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@@ -0,0 +1,20 @@
+---
+'@object-ui/types': minor
+---
+
+`flex`, `object-grid` and `object-chart` accept the node-level `responsiveStyles` that `@objectstack/spec`'s `PageComponentSchema` declares on every page component, and judge it as the spec does (objectui#10872, batch 9).
+
+**Clause-②: yes (widening)**: the strict authoring face (`StrictAnyComponentSchema`) now accepts a node-level `responsiveStyles` on `FlexSchema`, `ObjectGridSchema` and `ObjectChartSchema`, where it refused the key by name. Batch 8 declared the same key on the 30 public-block arms; these are the three arms outside that set whose nodes the objectstack showcase and UI skill write it on.
+
+**What changed, in observable terms.**
+
+- The three arms declare `responsiveStyles` from the same shared declaration as the public-block arms: the spec's `ResponsiveStylesSchema`, by reference. Its breakpoints (`large`, `medium`, `small`, `xsmall`), its strictness and its unknown-breakpoint message come from the spec.
+- A node such as `{ "type": "flex", "direction": "col", "responsiveStyles": { "large": { "display": "block", "minWidth": "0" }, "small": { "padding": "12px" } } }` parses on both faces, and the map comes back unchanged. The same holds for `object-grid` and `object-chart` nodes.
+- The published TypeScript interfaces `FlexSchema`, `ObjectGridSchema` and `ObjectChartSchema` declare `responsiveStyles?: ResponsiveStyles`, the spec's type. Before, the key was typed `any` through `BaseSchema`'s index signature.
+- Nothing else widens. `BaseSchema` still does not declare `responsiveStyles`, and neither does any other arm (`stack`, `grid` and `container` included), so the strict face still refuses it there by name. The other node-level keys the spec declares (`events`, `aria`, `visibility`, `responsive`, and `dataSource` on `flex` and `object-chart`) stay undeclared.
+
+**Narrowing, on already-published arms.** Unlike the public-block arms, these three were published before this change, and two things now refuse what used to pass:
+
+- The tolerant face (`safeValidateSchema`, the face `objectui validate` runs) used to keep any node-level `responsiveStyles` value on these arms unjudged. It now refuses a value the spec refuses, at `responsiveStyles`, with the spec's own issue: a breakpoint the spec does not have (`md`), a number instead of a map, or a style value that is neither a string nor a number. `SchemaRenderer` applied nothing for a number or for a map with no spec breakpoint. It emitted a non-CSS value inside a valid breakpoint verbatim, where the browser dropped it, and it applied the valid breakpoints of a mixed map.
+- In TypeScript, a `responsiveStyles` value that is not the spec's `ResponsiveStyles` no longer type-checks on these three interfaces.
+- An `object-view`'s `table` slot, which takes `ObjectGridSchema`'s members, does not gain the key. `ObjectView` draws its grid as a component, not as a schema node, so nothing compiles a `responsiveStyles` map written in `table`. The slot therefore refuses `table.responsiveStyles` by name, with that reason, on both faces, as it refuses the other node-level keys (objectui#10976). The tolerant face used to keep it unjudged, and the TypeScript slot never declared it.
@@ -0,0 +1,307 @@
+/**
+ * ObjectUI
+ * Copyright (c) 2024-present ObjectStack Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+/**
+ * `flex`, `object-grid` and `object-chart` declare the node-level
+ * `responsiveStyles` that `@objectstack/spec`'s `PageComponentSchema` declares
+ * on every page component, by reference, from the same fragment as the
+ * public-block arms (objectui#10872, batch 9).
+ *
+ * ## The defect these pin
+ *
+ * Batch 8 declared the key on the 30 public-block arms. Objectstack's showcase
+ * and its UI skill also write it on nodes of three arms outside that set:
+ * `flex`, `object-grid` and `object-chart`. That reading is recorded on
+ * objectui#10872, and nothing here re-derives it. `SchemaRenderer` compiles
+ * the key to id-scoped CSS on every node (ADR-0065), but these three arms did
+ * not declare it, so:
+ *
+ *   - the STRICT authoring face refused a spec-valid node by name
+ *     (`unrecognized_keys`), and
+ *   - the TOLERANT face passed it unjudged: `responsiveStyles: 7`, or a
+ *     breakpoint the spec does not have (`md`), parsed clean and styled
+ *     nothing.
