diff --git a/.changeset/fn-8258-pg-quarantine.md b/.changeset/fn-8258-pg-quarantine.md
new file mode 100644
index 0000000000..8c907a7a77
--- /dev/null
+++ b/.changeset/fn-8258-pg-quarantine.md
@@ -0,0 +1,7 @@
+---
+"@runfusion/fusion": patch
+---
+
+summary: Preserve archived shared-branch landing proof during PostgreSQL promotion checks.
+category: fix
+dev: Completes PostgreSQL quarantine rescues and prevents archived landed members from blocking branch-group promotion.
diff --git a/packages/core/src/task-store/archive-lifecycle-2.ts b/packages/core/src/task-store/archive-lifecycle-2.ts
index 132af7af66..60ccc2b72b 100644
--- a/packages/core/src/task-store/archive-lifecycle-2.ts
+++ b/packages/core/src/task-store/archive-lifecycle-2.ts
@@ -96,6 +96,7 @@ export async function taskToArchiveEntryImpl(store: TaskStore, task: Task, archi
       missionId: task.missionId,
       sliceId: task.sliceId,
       assigneeUserId: task.assigneeUserId,
+      mergeDetails: task.mergeDetails,
     };
   }
 
diff --git a/packages/core/src/task-store/remaining-ops-6.ts b/packages/core/src/task-store/remaining-ops-6.ts
index 550ed51a64..c5aba1636d 100644
--- a/packages/core/src/task-store/remaining-ops-6.ts
+++ b/packages/core/src/task-store/remaining-ops-6.ts
@@ -100,8 +100,14 @@ export async function listBranchGroupsImpl(store: TaskStore, options?: { status?
     return (rows as BranchGroupRow[]).map((row) => store.rowToBranchGroup(row));
 }
 
+/*
+FNXC:BranchGroupCompletion 2026-07-18-01:55:
+Archived shared-branch members remain part of promotion completion: an unlanded archived
+member blocks promotion, while an archived member with persisted landing proof permits it.
+The PostgreSQL path must therefore load archived tasks before applying group membership.
+*/
 export async function listTasksByBranchGroupImpl(store: TaskStore, groupId: string): Promise<Task[]> {
-    const tasks = await store.listTasks({ includeArchived: false, slim: true });
+    const tasks = await store.listTasks({ includeArchived: true, slim: false });
     // Membership filter (incl. legacy synthetic-groupId fallback) is shared with
     // the dashboard list route via `filterTasksByBranchGroup` so semantics can't
     // drift between the two call sites (Fix #8/#9).
diff --git a/packages/core/src/task-store/serialization.ts b/packages/core/src/task-store/serialization.ts
index c1d9132a40..85ae29f476 100644
--- a/packages/core/src/task-store/serialization.ts
+++ b/packages/core/src/task-store/serialization.ts
@@ -374,6 +374,7 @@ export function archiveEntryToTask(
     missionId: entry.missionId,
     sliceId: entry.sliceId,
     assigneeUserId: entry.assigneeUserId,
+    mergeDetails: slim ? undefined : entry.mergeDetails,
   };
 }
 
diff --git a/packages/engine/src/__tests__/agent-tools-intake-column.test.ts b/packages/engine/src/__tests__/agent-tools-intake-column.test.ts
index b7233b7066..57499a46d3 100644
--- a/packages/engine/src/__tests__/agent-tools-intake-column.test.ts
+++ b/packages/engine/src/__tests__/agent-tools-intake-column.test.ts
@@ -1,10 +1,8 @@
-import { afterEach, beforeEach, describe, expect, it } from "vitest";
-import { mkdtempSync } from "node:fs";
+import { afterEach, beforeEach, expect, it } from "vitest";
 import { readFile } from "node:fs/promises";
-import { rm } from "node:fs/promises";
 import { join } from "node:path";
-import { tmpdir } from "node:os";
-import { TaskStore, type WorkflowIr } from "@fusion/core";
+import { type TaskStore, type WorkflowIr } from "@fusion/core";
+import { createTaskStoreForTest, pgDescribe, type PgTestHarness } from "../../../core/src/__test-utils__/pg-test-harness.js";
 import { createTaskCreateTool } from "../agent-tools.js";
 
 /*
@@ -15,22 +13,18 @@ non-triage `intake`-trait column (e.g. "Inbox") must capture new cards there, in
 (bootstrap-stub PROMPT.md, no Planner spec generation), while the default builtin:coding
 workflow keeps landing cards in "triage" byte-identically.
 */
-describe("createTaskCreateTool intake-column wiring", () => {
-  let rootDir: string;
-  let globalDir: string;
+/* FNXC:PgMigrationQuarantine 2026-07-17-18:15: FN-8258 keeps intake-column behavior on a real PostgreSQL-backed TaskStore, replacing removed SQLite inMemoryDb setup. */
+pgDescribe("createTaskCreateTool intake-column wiring", () => {
+  let harness: PgTestHarness;
   let store: TaskStore;
 
   beforeEach(async () => {
-    rootDir = mkdtempSync(join(tmpdir(), "kb-engine-agent-tools-intake-"));
-    globalDir = mkdtempSync(join(tmpdir(), "kb-engine-agent-tools-intake-global-"));
-    store = new TaskStore(rootDir, globalDir, { inMemoryDb: true });
-    await store.init();
+    harness = await createTaskStoreForTest({ prefix: "fusion_agent_tools_intake" });
+    store = harness.store;
   });
 
   afterEach(async () => {
-    store.close();
-    await rm(rootDir, { recursive: true, force: true });
-    await rm(globalDir, { recursive: true, force: true });
+    await harness?.teardown();
   });
 
   function inboxWorkflowIr(name: string): WorkflowIr {
@@ -132,7 +126,7 @@ describe("createTaskCreateTool intake-column wiring", () => {
 
     expect((result as { isError?: boolean }).isError).toBeFalsy();
     const taskId = (result.details as { taskId: string }).taskId;
-    const prompt = await readFile(join(rootDir, ".fusion", "tasks", taskId, "PROMPT.md"), "utf-8");
+    const prompt = await readFile(join(harness.rootDir, ".fusion", "tasks", taskId, "PROMPT.md"), "utf-8");
     expect(prompt).toBe(`# ${taskId}\n\nInbox bootstrap prompt task\n`);
   });
 });
diff --git a/packages/engine/src/__tests__/agent-workflow-tools-exposure.test.ts b/packages/engine/src/__tests__/agent-workflow-tools-exposure.test.ts
index dbb1228287..eb280eb90c 100644
--- a/packages/engine/src/__tests__/agent-workflow-tools-exposure.test.ts
+++ b/packages/engine/src/__tests__/agent-workflow-tools-exposure.test.ts
@@ -1,7 +1,4 @@
 import { describe, it, expect } from "vitest";
-import { mkdtemp, rm } from "node:fs/promises";
-import { join } from "node:path";
-import { tmpdir } from "node:os";
 import {
   createWorkflowAuthoringTools,
   createWorkflowListTool,
@@ -13,7 +10,8 @@ import {
   createWorkflowDeleteTool,
 } from "../index.js";
 import { createWorkflowSettingsTool } from "../agent-tools.js";
-import { parseWorkflowIr, TaskStore } from "@fusion/core";
+import { parseWorkflowIr, type TaskStore } from "@fusion/core";
+import { createTaskStoreForTest, pgDescribe } from "../../../core/src/__test-utils__/pg-test-harness.js";
 
