diff --git a/devlog/_plan/260827_bug_pr_merge_round/021_status_vs_created_at_asymmetry.md b/devlog/_plan/260827_bug_pr_merge_round/021_status_vs_created_at_asymmetry.md
new file mode 100644
index 0000000000..5fa4197b6e
--- /dev/null
+++ b/devlog/_plan/260827_bug_pr_merge_round/021_status_vs_created_at_asymmetry.md
@@ -0,0 +1,60 @@
+# The status/created_at split is narrower than it first looked
+
+The L3 pick for #2639 rests on a distinction: `status` is safe to backfill,
+`created_at` is not, because `created_at` breaks the byte-exact combo passthrough
+assertion. The reviewer auditing the cherry-pick asked the obvious follow-up — does
+`status` violate the same contract? — and the honest answer is **yes, it can**.
+
+## Evidence
+
+`tests/server-combo-failover-e2e.test.ts` builds its backup body with
+`responsesSuccess()` (line 216), which already sets `status: "completed"` on both the
+response and the message item. So the byte-exact assertion never exercises the
+`status` backfill — it passes because the field is already present.
+
+Remove that one field from the fixture and the same assertion fails on this branch:
+
+```
+$ cd /tmp/ocx-statusprobe   # fixture with the item's status: "completed" deleted
+$ bun test ./tests/server-combo-failover-e2e.test.ts -t 'exact backup response'
+(fail) ... returns the exact backup response
+  + "status": "completed",     # injected into a body relayed verbatim
+```
+
+And it passes with dev's version of the backfill file restored:
+
+```
+$ git checkout 2feffbdc3 -- src/server/responses/responses-field-backfill.ts
+$ bun test ./tests/server-combo-failover-e2e.test.ts -t 'exact backup response'
+ 1 pass, 0 fail
+```
+
+So the difference between the two halves is NOT that one mutates passthrough bodies
+and the other does not. Both do. `src/server/responses/core.ts:4145` runs
+`backfillResponsesFieldsJson` on the bounded-JSON answer, and line 3937 installs the
+SSE rewrite, on the passthrough path as well as the translated one.
+
+## What the difference actually is
+
+`created_at` fires on EVERY response body that lacks the field, and a relay that omits
+`created_at` is common. `status` fires only on a `message` item that lacks `status`,
+which is rarer and is a genuine spec violation upstream — `OutputMessage.status` is
+required, while a missing `created_at` is a Response-level omission the same decoders
+complain about. The blast radius differs by roughly an order of magnitude, and the
+existing test suite happens to sit on the safe side of the `status` case and the
+unsafe side of the `created_at` case.
+
+That is a defensible reason to take one and hold the other, but it is a difference of
+DEGREE, not of kind, and 002 overstated it as a clean line. Corrected here.
+
+## Consequence
+
+The open question in 002 — whether the backfill should be scoped to the translated
+path so a verbatim relay stays verbatim — now applies to `status` too, not only to
+`created_at`. Whoever resolves it should resolve both together. That is a follow-up
+for its own PABCD cycle, not something to bolt onto this cherry-pick: it changes
+behavior for every Responses provider, and the right answer probably involves the
+passthrough path opting out of field backfill entirely.
+
+Recorded rather than fixed here because this lane's contract is "take the correct
+part of a partially-right PR", and the `status` backfill IS what #2639 got right.
diff --git a/devlog/_plan/260827_bug_pr_merge_round/022_l3_audit.md b/devlog/_plan/260827_bug_pr_merge_round/022_l3_audit.md
new file mode 100644
index 0000000000..b0b9804e45
--- /dev/null
+++ b/devlog/_plan/260827_bug_pr_merge_round/022_l3_audit.md
@@ -0,0 +1,53 @@
+# L3 audit — reviewer findings and dispositions
+
+The independent reviewer audited `codex/l3-cherry-picks-260827` (PR #2721) and
+returned VERDICT: FAIL. Nine findings; four required code changes. All are fixed.
+
+| # | Finding | Disposition |
+|---|---|---|
+| 1 | `status` backfill correctly scoped to `type === "message"`, uses `"status" in item` so a falsy value is never overwritten | confirmed, no change |
+| 2 | `created_at` exclusion verified causally (73/74 before, 74/74 after) | confirmed |
+| 3 | The status/created_at split survives on FIXTURE CONTENTS, not on a principled difference | recorded in 021 |
+| 4 | **`response.queued` produced `completed`** — an unstarted message marked finished | fixed `6877f646f` |
+| 5 | **The regenerated fixture resurrected `stealth/ox-alpha`**, removed in `328931265` | fixed `45c3d31eb` |
+| 6 | **The self-correction justification is false** | fixed `ad8ab4f70` |
+| 7 | Dropping the PR's test file was right (it reintroduced both ox-alpha ids) | confirmed |
+| 8 | Split is clean; one stray ` *` comment line | fixed `8af9ff2bf` |
+| 9 | No status coverage lost by deleting the created_at tests; 148/148 at head | confirmed |
+
+## Finding 6 is the one worth remembering
+
+I wrote a provenance comment saying it was acceptable to record the reporter's
+unverified ladders BECAUSE `refreshCommandCodeReasoningEfforts()` would re-read the
+public profile and replace a wrong row after the first upstream rejection. I had read
+that function and it does exactly what I described — in the code.
+
+The reviewer ran it against the live site instead:
+
+```
+gpt-5.6-luna                          -> UNDEFINED
+google/gemini-3.7-flash               -> UNDEFINED
+deepseek/deepseek-v4-flash-vision-exp -> UNDEFINED
+```
+
+Confirmed independently: all three URLs return 200, and
+`grep -c -i 'reasoning efforts'` on the fetched HTML is 0. The pages ship the ladder
+inside a serialized React payload whose `reasoningEfforts` array is EMPTY in the
+delivered bytes. `parsedProfileEfforts` needs prose of the form
+"Reasoning efforts ... are supported;", finds none, returns undefined — so the row is
+never replaced. The same measurement returns 0 for `deepseek-v4-pro`, `GLM-5.3` and
+`muse-spark-1.2`, so the mechanism is dead for EVERY row in the table, not just the
+three added here.
+
+The lesson is narrow and worth stating: a safety net that exists in the code is not a
+safety net that functions. I cited a mechanism as the reason to accept unverified
+data without testing that the mechanism fires. The reviewer tested it.