+ *
+ * ## What is and is not widened
+ *
+ * The three arms spread the ONE shared fragment the public-block arms spread,
+ * `PAGE_COMPONENT_ENVELOPE`, so the member is the same object on all 33 arms.
+ * The key is NOT declared on `BaseSchema` and NOT on any arm without a measured
+ * producer: `grid`, `stack` and `container` below are the control, and the
+ * whole arm list is read at run time so an arm that gains the member silently
+ * turns this file red. The published TypeScript twins declare it too, as the
+ * spec's `ResponsiveStyles` type by reference, so the mirror-parity census
+ * measures no mirrored-but-undeclared key on these pairs.
+ *
+ * Every verdict is read against the INSTALLED spec at run time: the member is
+ * compared with the spec's own `ResponsiveStylesSchema`, and a refusal is
+ * compared with the issue the spec itself emits for the same value.
+ */
+
+import { describe, expect, it } from 'vitest';
+import type { z } from 'zod';
+import {
+  PageComponentSchema,
+  ResponsiveStylesSchema as SpecResponsiveStylesSchema,
+  type ResponsiveStyles as SpecResponsiveStyles,
+} from '@objectstack/spec/ui';
+
+import {
+  AnyComponentSchema,
+  BaseSchema,
+  FlexSchema,
+  ObjectChartSchema,
+  ObjectGridSchema,
+  ObjectQLPublicBlockComponentSchema,
+  PageSectionBlockSchema,
+  PublicBlockComponentSchema,
+  StrictAnyComponentSchema,
+  safeValidateSchema,
+} from '../zod/index.zod.js';
+import type { FlexSchema as TsFlexSchema, StackSchema as TsStackSchema } from '../layout';
+import type { ObjectChartSchema as TsObjectChartSchema, ObjectGridSchema as TsObjectGridSchema } from '../objectql';
+
+/* ── Type-level pins (compiled by `tsc -p tsconfig.test.json`) ─────────────── */
+
+type Equal<A, B> =
+  (<T>() => T extends A ? 1 : 2) extends (<T>() => T extends B ? 1 : 2) ? true : false;
+type Expect<T extends true> = T;
+type ShapeOf<M> = M extends { shape: infer S } ? S : never;
+type InputOf<T> = T extends z.ZodType ? z.input<T> : never;
+
+/** Each zod arm's member accepts exactly the spec's published type, absent allowed. */
+export type assertionZodMemberIsTheSpecType = [
+  Expect<Equal<InputOf<ShapeOf<typeof FlexSchema>['responsiveStyles']>, SpecResponsiveStyles | undefined>>,
+  Expect<Equal<InputOf<ShapeOf<typeof ObjectGridSchema>['responsiveStyles']>, SpecResponsiveStyles | undefined>>,
+  Expect<Equal<InputOf<ShapeOf<typeof ObjectChartSchema>['responsiveStyles']>, SpecResponsiveStyles | undefined>>,
+];
+/**
+ * Each published TypeScript twin declares the member as the spec's type. Without
+ * the declaration the member resolves through `BaseSchema`'s index signature to
+ * `any`, which `Equal` refuses.
+ */
+export type assertionTsTwinIsTheSpecType = [
+  Expect<Equal<TsFlexSchema['responsiveStyles'], SpecResponsiveStyles | undefined>>,
+  Expect<Equal<TsObjectGridSchema['responsiveStyles'], SpecResponsiveStyles | undefined>>,
+  Expect<Equal<TsObjectChartSchema['responsiveStyles'], SpecResponsiveStyles | undefined>>,
+];
+/**
+ * The helper can FAIL, on the exact shape a missing declaration takes: `stack`
+ * declares no `responsiveStyles`, so the member resolves through the index
+ * signature, and `Equal` refuses it.
+ */
+export type assertionUndeclaredTwinIsRefused = Expect<
+  Equal<Equal<TsStackSchema['responsiveStyles'], SpecResponsiveStyles | undefined>, false>
+>;
+
+/* ── The population ───────────────────────────────────────────────────────── */
+
+type Arm = z.ZodObject;
+const optionsOf = (union: unknown): Arm[] => (union as { options: Arm[] }).options;
+const literalOf = (arm: Arm): string => (arm.shape.type as z.ZodLiteral).value as string;
+
+/** Every arm of the node union with its `type` literals, read off the live union. */
+function armsByLiteral(): Map<string, Arm> {
+  const out = new Map<string, Arm>();
+  const walk = (schema: unknown): void => {
+    const options = (schema as { options?: unknown[] }).options;
+    if (options) {
+      for (const option of options) walk(option);
+      return;
+    }
+    const type = (schema as Arm).shape?.type as { _zod?: { values?: Set<unknown> } } | undefined;
+    for (const value of type?._zod?.values ?? []) out.set(String(value), schema as Arm);
+  };
+  walk(AnyComponentSchema);
+  return out;
+}
+
+/**
+ * The three arms this batch widens: the arms outside the public-block set that
+ * a producer writes `responsiveStyles` on (objectui#10872's batch-9 pull). NAMED,
+ * not derived, because the population is a measurement of producers.
