                    })?;
-                assert_eq!(table_count, 1);
-                assert_eq!(trigger_count, 18);
-                assert_eq!(foreign_key_failures, 0);
-                Ok(())
-            })
-            .unwrap();
+        let conn = Connection::open(&path)?;
+        configure_sqlite(&conn)?;
+        migrate_runtime_removal_operations_v59_to_v60(&conn)?;
+        assert_eq!(current_schema_version(&conn)?, 60);
+        let table_count: i64 = conn.query_row(
+            "SELECT COUNT(*) FROM sqlite_master \
+             WHERE type = 'table' AND name = 'runtime_removal_operations'",
+            [],
+            |row| row.get(0),
+        )?;
+        let trigger_count: i64 = conn.query_row(
+            "SELECT COUNT(*) FROM sqlite_master \
+             WHERE type = 'trigger' AND (\
+                 name LIKE '%_blocked_by_runtime_removal' OR \
+                 name LIKE 'runtime_binding_%_blocked_by_removal'\
+             )",
+            [],
+            |row| row.get(0),
+        )?;
+        let foreign_key_failures: i64 =
+            conn.query_row("SELECT COUNT(*) FROM pragma_foreign_key_check", [], |row| {
+                row.get(0)
+            })?;
+        assert_eq!(table_count, 1);
+        assert_eq!(trigger_count, 18);
+        assert_eq!(foreign_key_failures, 0);
+        Ok(())
    }

    #[test]
@@ -16931,12 +16934,10 @@ mod tests {
        let path = temp.path().join("server.db");
        prepare_retained_schema(&path, 60);

-        drop(SqliteWorkspaceStore::open_for_test(&path).unwrap());
        let conn = Connection::open(&path).unwrap();
-        assert_eq!(
-            current_schema_version(&conn).unwrap(),
-            LATEST_SCHEMA_VERSION
-        );
+        configure_sqlite(&conn).unwrap();
+        migrate_worker_run_generation_v60_to_v61(&conn).unwrap();
+        assert_eq!(current_schema_version(&conn).unwrap(), 61);
        let columns = conn
            .prepare("PRAGMA table_info(worker_removal_operations)")
            .unwrap()
@@ -17506,34 +17507,100 @@ CREATE UNIQUE INDEX ticket_current_worker_role_idx
    include!("migration_entrypoint_tests.rs");
    include!("legacy_evidence_column_tests.rs");

-    fn prepare_retained_schema(path: &Path, version: i64) {
-        prepare_schema_v52(path);
-        let conn = Connection::open(path).unwrap();
+    #[test]
+    fn retained_fixture_copies_isolate_seed_rows_and_keep_connection_constraints() {
+        let temp = tempfile::tempdir().unwrap();
+        let first = temp.path().join("first.db");
+        prepare_retained_schema(&first, 59);
+        let conn = Connection::open(first).unwrap();
+        conn.execute("INSERT INTO accounts(account_id,kind,handle,display_name,created_at,updated_at) VALUES('owner','user','owner','Owner','1','1')", []).unwrap();
+        let second = temp.path().join("second.db");
+        prepare_retained_schema(&second, 59);
+        let conn = Connection::open(second).unwrap();
        configure_sqlite(&conn).unwrap();
-        for migration in MIGRATIONS
-            .iter()
-            .filter(|migration| migration.version > 52 && migration.version <= version)
-        {
-            (migration.apply)(&conn).unwrap();
+        assert_eq!(current_schema_version(&conn).unwrap(), 59);
+        verify_schema_history(&conn, 59).unwrap();
+        assert_eq!(
+            conn.query_row("SELECT COUNT(*) FROM accounts", [], |row| row
+                .get::<_, i64>(0))
+                .unwrap(),
+            0
+        );
+        assert_eq!(
+            conn.query_row("PRAGMA journal_mode", [], |row| row.get::<_, String>(0))
+                .unwrap(),
+            "wal"
+        );
+        assert!(conn.execute("INSERT INTO workspaces(workspace_id,owner_account_id,display_name,state,created_at,updated_at) VALUES('invalid','missing','Invalid','active','1','1')", []).is_err());
+    }
+
+    fn prepare_retained_schema(path: &Path, version: i64) {
+        // Cache only empty preconditions, built from frozen DDL and real retained
+        // migrations. The test's seeded rows and migration under test are never shared.
+        static TEMPLATES: std::sync::OnceLock<Mutex<std::collections::BTreeMap<i64, Connection>>> =
+            std::sync::OnceLock::new();
+        assert!((52..=LATEST_SCHEMA_VERSION).contains(&version));
+        let mut templates = TEMPLATES
+            .get_or_init(|| Mutex::new(Default::default()))
+            .lock()
+            .unwrap();
+        if !templates.contains_key(&version) {
+            let mut source = Connection::open_in_memory().unwrap();
+            let baseline = if let Some((&baseline, prior)) = templates.range(..=version).next_back()
+            {
+                Backup::new(prior, &mut source)
+                    .unwrap()
+                    .run_to_completion(128, Duration::from_millis(1), None)
+                    .unwrap();
+                configure_sqlite(&source).unwrap();
+                baseline
+            } else {
+                build_schema_v52(&source);
+                52
+            };
+            for migration in MIGRATIONS
+                .iter()
+                .filter(|migration| migration.version > baseline && migration.version <= version)
+            {
+                (migration.apply)(&source).unwrap();
+            }
+            assert_eq!(current_schema_version(&source).unwrap(), version);
+            templates.insert(version, source);
        }
+        let mut conn = Connection::open(path).unwrap();
+        Backup::new(&templates[&version], &mut conn)
+            .unwrap()
+            .run_to_completion(128, Duration::from_millis(1), None)
+            .unwrap();
+        configure_sqlite(&conn).unwrap();
    }

    fn prepare_schema_v52(path: &Path) {
-        let conn = Connection::open(path).unwrap();
-        configure_sqlite(&conn).unwrap();
+        prepare_retained_schema(path, 52);
+    }
+
+    fn build_schema_v52(conn: &Connection) {
+        configure_sqlite(conn).unwrap();
+        // Batch fixture DDL only, never the production migration under test.
+        // Commit before migration calls and foreign_keys changes below.
+        let fixture = conn.unchecked_transaction().unwrap();
        // Retained fixtures start from genuine pre-tracking Ticket DDL; current
        // component 11 would introduce assignment objects before frozen host 85.
        conn.execute_batch(include_str!("frozen_ticket_schema_v10.sql"))
            .unwrap();
        conn.execute_batch("CREATE TABLE ticket_schema_migrations(version INTEGER PRIMARY KEY,name TEXT NOT NULL,applied_at TEXT NOT NULL); INSERT INTO ticket_schema_migrations VALUES(10,'ticket schema baseline','fixture');").unwrap();
+        fixture.commit().unwrap();
        merge_request::migrate(&conn).unwrap();
        conn.execute_batch("PRAGMA foreign_keys = OFF; PRAGMA legacy_alter_table = ON;")
            .unwrap();
+        let fixture = conn.unchecked_transaction().unwrap();
        create_frozen_schema_v85(&conn).unwrap();
        downgrade_assignment_work_schema(&conn);
        downgrade_schema_66_ticket_and_workdir_authority(&conn).unwrap();
+        fixture.commit().unwrap();
        conn.execute_batch("PRAGMA legacy_alter_table = OFF; PRAGMA foreign_keys = ON;")
            .unwrap();
+        let fixture = conn.unchecked_transaction().unwrap();
        conn.execute_batch(
            r#"
            DROP TABLE workdir_create_credential_revision_retentions;
@@ -17598,12 +17665,14 @@ CREATE UNIQUE INDEX ticket_current_worker_role_idx
            "#,
        )
        .unwrap();
+        fixture.commit().unwrap();
    }