+
+## Carried forward
+
+The dead parser is a real pre-existing defect: `parsedProfileEfforts` should read the
+embedded `reasoningEfforts` payload rather than prose. It is NOT fixed here — it
+affects every row, it is not what #2647 reported, and bolting it onto a cherry-pick
+lane would be exactly the scope creep this round is structured to avoid. It belongs
+in its own cycle, and the source comment now says so plainly so the next person does
+not re-derive the false justification.
diff --git a/src/providers/command-code-efforts.ts b/src/providers/command-code-efforts.ts
index b790c8779d..1cd4831662 100644
--- a/src/providers/command-code-efforts.ts
+++ b/src/providers/command-code-efforts.ts
@@ -9,6 +9,45 @@ const COMMAND_CODE_MODEL_EFFORTS = {
     efforts: ["high", "max"],
     profileUrl: "https://commandcode.ai/models/deepseek-v4-flash",
   },
+  /*
+   * Three live routes that reached the catalog without an effort ladder (#2647).
+   * Without a row here the model advertises no efforts at all, so a client that
+   * sends one gets it stripped or rejected rather than honored.
+   *
+   * PROVENANCE, stated plainly: these three ladders are the reporter's
+   * (darwintree, #2647), recorded as reported and NOT independently verified.
+   * All three profileUrls return HTTP 200, but commandcode.ai renders these
+   * pages client-side and ships the ladder inside a serialized React payload
+   * whose `reasoningEfforts` array is EMPTY in the delivered HTML. There is no
+   * fetchable statement of these ladders to check them against.
+   *
+   * Do not assume the refresh path launders this. It does not:
+   * `parsedProfileEfforts` below matches prose of the form
+   * "Reasoning efforts ... are supported;", and `grep -c -i 'reasoning efforts'`
+   * against the live pages returns 0 — for these three AND for the older rows
+   * (deepseek-v4-pro, GLM-5.3, muse-spark-1.2 all measured 0 on 2026-08-27).
+   * So `refreshCommandCodeReasoningEfforts` returns undefined and the caller
+   * keeps whatever is written here, indefinitely. The self-correction mechanism
+   * is currently dead for EVERY row in this table, which is a pre-existing
+   * defect worth its own fix (teach the parser to read the embedded payload),
+   * not something these three rows introduced.
+   *
+   * The practical consequence: a wrong ladder here stays wrong until a human
+   * changes it. It degrades safely — an effort the upstream rejects surfaces as
+   * an error rather than silent corruption — but it does not self-heal.
+   */
+  "deepseek/deepseek-v4-flash-vision-exp": {
+    efforts: ["high", "max"],
+    profileUrl: "https://commandcode.ai/models/deepseek-v4-flash-vision-exp",
+  },
+  "gpt-5.6-luna": {
+    efforts: ["low", "medium", "high", "xhigh", "max"],
+    profileUrl: "https://commandcode.ai/models/gpt-5-6-luna",
+  },
+  "google/gemini-3.7-flash": {
+    efforts: ["low", "medium", "high"],
+    profileUrl: "https://commandcode.ai/models/gemini-3-7-flash",
+  },
   // Keys must match the EXACT upstream /provider/v1/models ids (GLM ships as
   // `zai-org/GLM-5.3`, not `zai-org/glm-5.3`). The table doubles as the router's
   // known-ids decode source (via `knownModelIdsForProvider`), so a case mismatch
diff --git a/src/server/responses/responses-field-backfill.ts b/src/server/responses/responses-field-backfill.ts
index 48019670f2..ec9a34f273 100644
--- a/src/server/responses/responses-field-backfill.ts
+++ b/src/server/responses/responses-field-backfill.ts
@@ -91,6 +91,29 @@ function nextSyntheticItemSlot(): ItemIdSlot {
   return { kind: "fallback", ordinal: syntheticItemOrdinal };
 }
 
+/**
+ * Backfill `status` on a message output item if missing.
+ *
+ * The Responses API spec defines `status` as a required field on
+ * `OutputMessage`. Some upstream relays omit it, which causes strict
+ * deserializers (e.g. grok-build's serde types) to fail with
+ * `missing field 'status'`. Only message items carry this field in the
+ * Responses schema; reasoning, function_call, and other item types do not.
+ *
+ * The value is inferred from the event context: `output_item.added` and
+ * `response.created` / `response.in_progress` mean the message is still
+ * being generated (`in_progress`); `output_item.done` and
+ * `response.completed` / `response.incomplete` mean the message is
+ * finalized (`completed` / `incomplete` respectively).
+ *
+ * Returns the same object reference if no change is needed.
+ */
+function backfillItemStatus(item: Record<string, unknown>, inferredStatus: string): Record<string, unknown> {
+  if (item.type !== "message") return item;
+  if ("status" in item) return item;
+  return { ...item, status: inferredStatus };
+}
+
 /**
  * Backfill annotations: [] on an output_text content part if missing.
  * Returns the same object reference if no change is needed.
@@ -122,10 +145,10 @@ function backfillContentArray(content: unknown): unknown {
 
 /**
  * Walk an output item and backfill output_text parts in its content.
- * Also backfills a missing required id on the item itself.
+ * Also backfills a missing required id and status on the item itself.
  * Returns the same object reference if nothing changed.
  */
-function backfillOutputItem(item: unknown, slot: ItemIdSlot): unknown {
+function backfillOutputItem(item: unknown, slot: ItemIdSlot, inferredStatus: string): unknown {
   if (!isPlainObject(item)) return item;
   // The compact wire family is the `/v1/responses/compact` format, not a Responses output item.
   // Those items have no `id` in that contract, so synthesizing one changes a response body the
@@ -136,34 +159,92 @@ function backfillOutputItem(item: unknown, slot: ItemIdSlot): unknown {
   const content = item.content;
   const repaired = backfillContentArray(content);
   const withId = backfillItemId(item, slot);
-  if (repaired === content && withId === item) return item;
-  return { ...withId, ...(repaired === content ? {} : { content: repaired }) };
+  const withStatus = backfillItemStatus(withId, inferredStatus);
+  if (repaired === content && withStatus === item) return item;
+  return { ...withStatus, ...(repaired === content ? {} : { content: repaired }) };
 }
 
 /**
  * Walk a response object's output[] and backfill output_text parts.
+ *
+ * `inferredItemStatus` is the status to backfill on message items that lack
+ * one — derived from the event type so `output_item.added` / `response.created`
+ * gets `in_progress` while `output_item.done` / `response.completed` gets
+ * `completed`.
+ *
+ * Deliberately does NOT backfill `created_at`. #2639 proposed it for the same
+ * strict-decoder reason as `status`, but the proxy also relays some upstream
+ * responses verbatim, and `tests/server-combo-failover-e2e.test.ts` asserts a
+ * combo backup response is returned byte-exact. Injecting a field the upstream
+ * never sent breaks that contract. Both cannot hold for the same body, so the
+ * `created_at` half needs its own decision about which contract yields; it is
+ * not a detail to slip in beside `status`.
+ *
  * Returns the same object reference if nothing changed.
