@@ -0,0 +1,29 @@
+---
+'@objectstack/spec': minor
+'@object-ui/types': minor
+'@object-ui/plugin-calendar': minor
+'@object-ui/plugin-gantt': minor
+'@object-ui/plugin-list': minor
+'@object-ui/plugin-view': minor
+---
+
+refactor(types,plugin-calendar,plugin-gantt,plugin-list,plugin-view)!: the flat `object-calendar` and `object-gantt` field-mapping keys leave the published schemas; producers emit the `calendar` / `gantt` block (#25923)
+
+Clause-②: yes (narrowing)
+Metadata-protocol: narrowed
+
+<!-- adr-0087: not-required (no-migration-prescription) No `@objectstack/spec` key, object definition, stored row or stored shape moves: the spec's `ComponentPropsMap['object-calendar']` and `['object-gantt']` rows already refuse every key this change takes off `@object-ui/types`, so no metadata that the spec accepts carries them, and `objectstack migrate meta` has nothing to rewrite. What narrows is the `@object-ui/types` mirror of those rows: its TypeScript interfaces, its tolerant zod mirrors and, for `object-calendar`, the strict authoring face derived from them, which now refuses the five flat keys by name as the spec does. The affected party is a TypeScript author or a hand-written node, reached by the compiler and by `objectui validate`, and the renderers still read the flat spelling a host hands them. One drawing outcome moves: `getGanttConfig` validates a `gantt` block and never validated the flat spelling, so a pre-door stored view whose `options.gantt` carries a value the spec refuses now shows the refusal screen instead of drawing; that row is outside what the spec accepts, and its conversion belongs to the stored-row census of #25923, not to tolerance in a consumer. The other categories are closed on facts: the five packages publish (not unpublished); no ADR-0087 id covers this change (not registered or already-registered); and the narrowed symbols are zod-backed metadata shapes (not runtime-interface-only, type-surface-only or runtime-export-retired). -->
+
+`@object-ui/types` published, on `ObjectCalendarSchema` and `ObjectGanttSchema`, a flat spelling of the field mapping that the spec refuses on the node. A declared flat key is one the strict authoring face derives from, so `objectui validate` accepted the `object-calendar` spelling the spec refuses. The keys only the host writes now live on each renderer package's own hand-off type (ui/AGENTS.md Commandment #0.1), and the producers write the block.
+
+- **`@object-ui/types`**: `ObjectCalendarSchema` (TypeScript and zod) no longer declares `startDateField`, `endDateField`, `titleField`, `colorField` or `allDayField` flat; they are written in its `calendar` block. The `dateField` / `endField` tombstones stay and now prescribe `calendar.startDateField` / `calendar.endDateField`. `ObjectGanttSchema` no longer declares the 29 `GanttConfig` keys flat (`startDateField`, `endDateField`, `titleField`, `progressField`, `dependenciesField`, `colorField`, `viewMode`, `summaryExtent`, `interactions` and the rest), nor the legacy `dependencyField` alias or the `search` / `searchableFields` pair; they are written in its `gantt` block (the pair is not authored at all). `staticData`, `filter`, `sort`, `gantt` and the other node keys stay. For `object-gantt` the strict authoring face already refused every flat key (its arm is the `properties` bag), so the narrowing there is the published TypeScript and zod export.
+- **`@object-ui/plugin-calendar`**: `ObjectCalendarFlatFields` and `ObjectCalendarHandoff` type the flat read `getCalendarConfig` keeps for a host that mounts the renderer directly. The renderer is unchanged: the `calendar` block wins, and the flat spelling is read only without it.
+- **`@object-ui/plugin-gantt`**: `ObjectGanttFlatFields` (derived from `GanttConfig`, plus the alias and the search pair) and `ObjectGanttHandoff` type the flat read the same way. The renderer is unchanged.
+- **`@objectstack/spec`**: the `object-calendar` and `object-gantt` flat-key refusals no longer say `ObjectView` / `ListView` emit the flat spelling; they hand the binding off in the block, and the flat spelling is only a stored-document fallback the renderer still reads. The prescription itself is unchanged.
+- **`@object-ui/plugin-list`** and **`@object-ui/plugin-view`**: `ListView` and `ObjectView`'s `generateViewSchema` emit `calendar: { … }` and `gantt: { … }` on the node they build instead of the flat keys. They emit the block only where the renderer's flat branch drew: a calendar once `startDateField` is declared, a gantt once both dates are, with `titleField` floored at `'name'` as that branch floored it. A gantt binding carrying a value the spec's `GanttConfigSchema` refuses (a pre-door stored `options.gantt`, say) goes out nested too, and now shows the renderer's refusal screen where the unvalidated flat branch drew it.
