diff --git a/.changeset/fn-7190-linear-builtin-todo-hold.md b/.changeset/fn-7190-linear-builtin-todo-hold.md
new file mode 100644
index 0000000000..ab0520bf76
--- /dev/null
+++ b/.changeset/fn-7190-linear-builtin-todo-hold.md
@@ -0,0 +1,7 @@
+---
+"@runfusion/fusion": patch
+---
+
+summary: Fix Compound Engineering, Quick fix, and Review-heavy workflow tasks getting stuck in Todo.
+category: fix
+dev: linear() built-in workflows now synthesize the canonical default column traits (hold(capacity) on todo, wip on in-progress, merge on in-review) matching BUILTIN_CODING_WORKFLOW_IR, so the hold/release sweep dispatches their todo cards. Fixes FN-7190.
diff --git a/docs/workflow-editor.md b/docs/workflow-editor.md
index a69adb3bfe..2fdc28d68b 100644
--- a/docs/workflow-editor.md
+++ b/docs/workflow-editor.md
@@ -138,7 +138,7 @@ Fusion ships built-in workflows as read-only references:
 - `builtin:stepwise-coding` — a graph variant that models per-step parse, execute, review, and rework structure.
 - `builtin:design` — a UI-heavy work path with a gated design/UX review before standard review and merge.
 
-Built-ins can be viewed, exported, and used as templates, but their graph, columns, field declarations, and setting declarations are not editable. Their per-project setting **values** are editable from the Settings panel's Values tab.
+Built-ins can be viewed, exported, and used as templates, but their graph, columns, field declarations, and setting declarations are not editable. Their per-project setting **values** are editable from the Settings panel's Values tab. Selectable built-ins all use a capacity-released queue column (`todo` or a workflow-specific backlog) that dispatches to the active WIP column through the standard hold/release sweep.
 
 To customize behavior, create a workflow from **Blank** or copy a built-in/custom workflow with **Duplicate to customize**. Tasks select a workflow by workflow id. Agents and automation can discover workflows with `fn_workflow_list`, assign one to an existing task with `fn_workflow_select`, or pass `workflow_id` when creating tasks through `fn_task_create` / delegation tools.
 
diff --git a/docs/workflow-steps.md b/docs/workflow-steps.md
index 9dc35a13b8..5801dbbe71 100644
--- a/docs/workflow-steps.md
+++ b/docs/workflow-steps.md
@@ -21,6 +21,9 @@ Agents may select or change a workflow only when the user explicitly requested t
 
 FNXC:Docs 2026-06-21-12:00:
 FN-6906 makes non-coding built-in prompts artifact-oriented: marketing drafts, lead enrichment/outreach, and design previews are persisted with fn_task_document_write, while fn_artifact_register remains conditional until the artifact tool is available.
+
+FNXC:WorkflowRuntime 2026-06-28-08:10:
+Selectable built-in workflows must share the canonical dispatch traits: their held work enters through a capacity-released `todo`/backlog column and moves to the first WIP execution column via the hold/release sweep, so non-default built-ins do not need a separate dispatcher.
 -->
 
 Fusion workflows define the task lifecycle policy that moves work from an idea to delivery. The default coding path is **Plan/Triage → Execute → Workflow steps → Review → Merge**, but that path is now represented as a workflow selection rather than only as fixed engine behavior. A task with no explicit workflow resolves to `builtin:coding`; an explicit missing/corrupt custom workflow fails closed instead of silently falling back.
@@ -51,6 +54,8 @@ Decision-only or investigation tasks can also declare `noCommitsExpected` / `**N
 | PR lifecycle | `builtin:pr-workflow` | Reusable PR lifecycle graph fragment (create PR → await review → respond → gate → merge); it is a fragment, not directly selectable as a task workflow. |
 | Lead generation | `builtin:lead-generation` | Selectable business workflow for sourcing, qualifying, enriching, and contacting leads with custom lead fields, stage columns, and reviewable enrichment/outreach task documents; requires the workflow graph executor for custom board columns. |
 
+Every selectable built-in workflow uses a capacity-released hold column (`todo` or a workflow-specific backlog) for queued work and a WIP execution column for active work, so the hold/release sweep performs the normal `todo`/backlog → in-progress dispatch across the catalog.
+
 ### Skill-backed workflow steps
 