 /**
  * U11 / R12 drift guard (engine half): the workflow-authoring tool surface that
@@ -69,7 +67,7 @@ describe("workflow tool exposure (engine factories)", () => {
  * prompt-injectable agent lane. The executor lane omits the option (project-
  * owner escape hatch) and the flags pass through unchanged.
  */
-describe("fn_workflow_validate dry-run", () => {
+pgDescribe("fn_workflow_validate dry-run", () => {
   const run = (tool: { execute: (...a: any[]) => Promise<any> }, params: unknown) =>
     tool.execute("call-1", params, undefined, undefined, undefined) as Promise<{
       isError?: boolean; details: any; content: { type: string; text?: string }[];
@@ -85,15 +83,13 @@ describe("fn_workflow_validate dry-run", () => {
     edges: [{ from: "start", to: "end", condition: "success" as const }],
   });
 
+  /* FNXC:PgMigrationQuarantine 2026-07-17-18:15: validation must use the production PostgreSQL store boundary rather than removed SQLite constructor paths. */
   async function withStore<T>(fn: (store: TaskStore) => Promise<T>): Promise<T> {
-    const dir = await mkdtemp(join(tmpdir(), "workflow-validate-tool-"));
-    const store = new TaskStore(dir);
-    await store.init();
+    const harness = await createTaskStoreForTest({ prefix: "fusion_workflow_validate" });
     try {
-      return await fn(store);
+      return await fn(harness.store);
     } finally {
-      await store.close?.().catch(() => {});
-      await rm(dir, { recursive: true, force: true });
+      await harness.teardown();
     }
   }
 
diff --git a/packages/engine/src/__tests__/executor-task-done-invariant.test.ts b/packages/engine/src/__tests__/executor-task-done-invariant.test.ts
index bfd369ccee..a8b2cf13ff 100644
--- a/packages/engine/src/__tests__/executor-task-done-invariant.test.ts
+++ b/packages/engine/src/__tests__/executor-task-done-invariant.test.ts
@@ -1,12 +1,11 @@
 import { beforeEach, afterEach, describe, expect, it, vi } from "vitest";
-import { mkdtempSync, mkdirSync } from "node:fs";
-import { rm } from "node:fs/promises";
+import { mkdirSync } from "node:fs";
 import { join } from "node:path";
-import { tmpdir } from "node:os";
 import "./executor-test-helpers.js";
 import { TaskExecutor } from "../executor.js";
 import * as worktreePool from "../worktree-pool.js";
-import { TaskStore } from "@fusion/core";
+import { type TaskStore } from "@fusion/core";
+import { createTaskStoreForTest, pgDescribe, type PgTestHarness } from "../../../core/src/__test-utils__/pg-test-harness.js";
 import { createMockStore, mockedCreateFnAgent, mockedExec, mockedExecSync, resetExecutorMocks } from "./executor-test-helpers.js";
 
 const fn416Prompt = `# Task: FN-416 - Assign ready implementation task to active owner
@@ -766,23 +765,23 @@ Assign or route exactly one ready implementation task to an eligible active owne
   });
 });
 
-describe("FN-5241 executor handoff auditing", () => {
+/* FNXC:PgMigrationQuarantine 2026-07-18-01:20: FN-8258 runs handoff-audit invariants against the PostgreSQL TaskStore and its async audit boundary, replacing the removed SQLite constructor. */
+pgDescribe("FN-5241 executor handoff auditing", () => {
   let rootDir: string;
-  let globalDir: string;
+  let harness: PgTestHarness;
   let store: TaskStore;
 
   beforeEach(async () => {
-    rootDir = mkdtempSync(join(tmpdir(), "fn-5241-executor-"));
-    globalDir = join(rootDir, ".fusion-global");
-    store = new TaskStore(rootDir, globalDir);
-    await store.init();
+    // Reset the executor subprocess mock before PG setup so the harness can pass psql through.
     resetExecutorMocks();
+    harness = await createTaskStoreForTest({ prefix: "fusion_executor_handoff_audit" });
+    rootDir = harness.rootDir;
+    store = harness.store;
     vi.spyOn(worktreePool, "isUsableTaskWorktree").mockResolvedValue(true);
   });
 
   afterEach(async () => {
-    store.close();
-    await rm(rootDir, { recursive: true, force: true, maxRetries: 5, retryDelay: 50 });
+    await harness?.teardown();
   });
 
   async function createExecutorTask(taskDoneRetryCount = 0) {
@@ -869,11 +868,11 @@ describe("FN-5241 executor handoff auditing", () => {
     // Forensic intent preserved via the mechanism that actually fires now: the merge boundary records a
     // task:move into in-review (the review-seam task:handoff("workflow-graph-review") event and the
     // review-seam merge-queue enqueue no longer occur on this path).
-    const moveToReview = store
-      .getRunAuditEvents({ taskId: task.id, mutationType: "task:move", limit: 20 })
+    const moveToReview = (await store
+      .getRunAuditEventsAsync({ taskId: task.id, mutationType: "task:move", limit: 20 }))
       .find((event) => (event.metadata as { to?: string })?.to === "in-review");
     expect(moveToReview).toBeDefined();
-    expect(store.getRunAuditEvents({ taskId: task.id, mutationType: "task:handoff", limit: 10 })).toHaveLength(0);
+    expect(await store.getRunAuditEventsAsync({ taskId: task.id, mutationType: "task:handoff", limit: 10 })).toHaveLength(0);
   });
 
   it("fails a no-fn_task_done retry-budget-exhausted run in place without moving to in-review", async () => {
@@ -906,7 +905,7 @@ describe("FN-5241 executor handoff auditing", () => {
     // FN-5241 review-seam handoff auditing (task:handoff "workflow-graph-review" /
     // "max-task-done-retries-exhausted") + merge-queue enqueue are superseded — none of them fire here.
     expect(latest?.column).not.toBe("in-review");
-    expect(store.getRunAuditEvents({ taskId: task.id, mutationType: "task:handoff", limit: 10 })).toHaveLength(0);
-    expect(store.peekMergeQueue()).toEqual([]);
+    expect(await store.getRunAuditEventsAsync({ taskId: task.id, mutationType: "task:handoff", limit: 10 })).toHaveLength(0);
+    expect(await store.peekMergeQueue()).toEqual([]);
   });
 });
diff --git a/packages/engine/src/__tests__/executor-test-helpers.ts b/packages/engine/src/__tests__/executor-test-helpers.ts
index cb3d61a483..bac16c91b1 100644
--- a/packages/engine/src/__tests__/executor-test-helpers.ts
+++ b/packages/engine/src/__tests__/executor-test-helpers.ts
@@ -190,6 +190,7 @@ vi.mock("../worktree-stale-registration.js", async () => {
 vi.mock("node:child_process", async () => {
   const { promisify } = await import("node:util");
   const { EventEmitter } = await import("node:events");
+  const actual = await vi.importActual<typeof import("node:child_process")>("node:child_process");
   const execSyncFn = vi.fn();
   const spawnFn = vi.fn((cmd: string, opts?: any) => {
     const child = new EventEmitter() as any;
@@ -220,6 +221,12 @@ vi.mock("node:child_process", async () => {
   });
 
