@@ -0,0 +1,39 @@
+---
+'@objectstack/spec': minor
+'@objectstack/objectql': patch
+---
+
+feat(spec)!: a page declares nothing the console does not honour — `isDefault: true` is refused off a record page bound to an object, `template` closes to the registered layouts, and a region the template does not place is refused
+
+Clause-②: yes (narrowing)
+
+**BREAKING (authoring):** two accept sets of `PageSchema` narrow to what the console runs, and the `PageTypeSchema` text stops promising what it does not.
+
+| Writing | Before | Now |
+| :--- | :--- | :--- |
+| `isDefault: true` on a `home`, `app`, `utility` or `list` page, or on a record page with no `object` | accepted, stored and served; nothing read it | refused at `isDefault` — by `definePage`, `defineStack` (so `os validate` and `os build`, `STACK_SCHEMA_INVALID` 422), the metadata save door (`422 INVALID_METADATA`) and package registration (`SchemaRegistry.installPackage` / `registerItem`, `422 INVALID_METADATA`) |
+| `template: 'full-width'` | accepted; drawn exactly as `default` | refused by name: "Page `template: 'full-width'` was removed in @objectstack/spec 18 … Use `template: 'default'`" |
+| any other `template` outside `default`, `header-sidebar-main`, `three-column`, `dashboard` (`two-column`, `single-column`, …) | accepted; drawn as the page type's default layout | refused at `template` |
+| on a `kind: 'full'` page, a region its template does not place (`left_sidebar`, `right_sidebar`, `content`, …) | accepted; stacked under `main` at full width, its `width` ignored | refused at `regions.N.name`, naming the template's slots and the rename |
+| on a `kind: 'full'` page, a second region filling a slot an earlier one fills (two `main` regions; on `dashboard`, a second `header` or `footer`) | accepted; not drawn at all — the console draws the first region of a name and leaves that name out of the rest | refused at `regions.N.name`, naming the region that already fills the slot |
+
+Migration:
+
+- **`isDefault` on a non-record page** → delete it. A page does not choose where an app opens: an app's landing page is its **first navigation item** (by `order`), so to land on the page put its entry first in the app's `navigation`; the root landing follows the app's own `isDefault`. A record page meant as an object's default record page binds that object with `object`.
+- **`template: 'full-width'`** → `template: 'default'` (or delete the key — `default` is the default). The page renders exactly as before.
+- **A `template` held in a widened `string`** (a shared base object, `{ template: 'default' }` spread into `definePage`) no longer type-checks against the closed set → `template: 'default' as const`.
+- **An unregistered template** → one of `default` (header, sidebar, main, aside, footer), `header-sidebar-main` (header, sidebar, main), `three-column` (header, sidebar, main, aside, footer) or `dashboard` (header, footer, and every other region a grid cell).
+- **An unplaced region** → name it for the slot it fills: `left_sidebar` → `sidebar`, `right_sidebar` → `aside`, `content` → `main`; or choose `dashboard` when the regions are a grid. Names match case-insensitively, as the console's do. `slotted`, `html` and `react` pages are not judged on region names.
+- **A second region for a filled slot** → move its components into the first region of that name, or name it for an unfilled slot. On `dashboard`, two regions of any other one name stay two grid cells and are accepted.
+
+The template set and each template's slots are now published: `PageTemplateSchema`, `PAGE_TEMPLATE_SLOTS` and `PAGE_TEMPLATE_OPEN_GRID` (`@objectstack/spec/ui`), with the two checks `checkPageDefaultPlacement` and `checkPageRegionPlacement` and the one refusal sentence `misplacedDefaultPageRefusal` that the parse and the registry share.
+
+`os migrate meta` lists both as hand edits — the D3 entries `page-is-default-off-record-page-refused` and `page-template-closed-region-unplaced-refused`. No D2 conversion rewrites them: where an app opens, and which slot a region fills, are the author's calls.
+
+**Stored metadata keeps loading.** No conversion touches these shapes and the read path does not refuse them, so a `sys_metadata` page row already stored with a non-record `isDefault: true`, `template: 'full-width'` or an unplaced region is served unchanged and renders as before (a stored row hydrates into the registry without a package, so the registry does not judge it either). Saving such a row again through the metadata API is refused until it is fixed.
+
+The text, without a contract change: `PageTypeSchema`'s docblock and enum comments now say that `home`, `app` and `utility` are the same region layout at three content widths — `home` is not a landing declaration, and `utility` is an ordinary inline page (the console has no floating or docked shell slot for it); `utility` stays a page type, read by the print door and the page-type width. The `print`-on-`utility` refusal no longer calls a utility page "a floating panel".
+
+`@objectstack/objectql`: the registry refuses `isDefault: true` on a non-record page a package registers (`MisplacedDefaultPageError`, `INVALID_METADATA` 422), at the package door and at the package-bound item seam, with the page parse's sentence.
+
+<!-- adr-0087: registered page-is-default-off-record-page-refused, page-template-closed-region-unplaced-refused -->
@@ -0,0 +1,18 @@
+---
+"@objectstack/console": minor
+---
+
+Console (objectui) refreshed to `daeb77fc84dd`. Frontend changes in this range:
+
+Derived from the changesets objectui declared over the range — 4 releasing of 4 changesets added across 5 non-merge commits; omitted: 1 commit carrying no changeset (they ship no package code).
+
+- **minor** — Studio, Interfaces pillar: an html or react page reads like a code page. The source editor's plain-text fallback numbers its lines and wraps long ones as the code editor does, and… (objectui `830eb1f2d`)
+- **patch** — A new record page seeded in Studio is saved with the `default` layout template instead of `full-width`, and the page node's `template` member is typed by reference to the spec's (… (objectui `daeb77fc8`)
+- **patch** — Two Studio pickers are named by the labels shown beside them (objectui#12510). Nothing changes on screen. (objectui `3e09c1e8d`)
+- **patch** — Studio's empty surfaces now carry the action that fills them (objectui#12514). (objectui `f23eb01cb`)
+
+**In this console build, declared nowhere** — objectui merged 1 commit in this range with no `.changeset/*.md`. The code is inside the pin above and ships here, but nothing upstream declared it, so it appears in no objectui CHANGELOG and in no entry above. Listed by subject rather than counted, because a count cannot tell a dependency bump from a form-behaviour change (objectstack#6174); the upstream gate that would prevent this is objectui#3387.
+
+- _(no changeset)_ docs(studio-redesign): move the 61 PR screenshots under after/ to an evidence branch and remove them from main (#12583) (objectui `7066dae53`)
+
+objectui range: `f96f771140f1...daeb77fc84dd`
@@ -1 +1 @@
-f96f771140f1ba488245e0d0d3e7420d720bff9a
+daeb77fc84dd824e74c95b87cdede85afdb248e7
@@ -72,7 +72,15 @@ Page
 