+
+**BREAKING** for TypeScript code or hand-written nodes that write the flat keys on these two node types.
+
+- **Before.** `const node: ObjectCalendarSchema = { type: 'object-calendar', objectName: 'event', startDateField: 'start' }` compiled, and the `object-calendar` strict face accepted it.
+- **Now.** The flat key is a compile error, and `objectui validate` refuses it by name on `object-calendar` (it already did on `object-gantt`). A renderer handed a flat node by a host still draws it.
+- **Fix.** Move the keys into the block: FROM `{ type: 'object-calendar', startDateField: 'start', titleField: 'name' }` TO `{ type: 'object-calendar', calendar: { startDateField: 'start', titleField: 'name' } }`, and FROM `{ type: 'object-gantt', startDateField: 's', endDateField: 'e', progressField: 'p' }` TO `{ type: 'object-gantt', gantt: { startDateField: 's', endDateField: 'e', titleField: 'name', progressField: 'p' } }` (the `gantt` block requires `titleField`). Code that hands a flat node straight to `<ObjectCalendar>` or `<ObjectGantt>` types it as `ObjectCalendarProps['schema']` or `ObjectGanttProps['schema']`, which carry the flat keys.
@@ -6195,8 +6195,11 @@ export type ObjectKanbanPropsParsed = z.infer<typeof ObjectKanbanPropsSchema>;
 
 /**
  * The flat per-field spellings `ObjectCalendar` keeps reading as a
- * backward-compat fallback (`getCalendarConfig`; read points recorded in
- * `liveness/page.json`, row `regions`) and that `ObjectView`/`ListView` emit on their runtime handoff. Read, but
+ * stored-document fallback (`getCalendarConfig`; read points recorded in
+ * `liveness/page.json`, row `regions`). `ObjectView`/`ListView` hand the
+ * binding off in the `calendar` block, not flat (objectstack#25923), and the
+ * flat keys live on `plugin-calendar`'s own hand-off type, not on
+ * `@object-ui/types`' `ObjectCalendarSchema`. Read, but
  * NOT authorable — one composition key per concept (Prime Directive #12, the
  * `body` → `children` precedent on {@link PageContainerProps}): the authored
  * spelling is the `calendar` object.
@@ -6209,9 +6212,9 @@ const OBJECT_CALENDAR_FLAT_FIELD_GUIDANCE: readonly KeySetGuidance[] = [
     examples: ['startDateField', 'titleField'],
     prescription:
       'Write this as a key of the `calendar` config object instead — `calendar: { startDateField, '
-      + 'endDateField, titleField, colorField, allDayField }`. The flat spelling is the runtime handoff '
-      + '`ObjectView`/`ListView` emit and a stored-document fallback the renderer keeps reading; it is '
-      + 'not a second authorable spelling (one key per concept, Prime Directive #12).',
+      + 'endDateField, titleField, colorField, allDayField }`. `ObjectView`/`ListView` hand the binding '
+      + 'off in that block too; the flat spelling is only a stored-document fallback the renderer still '
+      + 'reads, not a second authorable spelling (one key per concept, Prime Directive #12).',
   },
 ];
 
@@ -7522,21 +7525,22 @@ export type ObjectMapProps = z.input<typeof ObjectMapPropsSchema>;
 export type ObjectMapPropsParsed = z.infer<typeof ObjectMapPropsSchema>;
 
 /**
- * The flat `GanttConfig` spellings `getGanttConfig`'s branch 2 reads and that
- * `ObjectView` / `ListView` EMIT when they flatten `options.gantt` — objectui's
- * own `FLAT_GANTT_CONFIG_KEYS` (read points recorded in `liveness/page.json`,
- * row `regions`). Read, but
+ * The flat `GanttConfig` spellings `getGanttConfig`'s branch 2 reads as a
+ * stored-document fallback — objectui's own `FLAT_GANTT_CONFIG_KEYS` (read
+ * points recorded in `liveness/page.json`, row `regions`). `ObjectView` /
+ * `ListView` hand the binding off in the `gantt` block, not flat
+ * (objectstack#25923). Read, but
  * NOT authorable, for the reason the map's twin set above records: objectui#6469
  * inherited the objectui#5018 ruling for this block, so the `gantt` block is the
  * authoring shape, it is taken WHOLE when present, and every flat key beside it
  * is named as ignored in a dev warning.