   const execFn: any = vi.fn((cmd: string, opts: any, cb: any) => {
+    /*
+    FNXC:PgMigrationQuarantine 2026-07-18-01:30:
+    FN-8258's PG-backed executor audit suite shares this helper. Let its harness run
+    psql for isolated fixture DDL while retaining mocked executor subprocess commands.
+    */
+    if (/^psql\s/.test(cmd.trim())) return actual.exec(cmd, opts as any, cb as any);
     const callback = typeof opts === "function" ? opts : cb;
     const forwardedOpts = typeof opts === "function" ? undefined : opts;
     try {
diff --git a/packages/engine/src/__tests__/group-merge-coordinator.test.ts b/packages/engine/src/__tests__/group-merge-coordinator.test.ts
index 4cc30c1ddc..c6e74238dd 100644
--- a/packages/engine/src/__tests__/group-merge-coordinator.test.ts
+++ b/packages/engine/src/__tests__/group-merge-coordinator.test.ts
@@ -5,7 +5,8 @@ import { join } from "node:path";
 import { tmpdir } from "node:os";
 
 import { describe, expect, it, afterEach, beforeEach } from "vitest";
-import { TaskStore } from "@fusion/core";
+import { type TaskStore } from "@fusion/core";
+import { createTaskStoreForTest, pgDescribe, type PgTestHarness } from "../../../core/src/__test-utils__/pg-test-harness.js";
 import {
   evaluateBranchGroupCompletion,
   evaluateBranchGroupPromotion,
@@ -392,33 +393,32 @@ describe("promoteBranchGroup", () => {
  * `promoteBranchGroup` exercises the actual `listTasksByBranchGroup` membership scan that
  * previously silently dropped an archived-but-unlanded member from `total`.
  */
-describe("promoteBranchGroup with a real TaskStore (FN-7534 archived-member regression)", () => {
-  function makeTmpDir(): string {
-    return mkdtempSync(join(tmpdir(), "fusion-branch-group-archive-"));
-  }
-
+/*
+FNXC:PgMigrationQuarantine 2026-07-18-01:50:
+FN-8258 exercises archived shared-branch members through the PostgreSQL TaskStore, including
+awaited branch-group writes, instead of the removed SQLite constructor path.
+*/
+pgDescribe("promoteBranchGroup with a real TaskStore (FN-7534 archived-member regression)", () => {
   let rootDir: string;
-  let storeRootDir: string;
-  let globalDir: string;
+  let harness: PgTestHarness;
   let store: TaskStore;
 
   beforeEach(async () => {
     rootDir = makeRepo();
-    storeRootDir = makeTmpDir();
-    globalDir = join(storeRootDir, ".fusion-global");
-    store = new TaskStore(storeRootDir, globalDir);
-    await store.init();
+    harness = await createTaskStoreForTest({ prefix: "fusion_branch_group_archive" });
+    store = harness.store;
   });
 
-  afterEach(() => {
-    store.close();
+  afterEach(async () => {
+    await harness?.teardown();
   });
 
   it("returns reason: incomplete when an archived member never landed onto the group branch", async () => {
-    const group = store.createBranchGroup({
+    const group = await store.createBranchGroup({
       sourceType: "planning",
       sourceId: "PS-archived-gate",
       branchName: "fusion/groups/archived-gate",
+      autoMerge: true,
     });
 
     const landedTask = await store.createTask({ description: "landed member" });
@@ -447,7 +447,7 @@ describe("promoteBranchGroup with a real TaskStore (FN-7534 archived-member regr
   });
 
   it("still promotes when the only archived member had already landed before archival", async () => {
-    const group = store.createBranchGroup({
+    const group = await store.createBranchGroup({
       sourceType: "planning",
       sourceId: "PS-archived-landed-gate",
       branchName: "fusion/groups/archived-landed-gate",
@@ -472,6 +472,17 @@ describe("promoteBranchGroup with a real TaskStore (FN-7534 archived-member regr
     await store.moveTask(task.id, "done");
     await store.archiveTask(task.id);
 
+    // The completion invariant includes archived members and their persisted landing proof.
+    expect(await store.listTasksByBranchGroup(group.id)).toEqual([
+      expect.objectContaining({
+        id: task.id,
+        mergeDetails: expect.objectContaining({
+          mergeConfirmed: true,
+          mergeTargetBranch: group.branchName,
+        }),
+      }),
+    ]);
+
     const result = await promoteBranchGroup({
       rootDir,
       groupId: group.id,
diff --git a/packages/engine/src/__tests__/hybrid-executor-multi-node-routing.test.ts b/packages/engine/src/__tests__/hybrid-executor-multi-node-routing.test.ts
index 3eb7624d71..038a1de57e 100644
--- a/packages/engine/src/__tests__/hybrid-executor-multi-node-routing.test.ts
+++ b/packages/engine/src/__tests__/hybrid-executor-multi-node-routing.test.ts
@@ -128,6 +128,11 @@ describe("HybridExecutor multi-node routing", () => {
       await central.updateProject(projectA.id, { status: "active" });
       await central.updateProject(projectB.id, { status: "initializing" });
 
+      // FNXC:PgMigrationQuarantine 2026-07-18-01:45: central node rows persist across test
+      // instances, so isolate the local-only gate input from a previous test's remote registration.
+      vi.spyOn(central, "listNodes").mockResolvedValueOnce([{ id: "local-only", type: "local" }] as any);
+      vi.spyOn(central, "listProjects").mockResolvedValue([projectA, projectB] as any);
+
       // Gate intentionally OFF: ProjectEngineManager handles local
       // multi-project; running HybridExecutor here duplicates InProcessRuntime
       // creation and adds ~7s to cold start.
diff --git a/packages/engine/src/__tests__/mission-factory-parity.integration.test.ts b/packages/engine/src/__tests__/mission-factory-parity.integration.test.ts
index edefc57b4e..6224115b5b 100644
--- a/packages/engine/src/__tests__/mission-factory-parity.integration.test.ts
+++ b/packages/engine/src/__tests__/mission-factory-parity.integration.test.ts
@@ -604,7 +604,7 @@ describe("MissionFactory Parity: Engine Scheduler/Autopilot", () => {
       missionStore.addMission(mission);
 
       await autopilot.watchMission(mission.id);
-      autopilot.unwatchMission(mission.id);
+      await autopilot.unwatchMission(mission.id);
 
       expect(missionStore.updateMission).toHaveBeenCalledWith("M-TEST1", {
         autopilotState: "inactive",
diff --git a/packages/engine/src/__tests__/routine-runner.test.ts b/packages/engine/src/__tests__/routine-runner.test.ts
index 2034c19cc2..3bf03e5ad8 100644
--- a/packages/engine/src/__tests__/routine-runner.test.ts
+++ b/packages/engine/src/__tests__/routine-runner.test.ts
@@ -13,22 +13,28 @@ import { mkdtempSync, writeFileSync } from "node:fs";
 import { mkdir, rm } from "node:fs/promises";
 import { tmpdir } from "node:os";
 import { join } from "node:path";
-import { spawnSync } from "node:child_process";
+const backupCommandState = vi.hoisted(() => ({
+  result: { success: true, output: "Backup created" },
+  error: null as Error | null,
+}));
 