  */
-function backfillResponseOutput(response: unknown): unknown {
+function backfillResponseOutput(response: unknown, inferredItemStatus: string): unknown {
   if (!isPlainObject(response)) return response;
   const output = response.output;
   if (!Array.isArray(output)) return response;
   let changed = false;
   const repaired = output.map((item, idx) => {
     if (!isPlainObject(item)) return item;
-    const next = backfillOutputItem(item, { kind: "index", index: idx });
+    const next = backfillOutputItem(item, { kind: "index", index: idx }, inferredItemStatus);
     if (next !== item) changed = true;
     return next;
   });
   return changed ? { ...response, output: repaired } : response;
 }
 
+/**
+ * Infer the status to backfill on a message item from the event type.
+ *
+ * `output_item.added` means the item is still being generated (`in_progress`);
+ * `output_item.done` means it is finalized (`completed`). Response-level events
+ * infer from the response's own status field — which is authoritative when present.
+ * If the response status is also absent, the event type itself determines the phase:
+ * `response.created` / `response.in_progress` → `in_progress`,
+ * `response.completed` → `completed`, `response.incomplete` → `incomplete`.
+ */
+function inferredStatusForEventType(eventType: string): string {
+  if (eventType === "response.output_item.added") return "in_progress";
+  if (eventType === "response.output_item.done") return "completed";
+  if (eventType === "response.created" || eventType === "response.in_progress") return "in_progress";
+  // `queued` is a real Responses lifecycle status: the response exists but has not
+  // started generating. Without this row it falls through to the `completed`
+  // default below, which would mark an unstarted message as finished.
+  if (eventType === "response.queued") return "in_progress";
+  if (eventType === "response.incomplete" || eventType === "response.failed") return "incomplete";
+  return "completed";
+}
+
+/**
+ * Map a response-level lifecycle status to a valid OutputMessage status.
+ *
+ * `OutputMessage.status` accepts only `in_progress`, `completed`, or
+ * `incomplete`. Response-level statuses like `failed` or `cancelled` have no
+ * direct message-level equivalent, but `incomplete` is the correct semantic
+ * mapping: the message did not finish generating. Writing `completed` would
+ * assert something the upstream never claimed — a client branching on
+ * `status === "completed"` would treat a truncated message as whole.
+ */
+function messageStatusFromResponseStatus(status: string): string | null {
+  if (status === "in_progress" || status === "completed" || status === "incomplete") return status;
+  // A queued response has not begun generating, so its message items are
+  // in_progress — never completed. Returning null here would fall back to the
+  // event-type inference, whose default is `completed`.
+  if (status === "queued") return "in_progress";
+  if (status === "failed" || status === "cancelled") return "incomplete";
+  return null;
+}
+
 /**
  * Statelessly rewrite one SSE event: backfill annotations
  * on any output_text content part found in the event payload.
  */
 function rewriteEvent(event: Record<string, unknown>): Record<string, unknown> {
   const type = typeof event.type === "string" ? event.type : "";
+  const inferredItemStatus = inferredStatusForEventType(type);
   let next = event;
   let changed = false;
 
@@ -177,8 +258,8 @@ function rewriteEvent(event: Record<string, unknown>): Record<string, unknown> {
     // is not recoverable in that case, but a unique id is what strict decoders require, and a
     // well-formed stream still gets the stable index-derived id.
     const item = typeof rawIndex === "number" && Number.isInteger(rawIndex) && rawIndex >= 0
-      ? backfillOutputItem(event.item, { kind: "index", index: rawIndex })
-      : backfillOutputItem(event.item, nextSyntheticItemSlot());
+      ? backfillOutputItem(event.item, { kind: "index", index: rawIndex }, inferredItemStatus)
+      : backfillOutputItem(event.item, nextSyntheticItemSlot(), inferredItemStatus);
     if (item !== event.item) {
       next = { ...next, item };
       changed = true;
@@ -198,7 +279,13 @@ function rewriteEvent(event: Record<string, unknown>): Record<string, unknown> {
   // response.created / in_progress / completed / incomplete / failed:
   // response.output[].content[] -> output_text parts
   if (isPlainObject(event.response)) {
-    const response = backfillResponseOutput(event.response);
+    // For response-level events, prefer the response's own status when it is a valid
+    // OutputMessage status. Response lifecycle statuses like "failed" or "cancelled"
+    // have no message-level equivalent — fall back to the event-type inference instead.
+    const responseStatus = typeof event.response.status === "string"
+      ? messageStatusFromResponseStatus(event.response.status) ?? inferredItemStatus
+      : inferredItemStatus;
+    const response = backfillResponseOutput(event.response, responseStatus);
     if (response !== event.response) {
       next = { ...next, response };
       changed = true;
@@ -210,9 +297,9 @@ function rewriteEvent(event: Record<string, unknown>): Record<string, unknown> {
 
 /**
  * Create a stateless SSE block rewrite that backfills annotations and
- * on output_text content parts. Unconditional: the field is a required
- * canonical Responses field, so adding it when absent is safe for all
- * clients.
+ * message status on output_text content parts and message items.
+ * Unconditional: both are required canonical Responses fields, so adding
+ * them when absent is safe for all clients.
  */
 export function createResponsesFieldBackfillBlockRewrite(): SseBlockRewrite {
   const rewrite: SseBlockRewrite = (block: string): readonly string[] => {
@@ -245,7 +332,12 @@ export function backfillResponsesFieldsJson(payload: string): string {
     return payload;
   }
   if (!isPlainObject(response)) return payload;
-  const repaired = backfillResponseOutput(response);
+  // For a non-streaming response, derive the item status from the response's own
+  // status field when it is a valid OutputMessage status; fall back to "completed".
+  const inferredItemStatus = typeof response.status === "string"
+    ? messageStatusFromResponseStatus(response.status) ?? "completed"
+    : "completed";
+  const repaired = backfillResponseOutput(response, inferredItemStatus);
   if (repaired === response) return payload;
   return JSON.stringify(repaired);
 }
diff --git a/tests/command-code-provider.test.ts b/tests/command-code-provider.test.ts
index 9c5e02ed26..730d01638c 100644
--- a/tests/command-code-provider.test.ts
+++ b/tests/command-code-provider.test.ts
@@ -2,7 +2,11 @@ import { afterEach, describe, expect, test } from "bun:test";
 import { createCommandCodeAdapter } from "../src/adapters/command-code";
 import { loginCommandCode, parseCommandCodeCallback, shouldImportLocalCommandCodeAuth } from "../src/oauth/command-code";
 import { buildModelsRequest, OAUTH_PROVIDERS } from "../src/oauth";
-import { commandCodeReasoningEfforts, resetCommandCodeReasoningEffortsForTest } from "../src/providers/command-code-efforts";
+import {
+  commandCodeReasoningEfforts,
+  refreshCommandCodeReasoningEfforts,
+  resetCommandCodeReasoningEffortsForTest,
+} from "../src/providers/command-code-efforts";
 import { PROVIDER_REGISTRY } from "../src/providers/registry";
 import type { OcxParsedRequest, OcxProviderConfig } from "../src/types";
 import { createTestTranslatorBudget } from "./helpers/translator-budget";
@@ -464,6 +468,59 @@ describe("Command Code provider", () => {
     expect(JSON.parse(generated[1]!.body!).params).not.toHaveProperty("reasoning_effort");
   });
 
+  // Pins the profileUrl of each id added for #2647 — nothing more.
