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@@ -0,0 +1,41 @@
+---
+'@objectstack/spec': minor
+---
+
+feat(spec)!: an `action:group` / `action:menu` member refuses a non-array `params` unless its `type` is `api`, with the prescription to author an action with static parameter values as its own `action:button` node
+
+Clause-②: yes (narrowing)
+
+<!-- adr-0087: registered ui-action-group-menu-member-params-array-only -->
+
+**BREAKING**: an accept-set narrowing on a published authoring surface, shipped as `minor` under the repo's launch-window convention for accept-set narrowings. What reads the rows: the component-props gate on `objectstack validate`, `objectstack build` and `objectstack lint`, which reports the refusal as an advisory `component-props-invalid` finding. A stored page still saves and loads, because a page component's `properties` is not parsed on the metadata save or load path.
+
+**Why.** A container member's `params` is its input list: both containers forward an array as the `ActionParam[]` inputs to collect before the action runs. They forward any other `params` value only for a `type: 'api'` member, as its request payload, and drop it for every other `type` (an absent one included), with a development-build warning only. The member declared `params` as any value, so an object `params` on a `navigate_edit` member passed the gate and then had no effect: no error and no static values. `params` carries one shape, and no second value-bag key is declared; a member's `properties.params` is already refused. So static parameter values are not part of the inline action vocabulary at all, and an action that needs them is its own `action:button` node, whose `params` object carries them.
+
+**What is refused.** On an `action:group` or `action:menu` member whose `type` is not `api`, a `params` that is not an array — an object, a string, a number or `null`. The issue's `code` is `custom`, at `actions.N.params`, and its message names the container, the member's `type` and the prescription: *to run an action with static parameter values, author it as its own `action:button` node, whose `params` object carries them* (and, for a `type: 'api'` member's request body, `bodyExtra`).
+
+**What stays accepted, byte for byte.** An array `params` on any member; every `params` value on a `type: 'api'` member (its request-payload window, unchanged); a member with no `params`; and an `action:button` / `action:icon` node's object `params`, which is its static values. The member's `params` stays `unknown` in the types — the narrowing is a refinement on the member, and no export, key or type moves.
+
+## FROM → TO
+
+| you wrote | write instead |
+|:--|:--|
+| `actions: [{ name: 'edit', type: 'navigate_edit', params: { objectName: 'account', recordId: '${record.id}' } }]` on `action:group` / `action:menu` | the action as its own node: `{ type: 'action:button', properties: { name: 'edit', label: 'Edit', actionType: 'navigate_edit', params: { objectName: 'account', recordId: '${record.id}' } } }` |
+| `actions: [{ name: 'save', type: 'api', target: '/api/save', params: { status: 'closed' } }]` | unchanged — or, preferred, `bodyExtra: { status: 'closed' }` |
+| `actions: [{ name: 'ask', type: 'script', params: [{ name: 'reason', type: 'text' }] }]` | unchanged — an array is the input list |
+
+**The one-line fix: move a member that carries static parameter values out of its container into its own `action:button` node, with the same `params` object; drop a non-array `params` from any other member.** The container never forwarded those values, so the `action:button` node is the first place they reach the handler.
+
+## Who is affected, measured
+
+A writer is an `action:group` / `action:menu` member authoring a non-array `params` on a non-`api` type. The census walked every `params` key in every file that names either block (TypeScript AST over `.ts`/`.tsx`/`.js`/`.jsx`/`.mjs`/`.cjs`/`.mts`/`.json` and fenced Markdown code, same-file constants resolved; YAML by text), plus every non-array `params` on an element of any `actions` array corpus-wide, and each hit was read by hand. Lit control: a planted fixture with four non-`api` object members (flat, inside a node's `properties` bag, through a same-file constant, in a Markdown fence), an `api` member and an array member — all six found and classified.
+
+- **objectstack** at `5b2d189e28`, this branch's base: 24 files name a block, holding 32 `params` keys, 23 not an array; none is a container member's — conversion fixtures of the inline `element:button` action, schema source, the liveness ledger, CHANGELOG quotations, and one `properties.params` refusal probe. No example, doc, skill or fixture writes the refused spelling.
+- **objectui** at the `.objectui-sha` pin `0abd4f9f8` and at `main` `f1a177c41` (the same census at both; the action renderers byte-identical): 89 files, 47 `params` keys, 41 not an array. The only container members with a non-array `params` on a non-`api` type are objectui's own tests asserting that the container drops it (`action-entry-object-params-10462.test.tsx`, `action-container-member-params-10290.test.tsx`); the `type: 'api'` controls beside them stay accepted.
+- **hotcrm** at `4054ec2680`: no file names either block.
+- **cloud** was not reachable from this session. **Deployed metadata** was not measured.
+
+### The kit
+
+- **The refusal.** A refinement on each container member (`ui/component.zod.ts`), applied to the `action:group` and the `action:menu` member alike; the member's `params` description says what it now takes, and the generated reference page carries it.
