@@ -0,0 +1,18 @@
+---
+'@objectstack/spec': patch
+'@objectstack/platform-objects': patch
+'@object-ui/app-shell': patch
+'@object-ui/i18n': patch
+---
+
+feat(app-shell): a key-only record control, and the Studio hook form offers `refusals` with it
+
+Clause-②: no
+Metadata-protocol: none
+
+A hook built in Studio can now declare its refusal catalogue. The hook form shows a **Refusals** row beside the body: add a code, write the message the user reads and an optional 4xx status, rename or remove a code. The saved body is exactly `refusals: { CODE: { message, status? } }`, the shape `HookSchema` accepts, so a hook made in Studio no longer has to be edited as code to refuse in translatable text.
+
+- **`@object-ui/app-shell`.** The metadata form's `record` editor gains a key-only face. A `type: 'record'` row that declares `widget: 'key-only-record'` edits a map of closed entries (add, rename, remove, reorder, edit each entry's fields) and never writes the key into the entry. A key is checked against the record's served key rule (`propertyNames.pattern`, derived from the spec), so a code like `clean_version` is refused before it reaches the draft. A rename moves the entry in place once the new key is valid. A record row with no such widget behaves as before: the key is still mirrored into each entry.
+- **`@objectstack/spec`.** `hookForm` offers `refusals` with that control. `HookSchema` is unchanged.
+- **`@objectstack/platform-objects`.** The generated metadata-form bundles carry the three new hook-form rows, translated in zh-CN, ja-JP and es-ES.
+- **`@object-ui/i18n`.** One new Studio string, `engine.form.key` (en, zh), which names the key column when the form declares no key label.
@@ -79,8 +79,13 @@ describe('the coverage gate demands the refusal (#22450)', () => {
     flows: [quoteGeneration],
     translations: [{ 'zh-CN': { ...(flows ? { flows } : {}) } }],
   });
+  // Scoped to the flows bucket: the metadata-form catalogue has `refusals` keys
+  // of its own since the hook form offers its refusal catalogue (#26835), and
+  // this synthetic tree translates no metadata form.
   const zhRefusals = (config: any) =>
-    computeI18nCoverage(config).issues.filter((i) => i.locale === 'zh-CN' && i.key.includes('.refusals.'));
+    computeI18nCoverage(config).issues.filter(
+      (i) => i.locale === 'zh-CN' && i.key.startsWith('flows.') && i.key.includes('.refusals.'),
+    );
 
   it('reports the untranslated refusal in the flow bucket', () => {
     const issues = zhRefusals(tree());
 
@@ -701,11 +701,15 @@ describe('#19403 round 5 — the blind spot, FIFTH shape: one schema, two forms,
     // it asserts `carrying.has('hook') === false`, and that assertion is TRUE
     // and CORRECT — `hookForm` enumerates no repeater at all — while seven
     // children sit enumerated and outside it.
+    // 9 since #26835: the hook form offers the `refusals` record, whose two
+    // entry fields (`message`, `status`) are enumerated the same way.
     expect(HOOK_ENUMERATED.covered.length, 'hookForm enumerates no repeater row properties').toBe(0);
-    expect(HOOK_ENUMERATED.skipped.length).toBe(7);
+    expect(HOOK_ENUMERATED.skipped.length).toBe(9);
     for (const child of SHARED_BODY_CHILDREN) expect(HOOK_ENUMERATED.skipped).toContain(`body.${child}`);
     expect(HOOK_ENUMERATED.skipped).toContain('retryPolicy.maxRetries');
     expect(HOOK_ENUMERATED.skipped).toContain('retryPolicy.backoffMs');
+    expect(HOOK_ENUMERATED.skipped).toContain('refusals.message');
+    expect(HOOK_ENUMERATED.skipped).toContain('refusals.status');
     //
     // ⇒ one composite, two forms, two different greens: a lit control that
     // passes on a sibling repeater, and a dark control that is right about
 
@@ -937,6 +937,18 @@ export const enMetadataForms: NonNullable<TranslationData['metadataForms']> = {
         label: "Memory Mb",
         helpText: "Per-invocation memory cap (MB, max 256)"
       },
+      refusals: {
+        label: "Refusals",
+        helpText: "Refusal catalogue, keyed by the SCREAMING_SNAKE code the body throws (e.g. CLEAN_VERSION_REQUIRED). The caller reads the declared message, translated into their language, with the declared status. JavaScript (L2) bodies only"
+      },
+      "refusals.message": {
+        label: "Message",
+        helpText: "The sentence the user reads when the body throws this code — plain text, with no placeholders"
+      },
+      "refusals.status": {
+        label: "Status",
+        helpText: "HTTP status of the refusal (400–499). Absent: 400"
+      },
       handler: {
         label: "Handler",
         helpText: "Handler function name (deprecated — prefer `body`)"
 
@@ -937,6 +937,18 @@ export const esESMetadataForms: NonNullable<TranslationData['metadataForms']> =
         label: "Memoria (MB)",
         helpText: "Límite de memoria por invocación (MB, máx. 256)"
       },
+      refusals: {
+        label: "Rechazos",
+        helpText: "Catálogo de rechazos, indexado por el código SCREAMING_SNAKE que lanza el cuerpo (p. ej. CLEAN_VERSION_REQUIRED). Quien llama recibe el mensaje declarado, traducido a su idioma, con el estado declarado. Solo cuerpos JavaScript (L2)"
+      },
+      "refusals.message": {
+        label: "Mensaje",
+        helpText: "La frase que lee el usuario cuando el cuerpo lanza este código — texto plano, sin marcadores"
+      },
+      "refusals.status": {
+        label: "Estado",
+        helpText: "Estado HTTP del rechazo (400–499). Si se omite: 400"
+      },
       handler: {
         label: "Manejador",
         helpText: "Nombre de función manejadora (obsoleto — preferir `body`)"
 