+  //
+  // Be clear about what this does NOT prove: the stubbed response below returns
+  // prose that commandcode.ai never actually emits, so a green run here is not
+  // evidence that a real profile page can be parsed. It cannot: the live pages
+  // carry no "Reasoning efforts ... are supported;" text at all (measured 0 for
+  // every row in the table on 2026-08-27), so the refresh path returns undefined
+  // in production. See the provenance note in command-code-efforts.ts.
+  //
+  // What it does catch is a typo'd or drifted profileUrl, which is worth pinning
+  // on its own: the URL is the only handle a future parser fix would have.
+  test("resolves the #2647 effort profiles to their canonical public URLs", async () => {
+    const urls: string[] = [];
+    const fetch = (async (url: string | URL | Request) => {
+      urls.push(String(url));
+      return new Response("Reasoning efforts high are supported; no other reasoning settings.");
+    }) as typeof globalThis.fetch;
+
+    await refreshCommandCodeReasoningEfforts("gpt-5.6-luna", fetch);
+    await refreshCommandCodeReasoningEfforts("google/gemini-3.7-flash", fetch);
+    await refreshCommandCodeReasoningEfforts("deepseek/deepseek-v4-flash-vision-exp", fetch);
+
+    expect(urls).toEqual([
+      "https://commandcode.ai/models/gpt-5-6-luna",
+      "https://commandcode.ai/models/gemini-3-7-flash",
+      "https://commandcode.ai/models/deepseek-v4-flash-vision-exp",
+    ]);
+  });
+
+  // Pins the CURRENT, BROKEN state of the profile-refresh path so nobody re-derives
+  // the false justification that a wrong ladder self-corrects.
+  //
+  // commandcode.ai serves these profiles as a React flight payload. The ladder key
+  // is present but its array is empty in the delivered bytes
+  // (`reasoningEfforts\",[]` — measured on 2026-08-27 for gpt-5.6-luna, glm-5-3 and
+  // deepseek-v4-pro alike), and there is no "Reasoning efforts ... are supported;"
+  // prose anywhere on the page. So parsedProfileEfforts finds nothing and the row
+  // is never replaced.
+  //
+  // When someone teaches the parser to read a real payload, this test SHOULD fail.
+  // That failure is the signal to delete it and update the provenance note in
+  // command-code-efforts.ts, which currently tells the reader this net does not work.
+  test("a real profile page shape yields no efforts, so the row is not self-correcting", async () => {
+    const flightPayload = 'self.__next_f.push([1,"...\\"reasoningEfforts\\",[],\\"inputCost\\",0,\\"minPlanName\\",\\"Go\\"..."])';
+    const fetch = (async () => new Response(flightPayload)) as typeof globalThis.fetch;
+
+    const refreshed = await refreshCommandCodeReasoningEfforts("gpt-5.6-luna", fetch);
+
+    expect(refreshed).toBeUndefined();
+    // And the table value survives untouched, which is the safe half of the failure.
+    expect(commandCodeReasoningEfforts("gpt-5.6-luna")).toEqual(["low", "medium", "high", "xhigh", "max"]);
+  });
+
   test("omits effort when the caller did not choose one", async () => {
     const built = await builtRequest({ ...parsed("claude-haiku-4-5"), options: { maxOutputTokens: 100 } });
     expect(JSON.parse(built.body).params).not.toHaveProperty("reasoning_effort");
diff --git a/tests/commandcode-provider.test.ts b/tests/commandcode-provider.test.ts
index bb358bf444..b6d27a0366 100644
--- a/tests/commandcode-provider.test.ts
+++ b/tests/commandcode-provider.test.ts
@@ -68,6 +68,11 @@ describe("Command Code provider", () => {
       defaultModel: "deepseek/deepseek-v4-flash",
       apiKeyValidation: "unknown",
       reasoningEfforts: [],
+      modelReasoningEfforts: {
+        "deepseek/deepseek-v4-flash-vision-exp": ["high", "max"],
+        "gpt-5.6-luna": ["low", "medium", "high", "xhigh", "max"],
+        "google/gemini-3.7-flash": ["low", "medium", "high"],
+      },
       modelDiscovery: {
         path: "models",
         maxResponseBytes: 256 * 1024,
@@ -183,8 +188,14 @@ describe("Command Code provider", () => {
 
     const config = withStubbedProviderFetch(commandcodeConfig());
     const models = (await gatherRoutedModels(config)).filter(row => row.provider === "commandcode");
-    // Full public catalog snapshot: 51 rows, including the free-tier entries.
-    expect(models).toHaveLength(51);
+    // Full authenticated catalog snapshot: 59 rows, including the free-tier entries.
+    //
+    // #2647's fixture carried 60 because it predates 328931265, which removed Ox Alpha
+    // entirely — both ids, the Zen slug for the same stealth model, the context
+    // constant, the effort profile, and the OpenRouter entry. That stealth window has
+    // closed, so `stealth/ox-alpha` is dropped from the snapshot rather than being
+    // silently resurrected by a regenerated fixture.