+- **The ledger.** The D3 semantic entry `ui-action-group-menu-member-params-array-only` (protocol 18) and its step-18 rationale fragment. No key is removed, so there is no tombstone, and there is no D2 conversion: the static values belong on a different node, which no rewrite can build in the author's place.
@@ -87,7 +87,7 @@ const result = ActionButtonPropsSchema.parse(data);
 | **visible** | `boolean \| string \| { dialect: Enum<'cel' \| 'cron' \| 'template'>; source: string; ast?: any; meta?: object }` | optional | Visibility predicate — a boolean, a CEL string, or a `{ dialect, source }` envelope, evaluated against the row the host binds; the item is not drawn when it is FALSE, and a predicate that fails to evaluate hides it. Omit for always-visible |
 | **disabled** | `boolean \| string \| { dialect: Enum<'cel' \| 'cron' \| 'template'>; source: string; ast?: any; meta?: object }` | optional | Disabled predicate — a boolean, a CEL string, or a `{ dialect, source }` envelope; the item is drawn but cannot be pressed while it is TRUE, and a predicate that fails to evaluate disables it. Omit for never-disabled |
 | **tags** | `Enum<'separator-before'>[]` | optional | Item tags — `separator-before` draws a divider above the item in a dropdown or menu (not above the first item); no other tag is drawn |
-| **params** | `any` | optional | Action parameters, forwarded to the runner: an array is the list of inputs to collect from the user before the action runs; an object is forwarded as the request payload of a `type: 'api'` member only (use `bodyExtra` for that) |
+| **params** | `any` | optional | Action parameters, forwarded to the runner: an array is the list of inputs to collect from the user before the action runs. Only a `type: 'api'` member takes any other value, forwarded as its request payload (use `bodyExtra` for that); on every other member a non-array `params` is refused — author an action with static parameter values as its own `action:button` node |
 | **description** | `string` | optional | Action description, forwarded to the runner — the parameter dialog shows it under its title |
 | **target** | `string` | optional | Executor target, forwarded to the runner: the URL, script name, flow name or API endpoint, per `type` |
 | **openIn** | `Enum<'self' \| 'new-tab'>` | optional | For a `url` action: `self` navigates in place, `new-tab` opens a new browser tab |
@@ -170,7 +170,7 @@ const result = ActionButtonPropsSchema.parse(data);
 | **visible** | `boolean \| string \| { dialect: Enum<'cel' \| 'cron' \| 'template'>; source: string; ast?: any; meta?: object }` | optional | Visibility predicate — a boolean, a CEL string, or a `{ dialect, source }` envelope, evaluated against the row the host binds; the item is not drawn when it is FALSE, and a predicate that fails to evaluate hides it. Omit for always-visible |
 | **disabled** | `boolean \| string \| { dialect: Enum<'cel' \| 'cron' \| 'template'>; source: string; ast?: any; meta?: object }` | optional | Disabled predicate — a boolean, a CEL string, or a `{ dialect, source }` envelope; the item is drawn but cannot be pressed while it is TRUE, and a predicate that fails to evaluate disables it. Omit for never-disabled |
 | **tags** | `Enum<'separator-before'>[]` | optional | Item tags — `separator-before` draws a divider above the item in a dropdown or menu (not above the first item); no other tag is drawn |
-| **params** | `any` | optional | Action parameters, forwarded to the runner: an array is the list of inputs to collect from the user before the action runs; an object is forwarded as the request payload of a `type: 'api'` member only (use `bodyExtra` for that) |
+| **params** | `any` | optional | Action parameters, forwarded to the runner: an array is the list of inputs to collect from the user before the action runs. Only a `type: 'api'` member takes any other value, forwarded as its request payload (use `bodyExtra` for that); on every other member a non-array `params` is refused — author an action with static parameter values as its own `action:button` node |
 | **description** | `string` | optional | Action description, forwarded to the runner — the parameter dialog shows it under its title |
 | **target** | `string` | optional | Executor target, forwarded to the runner: the URL, script name, flow name or API endpoint, per `type` |
 | **openIn** | `Enum<'self' \| 'new-tab'>` | optional | For a `url` action: `self` navigates in place, `new-tab` opens a new browser tab |
 
@@ -2,8 +2,8 @@
   "description": "Shrink-only ledger of every PUBLISHED JSON Schema that is STILL WIDER than the Zod type it was generated from, because a rule written as `.refine()` reaches the runtime and not the file (#18670). `z.toJSONSchema()` has no arm for a `custom` check: a plain record, the same record with a `.refine()`, and the same record with an ABORTING `.refine()` all project byte-identically (measured on zod 4.4.3, the version packages/spec resolves). So a document one of these files ACCEPTS can still be refused at parse time, and an author -- or an AI -- validating against packages/spec/json-schema/** finds out a release later. Each `sites` path is a position under that schema at which a refinement is dropped; the same paths are written onto the artifact itself as `x-dropped-refinements`. Item 2 closed the first patterns: a refinement DECLARED through the closed list in src/shared/refinement-projection.ts is emitted into the published file, reads `projected` rather than `dropped`, and its row LEAVES this ledger in the same PR -- which is why the ledger shrinks and never grows on a repair. Every refinement outside that closed list stays here, and adding an arm to the list is a public-contract decision, not a refactor. Hand-edited on purpose and with no `gen:` script: a generator would let a new gap be admitted by running a command instead of by a decision, which is the silence this ledger exists to end. Adding, removing or moving a site fails packages/spec/scripts/build-schemas.ts until the line moves with it, and the failure prints the corrected entry in full. ⛔ Do not delete or weaken a refinement to shorten this file -- the runtime rule is correct; it is the projection that is silent, and the remedy is to teach the closed list a NAMED pattern, never to drop the rule.",