-/**
- * Write a real SQLite database file so the production backup path's `PRAGMA quick_check`
- * verification passes (mirrors packages/core/src/__tests__/backup.test.ts's fixture helper).
- * Falls back to a placeholder file when the `sqlite3` CLI is unavailable — in that case
- * verification also no-ops so the backup still succeeds.
- */
-function writeTestDb(path: string): void {
-  const result = spawnSync("sqlite3", [path, "CREATE TABLE IF NOT EXISTS t(x); INSERT INTO t VALUES (1);"], {
-    encoding: "utf-8",
-  });
-  if (result.error || result.status !== 0) {
-    writeFileSync(path, "dummy database content");
-  }
-}
+vi.mock("@fusion/core", async (importOriginal) => {
+  const actual = await importOriginal<typeof import("@fusion/core")>();
+  return {
+    ...actual,
+    runBackupCommand: vi.fn(async () => {
+      if (backupCommandState.error) throw backupCommandState.error;
+      return backupCommandState.result;
+    }),
+  };
+});
+
+/*
+FNXC:PgMigrationQuarantine 2026-07-18-01:40:
+FN-8258 keeps RoutineRunner's cron/manual delegation assertions while replacing the removed
+SQLite-file fixture with the async PostgreSQL backup command boundary. Backup implementation
+is covered in core; this suite verifies routine dispatch, result persistence, and live output.
+*/
 
 // Default settings inline to avoid @fusion/core build dependency during tests
 const DEFAULT_SETTINGS: Settings = {
@@ -134,6 +140,8 @@ function createMockAgentStore(): AgentStore {
 function createMockTaskStore(overrides: { fusionDir?: string; settings?: Partial<Settings> } = {}): TaskStore {
   return {
     getFusionDir: vi.fn().mockReturnValue(overrides.fusionDir ?? "/tmp/.fusion"),
+    // FNXC:PgMigrationQuarantine 2026-07-18-01:35: backup routines resolve PostgreSQL settings through this async-era TaskStore accessor, so the fake must mirror the production contract.
+    getGlobalSettingsDir: vi.fn().mockReturnValue(overrides.fusionDir ?? "/tmp/.fusion"),
     getSettings: vi.fn().mockResolvedValue({ ...DEFAULT_SETTINGS, ...overrides.settings }),
     on: vi.fn(),
     off: vi.fn(),
@@ -167,6 +175,11 @@ function createRoutineRunner(options?: Partial<RoutineRunnerOptions>): RoutineRu
 }
 
 describe("RoutineRunner", () => {
+  beforeEach(() => {
+    backupCommandState.result = { success: true, output: "Backup created" };
+    backupCommandState.error = null;
+  });
+
   describe("executeRoutine", () => {
     it("successfully executes a routine with trigger type 'cron'", async () => {
       const routine = createMockRoutine({ id: "routine-1", name: "Test Routine" });
@@ -273,13 +286,14 @@ describe("RoutineRunner", () => {
         routineStore,
         taskStore: createMockTaskStore({ fusionDir }),
       });
+      backupCommandState.error = new Error("backup command unavailable");
 
       try {
         const result = await runner.executeRoutine("routine-backup-missing-db", "cron");
 
         expect(result.success).toBe(false);
-        expect(result.error).toContain("project DB");
-        expect(result.error).toContain(`source: ${join(fusionDir, "fusion.db")}`);
+        expect(result.error).toContain("project PostgreSQL");
+        expect(result.error).toContain(`project state: ${fusionDir}`);
         expect(result.error).toContain("cause:");
         expect(result.error).not.toBe("");
         expect(routineStore.completeRoutineExecution).toHaveBeenCalledWith(
@@ -287,7 +301,7 @@ describe("RoutineRunner", () => {
           expect.objectContaining({
             success: false,
             error: result.error,
-            output: expect.stringContaining("project DB"),
+            output: "",
           }),
         );
       } finally {
@@ -446,7 +460,7 @@ describe("RoutineRunner", () => {
       const tempDir = mkdtempSync(join(tmpdir(), "routine-backup-parity-"));
       const fusionDir = join(tempDir, ".fusion");
       await mkdir(fusionDir, { recursive: true });
-      writeTestDb(join(fusionDir, "fusion.db"));
+      writeFileSync(join(fusionDir, "postgres-backed-fixture"), "routine backup dispatch fixture");
 
       try {
         for (const triggerType of ["cron", "api"] as const) {
@@ -477,7 +491,7 @@ describe("RoutineRunner", () => {
       const tempDir = mkdtempSync(join(tmpdir(), "routine-backup-live-"));
       const fusionDir = join(tempDir, ".fusion");
       await mkdir(fusionDir, { recursive: true });
-      writeTestDb(join(fusionDir, "fusion.db"));
+      writeFileSync(join(fusionDir, "postgres-backed-fixture"), "routine backup dispatch fixture");
 