+ */
+const FLAT_ARMS = [
+  ['flex', FlexSchema],
+  ['object-grid', ObjectGridSchema],
+  ['object-chart', ObjectChartSchema],
+] as const;
+
+/** Arms with no producer: the strict face still refuses the key on them. */
+const CONTROL_TYPES = ['grid', 'stack', 'container'] as const;
+
+/** The arm that already declared `dataSource` before this batch (objectui#11070). */
+const DECLARES_DATA_SOURCE: ReadonlySet<string> = new Set(['object-grid']);
+
+/** The five envelope keys the spec declares and this batch leaves undeclared. */
+const UNDECLARED_ENVELOPE = ['events', 'dataSource', 'aria', 'visibility', 'responsive'] as const;
+
+/** A valid flat node per arm, shaped like the producer's nodes, `responsiveStyles` included. */
+const VALID_NODES = {
+  flex: {
+    type: 'flex',
+    id: 'cc_panel',
+    direction: 'col',
+    responsiveStyles: {
+      large: { display: 'block', minWidth: '0', padding: '15px 17px 17px', borderRadius: '16px' },
+      small: { padding: '12px', minHeight: '200px' },
+    },
+    // A nested node carrying the key: judged at depth, through the node recursion.
+    children: [{ type: 'flex', id: 'cc_spacer', responsiveStyles: { large: { flex: '1 1 auto' } } }],
+  },
+  'object-grid': {
+    type: 'object-grid',
+    id: 'cc_queue_g',
+    objectName: 'showcase_task',
+    columns: ['title', 'status'],
+    responsiveStyles: { large: { minWidth: '0', display: 'block' } },
+  },
+  'object-chart': {
+    type: 'object-chart',
+    id: 'cc_status_c',
+    dataset: 'showcase_task_metrics',
+    dimensions: ['status'],
+    values: ['task_count'],
+    chartType: 'bar',
+    responsiveStyles: { large: { width: '100%', minWidth: '0' }, xsmall: { display: 'none' } },
+  },
+} as const;
+
+/** Values the spec refuses: a breakpoint it does not have, a non-object, a non-CSS value. */
+const INVALID_STYLES: ReadonlyArray<readonly [string, unknown]> = [
+  ['a breakpoint the spec does not declare (`md`)', { md: { padding: '8px' } }],
+  ['a number instead of a map', 7],
+  ['a style value that is neither string nor number', { large: { padding: true } }],
+];
+
+type Result = { success: boolean; error?: { issues: z.core.$ZodIssue[] } };
+
+/** Every issue as `{ code, path, message }`. */
+const issuesOf = (result: Result) =>
+  result.success
+    ? []
+    : result.error!.issues.map((issue) => ({ code: issue.code, path: issue.path.join('.'), message: issue.message }));
+
+/** The keys an `unrecognized_keys` issue names, at any depth of a union. */
+function refusedKeys(result: Result): string[] {
+  if (result.success) return [];
+  const collect = (issues: readonly z.core.$ZodIssue[]): string[] =>
+    issues.flatMap((issue) => {
+      if (issue.code === 'unrecognized_keys') return issue.keys;
+      if (issue.code === 'invalid_union') return issue.errors.flatMap((arm) => collect(arm));
+      return [];
+    });
+  return collect(result.error!.issues);
+}
+
+describe('the population (objectui#10872 batch 9)', () => {
+  it('each named arm is the arm the node union selects for its literal', () => {
+    const arms = armsByLiteral();
+    // Non-vacuity: the union is read, and it is the whole node vocabulary.