   "measured": {
     "zod": "4.4.3",
-    "publishedSchemasWithDroppedRefinements": 218,
-    "droppedRefinementSites": 676,
+    "publishedSchemasWithDroppedRefinements": 220,
+    "droppedRefinementSites": 678,
     "refinementSitesThatDidProject": 369,
     "refinementSitesWithNoJsonFormToCompare": 0
   },
@@ -1203,6 +1203,16 @@
         "outputSchema"
       ]
     },
+    "ui/ActionGroupProps": {
+      "sites": [
+        "actions.element"
+      ]
+    },
+    "ui/ActionMenuProps": {
+      "sites": [
+        "actions.element"
+      ]
+    },
     "ui/ActionParam": {
       "sites": [
         "in"
 
@@ -0,0 +1,47 @@
+// Copyright (c) 2026 ObjectStack. Licensed under the Apache-2.0 license.
+
+import type { SemanticMigration } from '../../types.js';
+
+// #21855 — the rows' value ratchet for one member: an `action:group` /
+// `action:menu` member's `params` takes the array form (`ActionParam[]`) only,
+// unless the member's `type` is `api`, whose object `params` keeps the
+// inline-action payload window (#5777) until 18. The maintainer's ruling A on
+// objectui#10289 keeps `params` to one shape and declares no other value-bag
+// key, and #21704's fork 5 A refused the member's `properties.params`, so a
+// member has no static-values spelling and the container drops a non-array
+// `params` on any other type at run time. D3 only: page-component `properties`
+// is not parsed on the metadata save or load path, so a stored page is never
+// refused; there is no D2 conversion, because the only home for static values
+// is a different node (an `action:button`), which no rewrite can build in the
+// author's place; and the census found no writer to respell.
+export const entry: SemanticMigration = {
+  id: 'ui-action-group-menu-member-params-array-only',
+  // No backticks and no pipes in `surface` — build-upgrade-guide.ts renders it
+  // inside a code span.
+  surface: 'page action:group and action:menu components — a member of properties.actions whose type is not api, '
+    + 'and whose params is not an array',
+  replacement: 'Write `params` as the list of inputs to collect from the user, an `ActionParam[]` array. To run an '
+    + 'action with static parameter values, author it as its own `action:button` node, whose `params` object carries '
+    + 'them; for a `type: \'api\'` member\'s request body write `bodyExtra`. A member that needs neither drops the key.',
+  reason: 'An `action:group` or `action:menu` runs each member itself and forwards an array `params` as the input '
+    + 'list. It forwards any other `params` value only for a `type: \'api\'` member, as its request payload; for '
+    + 'every other `type`, an absent one included, it drops the value, with a development-build warning only. The '
+    + 'member declared `params` as any value, so an object `params` on such a member passed the component-props '
+    + 'gate and then had no effect: no error and no static values. `params` carries one shape, the input list, and '
+    + 'no second value-bag key is declared; a member\'s `properties.params` is already refused, so static parameter '
+    + 'values are not part of the inline action vocabulary at all, and the action that needs them is its own '
+    + '`action:button` node. The member now refuses a non-array `params` on a non-`api` type at the gate, at '
+    + '`actions.N.params`, with that prescription. The `api` member\'s object `params` is unchanged. It is read '
+    + 'where every page component\'s props are: the component-props gate reports the refusal as an advisory '
+    + '`component-props-invalid` finding on `objectstack validate`, `objectstack build` and `objectstack lint`, and a '
+    + 'stored page still saves and loads, because a page component\'s `properties` is not parsed on the metadata '
+    + 'save or load path. No conversion is registered: the static values belong on a different node, and the '
+    + 'census found no writer. Deployed metadata NOT MEASURED.',
+  acceptanceCriteria: 'Every `action:group` and `action:menu` node validates: `objectstack validate` reports no '
+    + '`component-props-invalid` finding at `properties.actions.N.params`. Each member whose action needs static '
+    + 'parameter values is now its own `action:button` node, and pressing it hands the handler those values. '
+    + 'Census at the time of the change: no `action:group` / `action:menu` member authors a non-array `params` on a '
+    + 'non-`api` type in this repository, in objectui (at the pinned commit and on its main branch) or in the hotcrm '
+    + 'application, outside objectui\'s own tests asserting that the container drops it; the cloud repository was not '
+    + 'reachable.',
+};