       try {
         const routine = createMockRoutine({
diff --git a/packages/engine/src/__tests__/self-healing-meta-archive-guards.test.ts b/packages/engine/src/__tests__/self-healing-meta-archive-guards.test.ts
index b1b11be764..f01057e855 100644
--- a/packages/engine/src/__tests__/self-healing-meta-archive-guards.test.ts
+++ b/packages/engine/src/__tests__/self-healing-meta-archive-guards.test.ts
@@ -51,7 +51,7 @@ const canRun = hasGit && hasPg;
       const archived = await fixture.selfHeal.autoArchiveResolvedMetaTasks();
       expect(archived).toBe(0);
       expect((await fixture.store.getTask(meta.id))?.column).not.toBe("archived");
-      const events = fixture.store.getRunAuditEvents({ limit: 200 }).filter((e) => e.mutationType === "task:auto-archive-meta-resolved-skipped");
+      const events = (await fixture.store.getRunAuditEventsAsync({ limit: 200 })).filter((e) => e.mutationType === "task:auto-archive-meta-resolved-skipped");
       expect(events).toHaveLength(1);
       expect((events[0]?.metadata as any)?.blockedBy).toEqual(expect.arrayContaining(["branch-has-unique-commits"]));
     } finally {
@@ -65,7 +65,7 @@ const canRun = hasGit && hasPg;
     try {
       const archived = await fixture.selfHeal.autoArchiveResolvedMetaTasks();
       expect(archived).toBe(0);
-      const event = fixture.store.getRunAuditEvents({ limit: 200 }).find((e) => e.mutationType === "task:auto-archive-meta-resolved-skipped");
+      const event = (await fixture.store.getRunAuditEventsAsync({ limit: 200 })).find((e) => e.mutationType === "task:auto-archive-meta-resolved-skipped");
       expect((event?.metadata as any)?.blockedBy).toEqual(expect.arrayContaining(["recent-executor-activity"]));
     } finally {
       await fixture.cleanup();
@@ -77,7 +77,7 @@ const canRun = hasGit && hasPg;
     await fixture.store.updateTask(meta.id, { taskDoneRetryCount: 2 } as any);
     try {
       await fixture.selfHeal.autoArchiveResolvedMetaTasks();
-      const event = fixture.store.getRunAuditEvents({ limit: 200 }).find((e) => e.mutationType === "task:auto-archive-meta-resolved-skipped");
+      const event = (await fixture.store.getRunAuditEventsAsync({ limit: 200 })).find((e) => e.mutationType === "task:auto-archive-meta-resolved-skipped");
       expect((event?.metadata as any)?.blockedBy).toEqual(expect.arrayContaining(["task-done-retry-pending"]));
     } finally {
       await fixture.cleanup();
@@ -90,13 +90,13 @@ const canRun = hasGit && hasPg;
     try {
       await fixture.selfHeal.autoArchiveResolvedMetaTasks();
       await fixture.selfHeal.autoArchiveResolvedMetaTasks();
-      let events = fixture.store.getRunAuditEvents({ limit: 200 }).filter((e) => e.mutationType === "task:auto-archive-meta-resolved-skipped");
+      let events = (await fixture.store.getRunAuditEventsAsync({ limit: 200 })).filter((e) => e.mutationType === "task:auto-archive-meta-resolved-skipped");
       expect(events).toHaveLength(1);
       expect((events[0]?.metadata as any)?.blockedBy).toEqual(expect.arrayContaining(["task-done-retry-pending"]));
 
       await fixture.store.updateTask(meta.id, { taskDoneRetryCount: 0, status: "merging" } as any);
       await fixture.selfHeal.autoArchiveResolvedMetaTasks();
-      events = fixture.store.getRunAuditEvents({ limit: 200 }).filter((e) => e.mutationType === "task:auto-archive-meta-resolved-skipped");
+      events = (await fixture.store.getRunAuditEventsAsync({ limit: 200 })).filter((e) => e.mutationType === "task:auto-archive-meta-resolved-skipped");
       expect(events).toHaveLength(2);
       expect(events.some((event) => (event.metadata as any)?.blockedBy?.includes("merge-in-progress"))).toBe(true);
     } finally {
@@ -113,7 +113,7 @@ const canRun = hasGit && hasPg;
     await fixture.store.updateTask(meta.id, updates as any);
     try {
       await fixture.selfHeal.autoArchiveResolvedMetaTasks();
-      const event = fixture.store.getRunAuditEvents({ limit: 200 }).find((e) => e.mutationType === "task:auto-archive-meta-resolved-skipped");
+      const event = (await fixture.store.getRunAuditEventsAsync({ limit: 200 })).find((e) => e.mutationType === "task:auto-archive-meta-resolved-skipped");
       expect((event?.metadata as any)?.blockedBy).toEqual(expect.arrayContaining(["merge-in-progress"]));
     } finally {
       await fixture.cleanup();
@@ -128,7 +128,7 @@ const canRun = hasGit && hasPg;
     activeSessionRegistry.registerPath(activePath, { taskId: meta.id, kind: "executor", ownerKey: meta.id });
     try {
       await fixture.selfHeal.autoArchiveResolvedMetaTasks();
-      const event = fixture.store.getRunAuditEvents({ limit: 200 }).find((e) => e.mutationType === "task:auto-archive-meta-resolved-skipped");
+      const event = (await fixture.store.getRunAuditEventsAsync({ limit: 200 })).find((e) => e.mutationType === "task:auto-archive-meta-resolved-skipped");
       expect((event?.metadata as any)?.blockedBy).toEqual(expect.arrayContaining(["active-session"]));
     } finally {
       activeSessionRegistry.unregisterPath(activePath);
@@ -141,7 +141,7 @@ const canRun = hasGit && hasPg;
     await fixture.store.updateTask(meta.id, { taskDoneRetryCount: 1, status: "merging" } as any);
     try {
       await fixture.selfHeal.autoArchiveResolvedMetaTasks();
-      const event = fixture.store.getRunAuditEvents({ limit: 200 }).find((e) => e.mutationType === "task:auto-archive-meta-resolved-skipped");
+      const event = (await fixture.store.getRunAuditEventsAsync({ limit: 200 })).find((e) => e.mutationType === "task:auto-archive-meta-resolved-skipped");
       expect((event?.metadata as any)?.blockedBy).toEqual(expect.arrayContaining(["task-done-retry-pending", "merge-in-progress"]));
     } finally {
       await fixture.cleanup();
@@ -154,7 +154,7 @@ const canRun = hasGit && hasPg;
       const archived = await fixture.selfHeal.autoArchiveResolvedMetaTasks();
       expect(archived).toBe(1);
       expect((await fixture.store.getTask(meta.id))?.column).toBe("archived");
-      const audits = fixture.store.getRunAuditEvents({ limit: 200 });
+      const audits = await fixture.store.getRunAuditEventsAsync({ limit: 200 });
       expect(audits.some((event) => event.mutationType === "task:auto-archived-meta-resolved")).toBe(true);
       expect(audits.some((event) => event.mutationType === "task:auto-archive-meta-resolved-skipped")).toBe(false);
     } finally {
@@ -163,7 +163,7 @@ const canRun = hasGit && hasPg;
   });
 
   it("emits stalled skipped event when guards block stalled archive", async () => {
-    vi.useFakeTimers();
+    // FNXC:PgMigrationQuarantine 2026-07-17-18:30: pin Date for stale-archive thresholds while retaining real timers so PostgreSQL fixture I/O cannot deadlock.
     const now = new Date("2026-05-18T12:00:00.000Z");
     vi.setSystemTime(now);
     const { fixture, meta } = await createResolvedMetaPair({ metaTaskStallAutoCloseMs: 60_000 });
@@ -172,7 +172,7 @@ const canRun = hasGit && hasPg;
     try {
       const archived = await fixture.selfHeal.autoArchiveStalledMetaTasks();
       expect(archived).toBe(0);
-      const event = fixture.store.getRunAuditEvents({ limit: 200 }).find((e) => e.mutationType === "task:auto-archive-meta-stalled-skipped");
+      const event = (await fixture.store.getRunAuditEventsAsync({ limit: 200 })).find((e) => e.mutationType === "task:auto-archive-meta-stalled-skipped");
       expect(event).toBeTruthy();
       expect((event?.metadata as any)?.blockedBy).toEqual(expect.arrayContaining(["task-done-retry-pending"]));
     } finally {
@@ -182,7 +182,7 @@ const canRun = hasGit && hasPg;
   });
 
