diff --git a/loopx/control_plane/turn_driver/chat_queue_steering.ts b/loopx/control_plane/turn_driver/chat_queue_steering.ts
index 5ed1c4a2f3..f42fddb216 100644
--- a/loopx/control_plane/turn_driver/chat_queue_steering.ts
+++ b/loopx/control_plane/turn_driver/chat_queue_steering.ts
@@ -32,7 +32,7 @@ function mutation(value: unknown): JsonObject | null {
   if (value == null) return null;
   const row = requireJsonObject(value, "queue input receipt");
   requireNonEmptyString(row.operation_id, "queue input operation_id");
-  if (!["edit", "cancel"].includes(String(row.action)) ||
+  if ((row.action !== "edit" && row.action !== "cancel") ||
       !Number.isSafeInteger(row.expected_revision) || Number(row.expected_revision) < 0 ||
       row.input_revision !== Number(row.expected_revision) + 1 ||
       row.action === "edit" && typeof row.message !== "string") throw new Error("Invalid queue input receipt");
@@ -122,7 +122,7 @@ export function planQueuedChatMutation(input: JsonObject): JsonObject {
   const operationId = requireNonEmptyString(request.operation_id, "operation_id");
   if (operationId.length > 160 || !/^[A-Za-z0-9._-]+$/.test(operationId) ||
       !Number.isSafeInteger(request.expected_revision) || Number(request.expected_revision) < 0 ||
-      !["edit", "cancel"].includes(String(request.action)) ||
+      (request.action !== "edit" && request.action !== "cancel") ||
       Object.keys(request).some(key => !["operation_id", "expected_revision", "action", "message"].includes(key))) {
     throw new Error("Invalid queue input request");
   }
diff --git a/skills/loopx-self-repair/references/repair-patterns.md b/skills/loopx-self-repair/references/repair-patterns.md
index 30b23b6604..bd46fbdec4 100644
--- a/skills/loopx-self-repair/references/repair-patterns.md
+++ b/skills/loopx-self-repair/references/repair-patterns.md
@@ -5,6 +5,7 @@ teaches a reusable control-plane lesson.
 
 | Pattern | Symptoms | Evidence To Read | Likely Root | Durable Repair |
 | --- | --- | --- | --- | --- |
+| `queue_action_type_coercion` | A queued input action such as `["edit"]` is accepted but applies cancellation, or a stored operation accepts a non-string action. | Original JSON types, the typed planner and receipt decoder, real HTTP responses, canonical Turn/transcript/events/Session snapshots and native IO before/after refusal. | Membership checks stringify the action while effect selection and replay compare its original literal value. | Validate the original literal action at the existing owner before branching and when decoding pending or committed receipts. Cover arrays, nested arrays, objects, nulls, numbers, booleans and unknown strings; require rejection without state or native effects, then verify legal edit/cancel, original-operation replay and queue races. Preserve malformed historical evidence rather than coercing or rewriting receipts. |
 | `typed_adapter_validation_scope_mismatch` | A local adapter type check passes while the same CI entry reports a large legacy dependency error set. | Exact source revisions, configured roots, cold same-environment runs, installation/import paths, and original-root plus adapter counterfactuals. | Adding runtime adapters to a kernel root list expands its import closure; an extra source path can mask that traversal locally. | Preserve the existing kernel gate and its import behavior. Make the additive adapter boundary explicit, retain imported-code debt as unqualified, and prove strict root checking with original diagnostics and core/adapter mutations in an unmasked source installation. Do not globally disable import checks, remove original roots or rewrite historical failures as passes. |
 | `saved_projection_goal_route_coupling` | A saved context projection fails on conflicting default runtime roots even with native transport disabled, while the same capture remains readable. | Run the shipped projection and returned reader against one digest-bound synthetic capture, with implicit, missing and global registry selectors; retain digest/identity refusals and unchanged runtime snapshots. | Shared CLI registry discovery runs before the saved-view owner validates its source. | Classify the saved presentation at the existing CLI route owner; preserve machine-configuration routing, live authority conflict checks and source/session validation. Reuse the registry-independence integration tests rather than adding a second recovery path or repairing live state. |