@@ -782,9 +782,10 @@ describe('#19403 round 6 — the composite blind spot, hook side, CLOSED', () =>
   it('the derivation reproduces round 5\'s measurement of what the repeater pin cannot see', () => {
     // `hookForm` enumerates no repeater at all, so `repeater-row-properties.test.ts`
     // is blind here through a DARK control that is TRUE and CORRECT — the shape
-    // round 5 wrote down. Seven children sit enumerated and outside it.
+    // round 5 wrote down. Seven children sit enumerated and outside it — 9
+    // since #26835, when the `refusals` record's `message` / `status` joined.
     expect(HOOK_ENUMERATED.covered.length, 'hookForm enumerates no repeater row properties').toBe(0);
-    expect(HOOK_ENUMERATED.skipped.length).toBe(7);
+    expect(HOOK_ENUMERATED.skipped.length).toBe(9);
     for (const child of SHARED_BODY_CHILDREN) expect(HOOK_ENUMERATED.skipped).toContain(`body.${child}`);
     expect(HOOK_ENUMERATED.skipped).toContain('retryPolicy.maxRetries');
     expect(HOOK_ENUMERATED.skipped).toContain('retryPolicy.backoffMs');
 
@@ -937,6 +937,18 @@ export const jaJPMetadataForms: NonNullable<TranslationData['metadataForms']> =
         label: "メモリ（MB）",
         helpText: "呼び出しごとのメモリ上限（MB、最大 256）"
       },
+      refusals: {
+        label: "拒否カタログ",
+        helpText: "本体がスローする SCREAMING_SNAKE のコード（例: CLEAN_VERSION_REQUIRED）をキーとする拒否カタログ。呼び出し元には宣言したメッセージ（その言語に翻訳）と宣言したステータスが返ります。JavaScript（L2）本体のみ"
+      },
+      "refusals.message": {
+        label: "メッセージ",
+        helpText: "本体がこのコードをスローしたときにユーザーが読む文 — プレーンテキスト、プレースホルダーなし"
+      },
+      "refusals.status": {
+        label: "ステータス",
+        helpText: "拒否の HTTP ステータス（400–499）。未指定: 400"
+      },
       handler: {
         label: "ハンドラー",
         helpText: "ハンドラー関数名（非推奨 — `body` を推奨）"
 
@@ -1233,7 +1233,9 @@ describe('#19403 round 10 — the verdicts, on the live bundles', () => {
       // 690 since #26602: the dataset form's measures repeater offers `polarity`
       // (which direction of a KPI delta is good news) — one row label, authored
       // in all three locales.
-      expect(translated.length, `${locale} positive control`).toBe(690);
+      // 693 since #26835: the hook form's `refusals` record and its `message` /
+      // `status` entry fields — three row labels, authored in all three locales.
+      expect(translated.length, `${locale} positive control`).toBe(693);
     }
     // ⭐ DARK — the blindness, executable. On a synthetic two-locale catalog the
     // all-three predicate returns 0 while the per-locale one returns 1, so the
 
@@ -937,6 +937,18 @@ export const zhCNMetadataForms: NonNullable<TranslationData['metadataForms']> =
         label: "内存（MB）",
         helpText: "单次调用内存上限（MB，最大 256）"
       },
+      refusals: {
+        label: "拒绝目录",
+        helpText: "拒绝目录，以正文抛出的 SCREAMING_SNAKE 错误码为键（例如 CLEAN_VERSION_REQUIRED）。调用方读到声明的提示语（按其语言翻译）和声明的状态码。仅适用于 JavaScript（L2）正文"
+      },
+      "refusals.message": {
+        label: "提示语",
+        helpText: "正文抛出此错误码时用户读到的句子——纯文本，不含占位符"
+      },
+      "refusals.status": {
+        label: "状态码",
+        helpText: "拒绝的 HTTP 状态码（400–499）。不填：400"
+      },
       handler: {
         label: "处理器",
         helpText: "处理器函数名（已废弃——建议使用 body）"
 
@@ -8,7 +8,7 @@ import { defineForm } from '../ui/view.zod';
  * Hooks intercept the data lifecycle. The body field is a composite
  * (`{ language, source, capabilities?, timeoutMs?, memoryMb? }`) whose
  * `source` renders in a Monaco code editor with language-appropriate
- * syntax highlighting.
+ * syntax highlighting. The body's refusal catalogue (`refusals`) sits beside it.
  */
 export const hookForm = defineForm({
   schemaId: 'hook',
@@ -46,6 +46,19 @@ export const hookForm = defineForm({
             { field: 'memoryMb', type: 'number', helpText: 'Per-invocation memory cap (MB, max 256)' },
           ],
         },
+        // The catalogue is a record keyed by the code, and an entry has no
+        // member that echoes its key — so the row takes the key-only record
+        // control, which never writes the key into the entry (#26835).
+        {
+          field: 'refusals',
+          type: 'record',
+          widget: 'key-only-record',
+          helpText: 'Refusal catalogue, keyed by the SCREAMING_SNAKE code the body throws (e.g. CLEAN_VERSION_REQUIRED). The caller reads the declared message, translated into their language, with the declared status. JavaScript (L2) bodies only',
+          fields: [
+            { field: 'message', type: 'textarea', required: true, helpText: 'The sentence the user reads when the body throws this code — plain text, with no placeholders' },
+            { field: 'status', type: 'number', helpText: 'HTTP status of the refusal (400–499). Absent: 400' },
+          ],
+        },
       ],
     },
     {