    fn prepare_schema_v50(path: &Path, workspace_id: Option<&str>) {
        prepare_schema_v52(path);
        let conn = Connection::open(path).unwrap();
        configure_sqlite(&conn).unwrap();
+        let fixture = conn.unchecked_transaction().unwrap();
        conn.execute_batch(
            r#"
            DROP TABLE workspace_runtime_binding_audit;
@@ -17654,6 +17723,7 @@ CREATE UNIQUE INDEX ticket_current_worker_role_idx
            [],
        )
        .unwrap();
+        fixture.commit().unwrap();
    }

    #[test]
@@ -18487,10 +18557,8 @@ CREATE UNIQUE INDEX ticket_current_worker_role_idx
            [],
        )
        .unwrap();
-        drop(conn);
-
-        SqliteWorkspaceStore::migrate_database(&path).unwrap();
-        let conn = Connection::open(&path).unwrap();
+        migrate_workspace_runtime_bindings_v50_to_v51(&conn).unwrap();
+        assert_eq!(current_schema_version(&conn).unwrap(), 51);
        let binding_workspaces = {
            let mut stmt = conn
                .prepare(
@@ -18525,7 +18593,9 @@ CREATE UNIQUE INDEX ticket_current_worker_role_idx
        let path = temp.path().join("server.db");
        prepare_schema_v50(&path, None);

-        let plan = SqliteWorkspaceStore::migration_plan(&path).unwrap();
+        let conn = Connection::open(&path).unwrap();
+        configure_sqlite(&conn).unwrap();
+        let plan = workspace_schema_migration_plan(&conn).unwrap();
        assert_eq!(plan.current_schema_version, 50);
        assert_eq!(plan.target_schema_version, LATEST_SCHEMA_VERSION);

@@ -18535,12 +18605,10 @@ CREATE UNIQUE INDEX ticket_current_worker_role_idx
        assert!(!table_exists(&unchanged, "workspace_runtime_bindings").unwrap());
        drop(unchanged);

-        SqliteWorkspaceStore::migrate_database(&path).unwrap();
+        migrate_workspace_runtime_bindings_v50_to_v51(&conn).unwrap();
+        drop(conn);
        let migrated = Connection::open(&path).unwrap();
-        assert_eq!(
-            current_schema_version(&migrated).unwrap(),
-            LATEST_SCHEMA_VERSION
-        );
+        assert_eq!(current_schema_version(&migrated).unwrap(), 51);
        assert_eq!(
            migrated
                .query_row(
@@ -18564,7 +18632,8 @@ CREATE UNIQUE INDEX ticket_current_worker_role_idx
    }

    #[test]
-    fn schema_v52_migrates_deletion_operations_and_normalizes_incomplete_reservations() {
+    fn schema_v52_migrates_deletion_operations_and_normalizes_incomplete_reservations() -> Result<()>
+    {
        let temp = tempfile::tempdir().unwrap();
        let path = temp.path().join("server.db");
        prepare_schema_v52(&path);
@@ -18590,59 +18659,51 @@ CREATE UNIQUE INDEX ticket_current_worker_role_idx
             );",
        )
        .unwrap();
-        drop(conn);
-
-        let store = SqliteWorkspaceStore::open_for_test(&path).unwrap();
-        store
-            .with_conn(|conn| {
-                assert_eq!(current_schema_version(conn)?, LATEST_SCHEMA_VERSION);
-                verify_workspace_deletion_schema(conn)?;
-                let reservation_state: String = conn.query_row(
-                    "SELECT state FROM worker_create_reservations WHERE workspace_id='workspace-a' AND allocation_key='allocation'",
-                    [],
-                    |row| row.get(0),
-                )?;
-                assert_eq!(reservation_state, "created");
-                let reservation_memory = conn.query_row(
-                    "SELECT request_fingerprint, memory_language
-                     FROM worker_create_reservations
-                     WHERE workspace_id='workspace-a' AND allocation_key='allocation'",
-                    [],
-                    |row| {
-                        Ok((
-                            row.get::<_, Option<String>>(0)?,
-                            row.get::<_, Option<String>>(1)?,
-                        ))
-                    },
-                )?;
-                assert_eq!(reservation_memory, (None, None));
-                let complete_memory = conn.query_row(
-                    "SELECT request_fingerprint, memory_language
-                     FROM worker_create_reservations
-                     WHERE workspace_id='workspace-a' AND allocation_key='allocation-complete'",
-                    [],
-                    |row| {
-                        Ok((
-                            row.get::<_, Option<String>>(0)?,
-                            row.get::<_, Option<String>>(1)?,
-                        ))
-                    },
-                )?;
-                assert_eq!(
-                    complete_memory,
-                    (
-                        Some("request-complete".to_string()),
-                        Some("ja".to_string())
-                    )
-                );
-                let violations: i64 =
-                    conn.query_row("SELECT COUNT(*) FROM pragma_foreign_key_check", [], |row| {
-                        row.get(0)
-                    })?;
-                assert_eq!(violations, 0);
-                Ok(())
-            })
-            .unwrap();
+        configure_sqlite(&conn)?;
+        migrate_workspace_deletion_v52_to_v53(&conn)?;
+        assert_eq!(current_schema_version(&conn)?, 53);
+        verify_workspace_deletion_schema(&conn)?;
+        let reservation_state: String = conn.query_row(
+            "SELECT state FROM worker_create_reservations WHERE workspace_id='workspace-a' AND allocation_key='allocation'",
+            [],
+            |row| row.get(0),
+        )?;
+        assert_eq!(reservation_state, "created");
+        let reservation_memory = conn.query_row(
+            "SELECT request_fingerprint, memory_language
+             FROM worker_create_reservations
+             WHERE workspace_id='workspace-a' AND allocation_key='allocation'",
+            [],
+            |row| {
+                Ok((
+                    row.get::<_, Option<String>>(0)?,
+                    row.get::<_, Option<String>>(1)?,
+                ))
+            },
+        )?;
+        assert_eq!(reservation_memory, (None, None));
+        let complete_memory = conn.query_row(
+            "SELECT request_fingerprint, memory_language
+             FROM worker_create_reservations
+             WHERE workspace_id='workspace-a' AND allocation_key='allocation-complete'",
+            [],
+            |row| {
+                Ok((
+                    row.get::<_, Option<String>>(0)?,
+                    row.get::<_, Option<String>>(1)?,
+                ))
+            },
+        )?;
+        assert_eq!(
+            complete_memory,
+            (Some("request-complete".to_string()), Some("ja".to_string()))
+        );
+        let violations: i64 =
+            conn.query_row("SELECT COUNT(*) FROM pragma_foreign_key_check", [], |row| {
+                row.get(0)
+            })?;
+        assert_eq!(violations, 0);
+        Ok(())
    }

