@@ -0,0 +1,15 @@
+---
+'@objectstack/spec': minor
+'@objectstack/platform-objects': patch
+---
+
+spec(ui): `requiredPermissions` on a `type: 'api'` action — a same-origin api action is gated at the platform action door (ADR-0066 D4 amended 2026-10-29)
+
+Clause-②: no
+Metadata-protocol: semantic
+
+The documented meaning of `requiredPermissions` on a `type: 'api'` action changes; no key, accepted value or default moves, and the schema shape is unchanged.
+
+- **Before.** The `requiredPermissions` docblock and `.describe()` (and the generated references under `content/docs/references/`), and the Studio action form's `requiredPermissions` help text (with its `en` / `zh-CN` / `ja-JP` / `es-ES` bundles in `@objectstack/platform-objects`), said a `type: 'api'` action pointed at a custom endpoint is called by the browser directly, never passes through the platform action route, and that the endpoint must re-check the capability itself — the 2026-07 scope note of ADR-0066 D4.
+- **Now.** Per ADR-0066 D4 as amended on 2026-10-29, a `type: 'api'` action whose `target` is a same-origin platform path (the declared `target`, before interpolation, starts with exactly one `/` and goes on past it — not `//`, nor `/` followed by a backslash) is dispatched by the platform action door — `POST /actions/:object/:action` and the MCP `run_action` bridge — which runs the D4 capability gate, the anonymous baseline and the ADR-0126 activation consult before forwarding the call in-process to the declared `target` as the caller. MCP keeps its `ai.exposed` opt-in and its fail-closed refusal of actions on `sys_*` objects, so those (`sys_user.ban_user` and the like) reach an agent through REST `POST /actions/:object/:action`, not MCP. The door gates the calls it dispatches, and only those: the target endpoint stays directly reachable, so it must still enforce the declared capability itself, the door's gate being the added check (defence in depth, not a replacement). The `.describe()` and the help text say "on every call the door dispatches", so they stay true before and after the server half lands. An api action whose `target` is not a same-origin platform path stays browser-only and ungoverned: the door does not dispatch it, MCP does not list it, and the activation switch refuses to flip it. The `operation: 'update'` refusal beside a `type: 'api'` executor now says `api` "calls the endpoint it names" rather than that the browser calls it. The description and the help text also drop `modal` from the list of server-dispatched types: the door dispatches `script`, `flow` and the declarative `operation: 'update'` write, and answers a `modal` action 400 as a client-side type.
+- **Landing.** ADR-0066 records the decision; the runtime that implements the door's api forwarding ships separately (ADR-0066 D4's amendment note names the server card). Until it lands the door still refuses `type: 'api'` and the console fetches `target` directly. Nothing an author writes today is refused or re-read differently by this release.
@@ -502,7 +502,7 @@ const result = ApiMethod.parse(data);
 | **requiresMembershipReach** | `Enum<'invite_member' \| 'cancel_invitation' \| 'update_member_role' \| …>` | optional | Organization endpoint (a MEMBERSHIP_REACH row) whose membership-grade gate this action follows; lowered into `visible` over current_user.positions at parse time. |
 | **disabled** | `boolean \| string \| { dialect: Enum<'cel' \| 'cron' \| 'template'>; source: string; ast?: any; meta?: object }` | optional | Disabled predicate — `true`/`false` literal, CEL string, or `{dialect, source}` envelope. The action is shown but refused when it evaluates TRUE. Omit = never disabled. |
 | **disabledReason** | `string \| Record<string, string>` | optional | Display-only reason a greyed action shows (its hover title and accessible description, or a menu item's second line) while `disabled` evaluates TRUE — the default-language string, or an inline locale map; translated at `objects.OBJECT._actions.ACTION.disabledReason` (`globalActions.ACTION.disabledReason` for an object-less action). Not a gate: the server refuses a call on its own rules (hooks, `requiredPermissions`), and nothing reads this as a condition. Omit = the default reason, "Not available for this record". A blank reason is refused. |
-| **requiredPermissions** | `string[]` | optional | [ADR-0066 D4] Capabilities required to invoke this action. Enforced with 403 on the platform action route (script/flow/modal + MCP) and mirrored as a UI hide; a `type: api` action pointed at a custom endpoint must re-check it there. |
+| **requiredPermissions** | `string[]` | optional | [ADR-0066 D4] Capabilities required to invoke this action. Enforced with 403 on every call the platform action door (`POST /actions/:object/:action` and MCP `run_action`) dispatches, and mirrored as a UI hide. ADR-0066 D4, as amended 2026-10-29, brings a `type: api` action whose declared `target` is a same-origin platform path (exactly one leading `/`, followed by neither `/` nor a backslash, with a path after it) under that door; its `target` endpoint stays directly reachable, so it MUST still enforce this capability itself, the door's gate being the added check. A `type: api` action with an off-origin `target` is browser-only and not gated server-side. |
 | **ai** | `{ exposed?: boolean; description?: string; category?: Enum<'data' \| 'action' \| 'flow' \| 'integration' \| 'vector_search' \| 'analytics' \| 'utility'>; paramHints?: Record<string, object>; … }` | optional | AI exposure (opt-in). Set ai.exposed=true + ai.description to make this callable by agents. |
 | **recordIdParam** | `string` | optional | Body key to inject the row id into when running from a list_item context. |
 | **recordIdField** | `string` | optional | Row field whose value seeds recordIdParam. Defaults to "id". |
 