   it("dedupes stalled skipped audits until the guard reason changes", async () => {
-    vi.useFakeTimers();
+    // FNXC:PgMigrationQuarantine 2026-07-17-18:30: pin Date for stale-archive thresholds while retaining real timers so PostgreSQL fixture I/O cannot deadlock.
     const now = new Date("2026-05-18T12:00:00.000Z");
     vi.setSystemTime(now);
     const { fixture, meta } = await createResolvedMetaPair({ metaTaskStallAutoCloseMs: 60_000 });
@@ -191,13 +191,13 @@ const canRun = hasGit && hasPg;
     try {
       await fixture.selfHeal.autoArchiveStalledMetaTasks();
       await fixture.selfHeal.autoArchiveStalledMetaTasks();
-      let events = fixture.store.getRunAuditEvents({ limit: 200 }).filter((e) => e.mutationType === "task:auto-archive-meta-stalled-skipped");
+      let events = (await fixture.store.getRunAuditEventsAsync({ limit: 200 })).filter((e) => e.mutationType === "task:auto-archive-meta-stalled-skipped");
       expect(events).toHaveLength(1);
       expect((events[0]?.metadata as any)?.blockedBy).toEqual(expect.arrayContaining(["task-done-retry-pending"]));
 
       await fixture.store.updateTask(meta.id, { taskDoneRetryCount: 0, status: "merging" } as any);
       await fixture.selfHeal.autoArchiveStalledMetaTasks();
-      events = fixture.store.getRunAuditEvents({ limit: 200 }).filter((e) => e.mutationType === "task:auto-archive-meta-stalled-skipped");
+      events = (await fixture.store.getRunAuditEventsAsync({ limit: 200 })).filter((e) => e.mutationType === "task:auto-archive-meta-stalled-skipped");
       expect(events).toHaveLength(2);
       expect(events.some((event) => (event.metadata as any)?.blockedBy?.includes("merge-in-progress"))).toBe(true);
     } finally {
diff --git a/packages/engine/src/__tests__/triage-token-usage.test.ts b/packages/engine/src/__tests__/triage-token-usage.test.ts
index dab2cf3007..552cc1547d 100644
--- a/packages/engine/src/__tests__/triage-token-usage.test.ts
+++ b/packages/engine/src/__tests__/triage-token-usage.test.ts
@@ -1,10 +1,7 @@
-import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
-import { mkdtempSync } from "node:fs";
-import { rm } from "node:fs/promises";
-import { join } from "node:path";
-import { tmpdir } from "node:os";
+import { afterEach, beforeEach, expect, it, vi } from "vitest";
 import type { AgentSession } from "@earendil-works/pi-coding-agent";
-import { aggregateTokenAnalytics, Database, type Task, type TaskStore } from "@fusion/core";
+import { aggregateTokenAnalytics, type Task, type TaskStore } from "@fusion/core";
+import { createTaskStoreForTest, pgDescribe, type PgTestHarness } from "../../../core/src/__test-utils__/pg-test-harness.js";
 import { TriageProcessor } from "../triage.js";
 
 interface MockSessionStats {
@@ -59,34 +56,9 @@ async function flushAsyncRecorders(): Promise<void> {
   await new Promise<void>((resolve) => setImmediate(resolve));
 }
 
-function insertUsageTask(db: Database, task: Task): void {
-  const usage = task.tokenUsage;
-  if (!usage) throw new Error("expected token usage");
-  db.prepare(
-    `INSERT INTO tasks
-       (id, description, "column", createdAt, updatedAt,
-        tokenUsageInputTokens, tokenUsageOutputTokens, tokenUsageCachedTokens,
-        tokenUsageCacheWriteTokens, tokenUsageTotalTokens, tokenUsageLastUsedAt,
-        modelProvider, modelId, tokenUsageModelProvider, tokenUsageModelId, tokenUsagePerModel)
-     VALUES (?, 'desc', 'todo', '2026-01-01T00:00:00.000Z', '2026-01-01T00:00:00.000Z',
-             ?, ?, ?, ?, ?, ?, null, null, ?, ?, ?)`,
-  ).run(
-    task.id,
-    usage.inputTokens,
-    usage.outputTokens,
-    usage.cachedTokens,
-    usage.cacheWriteTokens,
-    usage.totalTokens,
-    usage.lastUsedAt,
-    usage.modelProvider ?? null,
-    usage.modelId ?? null,
-    JSON.stringify(usage.perModel ?? []),
-  );
-}
-
-describe("triage session token usage recording", () => {
-  let tmpDir: string | undefined;
-  let db: Database | undefined;
+/* FNXC:PgMigrationQuarantine 2026-07-17-18:25: FN-8258 proves token analytics through AsyncDataLayer project-scoped rows, replacing removed raw SQLite Database seeding. */
+pgDescribe("triage session token usage recording", () => {
+  let harness: PgTestHarness;
 
   beforeEach(() => {
     vi.useRealTimers();
@@ -94,12 +66,7 @@ describe("triage session token usage recording", () => {
   });
 
   afterEach(async () => {
-    db?.close();
-    if (tmpDir) {
-      await rm(tmpDir, { recursive: true, force: true });
-    }
-    tmpDir = undefined;
-    db = undefined;
+    await harness?.teardown();
   });
 
   it("records a triage-only Anthropic planning model and surfaces it in by-model analytics", async () => {
@@ -136,18 +103,17 @@ describe("triage session token usage recording", () => {
       }),
     ]);
 
-    tmpDir = mkdtempSync(join(tmpdir(), "kb-triage-token-analytics-"));
-    db = new Database(join(tmpDir, ".fusion"));
-    db.init();
-    insertUsageTask(db, store._task);
+    harness = await createTaskStoreForTest({ prefix: "fusion_triage_token_usage" });
+    const persisted = await harness.store.createTask({ description: "triage analytics" });
+    await harness.store.updateTask(persisted.id, { tokenUsage: store._task.tokenUsage });
 
-    const byModel = await aggregateTokenAnalytics(db, { groupBy: "model" });
+    const byModel = await aggregateTokenAnalytics(harness.layer, { groupBy: "model" });
     expect(byModel.totals).toMatchObject({ totalTokens: 165, nTasks: 1 });
     expect(byModel.groups).toEqual([
       expect.objectContaining({ key: "claude-sonnet-4-5", totalTokens: 165, nTasks: 1 }),
     ]);
 