    #[test]
@@ -18718,7 +18779,7 @@ CREATE UNIQUE INDEX ticket_current_worker_role_idx
    fn runtime_binding_identity_and_trust_uniqueness_are_workspace_scoped() {
        let temp = tempfile::tempdir().unwrap();
        let path = temp.path().join("server.db");
-        let store = SqliteWorkspaceStore::open_for_test(&path).unwrap();
+        let store = SqliteWorkspaceStore::open_api_fixture(&path).unwrap();
        store
            .with_conn(|conn| {
                conn.execute_batch(
@@ -18870,7 +18931,7 @@ CREATE UNIQUE INDEX ticket_current_worker_role_idx
    fn workspace_runtime_connection_persists_without_authentication_evidence() {
        let temp = tempfile::tempdir().unwrap();
        let path = temp.path().join("server.db");
-        let store = SqliteWorkspaceStore::open_for_test(&path).unwrap();
+        let store = SqliteWorkspaceStore::open_api_fixture(&path).unwrap();
        store
            .with_conn(|conn| {
                conn.execute_batch(
@@ -19169,7 +19230,7 @@ CREATE UNIQUE INDEX ticket_current_worker_role_idx

    #[test]
    fn runtime_binding_key_mutations_are_identity_guarded_idempotent_and_audited() {
-        let store = SqliteWorkspaceStore::in_memory_for_test().unwrap();
+        let store = SqliteWorkspaceStore::in_memory_fixture().unwrap();
        store
            .with_conn(|conn| {
                conn.execute_batch(
@@ -19307,7 +19368,7 @@ CREATE UNIQUE INDEX ticket_current_worker_role_idx

    #[test]
    fn embedded_runtime_binding_can_explicitly_rotate_restart_identity() {
-        let store = SqliteWorkspaceStore::in_memory_for_test().unwrap();
+        let store = SqliteWorkspaceStore::in_memory_fixture().unwrap();
        store
            .with_conn(|conn| {
                conn.execute_batch(
@@ -19419,7 +19480,7 @@ CREATE UNIQUE INDEX ticket_current_worker_role_idx
    async fn workspace_schema_rejects_cross_workspace_ticket_repository_reference_at_write_time() {
        let dir = tempfile::tempdir().unwrap();
        let database_path = dir.path().join("workspace.sqlite");
-        let store = SqliteWorkspaceStore::open_for_test(&database_path).unwrap();
+        let store = SqliteWorkspaceStore::open_api_fixture(&database_path).unwrap();
        for workspace_id in ["workspace-a", "workspace-b"] {
            store
                .upsert_workspace(&WorkspaceRecord {
@@ -19513,7 +19574,7 @@ CREATE UNIQUE INDEX ticket_current_worker_role_idx
    async fn workspace_display_name_update_is_timestamp_guarded_and_preserves_identity() {
        let dir = tempfile::tempdir().unwrap();
        let database_path = dir.path().join("server.db");
-        let store = SqliteWorkspaceStore::open_for_test(&database_path).unwrap();
+        let store = SqliteWorkspaceStore::open_api_fixture(&database_path).unwrap();
        let record = WorkspaceRecord {
            workspace_id: "workspace-a".to_string(),
            owner_account_id: "owner-account".to_string(),
@@ -19566,7 +19627,7 @@ CREATE UNIQUE INDEX ticket_current_worker_role_idx
    #[tokio::test]
    async fn objective_creation_allocates_and_resolves_workspace_resource_key() {
        let dir = tempfile::tempdir().unwrap();
-        let store = SqliteWorkspaceStore::open_for_test(dir.path().join("server.db")).unwrap();
+        let store = SqliteWorkspaceStore::open_api_fixture(dir.path().join("server.db")).unwrap();
        store
            .upsert_workspace(&WorkspaceRecord {
                workspace_id: "workspace-a".into(),
@@ -19612,7 +19673,7 @@ CREATE UNIQUE INDEX ticket_current_worker_role_idx
    #[tokio::test]
    async fn worker_create_reservation_allocates_uuid_before_runtime_and_replays_exact_input() {
        let dir = tempfile::tempdir().unwrap();
-        let store = SqliteWorkspaceStore::open_for_test(dir.path().join("server.db")).unwrap();
+        let store = SqliteWorkspaceStore::open_api_fixture(dir.path().join("server.db")).unwrap();
        store
            .upsert_workspace(&WorkspaceRecord {
                workspace_id: "workspace-a".to_string(),
@@ -19916,7 +19977,7 @@ CREATE UNIQUE INDEX ticket_current_worker_role_idx
    async fn worker_singleton_restart_retry_replays_exact_workdir_intent_and_rejects_changes() {
        let dir = tempfile::tempdir().unwrap();
        let database = dir.path().join("server.db");
-        let store = SqliteWorkspaceStore::open_for_test(&database).unwrap();
+        let store = SqliteWorkspaceStore::open_api_fixture(&database).unwrap();
        store
            .upsert_workspace(&WorkspaceRecord {
                workspace_id: "workspace-a".to_string(),
@@ -20020,7 +20081,7 @@ CREATE UNIQUE INDEX ticket_current_worker_role_idx
    async fn worker_singleton_ownership_is_workspace_scoped_durable_and_fences_old_generations() {
        let dir = tempfile::tempdir().unwrap();
        let database = dir.path().join("server.db");
-        let store = SqliteWorkspaceStore::open_for_test(&database).unwrap();
+        let store = SqliteWorkspaceStore::open_api_fixture(&database).unwrap();
        for workspace_id in ["workspace-a", "workspace-b"] {
            store
                .upsert_workspace(&WorkspaceRecord {
@@ -20146,7 +20207,7 @@ CREATE UNIQUE INDEX ticket_current_worker_role_idx
    async fn concurrent_worker_singleton_reservations_have_one_winner() {
        let dir = tempfile::tempdir().unwrap();
        let database = dir.path().join("server.db");
-        let store = SqliteWorkspaceStore::open_for_test(&database).unwrap();
+        let store = SqliteWorkspaceStore::open_api_fixture(&database).unwrap();
        store
            .upsert_workspace(&WorkspaceRecord {
                workspace_id: "workspace-a".to_string(),
@@ -20202,7 +20263,7 @@ CREATE UNIQUE INDEX ticket_current_worker_role_idx
    #[tokio::test]
    async fn workspace_flow_sources_pin_content_and_builtins_stay_resources() {
        let dir = tempfile::tempdir().unwrap();
-        let store = SqliteWorkspaceStore::open_for_test(dir.path().join("server.db")).unwrap();
+        let store = SqliteWorkspaceStore::open_api_fixture(dir.path().join("server.db")).unwrap();
        store
            .upsert_workspace(&WorkspaceRecord {
                workspace_id: "workspace-a".to_string(),
@@ -21144,7 +21205,8 @@ CREATE UNIQUE INDEX ticket_current_worker_role_idx
    // boundary under test. Targets need not be materialized by a Runtime.
    async fn manual_worker_start_store() -> (tempfile::TempDir, SqliteWorkspaceStore) {
        let dir = tempfile::tempdir().unwrap();
-        let store = SqliteWorkspaceStore::open_for_test(dir.path().join("workspace.db")).unwrap();
+        let store =
+            SqliteWorkspaceStore::open_api_fixture(dir.path().join("workspace.db")).unwrap();
        store
            .upsert_workspace(&WorkspaceRecord {
                workspace_id: "w".into(),
@@ -21879,7 +21941,7 @@ CREATE UNIQUE INDEX ticket_current_worker_role_idx
        use ticket::TicketBackend;
        let dir = tempfile::tempdir().unwrap();
        let path = dir.path().join("workspace.db");
-        let store = SqliteWorkspaceStore::open_for_test(&path).unwrap();
+        let store = SqliteWorkspaceStore::open_api_fixture(&path).unwrap();
        store
            .upsert_workspace(&WorkspaceRecord {
                workspace_id: "w".into(),
@@ -22007,7 +22069,7 @@ CREATE UNIQUE INDEX ticket_current_worker_role_idx
    async fn ticket_worker_assignment_replaces_current_and_preserves_audit_history() {
        let dir = tempfile::tempdir().unwrap();
        let db = dir.path().join("server.db");
-        let store = SqliteWorkspaceStore::open_for_test(&db).unwrap();
+        let store = SqliteWorkspaceStore::open_api_fixture(&db).unwrap();
        store
            .upsert_workspace(&WorkspaceRecord {
                workspace_id: "workspace-a".to_string(),
@@ -22322,7 +22384,7 @@ INSERT INTO worker_registry (
    async fn role_assignment_routes_and_manual_start_are_state_fenced_atomically() {
        let dir = tempfile::tempdir().unwrap();
        let db_path = dir.path().join("workspace.db");
-        let store = SqliteWorkspaceStore::open_for_test(&db_path).unwrap();
+        let store = SqliteWorkspaceStore::open_api_fixture(&db_path).unwrap();
        store
            .upsert_workspace(&WorkspaceRecord {
                workspace_id: "workspace-role".to_string(),
@@ -22732,7 +22794,7 @@ INSERT INTO worker_registry (