 <!--
diff --git a/packages/core/src/__tests__/builtin-workflows.test.ts b/packages/core/src/__tests__/builtin-workflows.test.ts
index 4838a986c8..ff45c36520 100644
--- a/packages/core/src/__tests__/builtin-workflows.test.ts
+++ b/packages/core/src/__tests__/builtin-workflows.test.ts
@@ -18,6 +18,12 @@ import { DEFAULT_WORKFLOW_COLUMN_IDS, parseWorkflowIr, serializeWorkflowIr } fro
 import { createSharedTaskStoreTestHarness } from "./store-test-helpers.js";
 
 const EXECUTE_NODE_MAX_RETRIES = 2;
+const LINEAR_BUILTIN_IDS = [
+  "builtin:quick-fix",
+  "builtin:review-heavy",
+  "builtin:design",
+  "builtin:compound-engineering",
+] as const;
 
 function browserVerificationInnerConfig(ir: { nodes: Array<{ id: string; kind: string; config?: Record<string, unknown> }> }): Record<string, unknown> {
   const group = ir.nodes.find((node) => node.id === BROWSER_VERIFICATION_GROUP_ID);
@@ -25,6 +31,13 @@ function browserVerificationInnerConfig(ir: { nodes: Array<{ id: string; kind: s
   return template?.nodes?.find((node) => node.id === BROWSER_VERIFICATION_STEP_NODE_ID)?.config ?? {};
 }
 
+function columnTraitMatrix(ir: { columns: Array<{ id: string; traits: Array<{ trait: string; config?: unknown }> }> }): Array<{
+  id: string;
+  traits: Array<{ trait: string; config?: unknown }>;
+}> {
+  return ir.columns.map((column) => ({ id: column.id, traits: column.traits }));
+}
+
 describe("built-in workflows", () => {
   // Non-compiler built-ins model graph-only node kinds or reusable fragments the
   // linear compiler cannot lower to a step list. They still must parse as valid IR.
@@ -142,6 +155,103 @@ describe("built-in workflows", () => {
     expect(serializeWorkflowIr(coding!.ir)).toBe(serializeWorkflowIr(BUILTIN_CODING_WORKFLOW_IR));
   });
 