  *
- * The flat branch is the HOT path for this block — a hand-authored `gantt` block
- * reaching the renderer through either view layer has already been flattened —
- * which is exactly why the prescription matters here: an author who learned the
- * flat spelling from a view config (or from `@object-ui/types`'
- * `ObjectGanttSchema`, which declares the whole flat face) writes it on an SDUI
- * node next, where nothing flattens anything.
+ * The block branch is the path both view layers take — they hand the `gantt`
+ * block on whole — and the flat branch is only the stored-document fallback.
+ * The prescription still matters: an author who met the flat spelling in an
+ * older stored document writes it on an SDUI node next. The flat keys live on
+ * `plugin-gantt`'s package-local hand-off type (`ObjectGanttFlatFields`), not
+ * on `@object-ui/types`' `ObjectGanttSchema`, which declares only the block.
  *
  * Membership is `GanttConfigSchema`'s own shape plus the legacy singular
  * `dependencyField` alias the flat branch still reads beside `dependenciesField`
@@ -7561,9 +7565,10 @@ const OBJECT_GANTT_FLAT_CONFIG_GUIDANCE: readonly KeySetGuidance[] = [
     examples: ['startDateField', 'endDateField', 'viewMode'],
     prescription:
       'Write this as a key of the `gantt` config object instead — `gantt: { startDateField, endDateField, '
-      + 'titleField, ... }`. The flat top-level spelling is the internal form `ObjectView`/`ListView` '
-      + 'produce when they flatten `options.gantt`, not a second authoring spelling: whenever a `gantt` '
-      + 'block is present the renderer takes it WHOLE and names every flat key beside it as ignored. The '
+      + 'titleField, ... }`. `ObjectView`/`ListView` hand the binding off in that block too; the flat '
+      + 'top-level spelling is only a stored-document fallback the renderer still reads, not a second '
+      + 'authoring spelling: whenever a `gantt` block is present the renderer takes it WHOLE and names '
+      + 'every flat key beside it as ignored. The '
       + 'legacy singular `dependencyField` is `dependenciesField` inside that block.',
   },
 ];
@@ -7631,7 +7636,7 @@ function objectGanttMarker() {
  * `mobileReadOnly`.
  *
  * Measured and deliberately NOT declared: the flat `GanttConfig` spellings (the
- * flatten product — {@link OBJECT_GANTT_FLAT_CONFIG_GUIDANCE}); `title`, which
+ * stored-document fallback — {@link OBJECT_GANTT_FLAT_CONFIG_GUIDANCE}); `title`, which
  * this renderer never reads (the export-name chain is `gantt.exportFileName` →
  * `label` → the OBJECT's label → `objectName`); a row cap — the reload's `$top`
  * is the platform ceiling, spread in as core's `nonGridRowCeilingQuery()` (one
@@ -7642,7 +7647,7 @@ function objectGanttMarker() {
  * reads, `search` and `searchableFields` (sent as `$search` / `$searchFields`),
  * which `ListView` writes onto the node it generates from its toolbar Search
  * box (its `case 'gantt'` arm) — a host-generated key pair in the same position
- * as the flatten product, and not declared here.
+ * as the flat fallback spellings, and not declared here.
  *
  * VALUE posture: `gantt` is the one config block in this family whose value
  * contract is already the SPEC's — the renderer validates it against
 
@@ -321,12 +321,14 @@ of its own — the only lever there is `sourceView`, pointed at a view that
 declares the block (objectui#8170).
 
 The same five keys written flat on the node are **not** a second way to author
-this. That flat spelling is the runtime handoff — `ObjectView` and `ListView`
-emit it on the node they build, and `getCalendarConfig` falls back to it only
-when the node has no `calendar` block — so `ObjectCalendarSchema` declares it
-because the renderer reads it. `@objectstack/spec` refuses it at authoring with
-`unrecognized_keys` and names the `calendar` block in the same diagnostic (one
-key per concept, its Prime Directive #12).
+this. `@objectstack/spec` refuses them at authoring with `unrecognized_keys` and
+names the `calendar` block in the same diagnostic (one key per concept, its
+Prime Directive #12), and since objectstack#25923 `ObjectCalendarSchema` does
+not declare them flat either: `ObjectView` and `ListView` emit the `calendar`
+block on the node they build. `getCalendarConfig` still falls back to the flat
+spelling when a node has no `calendar` block, for a host that mounts the
+renderer directly; that read is typed on this package's own hand-off type,
+`ObjectCalendarHandoff`, not on the published schema.