    #[tokio::test]
    async fn workspace_bootstrap_validates_key_and_rejects_duplicate_workspace() {
-        let store = SqliteWorkspaceStore::in_memory_for_test().unwrap();
+        let store = SqliteWorkspaceStore::in_memory_fixture().unwrap();
        store
            .upsert_account(&AccountRecord {
                account_id: "owner-account".to_string(),
@@ -22864,7 +22926,7 @@ INSERT INTO worker_registry (

    #[tokio::test]
    async fn repository_records_round_trip() {
-        let store = SqliteWorkspaceStore::in_memory_for_test().unwrap();
+        let store = SqliteWorkspaceStore::in_memory_fixture().unwrap();
        assert_eq!(store.schema_version().await.unwrap(), LATEST_SCHEMA_VERSION);
        let workspace = WorkspaceRecord {
            workspace_id: "local-dev".to_string(),
@@ -22945,7 +23007,7 @@ INSERT INTO worker_registry (

    #[tokio::test]
    async fn memory_authority_records_round_trip_and_close_staging() {
-        let store = SqliteWorkspaceStore::in_memory_for_test().unwrap();
+        let store = SqliteWorkspaceStore::in_memory_fixture().unwrap();
        assert_eq!(store.schema_version().await.unwrap(), LATEST_SCHEMA_VERSION);
        let workspace = WorkspaceRecord {
            workspace_id: "local-dev".to_string(),
@@ -23020,7 +23082,7 @@ INSERT INTO worker_registry (

    #[tokio::test]
    async fn legacy_memory_reset_is_atomic_scoped_idempotent_and_exact() {
-        let store = SqliteWorkspaceStore::in_memory_for_test().unwrap();
+        let store = SqliteWorkspaceStore::in_memory_fixture().unwrap();
        for (workspace_id, display_name) in [
            ("local-dev", "Local Dev"),
            ("other-workspace", "Other Workspace"),
@@ -23187,7 +23249,7 @@ INSERT INTO worker_registry (
    async fn worker_workdir_registry_round_trips_and_preserves_pinned_retention() {
        let temp = tempfile::tempdir().unwrap();
        let db = temp.path().join("workspace.db");
-        let store = SqliteWorkspaceStore::open_for_test(&db).unwrap();
+        let store = SqliteWorkspaceStore::open_api_fixture(&db).unwrap();
        let workspace = WorkspaceRecord {
            workspace_id: "local-dev".to_string(),
            owner_account_id: "owner-account".to_string(),
@@ -23604,7 +23666,8 @@ INSERT INTO worker_registry (
    #[tokio::test]
    async fn worker_projection_preserves_equal_local_ids_from_distinct_runtimes() {
        let temp = tempfile::tempdir().unwrap();
-        let store = SqliteWorkspaceStore::open_for_test(temp.path().join("workspace.db")).unwrap();
+        let store =
+            SqliteWorkspaceStore::open_api_fixture(temp.path().join("workspace.db")).unwrap();
        store
            .upsert_workspace(&WorkspaceRecord {
                workspace_id: "local-dev".to_string(),
@@ -23730,7 +23793,8 @@ INSERT INTO worker_registry (
    #[tokio::test]
    async fn worker_projection_reconciles_snapshots_and_preserves_unavailable_lifecycle() {
        let temp = tempfile::tempdir().unwrap();
-        let store = SqliteWorkspaceStore::open_for_test(temp.path().join("workspace.db")).unwrap();
+        let store =
+            SqliteWorkspaceStore::open_api_fixture(temp.path().join("workspace.db")).unwrap();
        store
            .upsert_workspace(&WorkspaceRecord {
                workspace_id: "local-dev".to_string(),
@@ -23905,7 +23969,8 @@ INSERT INTO worker_registry (
    #[tokio::test]
    async fn late_runtime_event_does_not_recreate_retention_deleted_catalog_worker() {
        let temp = tempfile::tempdir().unwrap();
-        let store = SqliteWorkspaceStore::open_for_test(temp.path().join("workspace.db")).unwrap();
+        let store =
+            SqliteWorkspaceStore::open_api_fixture(temp.path().join("workspace.db")).unwrap();
        store
            .upsert_workspace(&WorkspaceRecord {
                workspace_id: "local-dev".to_string(),
@@ -24000,7 +24065,7 @@ INSERT INTO worker_registry (
    async fn worker_control_grants_are_idempotent_scoped_and_support_internal_invalidation() {
        let dir = tempfile::tempdir().unwrap();
        let database = dir.path().join("control-grants.db");
-        let store = SqliteWorkspaceStore::open_for_test(&database).unwrap();
+        let store = SqliteWorkspaceStore::open_api_fixture(&database).unwrap();
        store
            .upsert_workspace(&WorkspaceRecord {
                workspace_id: "workspace-control".to_string(),
@@ -24128,7 +24193,7 @@ INSERT INTO worker_registry (