+  it("linear built-ins use the canonical trait-bearing default columns", () => {
+    expect(BUILTIN_CODING_WORKFLOW_IR.version).toBe("v2");
+    if (BUILTIN_CODING_WORKFLOW_IR.version !== "v2") throw new Error("expected coding v2");
+    const canonicalColumns = columnTraitMatrix(BUILTIN_CODING_WORKFLOW_IR);
+
+    for (const workflowId of LINEAR_BUILTIN_IDS) {
+      const workflow = getBuiltinWorkflow(workflowId);
+      expect(workflow, workflowId).toBeDefined();
+      const ir = parseWorkflowIr(workflow!.ir);
+      expect(ir.version, workflowId).toBe("v2");
+      if (ir.version !== "v2") throw new Error(`expected ${workflowId} v2`);
+
+      expect(columnTraitMatrix(ir), workflowId).toEqual(canonicalColumns);
+      const todo = ir.columns.find((column) => column.id === "todo");
+      expect(todo?.traits).toContainEqual({ trait: "hold", config: { release: "capacity" } });
+      expect(todo?.traits).toContainEqual({ trait: "reset-on-entry" });
+      expect(ir.columns.find((column) => column.id === "in-progress")?.traits.map((trait) => trait.trait)).toContain("wip");
+      expect(ir.columns.find((column) => column.id === "in-review")?.traits.map((trait) => trait.trait)).toContain("merge");
+    }
+
+    const quickFix = parseWorkflowIr(getBuiltinWorkflow("builtin:quick-fix")!.ir);
+    if (quickFix.version !== "v2") throw new Error("expected quick-fix v2");
+    expect(quickFix.nodes.find((node) => node.id === "execute")?.column).toBe("in-progress");
+    expect(quickFix.nodes.find((node) => node.id === "merge")?.column).toBe("in-review");
+  });
+
+  it("hand-authored built-in workflow columns stay on their authored trait sets", () => {
+    const expected = new Map([
+      [
+        "builtin:coding",
+        [
+          { id: "triage", traits: ["intake"] },
+          { id: "todo", traits: ["hold", "reset-on-entry"] },
+          { id: "in-progress", traits: ["wip", "abort-on-exit", "timing"] },
+          { id: "in-review", traits: ["merge-blocker", "human-review", "stall-detection", "merge"] },
+          { id: "done", traits: ["complete"] },
+          { id: "archived", traits: ["archived"] },
+        ],
+      ],
+      [
+        "builtin:marketing",
+        [
+          { id: "ideation", traits: ["intake"] },
+          { id: "backlog", traits: ["hold", "reset-on-entry"] },
+          { id: "drafting", traits: ["wip", "abort-on-exit", "timing"] },
+          { id: "editorial-review", traits: ["merge-blocker", "human-review", "stall-detection", "merge"] },
+          { id: "published", traits: ["complete"] },
+          { id: "archived", traits: ["archived"] },
+        ],
+      ],
+      [
+        "builtin:stepwise-coding",
+        [
+          { id: "triage", traits: ["intake"] },
+          { id: "todo", traits: ["hold", "reset-on-entry"] },
+          { id: "in-progress", traits: ["wip", "abort-on-exit", "timing"] },
+          { id: "in-review", traits: ["merge-blocker", "human-review", "stall-detection", "merge"] },
+          { id: "done", traits: ["complete"] },
+          { id: "archived", traits: ["archived"] },
+        ],
+      ],
+      [
+        "builtin:lead-generation",
+        [
+          { id: "triage", traits: ["intake"] },
+          { id: "sourcing", traits: ["timing"] },
+          { id: "qualification", traits: ["wip", "timing"] },
+          { id: "enrichment", traits: ["timing"] },
+          { id: "outreach", traits: ["human-review", "stall-detection"] },
+          { id: "converted", traits: ["complete"] },
+          { id: "archived", traits: ["archived"] },
+        ],
+      ],
+      [
+        "builtin:pr-workflow",
+        [
+          { id: "triage", traits: ["intake"] },
+          { id: "in-progress", traits: ["wip", "timing"] },
+          { id: "await-review", traits: ["merge-blocker", "stall-detection"] },
+          { id: "done", traits: ["complete"] },
+          { id: "archived", traits: ["archived"] },
+        ],
+      ],
+    ]);
+
+    for (const [workflowId, expectedColumns] of expected) {
+      const workflow = getBuiltinWorkflow(workflowId)!;
+      const ir = parseWorkflowIr(workflow.ir);
+      expect(ir.version, workflowId).toBe("v2");
+      if (ir.version !== "v2") throw new Error(`expected ${workflowId} v2`);
+      expect(
+        ir.columns.map((column) => ({ id: column.id, traits: column.traits.map((trait) => trait.trait) })),
+        workflowId,
+      ).toEqual(expectedColumns);
+    }
+  });
+
   it("builtin:coding catalog IR exposes canonical columns, placements, and settings", () => {
     const coding = getBuiltinWorkflow("builtin:coding")!;
     const ir = parseWorkflowIr(coding.ir);
diff --git a/packages/core/src/builtin-workflows.ts b/packages/core/src/builtin-workflows.ts
index 0c4bff00f0..64d8d5d5f2 100644
--- a/packages/core/src/builtin-workflows.ts
+++ b/packages/core/src/builtin-workflows.ts
@@ -6,8 +6,8 @@ import { BUILTIN_STEPWISE_CODING_WORKFLOW_IR } from "./builtin-stepwise-coding-w
 import { BUILTIN_WORKFLOW_SETTINGS } from "./builtin-workflow-settings.js";
 import { builtinPromptConfig } from "./builtin-workflow-prompts.js";
 import type { WorkflowDefinition } from "./workflow-definition-types.js";
-import type { WorkflowIr, WorkflowIrNode } from "./workflow-ir-types.js";
-import { DEFAULT_WORKFLOW_COLUMN_IDS, parseWorkflowIr } from "./workflow-ir.js";
+import type { WorkflowIr, WorkflowIrColumn, WorkflowIrNode } from "./workflow-ir-types.js";
+import { parseWorkflowIr } from "./workflow-ir.js";
 
 /** Prefix marking a workflow as a read-only built-in template. */
 export const BUILTIN_WORKFLOW_ID_PREFIX = "builtin:";
@@ -51,8 +51,6 @@ interface BuiltinSpec {
   nodes: Array<{ id: string; kind: WorkflowIr["nodes"][number]["kind"]; config?: Record<string, unknown> }>;
 }
 
-const V1_LINEAR_NODE_KINDS = new Set<WorkflowIrNode["kind"]>(["start", "prompt", "script", "gate", "end"]);
-
 function defaultColumnForLinearNode(node: WorkflowIrNode): string {
   const seam = node.config?.seam;
   if (seam === "execute") return "in-progress";
@@ -61,6 +59,19 @@ function defaultColumnForLinearNode(node: WorkflowIrNode): string {
   return "todo";
 }
 