 
 ```typescript
 import type { ObjectCalendarSchema } from '@object-ui/types';
 
@@ -23,7 +23,7 @@
  */
 
 import React, { useEffect, useState, useCallback, useMemo, useRef } from 'react';
-import type { ObjectCalendarSchema, DataSource, CalendarConfig } from '@object-ui/types';
+import type { ObjectCalendarSchema, ObjectCalendarBlockConfig, DataSource, CalendarConfig } from '@object-ui/types';
 import { CalendarView, type CalendarViewEvent } from './CalendarView';
 import { getVisibleDateRange } from './visibleDays';
 import { usePullToRefresh } from '@object-ui/mobile';
@@ -132,6 +132,26 @@ import {
  * Pinned in `__tests__/calendarUnionReads-8651.test.tsx`.
  */
 
+/**
+ * The five field-name keys written FLAT on the node: the package-local
+ * hand-off spelling (objectstack#25923, ui/AGENTS.md Commandment #0.1).
+ *
+ * `@objectstack/spec` refuses all five on `object-calendar` and prescribes the
+ * `calendar` block, so the published {@link ObjectCalendarSchema} declares
+ * none of them, and both producers in this tree (`ListView`, and
+ * `ObjectView`'s `generateViewSchema`) emit the block. `getCalendarConfig`
+ * still reads the flat five when a node carries no block, so a host that mounts
+ * `<ObjectCalendar schema={…}>` with them keeps its calendar; this type is that
+ * read, kept here, beside the one consumer, and off the authoring face.
+ * DERIVED from the block's own type, so the two spellings cannot fork.
+ */
+export type ObjectCalendarFlatFields = Partial<
+  Pick<ObjectCalendarBlockConfig, 'startDateField' | 'endDateField' | 'titleField' | 'colorField' | 'allDayField'>
+>;
+
+/** The node `ObjectCalendar` reads: the published schema plus {@link ObjectCalendarFlatFields}. */
+export type ObjectCalendarHandoff = ObjectCalendarSchema & ObjectCalendarFlatFields;
+
 /**
  * Props of the `ObjectCalendar` React component.
  *
@@ -149,7 +169,7 @@ import {
  * no importer breaks. Tripwire: `__tests__/spec-symbol-4650.test.ts`.
  */
 export interface ObjectCalendarComponentProps {
-  schema: ObjectCalendarSchema;
+  schema: ObjectCalendarHandoff;
   dataSource?: DataSource;
   className?: string;
   /** Pre-fetched records passed by a parent (e.g. ObjectView). When provided, skips internal data fetching. */
@@ -320,13 +340,17 @@ type ObjectCalendarConfig = CalendarConfig & {
  * `calendar-date-alias-refusal-8355.test.ts` and `plugin-list`'s
  * `ListView.calendarAliasRefused-8355.test.tsx`.
  */
-function getCalendarConfig(schema: ObjectCalendarSchema): ObjectCalendarConfig | null {
+function getCalendarConfig(schema: ObjectCalendarHandoff): ObjectCalendarConfig | null {
   // The declared configuration container — read FIRST, as the spec declares it.
   if (schema.calendar) {
     return schema.calendar as ObjectCalendarConfig;
   }
 
-  // The flat spelling, which `ObjectView` and `ListView` emit.
+  // The flat spelling — the package-local hand-off (`ObjectCalendarFlatFields`).
+  // No producer in this tree emits it since objectstack#25923 (`ListView` and
+  // `ObjectView` hand the view's block on as `calendar`), and the spec refuses
+  // it on an authored node; a host that mounts this component with it is the
+  // reader this branch keeps working.
   //
   // ⛔ The two alias rungs are spelled as a cast ON `schema` at each read site,
   // never through a renamed local. The repo's read census (objectui#6576's
@@ -1446,8 +1470,9 @@ export const ObjectCalendar: React.FC<ObjectCalendarComponentProps> = ({
    * `plugin-view`'s `ObjectView` — and app-shell reaches the first from two
    * faces, `ObjectView` (the object-view door) and `InterfaceListPage` (the
    * interface-page door). Every one of them hands this component the same
-   * shape: the shared `baseProps` bag plus whichever of `startDateField` /
-   * `endDateField` / `titleField` the author declared. NOTHING on the node
+   * shape: the shared `baseProps` bag plus a `calendar` block carrying whichever
+   * of `startDateField` / `endDateField` / `titleField` the author declared
+   * (flat on the node until objectstack#25923). NOTHING on the node
    * names the door, so there is nothing to infer from, and a door PROP would
    * have to be declared on the node's published schema and threaded through
    * four packages.