 ## Page Templates
 
-Top-level layout structures that define macro organization.
+Top-level layout structures that define macro organization. `template` is one of the
+layouts the console registers — `default` (`header`, `sidebar`, `main`, `aside`,
+`footer`), `header-sidebar-main` (`header`, `sidebar`, `main`), `three-column` (the same
+five as `default`) or `dashboard` (`header`, `footer`, and every other region a grid cell)
+— and each region's `name` is a slot that template places. Any other template name, and
+on a `kind: 'full'` page any region name the template does not place, is refused when the
+page is parsed (`os validate`, `os build`, the metadata save door): the console would draw
+an unregistered template as the default layout, and stack an unplaced region under `main`
+at full width with its `width` ignored.
 
 ### Standard Template
 
@@ -102,7 +110,7 @@ name: account_record
 label: Account Record Page
 type: record
 object: account
-template: standard
+template: default
 regions:
   - name: header
     components:
@@ -150,22 +158,23 @@ regions:
 
 High-density layout for power users (like Salesforce Service Console).
 
+It is the `header-sidebar-main` template: the list in `sidebar`, the record in `main`.
+
 {/* os:check-yaml page */}
 ```yaml
 name: service_console
 label: Service Console
 type: app
-template: console
+template: header-sidebar-main
 regions:
-  - name: left
+  - name: sidebar
     width: small
     components:
       - type: object-grid
         properties:
           objectName: case
 
-  - name: right
-    width: full
+  - name: main
     components:
       - type: page:tabs
         properties:
@@ -218,9 +227,8 @@ regions:
   a matching `Multi-Step Onboarding Wizard` example further down. **`steps` exists
   on no schema.** `PageSchema` is `.strict()`, so it is refused by name
   (`Unrecognized key(s) on this page: steps`), and no other shape in the spec
-  declares it either. `template: wizard` compounds it quietly: `template` is a
-  free-form string, so that half *parses* while naming a layout template no
-  renderer provides.
+  declares it either. `template: wizard` is refused as well: `template` names
+  one of the layouts the console registers, and no renderer provides a wizard.
 
   Both are **removed rather than implemented** — multi-step authoring is an
   implementation card first, exactly like the deferred tab loading and the
@@ -757,7 +765,7 @@ properties:
   **There is no page-level `layout:` block.** Earlier revisions of this page
   described three advanced layouts as a top-level `layout:` mapping —
   `split_view`, `card_grid` and `kanban`. On `PageSchema`, `layout` is an
-  **alias for `template`**, a plain string naming a layout template, so a mapping
+  **alias for `template`**, which names one of the registered layout templates, so a mapping
   written there is refused with exactly that rename hint (`Did you mean layout →
   template?`). None of `split_view`, `card_grid`, `list_view` or `detail_view` is
   a type on any schema.
@@ -843,12 +851,12 @@ interface Page {
   // ever shipped). They live in PAGE_TYPE_ROADMAP; authoring one now fails
   // validation. See page.zod.ts (PageTypeSchema / PAGE_TYPE_ROADMAP).
   object?: string;       // bound object for record pages
-  template?: string;     // layout template name, default 'default'
+  template?: 'default' | 'header-sidebar-main' | 'three-column' | 'dashboard';  // default 'default'
   regions?: PageRegion[]; // named regions, each holding components (optional; defaults to [])
 }
 