+    expect(models).toHaveLength(59);
     expect(models.map(row => row.id)).toContain("deepseek/deepseek-v4-flash");
     expect(models.map(row => row.id)).toContain("moonshotai/Kimi-K2.7-Code");
     expect(models.map(row => row.id)).toContain("poolside/laguna-s-2.1-free");
@@ -202,6 +213,20 @@ describe("Command Code provider", () => {
     const sol = models.find(row => row.id === "gpt-5.6-sol")!;
     expect(sol.contextWindow).toBe(1_050_000);
 
+    expect(models.find(row => row.id === "deepseek/deepseek-v4-flash-vision-exp"))
+      .toMatchObject({
+        id: "deepseek/deepseek-v4-flash-vision-exp",
+        reasoningEfforts: ["high", "max"],
+      });
+    expect(models.find(row => row.id === "gpt-5.6-luna")).toMatchObject({
+      id: "gpt-5.6-luna",
+      reasoningEfforts: ["low", "medium", "high", "xhigh", "max"],
+    });
+    expect(models.find(row => row.id === "google/gemini-3.7-flash")).toMatchObject({
+      id: "google/gemini-3.7-flash",
+      reasoningEfforts: ["low", "medium", "high"],
+    });
+
     expect(routedSlug("commandcode", deepseek.id)).toBe("commandcode/deepseek-deepseek-v4-flash");
     expect(routeModel(config, "commandcode/deepseek/deepseek-v4-flash").modelId)
       .toBe("deepseek/deepseek-v4-flash");
diff --git a/tests/fixtures/commandcode-models.json b/tests/fixtures/commandcode-models.json
index 06b9741358..47a5eca5ab 100644
--- a/tests/fixtures/commandcode-models.json
+++ b/tests/fixtures/commandcode-models.json
@@ -1 +1 @@
-{"object":"list","data":[{"id":"claude-sonnet-5","object":"model","created":1785728568,"owned_by":"command-code","name":"Claude Sonnet 5","context_length":1000000},{"id":"claude-sonnet-4-6","object":"model","created":1785728568,"owned_by":"command-code","name":"Claude Sonnet 4.6","context_length":1000000},{"id":"claude-fable-5","object":"model","created":1785728568,"owned_by":"command-code","name":"Claude Fable 5","context_length":1000000},{"id":"claude-opus-5","object":"model","created":1785728568,"owned_by":"command-code","name":"Claude Opus 5","context_length":1000000},{"id":"claude-opus-4-8","object":"model","created":1785728568,"owned_by":"command-code","name":"Claude Opus 4.8","context_length":1000000},{"id":"claude-opus-4-7","object":"model","created":1785728568,"owned_by":"command-code","name":"Claude Opus 4.7","context_length":1000000},{"id":"claude-haiku-4-5-20251001","object":"model","created":1785728568,"owned_by":"command-code","name":"Claude Haiku 4.5","context_length":200000},{"id":"gpt-5.6-sol","object":"model","created":1785728568,"owned_by":"command-code","name":"GPT-5.6 Sol","context_length":1050000},{"id":"gpt-5.6-terra","object":"model","created":1785728568,"owned_by":"command-code","name":"GPT-5.6 Terra","context_length":1050000},{"id":"gpt-5.6-luna","object":"model","created":1785728568,"owned_by":"command-code","name":"GPT-5.6 Luna","context_length":1050000},{"id":"gpt-5.5","object":"model","created":1785728568,"owned_by":"command-code","name":"GPT-5.5","context_length":200000},{"id":"gpt-5.4","object":"model","created":1785728568,"owned_by":"command-code","name":"GPT-5.4","context_length":400000},{"id":"gpt-5.3-codex","object":"model","created":1785728568,"owned_by":"command-code","name":"GPT-5.3 Codex","context_length":400000},{"id":"gpt-5.4-mini","object":"model","created":1785728568,"owned_by":"command-code","name":"GPT-5.4 Mini","context_length":400000},{"id":"deepseek/deepseek-v4-pro","object":"model","created":1785728568,"owned_by":"command-code","name":"DeepSeek V4 Pro","context_length":1000000},{"id":"deepseek/deepseek-v4-flash","object":"model","created":1785728568,"owned_by":"command-code","name":"DeepSeek V4 Flash","context_length":1000000},{"id":"moonshotai/Kimi-K3","object":"model","created":1785728568,"owned_by":"command-code","name":"Kimi K3","context_length":1000000},{"id":"moonshotai/Kimi-K2.7-Code","object":"model","created":1785728568,"owned_by":"command-code","name":"Kimi K2.7 Code","context_length":256000},{"id":"moonshotai/Kimi-K2.7-Code-Highspeed","object":"model","created":1785728568,"owned_by":"command-code","name":"Kimi K2.7 Code HighSpeed","context_length":262000},{"id":"moonshotai/Kimi-K2.6","object":"model","created":1785728568,"owned_by":"command-code","name":"Kimi K2.6","context_length":256000},{"id":"moonshotai/Kimi-K2.5","object":"model","created":1785728568,"owned_by":"command-code","name":"Kimi K2.5","context_length":256000},{"id":"zai-org/GLM-5.2","object":"model","created":1785728568,"owned_by":"command-code","name":"GLM-5.2","context_length":1000000},{"id":"zai-org/GLM-5.2-Fast","object":"model","created":1785728568,"owned_by":"command-code","name":"GLM-5.2 Fast","context_length":1000000},{"id":"zai-org/GLM-5.1","object":"model","created":1785728568,"owned_by":"command-code","name":"GLM-5.1","context_length":200000},{"id":"zai-org/GLM-5","object":"model","created":1785728568,"owned_by":"command-code","name":"GLM-5","context_length":200000},{"id":"MiniMaxAI/MiniMax-M3","object":"model","created":1785728568,"owned_by":"command-code","name":"MiniMax M3","context_length":1000000},{"id":"MiniMaxAI/MiniMax-M2.7","object":"model","created":1785728568,"owned_by":"command-code","name":"MiniMax M2.7","context_length":200000},{"id":"MiniMaxAI/MiniMax-M2.5","object":"model","created":1785728568,"owned_by":"command-code","name":"MiniMax M2.5","context_length":200000},{"id":"xiaomi/mimo-v2.5-pro","object":"model","created":1785728568,"owned_by":"command-code","name":"MiMo V2.5 Pro","context_length":1000000},{"id":"xiaomi/mimo-v2.5","object":"model","created":1785728568,"owned_by":"command-code","name":"MiMo V2.5","context_length":1000000},{"id":"Qwen/Qwen3.6-Max-Preview","object":"model","created":1785728568,"owned_by":"command-code","name":"Qwen 3.6 Max Preview","context_length":200000},{"id":"Qwen/Qwen3.6-Plus","object":"model","created":1785728568,"owned_by":"command-code","name":"Qwen 3.6 Plus","context_length":200000},{"id":"Qwen/Qwen3.7-Max","object":"model","created":1785728568,"owned_by":"command-code","name":"Qwen 3.7 Max","context_length":1000000},{"id":"Qwen/Qwen3.7-Plus","object":"model","created":1785728568,"owned_by":"command-code","name":"Qwen 3.7 Plus","context_length":1000000},{"id":"Qwen/Qwen3.7-Flash","object":"model","created":1785728568,"owned_by":"command-code","name":"Qwen 3.7 Flash","context_length":1000000},{"id":"Qwen/Qwen3.8-Max","object":"model","created":1785728568,"owned_by":"command-code","name":"Qwen 3.8 Max","context_length":1000000},{"id":"stepfun/Step-3.7-Flash","object":"model","created":1785728568,"owned_by":"command-code","name":"Step 3.7 Flash","context_length":256000},{"id":"stepfun/Step-3.5-Flash","object":"model","created":1785728568,"owned_by":"command-code","name":"Step 3.5 Flash","context_length":1000000},{"id":"tencent/hy3-paid","object":"model","created":1785728568,"owned_by":"command-code","name":"Tencent