    #[tokio::test]
    async fn account_and_login_records_round_trip() {
-        let store = SqliteWorkspaceStore::in_memory_for_test().unwrap();
+        let store = SqliteWorkspaceStore::in_memory_fixture().unwrap();
        assert_eq!(store.schema_version().await.unwrap(), LATEST_SCHEMA_VERSION);
        let now = "2026-07-22T00:00:00Z".to_string();
        let account = AccountRecord {
@@ -24488,7 +24553,7 @@ INSERT INTO worker_registry (
    async fn backend_job_resource_reserve_converges_across_connections_without_changing_input() {
        let dir = tempfile::tempdir().unwrap();
        let path = dir.path().join("resource-jobs.sqlite");
-        let store = SqliteWorkspaceStore::open_for_test(&path).unwrap();
+        let store = SqliteWorkspaceStore::open_api_fixture(&path).unwrap();
        seed_resource_job_workspace(&store).await;
        let other = SqliteWorkspaceStore::open_for_test(&path).unwrap();
        let requests = [
@@ -24606,7 +24671,7 @@ INSERT INTO worker_registry (
    async fn backend_job_resource_retry_and_unknown_are_fenced_by_durable_cleanup() {
        let dir = tempfile::tempdir().unwrap();
        let path = dir.path().join("cleanup-jobs.sqlite");
-        let store = SqliteWorkspaceStore::open_for_test(&path).unwrap();
+        let store = SqliteWorkspaceStore::open_api_fixture(&path).unwrap();
        seed_resource_job_workspace(&store).await;
        let request = resource_job_request("failed", "subject-a", "candidate-1");
        let first = store
@@ -24772,7 +24837,7 @@ INSERT INTO worker_registry (
    async fn backend_job_resource_retry_races_new_intent_atomically_and_remains_bounded() {
        let dir = tempfile::tempdir().unwrap();
        let path = dir.path().join("retry-race.sqlite");
-        let store = SqliteWorkspaceStore::open_for_test(&path).unwrap();
+        let store = SqliteWorkspaceStore::open_api_fixture(&path).unwrap();
        seed_resource_job_workspace(&store).await;
        // Generic resources use the same common reservation API without domain grants.
        let mut request = resource_job_request("generic", "subject-a", "candidate-1");
@@ -24881,7 +24946,7 @@ INSERT INTO worker_registry (

    #[tokio::test]
    async fn backend_job_all_older_attempt_cleanups_fence_retry_and_resource_release() {
-        let store = SqliteWorkspaceStore::in_memory_for_test().unwrap();
+        let store = SqliteWorkspaceStore::in_memory_fixture().unwrap();
        seed_resource_job_workspace(&store).await;
        let mut request = resource_job_request("legacy-overlap", "subject-a", "candidate-1");
        request.limits.max_attempts = 3;
@@ -25005,7 +25070,7 @@ INSERT INTO worker_registry (

    #[tokio::test]
    async fn backend_job_empty_batch_surface_refresh_locks_subject_and_defers_candidates() {
-        let store = SqliteWorkspaceStore::in_memory_for_test().unwrap();
+        let store = SqliteWorkspaceStore::in_memory_fixture().unwrap();
        seed_resource_job_workspace(&store).await;
        for surface_state in ["ungenerated", "stale", "failed"] {
            let subject = format!("subject-{surface_state}");
@@ -25125,7 +25190,7 @@ INSERT INTO worker_registry (

    #[tokio::test]
    async fn backend_job_completed_resource_releases_only_after_worker_cleanup() {
-        let store = SqliteWorkspaceStore::in_memory_for_test().unwrap();
+        let store = SqliteWorkspaceStore::in_memory_fixture().unwrap();
        seed_resource_job_workspace(&store).await;
        let request = resource_job_request("completed", "subject-a", "candidate-1");
        let first = store
@@ -25179,7 +25244,7 @@ INSERT INTO worker_registry (