 | `native_reader_program_route_loss` | A native producer or read uses a selected CLI or interpreter, but returned navigation, continuation or recovery invokes another runtime. | Actual lifecycle capture, generated first-read and recovery instructions, unchanged execution of emitted commands with an isolated competing program, complete source/digest readback and installed-package provenance. | A presentation layer used its generic command-renderer default after the caller had already selected the runtime. | Pass the current program argv through existing CLI, navigation, bounded-result and reader renderers; retain constructor defaults and shell quoting. Include emitted command metadata in native byte-cost estimates. Cover cold guard and saved-context projection before direct first reads, raw/selected/index pagination, quoted aliases, refusal details and source-state immutability through real CLI and isolated wheel entrypoints. Routing preserves the selected program; it does not pin an installation version or prove Host adoption. |
diff --git a/tests/control_plane_ts/chat_queue_steering.test.ts b/tests/control_plane_ts/chat_queue_steering.test.ts
index 871c93edc1..75d7ee327a 100644
--- a/tests/control_plane_ts/chat_queue_steering.test.ts
+++ b/tests/control_plane_ts/chat_queue_steering.test.ts
@@ -45,6 +45,21 @@ test("partial input writes exclude both FIFO and steering; exact retries finish
   assert.equal(planQueuedChatMutation({...f, turn: ended, request: {...request, expected_revision: 1}}).error_code, "queue_mutation_identity_conflict");
 });
 
+test("queue input actions are literal strings in requests and stored receipts", () => {
+  const f = facts();
+  const request = {action: "cancel", expected_revision: 0, operation_id: "strict-input"};
+  for (const action of [null, false, 0, {}, [], ["edit"], ["cancel"], [["edit"]], {toString: "edit"}, "unknown"]) {
+    assert.throws(() => planQueuedChatMutation({...f, request: {...request, action}}), /Invalid queue input request/);
+    const invalid = {...request, action, input_revision: 1};
+    assert.throws(() => selectQueuedChatTurns({turns: [{...f.turn, mutation: invalid}], include_reserved: true}),
+      /Invalid queue input receipt/);
+    for (const extra of [{mutation: invalid}, {operations: [invalid]}]) {
+      assert.throws(() => planQueuedChatMutation({...f, request, turn: {...f.turn, ...extra}}),
+        /Invalid queue input receipt/);
+    }
+  }
+});
+
 test("queued steering requires an unclaimed original and exact live target", () => {
   const f = facts(); assert.equal(planQueuedChatSteering(f).action, "dispatch");
   for (const status of ["starting", "running", "interrupting", "completed", "failed"]) {
diff --git a/tests/presentation/test_chat_turn_queue.py b/tests/presentation/test_chat_turn_queue.py
index 7545dccaaf..231a79f205 100644
--- a/tests/presentation/test_chat_turn_queue.py
+++ b/tests/presentation/test_chat_turn_queue.py
@@ -173,6 +173,21 @@ def test_goal_queue_input_http_with_canonical_goal_providers(ordinary, tmp_path,
     qid = queued["turn_id"]
     assert request(f"/api/chat/sessions/{sid}/queue")[0] == 200
     path = f"/api/chat/sessions/{sid}/queue/{qid}/input"
+    original_turn = store.load_turn(sid, qid)
+    original_messages = store.messages(sid)
+    original_events = store.events_after(sid, qid, None)
+    original_session = store.load_session(sid)
+    for index, action in enumerate([
+        None, False, 0, {}, [], ["edit"], ["cancel"], [["edit"]], {"toString": "edit"}, "unknown",
+    ]):
+        invalid = {"action": action, "operation_id": f"invalid-{index}", "expected_revision": 0}
+        response = request(path, invalid)
+        assert store.load_turn(sid, qid) == original_turn, response
+        assert store.messages(sid) == original_messages
+        assert store.events_after(sid, qid, None) == original_events
+        assert store.load_session(sid) == original_session
+        assert not capture.exists()
+        assert response[0] == 409, response
     assert request(path, queue_input_body())[0] == 200
     history = request(f"/api/chat/sessions/{sid}?turn_id={qid}&message_limit=200")[1]["messages"]
     assert history[0]["text"] == "Corrected queued input." and history[0]["queue_input_revision"] == 1