Hy3","context_length":262144},{"id":"google/gemini-3.6-flash","object":"model","created":1785728568,"owned_by":"command-code","name":"Gemini 3.6 Flash","context_length":1000000},{"id":"google/gemini-3.5-flash","object":"model","created":1785728568,"owned_by":"command-code","name":"Gemini 3.5 Flash","context_length":1000000},{"id":"google/gemini-3.5-flash-lite","object":"model","created":1785728568,"owned_by":"command-code","name":"Gemini 3.5 Flash Lite","context_length":1000000},{"id":"google/gemini-3.1-flash-lite","object":"model","created":1785728568,"owned_by":"command-code","name":"Gemini 3.1 Flash Lite","context_length":1000000},{"id":"sakana/fugu-ultra","object":"model","created":1785728568,"owned_by":"command-code","name":"Fugu Ultra","context_length":1000000},{"id":"nvidia/nemotron-3-ultra-550b-a55b","object":"model","created":1785728568,"owned_by":"command-code","name":"Nemotron 3 Ultra","context_length":1000000},{"id":"thinkingmachines/inkling","object":"model","created":1785728568,"owned_by":"command-code","name":"Inkling","context_length":256000},{"id":"thinkingmachines/inkling-small","object":"model","created":1785728568,"owned_by":"command-code","name":"Inkling Small","context_length":1000000},{"id":"poolside/laguna-s-2.1-free","object":"model","created":1785728568,"owned_by":"command-code","name":"Laguna S 2.1","context_length":256000},{"id":"inclusionai/ling-3.0-flash-free","object":"model","created":1785728568,"owned_by":"command-code","name":"Ling 3.0 Flash","context_length":256000},{"id":"meta/muse-spark-1.1","object":"model","created":1785728568,"owned_by":"command-code","name":"Muse Spark 1.1","context_length":1048576},{"id":"xai/grok-4.5","object":"model","created":1785728568,"owned_by":"command-code","name":"Grok 4.5","context_length":500000}]}
\ No newline at end of file
+{"object":"list","data":[{"id":"claude-sonnet-5","object":"model","created":1787739133,"owned_by":"command-code","name":"Claude Sonnet 5","context_length":1000000},{"id":"claude-sonnet-4-6","object":"model","created":1787739133,"owned_by":"command-code","name":"Claude Sonnet 4.6","context_length":1000000},{"id":"claude-fable-5","object":"model","created":1787739133,"owned_by":"command-code","name":"Claude Fable 5","context_length":1000000},{"id":"claude-opus-5","object":"model","created":1787739133,"owned_by":"command-code","name":"Claude Opus 5","context_length":1000000},{"id":"claude-opus-4-8","object":"model","created":1787739133,"owned_by":"command-code","name":"Claude Opus 4.8","context_length":1000000},{"id":"claude-opus-4-7","object":"model","created":1787739133,"owned_by":"command-code","name":"Claude Opus 4.7","context_length":1000000},{"id":"claude-haiku-4-5-20251001","object":"model","created":1787739133,"owned_by":"command-code","name":"Claude Haiku 4.5","context_length":200000},{"id":"gpt-5.6-sol","object":"model","created":1787739133,"owned_by":"command-code","name":"GPT-5.6 Sol","context_length":1050000},{"id":"gpt-5.6-terra","object":"model","created":1787739133,"owned_by":"command-code","name":"GPT-5.6 Terra","context_length":1050000},{"id":"gpt-5.6-luna","object":"model","created":1787739133,"owned_by":"command-code","name":"GPT-5.6 Luna","context_length":1050000},{"id":"gpt-5.5","object":"model","created":1787739133,"owned_by":"command-code","name":"GPT-5.5","context_length":400000},{"id":"gpt-5.4","object":"model","created":1787739133,"owned_by":"command-code","name":"GPT-5.4","context_length":400000},{"id":"gpt-5.3-codex","object":"model","created":1787739133,"owned_by":"command-code","name":"GPT-5.3 Codex","context_length":400000},{"id":"gpt-5.4-mini","object":"model","created":1787739133,"owned_by":"command-code","name":"GPT-5.4 Mini","context_length":400000},{"id":"deepseek/deepseek-v4-pro","object":"model","created":1787739133,"owned_by":"command-code","name":"DeepSeek V4 Pro (latest)","context_length":1000000},{"id":"deepseek/deepseek-v4-flash","object":"model","created":1787739133,"owned_by":"command-code","name":"DeepSeek V4 Flash (latest)","context_length":1000000},{"id":"deepseek/deepseek-v4-flash-vision-exp","object":"model","created":1787739133,"owned_by":"command-code","name":"DeepSeek V4 Flash Vision (exp)","context_length":1000000},{"id":"moonshotai/Kimi-K3","object":"model","created":1787739133,"owned_by":"command-code","name":"Kimi K3","context_length":1000000},{"id":"moonshotai/Kimi-K2.7-Code","object":"model","created":1787739133,"owned_by":"command-code","name":"Kimi K2.7 Code","context_length":256000},{"id":"moonshotai/Kimi-K2.7-Code-Highspeed","object":"model","created":1787739133,"owned_by":"command-code","name":"Kimi K2.7 Code HighSpeed","context_length":262000},{"id":"moonshotai/Kimi-K2.6","object":"model","created":1787739133,"owned_by":"command-code","name":"Kimi K2.6","context_length":256000},{"id":"moonshotai/Kimi-K2.5","object":"model","created":1787739133,"owned_by":"command-code","name":"Kimi K2.5","context_length":256000},{"id":"zai-org/GLM-5.3","object":"model","created":1787739133,"owned_by":"command-code","name":"GLM-5.3","context_length":1000000},{"id":"zai-org/GLM-5.2","object":"model","created":1787739133,"owned_by":"command-code","name":"GLM-5.2","context_length":1000000},{"id":"zai-org/GLM-5.2-Fast","object":"model","created":1787739133,"owned_by":"command-code","name":"GLM-5.2 Fast","context_length":1000000},{"id":"zai-org/GLM-5.1","object":"model","created":1787739133,"owned_by":"command-code","name":"GLM-5.1","context_length":200000},{"id":"zai-org/GLM-5","object":"model","created":1787739133,"owned_by":"command-code","name":"GLM-5","context_length":200000},{"id":"MiniMaxAI/MiniMax-M3","object":"model","created":1787739133,"owned_by":"command-code","name":"MiniMax M3","context_length":1000000},{"id":"MiniMaxAI/MiniMax-M2.7","object":"model","created":1787739133,"owned_by":"command-code","name":"MiniMax M2.7","context_length":200000},{"id":"minimax/minimax-m3-free","object":"model","created":1787739133,"owned_by":"command-code","name":"MiniMax M3","context_length":1000000},{"id":"minimax/minimax-m2.7-free","object":"model","created":1787739133,"owned_by":"command-code","name":"MiniMax M2.7","context_length":197000},{"id":"MiniMaxAI/MiniMax-M2.5","object":"model","created":1787739133,"owned_by":"command-code","name":"MiniMax M2.5","context_length":200000},{"id":"xiaomi/mimo-v2.5-pro","object":"model","created":1787739133,"owned_by":"command-code","name":"MiMo V2.5 Pro","context_length":1000000},{"id":"xiaomi/mimo-v2.5","object":"model","created":1787739133,"owned_by":"command-code","name":"MiMo V2.5","context_length":1000000},{"id":"Qwen/Qwen3.8-Max","object":"model","created":1787739133,"owned_by":"command-code","name":"Qwen 3.8 