    #[tokio::test]
    async fn backend_jobs_fence_results_project_ownership_and_bound_retries() {
-        let store = SqliteWorkspaceStore::in_memory_for_test().unwrap();
+        let store = SqliteWorkspaceStore::in_memory_fixture().unwrap();
        let workspace_id = "workspace-job";
        store
            .upsert_account(&AccountRecord {
@@ -0,0 +1,190 @@
+//! Ordinary store/API fixtures copy a verified empty schema into independent real DBs.
+//! Each case owns its connections and executors, with production SQLite settings.
+//! Additional connections within fresh API setup reuse its verified schema. Migration,
+//! fresh-creation, drift detection and persisted-case reopen tests use uncached constructors.
+
+use super::*;
+
+impl SqliteWorkspaceStore {
+    pub(crate) fn open_api_fixture(path: impl AsRef<Path>) -> Result<Self> {
+        let path = path.as_ref();
+        if path.exists() {
+            // Restart tests must reopen their persisted database, not reset it.
+            return Self::open_for_test(path);
+        }
+        Self::from_fixture_connection(Connection::open(path)?)
+    }
+
+    pub(crate) fn in_memory_fixture() -> Result<Self> {
+        Self::from_fixture_connection(Connection::open_in_memory()?)
+    }
+
+    // Only the fresh API fixture may use this after copying its verified template.
+    // Open a distinct connection without replacing the DB or sharing a transaction.
+    pub(crate) fn connect_prepared_fixture(path: &Path) -> Result<Self> {
+        let conn = Connection::open_with_flags(path, OpenFlags::SQLITE_OPEN_READ_WRITE)?;
+        configure_sqlite(&conn)?;
+        Ok(Self {
+            conn: Arc::new(Mutex::new(conn)),
+            db_executor: crate::db_executor::DbExecutor::new(
+                crate::db_executor::DbExecutorLimits::default(),
+            )?,
+        })
+    }
+
+    fn from_fixture_connection(mut conn: Connection) -> Result<Self> {
+        static TEMPLATE: std::sync::OnceLock<Mutex<Option<Connection>>> =
+            std::sync::OnceLock::new();
+        {
+            // Only initialization/copy is serialized, never a test's execution.
+            let mut template = TEMPLATE
+                .get_or_init(|| Mutex::new(None))
+                .lock()
+                .map_err(|_| Error::Store("API fixture template lock poisoned".into()))?;
+            if template.is_none() {
+                let source = Connection::open_in_memory()?;
+                prepare_connection(&source)?;
+                *template = Some(source);
+            }
+            Backup::new(template.as_ref().unwrap(), &mut conn)?.run_to_completion(
+                128,
+                Duration::from_millis(1),
+                None,
+            )?;
+        }
+        // Backup copies the already verified schema, not connection-local PRAGMAs.
+        // Existing DBs above still pass through full production startup checks.
+        configure_sqlite(&conn)?;
+        Ok(Self {
+            conn: Arc::new(Mutex::new(conn)),
+            db_executor: crate::db_executor::DbExecutor::new(
+                crate::db_executor::DbExecutorLimits::default(),
+            )?,
+        })
+    }
+}
+
+#[test]
+fn prepared_fixture_connections_observe_only_committed_writes_and_keep_foreign_keys() {
+    let temp = tempfile::tempdir().unwrap();
+    let path = temp.path().join("connections.db");
+    assert!(SqliteWorkspaceStore::connect_prepared_fixture(&path).is_err());
+    assert!(!path.exists());
+    let writer = SqliteWorkspaceStore::open_api_fixture(&path).unwrap();
+    let reader = SqliteWorkspaceStore::connect_prepared_fixture(&path).unwrap();
+    writer.with_conn(|conn| {
+        let tx = conn.unchecked_transaction()?;
+        tx.execute("INSERT INTO accounts(account_id,kind,handle,display_name,created_at,updated_at) VALUES('owner','user','owner','Owner','1','1')", [])?;
+        reader.with_conn(|other| {
+            assert!(other.is_autocommit());
+            assert_eq!(other.query_row("SELECT COUNT(*) FROM accounts", [], |row| row.get::<_, i64>(0))?, 0);
+            Ok(())
+        })?;
+        tx.commit()?;
+        Ok(())
+    }).unwrap();
+    reader.with_conn(|conn| {
+        assert_eq!(conn.query_row("SELECT COUNT(*) FROM accounts", [], |row| row.get::<_, i64>(0))?, 1);
+        assert_eq!(conn.query_row("PRAGMA journal_mode", [], |row| row.get::<_, String>(0))?, "wal");
+        assert!(conn.execute("INSERT INTO workspaces(workspace_id,owner_account_id,display_name,state,created_at,updated_at) VALUES('invalid','missing','Invalid','active','1','1')", []).is_err());
+        Ok(())
+    }).unwrap();
+}
+
+#[test]
+fn memory_fixture_copies_fresh_schema_and_isolates_data_and_ddl() {
+    fn schema(store: &SqliteWorkspaceStore) -> Vec<(String, String, Option<String>)> {
+        store
+            .with_conn(|conn| {
+                let mut statement =
+                    conn.prepare("SELECT type, name, sql FROM sqlite_schema ORDER BY type, name")?;
+                let rows = statement
+                    .query_map([], |row| Ok((row.get(0)?, row.get(1)?, row.get(2)?)))?
+                    .collect::<rusqlite::Result<Vec<_>>>()?;
+                Ok(rows)
+            })
+            .unwrap()
+    }
+    let fresh = SqliteWorkspaceStore::in_memory_for_test().unwrap();
+    let first = SqliteWorkspaceStore::in_memory_fixture().unwrap();
+    assert_eq!(schema(&first), schema(&fresh));
+    first.with_conn(|conn| {
+        assert_eq!(conn.query_row("PRAGMA foreign_keys", [], |row| row.get::<_, i64>(0))?, 1);
+        conn.execute_batch("INSERT INTO accounts(account_id,kind,handle,display_name,created_at,updated_at) VALUES('owner','user','owner','Owner','1','1'); DROP TRIGGER ticket_assignment_ticket_parent_tombstone;")?;
+        Ok(())
+    }).unwrap();
+    let second = SqliteWorkspaceStore::in_memory_fixture().unwrap();
+    assert_eq!(schema(&second), schema(&fresh));
+    second.with_conn(|conn| {
+        assert_eq!(conn.query_row("SELECT COUNT(*) FROM accounts", [], |row| row.get::<_, i64>(0))?, 0);
+        assert!(conn.execute("INSERT INTO workspaces(workspace_id,owner_account_id,display_name,state,created_at,updated_at) VALUES('invalid','missing','Invalid','active','1','1')", []).is_err());
+        Ok(())
+    }).unwrap();
+}
+
+#[test]
+fn api_fixture_reopen_rejects_schema_drift_instead_of_replacing_the_database() {
+    let temp = tempfile::tempdir().unwrap();
+    let path = temp.path().join("drift.db");
+    let store = SqliteWorkspaceStore::open_api_fixture(&path).unwrap();
+    store
+        .with_conn(|conn| {
+            conn.execute_batch("DROP TRIGGER ticket_assignment_ticket_parent_tombstone;")?;
+            Ok(())
+        })
+        .unwrap();
+    drop(store);
+    let error = SqliteWorkspaceStore::open_api_fixture(&path)
+        .err()
+        .expect("reopen must verify existing schema");
+    assert!(
+        error
+            .to_string()
+            .contains("ticket_assignment_ticket_parent_tombstone")
+    );
+    let conn = Connection::open(path).unwrap();
+    assert_eq!(conn.query_row("SELECT COUNT(*) FROM sqlite_schema WHERE name='ticket_assignment_ticket_parent_tombstone'", [], |row| row.get::<_, i64>(0)).unwrap(), 0);
+}
+
+#[test]
+fn api_fixture_databases_isolate_writes_and_reopen_persisted_rows() {
+    let temp = tempfile::tempdir().unwrap();
+    std::thread::scope(|scope| {
+        let handles: Vec<_> = ["first", "second"]
+            .into_iter()
+            .map(|name| {
+                let path = temp.path().join(format!("{name}.db"));
+                scope.spawn(move || {
+                    let store = SqliteWorkspaceStore::open_api_fixture(&path).unwrap();
+                    store.with_conn(|conn| {
+                        assert_eq!(conn.query_row("PRAGMA foreign_keys", [], |row| row.get::<_, i64>(0))?, 1);
+                        assert_eq!(conn.query_row("PRAGMA journal_mode", [], |row| row.get::<_, String>(0))?, "wal");
+                        conn.execute("INSERT INTO accounts(account_id,kind,handle,display_name,created_at,updated_at) VALUES('owner','user','owner',?1,'1','1')", [name])?;
+                        assert!(conn.execute("INSERT INTO workspaces(workspace_id,owner_account_id,display_name,state,created_at,updated_at) VALUES('invalid','missing','Invalid','active','1','1')", []).is_err());
+                        Ok(())
+                    }).unwrap();
+                    drop(store);
+                    let reopened = SqliteWorkspaceStore::open_api_fixture(&path).unwrap();
+                    reopened.with_conn(|conn| {
+                        assert_eq!(conn.query_row("SELECT display_name FROM accounts WHERE account_id='owner'", [], |row| row.get::<_, String>(0))?, name);
+                        Ok(())
+                    }).unwrap();
+                })
+            })
+            .collect();
+        for handle in handles {
+            handle.join().unwrap();
+        }
+    });
+    let pristine = SqliteWorkspaceStore::open_api_fixture(temp.path().join("pristine.db")).unwrap();
+    pristine
+        .with_conn(|conn| {
+            assert_eq!(
+                conn.query_row("SELECT COUNT(*) FROM accounts", [], |row| row
+                    .get::<_, i64>(0))?,
+                0
+            );
+            Ok(())
+        })
+        .unwrap();
+}
@@ -286,6 +286,94 @@ pub(crate) fn render_result(acceptance: &BackendJobResultAcceptance) -> Result<S
    Ok(content)
 }