-    const byProvider = await aggregateTokenAnalytics(db, { groupBy: "provider" });
+    const byProvider = await aggregateTokenAnalytics(harness.layer, { groupBy: "provider" });
     expect(byProvider.groups).toEqual([
       expect.objectContaining({ key: "anthropic", totalTokens: 165, nTasks: 1 }),
     ]);
diff --git a/packages/engine/src/__tests__/workflow-graph-task-runner.test.ts b/packages/engine/src/__tests__/workflow-graph-task-runner.test.ts
index 183ca3f11f..adad89ee80 100644
--- a/packages/engine/src/__tests__/workflow-graph-task-runner.test.ts
+++ b/packages/engine/src/__tests__/workflow-graph-task-runner.test.ts
@@ -1,10 +1,7 @@
 import { describe, expect, it, vi } from "vitest";
 import { EventEmitter } from "node:events";
-import { mkdtempSync, rmSync } from "node:fs";
-import { tmpdir } from "node:os";
-import { join } from "node:path";
 import type { Settings, TaskDetail, WorkflowDefinition, WorkflowIr } from "@fusion/core";
-import { TaskStore } from "@fusion/core";
+import { createTaskStoreForTest, PG_AVAILABLE } from "../../../core/src/__test-utils__/pg-test-harness.js";
 
 import { NotificationService } from "../notification/notification-service.js";
 import { WorkflowGraphTaskRunner, type WorkflowGraphRunnerStore } from "../workflow-graph-task-runner.js";
@@ -268,10 +265,10 @@ describe("WorkflowGraphTaskRunner (CU-U2)", () => {
     expect(result.reason).toMatch(/workflow-missing/);
   });
 
-  it("persists a valid workflow through the store and launches it through the graph runner", async () => {
-    const rootDir = mkdtempSync(join(tmpdir(), "fn-7113-workflow-run-"));
-    const globalDir = mkdtempSync(join(tmpdir(), "fn-7113-workflow-global-"));
-    const store = new TaskStore(rootDir, globalDir, { inMemoryDb: true });
+  // FNXC:PgMigrationQuarantine 2026-07-17-18:15: FN-8258 exercises persisted workflow selection against the PostgreSQL AsyncDataLayer rather than removed SQLite inMemoryDb construction.
+  (PG_AVAILABLE ? it : it.skip)("persists a valid workflow through the store and launches it through the graph runner", async () => {
+    const harness = await createTaskStoreForTest({ prefix: "fusion_workflow_graph_runner" });
+    const store = harness.store;
     try {
       const invalidIr: WorkflowIr = {
         version: "v2",
@@ -313,8 +310,7 @@ describe("WorkflowGraphTaskRunner (CU-U2)", () => {
       expect(result.disposition).toBe("completed");
       expect(calls).toEqual(["custom:lint", "execute", "review", "merge", "custom:notify"]);
     } finally {
-      rmSync(rootDir, { recursive: true, force: true });
-      rmSync(globalDir, { recursive: true, force: true });
+      await harness.teardown();
     }
   });
 
diff --git a/packages/engine/src/hybrid-executor-gate.ts b/packages/engine/src/hybrid-executor-gate.ts
index fff7e4c5cc..94b0bb7c39 100644
--- a/packages/engine/src/hybrid-executor-gate.ts
+++ b/packages/engine/src/hybrid-executor-gate.ts
@@ -25,7 +25,13 @@ export async function shouldUseHybridExecutor(centralCore: CentralCore): Promise
 
   try {
     const nodes = await centralCore.listNodes();
-    if (nodes.length > 1) {
+    /*
+    FNXC:HybridExecutorRouting 2026-07-18-01:35:
+    Local project registrations may create more than one local node record. HybridExecutor
+    only adds value when a remote node is routable, so node count must not enable duplicate
+    local runtimes for a local-only multi-project installation.
+    */
+    if (nodes.some((node) => node.type === "remote")) {
       return { enabled: true, reason: "multi-node" };
     }
 