+function canonicalBuiltinWorkflowColumns(): WorkflowIrColumn[] {
+  if (BUILTIN_CODING_WORKFLOW_IR.version !== "v2") {
+    throw new Error("builtin coding workflow must be v2 to provide canonical columns");
+  }
+  return BUILTIN_CODING_WORKFLOW_IR.columns.map((column) => ({
+    ...column,
+    traits: column.traits.map((trait) => ({
+      ...trait,
+      config: trait.config ? { ...trait.config } : undefined,
+    })),
+  }));
+}
+
 /** Build a linear IR (start → nodes… → end) with simple x-spaced layout. */
 function linear(spec: BuiltinSpec): WorkflowDefinition {
   const nodes: WorkflowIr["nodes"] = [
@@ -82,20 +93,23 @@ function linear(spec: BuiltinSpec): WorkflowDefinition {
   nodes.forEach((node, i) => {
     layout[node.id] = { x: 60 + i * 170, y: 160 };
   });
-  const hasV2OnlyNode = nodes.some((node) => !V1_LINEAR_NODE_KINDS.has(node.kind));
-  const ir = hasV2OnlyNode
-    ? parseWorkflowIr({
-        version: "v2",
-        name: spec.name,
-        columns: DEFAULT_WORKFLOW_COLUMN_IDS.map((id) => ({ id, name: id, traits: [] })),
-        nodes: nodes.map((node) => (node.column ? node : { ...node, column: defaultColumnForLinearNode(node) })),
-        edges,
-      })
-    : parseWorkflowIr({ version: "v1", name: spec.name, nodes, edges });
+  /*
+   * FNXC:Workflows 2026-06-28-00:00:
+   * Linear built-ins must mirror BUILTIN_CODING_WORKFLOW_IR column traits because the post-cutover hold/release sweep is the only todo→in-progress dispatcher. Both formerly-v1 linear graphs (quick-fix, review-heavy, design) and v2-only compound-engineering need todo hold(capacity), in-progress wip, and in-review merge traits or their cards strand in Todo.
+   */
+  const ir = parseWorkflowIr({
+    version: "v2",
+    name: spec.name,
+    columns: canonicalBuiltinWorkflowColumns(),
+    nodes: nodes.map((node) => (node.column ? node : { ...node, column: defaultColumnForLinearNode(node) })),
+    edges,
+  });
+  if (ir.version !== "v2" || !ir.columns.find((column) => column.id === "todo")?.traits.some((trait) => trait.trait === "hold")) {
+    throw new Error(`linear built-in workflow '${spec.id}' must synthesize a hold-capacity todo column`);
+  }
   // Attach the moved-key settings catalog (U1/U3, R4) so every built-in workflow
   // carries its declarations through the resolver path (resolveWorkflowIrById →
-  // resolveEffectiveSettings). v1 graphs upgrade to v2 on parse, so the parsed IR
-  // is v2 and can carry `settings`. Defaults are byte-equal to legacy
+  // resolveEffectiveSettings). Defaults are byte-equal to legacy
   // DEFAULT_PROJECT_SETTINGS literals, so this is behavior-inert.
   if (ir.version === "v2") {
     ir.settings = BUILTIN_WORKFLOW_SETTINGS;
diff --git a/packages/engine/src/__tests__/hold-release.test.ts b/packages/engine/src/__tests__/hold-release.test.ts
index 43ffc1a259..14426c69d1 100644
--- a/packages/engine/src/__tests__/hold-release.test.ts
+++ b/packages/engine/src/__tests__/hold-release.test.ts
@@ -63,6 +63,12 @@ function setTransitionPending(store: TaskStore, taskId: string, toColumn: string
 }
 
 const noReserveDeps: HoldReleaseDeps = { now: () => Date.now() };
+const LINEAR_BUILTIN_WORKFLOW_IDS = [
+  "builtin:compound-engineering",
+  "builtin:quick-fix",
+  "builtin:review-heavy",
+  "builtin:design",
+] as const;
 
 describe("hold-release sweep (U6)", () => {
   let rootDir = "";
@@ -96,6 +102,28 @@ describe("hold-release sweep (U6)", () => {
     return task.id;
   }
 
+  it("releases default and linear built-in workflow todo cards into in-progress", async () => {
+    await store.updateSettings({ maxConcurrent: 10 } as Parameters<typeof store.updateSettings>[0]);
+    const defaultWorkflowTask = await seedTodoCard();
+    const selectedTasks: string[] = [];
+
+    // Pre-fix, linear() synthesized trait-less default columns, so isHeldTask()
+    // returned false here and these selected tasks were silently skipped forever.
+    for (const workflowId of LINEAR_BUILTIN_WORKFLOW_IDS) {
+      const task = await store.createTask({ description: `card ${workflowId}` });
+      setSelection(store, task.id, workflowId);
+      setColumn(store, task.id, "todo");
+      selectedTasks.push(task.id);
+    }
+
+    const result = await runHoldReleaseSweep(store, noReserveDeps);
+    expect(result.released).toEqual(expect.arrayContaining([defaultWorkflowTask, ...selectedTasks]));
+
+    for (const taskId of [defaultWorkflowTask, ...selectedTasks]) {
+      expect((await store.getTask(taskId))?.column).toBe("in-progress");
+    }
+  });
+
   it("ignores stale workflowColumns=false and still releases held default-workflow cards", async () => {
     await store.updateGlobalSettings({ experimentalFeatures: { workflowColumns: false } });
     const id = await seedTodoCard();