+// Supplied model outputs exercise host validation/rendering, not LLM judgment.
+#[cfg(test)]
+pub(crate) mod test_support {
+    use super::*;
+
+    pub(crate) struct FakeTicketCheckerModel;
+
+    impl FakeTicketCheckerModel {
+        pub(crate) fn respond(request: &BackendJobRequest) -> Value {
+            let input = parse_input(&request.input).unwrap();
+            assert!(request.instruction.contains("writer_scope"));
+            assert!(request.instruction.contains("internal_inconsistency"));
+            assert!(request.instruction.contains("ambiguous_boundary"));
+            assert!(
+                request
+                    .instruction
+                    .contains("Production deployment requires approval")
+            );
+            assert!(request.instruction.contains("background, quotations"));
+            if input
+                .body
+                .contains("This time I only create the Ticket; I will not implement it.")
+                && !input.body.starts_with("Background bug example:")
+            {
+                serde_json::json!({"findings": [{
+                    "category": "writer_scope",
+                    "quote": "I will not implement it",
+                    "reason": "The active requirement records the writer's own implementation boundary.",
+                    "suggestion": "Remove the writer-specific action boundary."
+                }]})
+            } else if input.body.contains("The rollout region is undecided.")
+                && input.body.contains("The rollout region is us-east-1.")
+            {
+                serde_json::json!({"findings": [{
+                    "category": "internal_inconsistency",
+                    "quote": "The rollout region is undecided.",
+                    "reason": "The same active text also settles the rollout region as us-east-1.",
+                    "suggestion": "Choose either the unresolved or settled rollout-region statement."
+                }]})
+            } else if input.body == "Implementation stops after Ticket creation." {
+                serde_json::json!({"findings": [{
+                    "category": "ambiguous_boundary",
+                    "quote": "Implementation stops after Ticket creation.",
+                    "reason": "The text alone does not establish whether this is a delivery constraint or the writer's current action boundary.",
+                    "suggestion": "Confirm whether this limits the product workflow or only the current writer."
+                }]})
+            } else {
+                serde_json::json!({"findings": []})
+            }
+        }
+    }
+
+    pub(crate) struct Case {
+        pub(crate) name: &'static str,
+        pub(crate) body: &'static str,
+        pub(crate) advisory_quote: Option<&'static str>,
+    }
+    pub(crate) fn cases() -> Vec<Case> {
+        vec![
+            Case {
+                name: "writer-scope-positive",
+                body: "This time I only create the Ticket; I will not implement it.",
+                advisory_quote: Some("I will not implement it"),
+            },
+            Case {
+                name: "production-approval-negative",
+                body: "Production deployment requires approval.",
+                advisory_quote: None,
+            },
+            Case {
+                name: "quoted-background-negative",
+                body: "Background bug example: a generated Ticket once said “I will not implement it.” Do not reproduce that sentence in generated requirements.",
+                advisory_quote: None,
+            },
+            Case {
+                name: "unresolved-versus-settled-positive",
+                body: "The rollout region is undecided. The rollout region is us-east-1.",
+                advisory_quote: Some("The rollout region is undecided."),
+            },
+            Case {
+                name: "ambiguous-boundary-confirmation",
+                body: "Implementation stops after Ticket creation.",
+                advisory_quote: Some("Implementation stops after Ticket creation."),
+            },
+        ]
+    }
+}
+
 #[cfg(test)]
 mod tests {
    use super::*;
@@ -301,16 +389,144 @@ mod tests {
        })
    }

+    fn ticket_fixture() -> ticket::Ticket {
+        ticket::Ticket {
+            meta: ticket::TicketMeta {
+                id: "ticket-internal".into(),
+                resource_key: Some("T-42".into()),
+                slug: "check-this-content".into(),
+                title: "Check this content".into(),
+                status: ticket::ExtensibleTicketStatus::Open,
+                kind: "task".into(),
+                priority: "P2".into(),
+                labels: vec![],
+                created_at: None,
+                created_by: None,
+                updated_at: None,
+                assignee: None,
+                readiness: None,
+                risk_flags: vec![],
+                workflow_state: ticket::TicketState::Open,
+                workflow_state_explicit: true,
+                queued_by: None,
+                queued_at: None,
+                targets: vec![],
+                raw: Default::default(),
+            },
+            document: ticket::TicketDocument {
+                body: ticket::MarkdownText::new("Check the saved content."),
+                raw_frontmatter: Default::default(),
+            },
+            tags: vec![],
+            events: vec![],
+            artifacts: vec![],
+            relations: Default::default(),
+            resolution: None,
+            closure_operation_key: None,
+            current_closure: None,
+            case_history: vec![],
+            legacy_workflow_snapshot: None,
+        }
+    }
+
+    fn completed_acceptance(
+        request: BackendJobRequest,
+        result: Value,
+    ) -> BackendJobResultAcceptance {
+        use crate::backend_job::{
+            BackendJobAttemptRecord, BackendJobAttemptState, BackendJobRecord, BackendJobState,
+        };
+        let digest = crate::backend_job::result_digest(&result, request.limits.max_result_bytes)
+            .unwrap()
+            .0;
+        let attempt = BackendJobAttemptRecord {
+            workspace_id: "checker-unit".into(),
+            job_id: request.job_id.clone(),
+            attempt_id: "checker-attempt".into(),
+            attempt: 1,
+            input_digest: request.input_digest().unwrap(),
+            state: BackendJobAttemptState::Completed,
+            worker: Some(RuntimeWorkerRef::new("runtime", "checker")),
+            runtime_run_id: Some("run".into()),
+            dispatched_at: Some("1".into()),
+            deadline_at: "3".into(),
+            result: Some(result.clone()),
+            result_digest: Some(digest.clone()),
+            failure_category: None,
+            failure_detail: None,
+            worker_cleanup_state: None,
+            worker_cleanup_failure_category: None,
+            worker_cleanup_failure_detail: None,
+            worker_cleanup_updated_at: None,
+            worker_cleanup_completed_at: None,
+            created_at: "1".into(),
+            updated_at: "2".into(),
+            completed_at: Some("2".into()),
+        };
+        BackendJobResultAcceptance {
+            job: BackendJobRecord {
+                workspace_id: "checker-unit".into(),
+                intent_fingerprint: request.fingerprint().unwrap(),
+                request,
+                state: BackendJobState::Completed,
+                current_attempt: 1,
+                result: Some(result),
+                result_digest: Some(digest),
+                failure_category: None,
+                failure_detail: None,
+                created_at: "1".into(),
+                updated_at: "2".into(),
+                completed_at: Some("2".into()),
+            },
+            attempt,
+            replayed: false,
+        }
+    }
+
+    #[test]
+    fn supplied_model_classifications_validate_and_render_advisories_or_no_findings() {
+        let instruction = worker::PromptCatalog::builtins_only()
+            .unwrap()
+            .ticket_item_checker()
+            .unwrap();
+        for case in test_support::cases() {
+            let mut ticket = ticket_fixture();
+            ticket.meta.title = format!("Boundary case: {}", case.name);
+            ticket.document.body = ticket::MarkdownText::new(case.body);
+            let request = request(
+                &ticket,
+                TicketItemCheckEdit::Create,
+                RuntimeWorkerRef::new("runtime", "source"),
+                instruction.clone(),
+            )
+            .unwrap();
+            let result = test_support::FakeTicketCheckerModel::respond(&request);
+            let checked = validate_result(&request.input, &result).unwrap();
+            let acceptance = completed_acceptance(request, result);
+            match (
+                case.advisory_quote,
+                result_facts(&acceptance, &ticket).unwrap(),
+            ) {
+                (Some(quote), TicketItemCheckFacts::Findings(advisory)) => {
+                    assert_eq!(checked.findings.len(), 1, "{}", case.name);
+                    assert!(
+                        advisory.contains("[Ticket item checker advisory]"),
+                        "{}",
+                        case.name
+                    );
+                    assert!(advisory.contains(quote), "{}", case.name);
+                }
+                (None, TicketItemCheckFacts::NoFindings) => {
+                    assert!(checked.findings.is_empty(), "{}", case.name);
+                }
+                (_, actual) => panic!("{}: unexpected classification {actual:?}", case.name),
+            }
+        }
+    }
+
    #[test]
    fn checker_job_identity_reuses_exact_intent_but_separates_edits_and_sources() {
-        use ticket::TicketBackend;
-
-        let dir = tempfile::tempdir().unwrap();
-        let backend =
-            ticket::SqliteTicketBackend::open(dir.path().join("tickets.db"), "space").unwrap();
-        let (_, ticket) = backend
-            .create_with_snapshot(ticket::NewTicket::new("Check this content"))
-            .unwrap();
+        let ticket = ticket_fixture();
        let source = RuntimeWorkerRef {
            runtime_id: "runtime".into(),
            worker_id: "source".into(),
@@ -939,7 +939,7 @@ mod tests {
    }