Max","context_length":1000000},{"id":"Qwen/Qwen3.8-27B","object":"model","created":1787739133,"owned_by":"command-code","name":"Qwen 3.8 27B","context_length":262144},{"id":"Qwen/Qwen3.7-Max","object":"model","created":1787739133,"owned_by":"command-code","name":"Qwen 3.7 Max","context_length":1000000},{"id":"Qwen/Qwen3.7-Plus","object":"model","created":1787739133,"owned_by":"command-code","name":"Qwen 3.7 Plus","context_length":1000000},{"id":"Qwen/Qwen3.7-Flash","object":"model","created":1787739133,"owned_by":"command-code","name":"Qwen 3.7 Flash","context_length":1000000},{"id":"Qwen/Qwen3.6-Max-Preview","object":"model","created":1787739133,"owned_by":"command-code","name":"Qwen 3.6 Max Preview","context_length":200000},{"id":"Qwen/Qwen3.6-Plus","object":"model","created":1787739133,"owned_by":"command-code","name":"Qwen 3.6 Plus","context_length":200000},{"id":"stepfun/Step-3.7-Flash","object":"model","created":1787739133,"owned_by":"command-code","name":"Step 3.7 Flash","context_length":256000},{"id":"stepfun/Step-3.5-Flash","object":"model","created":1787739133,"owned_by":"command-code","name":"Step 3.5 Flash","context_length":1000000},{"id":"tencent/hy3-paid","object":"model","created":1787739133,"owned_by":"command-code","name":"Tencent Hy3","context_length":262144},{"id":"google/gemini-3.7-flash","object":"model","created":1787739133,"owned_by":"command-code","name":"Gemini 3.7 Flash","context_length":1048576},{"id":"google/gemini-3.6-flash","object":"model","created":1787739133,"owned_by":"command-code","name":"Gemini 3.6 Flash","context_length":1000000},{"id":"google/gemini-3.5-flash","object":"model","created":1787739133,"owned_by":"command-code","name":"Gemini 3.5 Flash","context_length":1000000},{"id":"google/gemini-3.5-flash-lite","object":"model","created":1787739133,"owned_by":"command-code","name":"Gemini 3.5 Flash Lite","context_length":1000000},{"id":"google/gemini-3.1-flash-lite","object":"model","created":1787739133,"owned_by":"command-code","name":"Gemini 3.1 Flash Lite","context_length":1000000},{"id":"sakana/fugu-ultra","object":"model","created":1787739133,"owned_by":"command-code","name":"Fugu Ultra","context_length":1000000},{"id":"nvidia/nemotron-3-ultra-550b-a55b","object":"model","created":1787739133,"owned_by":"command-code","name":"Nemotron 3 Ultra","context_length":1000000},{"id":"thinkingmachines/inkling","object":"model","created":1787739133,"owned_by":"command-code","name":"Inkling","context_length":256000},{"id":"thinkingmachines/inkling-small","object":"model","created":1787739133,"owned_by":"command-code","name":"Inkling Small","context_length":1000000},{"id":"poolside/laguna-s-2.1-free","object":"model","created":1787739133,"owned_by":"command-code","name":"Laguna S 2.1","context_length":256000},{"id":"meta/muse-spark-1.1","object":"model","created":1787739133,"owned_by":"command-code","name":"Muse Spark 1.1","context_length":1048576},{"id":"meta/muse-spark-1.2","object":"model","created":1787739133,"owned_by":"command-code","name":"Muse Spark 1.2","context_length":1048576},{"id":"meta/muse-spark-1.2-contributor","object":"model","created":1787739133,"owned_by":"command-code","name":"Muse Spark 1.2 Contributor","context_length":1048576},{"id":"xai/grok-4.5","object":"model","created":1787739133,"owned_by":"command-code","name":"Grok 4.5","context_length":500000},{"id":"xai/grok-4.6","object":"model","created":1787739133,"owned_by":"command-code","name":"Grok 4.6","context_length":500000}]}
diff --git a/tests/responses-field-backfill.test.ts b/tests/responses-field-backfill.test.ts
index c5ec73e690..8e7f33666d 100644
--- a/tests/responses-field-backfill.test.ts
+++ b/tests/responses-field-backfill.test.ts
@@ -350,6 +350,285 @@ describe("responses-field-backfill", () => {
     expect(result.output[0].id).toBe("msg_real");
   });
 
+  test("backfills missing status on output_item.done message", () => {
+    const event = {
+      type: "response.output_item.done",
+      output_index: 0,
+      item: {
+        type: "message",
+        id: "msg_1",
+        role: "assistant",
+        content: [{ type: "output_text", text: "hi" }],
+      },
+    };
+    const [out] = apply(sseBlock(event));
+    const parsed = parseData([out])[0];
+    expect(parsed.item.status).toBe("completed");
+  });
+
+  test("preserves existing status on message items", () => {
+    const event = {
+      type: "response.output_item.done",
+      output_index: 0,
+      item: {
+        type: "message",
+        id: "msg_1",
+        role: "assistant",
+        status: "in_progress",
+        content: [{ type: "output_text", text: "hi" }],
+      },
+    };
+    const [out] = apply(sseBlock(event));
+    const parsed = parseData([out])[0];
+    expect(parsed.item.status).toBe("in_progress");
+  });
+
+  test("backfills missing status on response.completed output items", () => {
+    const event = {
+      type: "response.completed",
+      sequence_number: 42,
+      response: {
+        id: "resp_1",
+        object: "response",
+        status: "completed",
+        output: [
+          {
+            type: "message",
+            id: "msg_1",
+            role: "assistant",
+            content: [{ type: "output_text", text: "hello" }],
+          },
+        ],
+      },
+    };
+    const [out] = apply(sseBlock(event));
+    const parsed = parseData([out])[0];
+    expect(parsed.response.output[0].status).toBe("completed");
+  });
+
+  test("does not add status to non-message items", () => {
+    const event = {
+      type: "response.output_item.done",
+      output_index: 0,
+      item: {
+        type: "function_call",
+        id: "fc_1",
+        call_id: "call_1",
+        name: "do_thing",
+        arguments: "{}",
+      },
+    };
+    const [out] = apply(sseBlock(event));
+    const parsed = parseData([out])[0];
+    expect(parsed.item).not.toHaveProperty("status");
+  });
+
+  test("backfillResponsesFieldsJson backfills missing status on message items", () => {
+    const response = {
+      id: "resp_1",
+      object: "response",
+      status: "completed",
+      output: [
+        {
+          type: "message",
+          id: "msg_1",
+          role: "assistant",
+          content: [{ type: "output_text", text: "hello" }],
+        },
+      ],
+    };
+    const result = JSON.parse(backfillResponsesFieldsJson(JSON.stringify(response))) as typeof response;
+    expect(result.output[0].status).toBe("completed");
+  });
+
+  // `queued` is a real Responses lifecycle status: the response exists but has not
+  // started generating. It is neither a valid OutputMessage status nor covered by the
+  // event-type table, so before these cases it fell through to the `completed`
+  // default — marking an unstarted message as finished, which is exactly the
+  // overclaim messageStatusFromResponseStatus exists to prevent.