 interface PageRegion {
-  name: string;          // e.g. "header", "main", "sidebar"
+  name: string;          // a slot the page's template places: header, sidebar, main, aside, footer
   width?: 'small' | 'medium' | 'large' | 'full';
   components: PageComponent[];
 }
@@ -1016,7 +1024,7 @@ name: customer_360
 label: Customer 360
 type: record
 object: customer
-template: standard
+template: default
 regions:
   - name: header
     components:
 
@@ -1,7 +1,7 @@
 ---
 title: Protocol reference — every schema by module
 navTitle: Protocol Reference
-description: Every schema published by @objectstack/spec — 1535 schemas across 14 protocol modules
+description: Every schema published by @objectstack/spec — 1536 schemas across 14 protocol modules
 ---
 
 {/* ⚠️  AUTO-GENERATED — DO NOT EDIT. Run build-docs.ts to regenerate. Hand-written docs live in the module folders under content/docs/. */}
@@ -33,8 +33,8 @@ counts are sums of the rows they head. Regenerate with
 | [Shared Protocol](/docs/references/shared) | 10 | 31 | Primitives used across every protocol — identifiers, HTTP, expressions, error maps, enums. |
 | [Studio Protocol](/docs/references/studio) | 3 | 35 | Studio designer metadata — the authoring surfaces for the protocols above. |
 | [System Protocol](/docs/references/system) | 36 | 284 | The runtime environment — logging, jobs, cache, metrics, notifications, i18n and compliance. |
-| [UI Protocol](/docs/references/ui) | 16 | 167 | Apps, pages, views, dashboards, reports, actions and themes — the ObjectUI layer. |
-| **Total** | **197** | **1535** | 14 protocol modules |
+| [UI Protocol](/docs/references/ui) | 16 | 168 | Apps, pages, views, dashboards, reports, actions and themes — the ObjectUI layer. |
+| **Total** | **197** | **1536** | 14 protocol modules |
 
 ---
 
@@ -364,7 +364,7 @@ The runtime environment — logging, jobs, cache, metrics, notifications, i18n a
 
 ## UI Protocol
 
-**Source:** `packages/spec/src/ui/` · **Import:** `@objectstack/spec/ui` · **16 pages, 167 schemas**
+**Source:** `packages/spec/src/ui/` · **Import:** `@objectstack/spec/ui` · **16 pages, 168 schemas**
 
 Apps, pages, views, dashboards, reports, actions and themes — the ObjectUI layer.
 
@@ -381,7 +381,7 @@ Apps, pages, views, dashboards, reports, actions and themes — the ObjectUI lay
 | [`expression-bindable-text-keys.zod.ts`](/docs/references/ui/expression-bindable-text-keys) | `ExpressionBindableTextKey` |
 | [`i18n.zod.ts`](/docs/references/ui/i18n) | `AriaProps`, `I18nLabel`, `InlineLocaleMap` |
 | [`notification.zod.ts`](/docs/references/ui/notification) | `NotificationPosition`, `NotificationSeverity`, `NotificationType` |
-| [`page.zod.ts`](/docs/references/ui/page) | `ElementApiDataSource`, `ElementDataSource`, `InterfacePageConfig`, `Page`, `PageComponent`, `PageComponentType`, `PagePrint`, `PageRegion`, `PageType`, `PageVariable` |
+| [`page.zod.ts`](/docs/references/ui/page) | `ElementApiDataSource`, `ElementDataSource`, `InterfacePageConfig`, `Page`, `PageComponent`, `PageComponentType`, `PagePrint`, `PageRegion`, `PageTemplate`, `PageType`, `PageVariable` |
 | [`report.zod.ts`](/docs/references/ui/report) | `JoinedReportBlock`, `Report`, `ReportChart`, `ReportSort`, `ReportType` |
 | [`responsive.zod.ts`](/docs/references/ui/responsive) | `ResponsiveStyles`, `StyleMap` |
 | [`sharing.zod.ts`](/docs/references/ui/sharing) | `SharingConfig` |
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`@@ -1 +1 @@`
`1`		`-f96f771140f1ba488245e0d0d3e7420d720bff9a`
	`1`	`+daeb77fc84dd824e74c95b87cdede85afdb248e7`