    async fn seeded_store() -> (SqliteWorkspaceStore, WorkdirRegistryRecord) {
-        let store = SqliteWorkspaceStore::in_memory_for_test().unwrap();
+        let store = SqliteWorkspaceStore::in_memory_fixture().unwrap();
        store
            .upsert_account(&AccountRecord {
                account_id: "account-a".to_string(),
@@ -302,7 +302,7 @@ mod tests {

    #[tokio::test]
    async fn create_is_atomic_and_exact_retries_converge() {
-        let store = Arc::new(SqliteWorkspaceStore::in_memory_for_test().unwrap());
+        let store = Arc::new(SqliteWorkspaceStore::in_memory_fixture().unwrap());
        let service = WorkspaceCatalogService::new(
            store.clone(),
            Arc::new(
@@ -356,7 +356,7 @@ mod tests {

    #[test]
    fn create_rejects_noncanonical_repository_keys_without_persisting_a_workspace() {
-        let store = Arc::new(SqliteWorkspaceStore::in_memory_for_test().unwrap());
+        let store = Arc::new(SqliteWorkspaceStore::in_memory_fixture().unwrap());
        let service = WorkspaceCatalogService::new(
            store.clone(),
            Arc::new(
@@ -517,7 +517,7 @@ mod tests {

    #[tokio::test]
    async fn idempotency_key_reuse_with_different_payload_is_rejected() {
-        let store = Arc::new(SqliteWorkspaceStore::in_memory_for_test().unwrap());
+        let store = Arc::new(SqliteWorkspaceStore::in_memory_fixture().unwrap());
        let owner_account_id = owner_account(store.as_ref());
        let service = WorkspaceCatalogService::new(
            store,
@@ -549,7 +549,7 @@ mod tests {

    #[test]
    fn repository_free_create_initializes_authority_and_concurrent_retries_converge() {
-        let store = Arc::new(SqliteWorkspaceStore::in_memory_for_test().unwrap());
+        let store = Arc::new(SqliteWorkspaceStore::in_memory_fixture().unwrap());
        let owner = owner_account(store.as_ref());
        let service = WorkspaceCatalogService::new(
            store.clone(),
@@ -628,7 +628,7 @@ mod tests {

    #[test]
    fn replay_reads_current_repository_at_initial_key_and_never_recreates_it() {
-        let store = Arc::new(SqliteWorkspaceStore::in_memory_for_test().unwrap());
+        let store = Arc::new(SqliteWorkspaceStore::in_memory_fixture().unwrap());
        let owner = owner_account(store.as_ref());
        let service = WorkspaceCatalogService::new(
            store.clone(),
@@ -756,7 +756,7 @@ mod tests {

    #[test]
    fn create_rejects_non_user_account_owners() {
-        let store = Arc::new(SqliteWorkspaceStore::in_memory_for_test().unwrap());
+        let store = Arc::new(SqliteWorkspaceStore::in_memory_fixture().unwrap());
        store
            .upsert_account(&AccountRecord {
                account_id: "organization-owner".to_string(),
@@ -794,7 +794,7 @@ mod tests {

    #[test]
    fn catalog_list_is_scoped_to_the_required_owner_account() {
-        let store = Arc::new(SqliteWorkspaceStore::in_memory_for_test().unwrap());
+        let store = Arc::new(SqliteWorkspaceStore::in_memory_fixture().unwrap());
        let owner_a = owner_account(store.as_ref());
        let owner_b = "account-owner-b".to_string();
        store
@@ -862,7 +862,7 @@ mod tests {

    #[test]
    fn remote_repository_creation_persists_typed_source_without_auth_metadata() {
-        let store = Arc::new(SqliteWorkspaceStore::in_memory_for_test().unwrap());
+        let store = Arc::new(SqliteWorkspaceStore::in_memory_fixture().unwrap());
        let owner_account_id = owner_account(store.as_ref());
        let service = WorkspaceCatalogService::new(
            store.clone(),
@@ -747,7 +747,7 @@ mod tests {
            WorkspaceRecord,
        };
        let store = std::sync::Arc::new(
-            SqliteWorkspaceStore::in_memory_for_test()
+            SqliteWorkspaceStore::in_memory_fixture()
                .unwrap()
                .with_db_executor(crate::db_executor::DbExecutor::new(Default::default()).unwrap()),
        );