+  test("a queued response marks its message items in_progress, not completed", () => {
+    const event = {
+      type: "response.queued",
+      sequence_number: 1,
+      response: {
+        id: "resp_1",
+        object: "response",
+        status: "queued",
+        model: "grok-4.5",
+        output: [
+          {
+            type: "message",
+            id: "msg_1",
+            role: "assistant",
+            content: [{ type: "output_text", text: "" }],
+          },
+        ],
+      },
+    };
+    const [out] = apply(sseBlock(event));
+    const parsed = parseData([out])[0];
+    expect(parsed.response.output[0].status).toBe("in_progress");
+  });
+
+  test("backfillResponsesFieldsJson treats a queued response as in_progress", () => {
+    const response = {
+      id: "resp_1",
+      object: "response",
+      status: "queued",
+      output: [
+        {
+          type: "message",
+          id: "msg_1",
+          role: "assistant",
+          content: [{ type: "output_text", text: "" }],
+        },
+      ],
+    };
+    const result = JSON.parse(backfillResponsesFieldsJson(JSON.stringify(response))) as {
+      output: { status?: string }[];
+    };
+    expect(result.output[0].status).toBe("in_progress");
+  });
+
+  test("backfillResponsesFieldsJson derives incomplete status on message items", () => {
+    const response = {
+      id: "resp_1",
+      object: "response",
+      status: "incomplete",
+      output: [
+        {
+          type: "message",
+          id: "msg_1",
+          role: "assistant",
+          content: [{ type: "output_text", text: "partial" }],
+        },
+      ],
+    };
+    const result = JSON.parse(backfillResponsesFieldsJson(JSON.stringify(response))) as typeof response;
+    expect(result.output[0].status).toBe("incomplete");
+  });
+
+  test("backfills in_progress status on output_item.added message", () => {
+    const event = {
+      type: "response.output_item.added",
+      output_index: 0,
+      item: {
+        type: "message",
+        id: "msg_1",
+        role: "assistant",
+        content: [{ type: "output_text", text: "" }],
+      },
+    };
+    const [out] = apply(sseBlock(event));
+    const parsed = parseData([out])[0];
+    // output_item.added means the item is still being generated; marking it "completed"
+    // would misrepresent the stream state to strict clients.
+    expect(parsed.item.status).toBe("in_progress");
+  });
+
+  test("backfills in_progress status on response.created output items", () => {
+    const event = {
+      type: "response.created",
+      sequence_number: 1,
+      response: {
+        id: "resp_1",
+        object: "response",
+        status: "in_progress",
+        model: "grok-4.5",
+        output: [
+          {
+            type: "message",
+            id: "msg_1",
+            role: "assistant",
+            content: [{ type: "output_text", text: "" }],
+          },
+        ],
+      },
+    };
+    const [out] = apply(sseBlock(event));
+    const parsed = parseData([out])[0];
+    expect(parsed.response.output[0].status).toBe("in_progress");
+  });
+
+  test("backfills in_progress when both response status and item status are absent", () => {
+    // response.created with no status on either the response or the message item:
+    // the event type alone must drive the inference, not a "completed" default.
+    const event = {
+      type: "response.created",
+      sequence_number: 1,
+      response: {
+        id: "resp_1",
+        object: "response",
+        model: "grok-4.5",
+        output: [
+          {
+            type: "message",
+            id: "msg_1",
+            role: "assistant",
+            content: [{ type: "output_text", text: "" }],
+          },
+        ],
+      },
+    };
+    const [out] = apply(sseBlock(event));
+    const parsed = parseData([out])[0];
+    expect(parsed.response.output[0].status).toBe("in_progress");
+  });
+
+  test("backfills incomplete status on response.incomplete output items", () => {
+    const event = {
+      type: "response.incomplete",
+      sequence_number: 10,
+      response: {
+        id: "resp_1",
+        object: "response",
+        status: "incomplete",
+        model: "grok-4.5",
+        output: [
+          {
+            type: "message",
+            id: "msg_1",
+            role: "assistant",
+            content: [{ type: "output_text", text: "partial" }],
+          },
+        ],
+      },
+    };
+    const [out] = apply(sseBlock(event));
+    const parsed = parseData([out])[0];
+    expect(parsed.response.output[0].status).toBe("incomplete");
+  });
+
+  test("maps response.failed to incomplete message status", () => {
+    // response.failed carries status: "failed" on the response object, but
+    // OutputMessage.status only accepts in_progress/completed/incomplete.
+    // "failed" means the message did not finish generating, so "incomplete"
+    // is the correct semantic mapping — not "completed", which would falsely
+    // claim the message is whole.
+    const event = {
+      type: "response.failed",
+      sequence_number: 5,
+      response: {
+        id: "resp_1",
+        object: "response",
+        status: "failed",
+        model: "grok-4.5",
+        output: [
+          {
+            type: "message",
+            id: "msg_1",
+            role: "assistant",
+            content: [{ type: "output_text", text: "partial" }],
+          },
+        ],
+      },
+    };
+    const [out] = apply(sseBlock(event));
+    const parsed = parseData([out])[0];
+    expect(parsed.response.output[0].status).toBe("incomplete");
+  });
+
+
   test("the canonical image_generation_call type gets its own prefix", () => {
     const response = {
       id: "resp_1",