@@ -347,7 +347,7 @@ const result = MetadataBulkResultSchema.parse(data);
 | **requiresMembershipReach** | `Enum<'invite_member' \| 'cancel_invitation' \| 'update_member_role' \| …>` | optional | Organization endpoint (a MEMBERSHIP_REACH row) whose membership-grade gate this action follows; lowered into `visible` over current_user.positions at parse time. |
 | **disabled** | `boolean \| string \| { dialect: Enum<'cel' \| 'cron' \| 'template'>; source: string; ast?: any; meta?: object }` | optional | Disabled predicate — `true`/`false` literal, CEL string, or `{dialect, source}` envelope. The action is shown but refused when it evaluates TRUE. Omit = never disabled. |
 | **disabledReason** | `string \| Record<string, string>` | optional | Display-only reason a greyed action shows (its hover title and accessible description, or a menu item's second line) while `disabled` evaluates TRUE — the default-language string, or an inline locale map; translated at `objects.OBJECT._actions.ACTION.disabledReason` (`globalActions.ACTION.disabledReason` for an object-less action). Not a gate: the server refuses a call on its own rules (hooks, `requiredPermissions`), and nothing reads this as a condition. Omit = the default reason, "Not available for this record". A blank reason is refused. |
-| **requiredPermissions** | `string[]` | optional | [ADR-0066 D4] Capabilities required to invoke this action. Enforced with 403 on the platform action route (script/flow/modal + MCP) and mirrored as a UI hide; a `type: api` action pointed at a custom endpoint must re-check it there. |
+| **requiredPermissions** | `string[]` | optional | [ADR-0066 D4] Capabilities required to invoke this action. Enforced with 403 on every call the platform action door (`POST /actions/:object/:action` and MCP `run_action`) dispatches, and mirrored as a UI hide. ADR-0066 D4, as amended 2026-10-29, brings a `type: api` action whose declared `target` is a same-origin platform path (exactly one leading `/`, followed by neither `/` nor a backslash, with a path after it) under that door; its `target` endpoint stays directly reachable, so it MUST still enforce this capability itself, the door's gate being the added check. A `type: api` action with an off-origin `target` is browser-only and not gated server-side. |
 | **ai** | `{ exposed?: boolean; description?: string; category?: Enum<'data' \| 'action' \| 'flow' \| 'integration' \| 'vector_search' \| 'analytics' \| 'utility'>; paramHints?: Record<string, object>; … }` | optional | AI exposure (opt-in). Set ai.exposed=true + ai.description to make this callable by agents. |
 | **recordIdParam** | `string` | optional | Body key to inject the row id into when running from a list_item context. |
 | **recordIdField** | `string` | optional | Row field whose value seeds recordIdParam. Defaults to "id". |
 
@@ -57,7 +57,7 @@ const result = ActionSchema.parse(data);
 | **requiresMembershipReach** | `Enum<'invite_member' \| 'cancel_invitation' \| 'update_member_role' \| 'transfer_ownership' \| 'remove_member' \| 'create_team' \| 'update_team' \| 'remove_team' \| … +4 more>` | optional | Organization endpoint (a MEMBERSHIP_REACH row) whose membership-grade gate this action follows; lowered into `visible` over current_user.positions at parse time. |
 | **disabled** | `boolean \| string \| { dialect: Enum<'cel' \| 'cron' \| 'template'>; source: string; ast?: any; meta?: object }` | optional | Disabled predicate — `true`/`false` literal, CEL string, or `{dialect, source}` envelope. The action is shown but refused when it evaluates TRUE. Omit = never disabled. |
 | **disabledReason** | `string \| Record<string, string>` | optional | Display-only reason a greyed action shows (its hover title and accessible description, or a menu item's second line) while `disabled` evaluates TRUE — the default-language string, or an inline locale map; translated at `objects.OBJECT._actions.ACTION.disabledReason` (`globalActions.ACTION.disabledReason` for an object-less action). Not a gate: the server refuses a call on its own rules (hooks, `requiredPermissions`), and nothing reads this as a condition. Omit = the default reason, "Not available for this record". A blank reason is refused. |
-| **requiredPermissions** | `string[]` | optional | [ADR-0066 D4] Capabilities required to invoke this action. Enforced with 403 on the platform action route (script/flow/modal + MCP) and mirrored as a UI hide; a `type: api` action pointed at a custom endpoint must re-check it there. |
+| **requiredPermissions** | `string[]` | optional | [ADR-0066 D4] Capabilities required to invoke this action. Enforced with 403 on every call the platform action door (`POST /actions/:object/:action` and MCP `run_action`) dispatches, and mirrored as a UI hide. ADR-0066 D4, as amended 2026-10-29, brings a `type: api` action whose declared `target` is a same-origin platform path (exactly one leading `/`, followed by neither `/` nor a backslash, with a path after it) under that door; its `target` endpoint stays directly reachable, so it MUST still enforce this capability itself, the door's gate being the added check. A `type: api` action with an off-origin `target` is browser-only and not gated server-side. |
 | **ai** | `{ exposed?: boolean; description?: string; category?: Enum<'data' \| 'action' \| 'flow' \| 'integration' \| 'vector_search' \| 'analytics' \| 'utility'>; paramHints?: Record<string, object>; … }` | optional | AI exposure (opt-in). Set ai.exposed=true + ai.description to make this callable by agents. |
 | **recordIdParam** | `string` | optional | Body key to inject the row id into when running from a list_item context. |
 | **recordIdField** | `string` | optional | Row field whose value seeds recordIdParam. Defaults to "id". |