diff --git a/packages/engine/vitest.config.ts b/packages/engine/vitest.config.ts
index 8308f68e9d..8119d7db69 100644
--- a/packages/engine/vitest.config.ts
+++ b/packages/engine/vitest.config.ts
@@ -295,7 +295,7 @@ export default defineConfig({
             // SQLite-path gate test evicted + quarantined (see engine-core comment + ledger).
             "node_modules/**",
             "dist/**",
-            // FNXC:PgMigrationQuarantine 2026-07-17-16:50: FN-8252 rescued the semantic async-store holdouts through production PostgreSQL seams and current async harnesses; retain only the remaining paired quarantines.
+            // FNXC:PgMigrationQuarantine 2026-07-18-02:10: FN-8258 rescued the ten remaining VAL-REMOVAL-005 holdouts through PostgreSQL harnesses and production-shaped async contracts; retain only unresolved paired quarantines.
             // FNXC:PgMigrationQuarantine 2026-07-14-08:00:
             // FNXC:WorkflowStepInstancePersistence 2026-07-16-20:35: FN-8157 restores this PG-backed foreach suite through async store persistence, so it must execute in engine-default.
             // VAL-REMOVAL-005 deleted the SQLite Database class. These engine-default files fail
@@ -303,19 +303,9 @@ export default defineConfig({
             // getDatabase, walCheckpoint) that throw/return-empty in backend mode, or have mock
             // drift from the async-satellite cutover. Quarantined on sight per AGENTS.md.
             "src/__tests__/backlog-pressure-reporter.test.ts",
-            "src/__tests__/mission-factory-parity.integration.test.ts",
-            "src/__tests__/workflow-graph-task-runner.test.ts",
-            "src/__tests__/agent-tools-intake-column.test.ts",
-            "src/__tests__/agent-workflow-tools-exposure.test.ts",
             "src/__tests__/dependency-blocked-todo-reporter.test.ts",
-            "src/__tests__/executor-task-done-invariant.test.ts",
             "src/__tests__/goal-injection-diagnostics-wiring.test.ts",
-            "src/__tests__/group-merge-coordinator.test.ts",
-            "src/__tests__/hybrid-executor-multi-node-routing.test.ts",
             "src/__tests__/merger-cwd-fallback-removed.test.ts",
-            "src/__tests__/routine-runner.test.ts",
-            "src/__tests__/self-healing-meta-archive-guards.test.ts",
-            "src/__tests__/triage-token-usage.test.ts",
             /*
             FNXC:EngineTests 2026-07-18-08:15:
             heartbeat-error-recovery timed out at 30s on full-suite shard 1
diff --git a/scripts/lib/test-quarantine.json b/scripts/lib/test-quarantine.json
index aa468042c2..0a1c50ef34 100644
--- a/scripts/lib/test-quarantine.json
+++ b/scripts/lib/test-quarantine.json
@@ -1,76 +1,26 @@
 {
-  "$comment": "Flaky-test quarantine ledger (deletion ratchet \u2014 see AGENTS.md 'Flaky tests: quarantine on sight' and docs/testing.md 'Quarantine ledger and the deletion ratchet'). A test observed failing without a corresponding real bug is quarantined ON SIGHT: add an entry here AND a matching one-line `exclude` entry in that package's vitest config, in the same commit. Every entry needs a non-empty `reason` (link the failing run) and a `quarantinedAt` date \u2014 the entry expires 14 days later, at which point the test file is DELETED unless someone rescues it with evidence it catches real regressions plus a root-cause fix (never appeasement). There is deliberately no loader module and no automation around this file: it is a dated record, the vitest config is the enforcement.",
+  "$comment": "Flaky-test quarantine ledger (deletion ratchet — see AGENTS.md 'Flaky tests: quarantine on sight' and docs/testing.md 'Quarantine ledger and the deletion ratchet'). A test observed failing without a corresponding real bug is quarantined ON SIGHT: add an entry here AND a matching one-line `exclude` entry in that package's vitest config, in the same commit. Every entry needs a non-empty `reason` (link the failing run) and a `quarantinedAt` date — the entry expires 14 days later, at which point the test file is DELETED unless someone rescues it with evidence it catches real regressions plus a root-cause fix (never appeasement). There is deliberately no loader module and no automation around this file: it is a dated record, the vitest config is the enforcement.",
   "entries": [
     {
       "file": "packages/engine/src/__tests__/backlog-pressure-reporter.test.ts",
       "reason": "VAL-REMOVAL-005 PG migration: fails due to SQLite removal or sync API incompatibility in backend mode. Failing run: https://github.com/Runfusion/Fusion/actions/runs/29344576232. Mirrored in packages/engine/vitest.config.ts.",
       "quarantinedAt": "2026-07-14"
     },
-    {
-      "file": "packages/engine/src/__tests__/mission-factory-parity.integration.test.ts",
-      "reason": "VAL-REMOVAL-005 PG migration: fails due to SQLite removal or sync API incompatibility in backend mode. Failing run: https://github.com/Runfusion/Fusion/actions/runs/29344576232. Mirrored in packages/engine/vitest.config.ts.",
-      "quarantinedAt": "2026-07-14"
-    },
-    {
-      "file": "packages/engine/src/__tests__/workflow-graph-task-runner.test.ts",
-      "reason": "VAL-REMOVAL-005 PG migration: fails due to SQLite removal or sync API incompatibility in backend mode. Failing run: https://github.com/Runfusion/Fusion/actions/runs/29344576232. Mirrored in packages/engine/vitest.config.ts.",
-      "quarantinedAt": "2026-07-14"
-    },
-    {
-      "file": "packages/engine/src/__tests__/agent-tools-intake-column.test.ts",
-      "reason": "VAL-REMOVAL-005 PG migration: fails due to SQLite removal or sync API incompatibility in backend mode. Failing run: https://github.com/Runfusion/Fusion/actions/runs/29344576232. Mirrored in packages/engine/vitest.config.ts.",
-      "quarantinedAt": "2026-07-14"
-    },
-    {
-      "file": "packages/engine/src/__tests__/agent-workflow-tools-exposure.test.ts",
-      "reason": "VAL-REMOVAL-005 PG migration: fails due to SQLite removal or sync API incompatibility in backend mode. Failing run: https://github.com/Runfusion/Fusion/actions/runs/29344576232. Mirrored in packages/engine/vitest.config.ts.",
-      "quarantinedAt": "2026-07-14"
-    },
     {
       "file": "packages/engine/src/__tests__/dependency-blocked-todo-reporter.test.ts",
       "reason": "VAL-REMOVAL-005 PG migration: fails due to SQLite removal or sync API incompatibility in backend mode. Failing run: https://github.com/Runfusion/Fusion/actions/runs/29344576232. Mirrored in packages/engine/vitest.config.ts.",
       "quarantinedAt": "2026-07-14"
     },
-    {
-      "file": "packages/engine/src/__tests__/executor-task-done-invariant.test.ts",
-      "reason": "VAL-REMOVAL-005 PG migration: fails due to SQLite removal or sync API incompatibility in backend mode. Failing run: https://github.com/Runfusion/Fusion/actions/runs/29344576232. Mirrored in packages/engine/vitest.config.ts.",
-      "quarantinedAt": "2026-07-14"
-    },
     {
       "file": "packages/engine/src/__tests__/goal-injection-diagnostics-wiring.test.ts",
       "reason": "VAL-REMOVAL-005 PG migration: fails due to SQLite removal or sync API incompatibility in backend mode. Failing run: https://github.com/Runfusion/Fusion/actions/runs/29344576232. Mirrored in packages/engine/vitest.config.ts.",
       "quarantinedAt": "2026-07-14"
     },
-    {
-      "file": "packages/engine/src/__tests__/group-merge-coordinator.test.ts",
-      "reason": "VAL-REMOVAL-005 PG migration: fails due to SQLite removal or sync API incompatibility in backend mode. Failing run: https://github.com/Runfusion/Fusion/actions/runs/29344576232. Mirrored in packages/engine/vitest.config.ts.",
-      "quarantinedAt": "2026-07-14"
-    },
-    {
-      "file": "packages/engine/src/__tests__/hybrid-executor-multi-node-routing.test.ts",
-      "reason": "VAL-REMOVAL-005 PG migration: fails due to SQLite removal or sync API incompatibility in backend mode. Failing run: https://github.com/Runfusion/Fusion/actions/runs/29344576232. Mirrored in packages/engine/vitest.config.ts.",
-      "quarantinedAt": "2026-07-14"
-    },
     {
       "file": "packages/engine/src/__tests__/merger-cwd-fallback-removed.test.ts",
       "reason": "VAL-REMOVAL-005 PG migration: fails due to SQLite removal or sync API incompatibility in backend mode. Failing run: https://github.com/Runfusion/Fusion/actions/runs/29344576232. Mirrored in packages/engine/vitest.config.ts.",
       "quarantinedAt": "2026-07-14"
     },
-    {
-      "file": "packages/engine/src/__tests__/routine-runner.test.ts",
-      "reason": "VAL-REMOVAL-005 PG migration: fails due to SQLite removal or sync API incompatibility in backend mode. Failing run: https://github.com/Runfusion/Fusion/actions/runs/29344576232. Mirrored in packages/engine/vitest.config.ts.",
-      "quarantinedAt": "2026-07-14"
-    },
-    {
-      "file": "packages/engine/src/__tests__/self-healing-meta-archive-guards.test.ts",
-      "reason": "VAL-REMOVAL-005 PG migration: fails due to SQLite removal or sync API incompatibility in backend mode. Failing run: https://github.com/Runfusion/Fusion/actions/runs/29344576232. Mirrored in packages/engine/vitest.config.ts.",
-      "quarantinedAt": "2026-07-14"
-    },
-    {
-      "file": "packages/engine/src/__tests__/triage-token-usage.test.ts",
-      "reason": "VAL-REMOVAL-005 PG migration: fails due to SQLite removal or sync API incompatibility in backend mode. Failing run: https://github.com/Runfusion/Fusion/actions/runs/29344576232. Mirrored in packages/engine/vitest.config.ts.",
-      "quarantinedAt": "2026-07-14"
-    },
     {
       "file": "packages/engine/src/__tests__/reliability-interactions/integration-worktree-state.test.ts",
       "reason": "VAL-REMOVAL-005 PG migration: reliability fixture uses PG-backed store but sync APIs (getRunAuditEvents, getDatabase) fail in backend mode. Failing run: https://github.com/Runfusion/Fusion/actions/runs/29344576232. Mirrored in packages/engine/vitest.config.ts.",