+    expect(arms.size).toBeGreaterThan(100);
+    for (const [type, arm] of FLAT_ARMS) {
+      expect(literalOf(arm)).toBe(type);
+      expect(arms.get(type)).toBe(arm);
+    }
+    for (const type of CONTROL_TYPES) expect(arms.has(type)).toBe(true);
+  });
+
+  it('the spec declares `responsiveStyles` on a page component of each type (lit control)', () => {
+    for (const [type] of FLAT_ARMS) {
+      const node = { type, responsiveStyles: VALID_NODES[type].responsiveStyles };
+      expect(PageComponentSchema.safeParse(node).success).toBe(true);
+      expect(SpecResponsiveStylesSchema.safeParse(node.responsiveStyles).success).toBe(true);
+    }
+  });
+});
+
+describe('`responsiveStyles` is declared on the three arms, from the public blocks\' fragment (objectui#10872 batch 9)', () => {
+  it.each(FLAT_ARMS)('%s carries the member, and it is the SAME object the public-block arms carry', (_type, arm) => {
+    const shared = PageSectionBlockSchema.shape.responsiveStyles;
+    expect(shared).toBeDefined();
+    expect(arm.shape.responsiveStyles).toBe(shared);
+  });
+
+  it('the member is the spec\'s own map: the same breakpoints, each the spec\'s own value schema', () => {
+    const member = (FlexSchema.shape.responsiveStyles as z.ZodOptional).unwrap() as z.ZodObject;
+    const spec = SpecResponsiveStylesSchema as unknown as z.ZodObject;
+    expect(Object.keys(member.shape).sort()).toEqual(Object.keys(spec.shape).sort());
+    for (const key of Object.keys(spec.shape)) expect(member.shape[key]).toBe(spec.shape[key]);
+  });
+
+  it('exactly the public-block arms and these three declare it: no other arm, and not `BaseSchema`', () => {
+    expect(Object.keys(BaseSchema.shape)).not.toContain('responsiveStyles');
+    const publicBlocks = [
+      ...optionsOf(PublicBlockComponentSchema),
+      ...optionsOf(ObjectQLPublicBlockComponentSchema),
+    ].map(literalOf);
+    const expected = [...publicBlocks, ...FLAT_ARMS.map(([type]) => type)].sort();
+    const declaring = [...armsByLiteral()]
+      .filter(([, arm]) => 'responsiveStyles' in arm.shape)
+      .map(([type]) => type)
+      .sort();
+    expect(declaring).toEqual(expected);
+  });
+
+  it.each(CONTROL_TYPES)('%s (no producer) still refuses it on the strict face, by name', (type) => {
+    const node = { type, responsiveStyles: VALID_NODES.flex.responsiveStyles };
+    expect(refusedKeys(StrictAnyComponentSchema.safeParse(node))).toEqual(['responsiveStyles']);
+  });
+});
+
+describe('a valid `responsiveStyles` is accepted on BOTH faces (objectui#10872 batch 9)', () => {
+  it.each(FLAT_ARMS.map(([type]) => type))('%s: the node parses on both faces, and the map survives unchanged', (type) => {
+    const node = VALID_NODES[type];
+    const tolerant = safeValidateSchema(node);
+    expect(issuesOf(tolerant)).toEqual([]);
+    expect((tolerant.data as { responsiveStyles?: unknown }).responsiveStyles).toEqual(node.responsiveStyles);
+    const strict = StrictAnyComponentSchema.safeParse(node);
+    expect(issuesOf(strict)).toEqual([]);
+    expect((strict.data as { responsiveStyles?: unknown }).responsiveStyles).toEqual(node.responsiveStyles);
+  });
+});
+
+describe('an invalid `responsiveStyles` is refused on BOTH faces, with the spec\'s own issue (objectui#10872 batch 9)', () => {
+  const cases = FLAT_ARMS.flatMap(([type]) => INVALID_STYLES.map(([why, value]) => [type, why, value] as const));
+
+  it.each(cases)('%s — %s', (type, _why, value) => {
+    // The spec's verdict on the same value at a page component of this type,
+    // read at run time. The spec node carries only `type` and the key, so every
+    // issue it reports is about the key.
+    const spec = issuesOf(PageComponentSchema.safeParse({ type, responsiveStyles: value }));
+    expect(spec.length, 'lit control: the spec refuses this value').toBeGreaterThan(0);
+    expect(spec.every((issue) => issue.path.startsWith('responsiveStyles'))).toBe(true);
+    const node = { ...VALID_NODES[type], responsiveStyles: value };
+    expect(issuesOf(safeValidateSchema(node))).toEqual(spec);
+    expect(issuesOf(StrictAnyComponentSchema.safeParse(node))).toEqual(spec);
+  });
+});
+
+describe('the other five envelope keys stay undeclared on the three arms (objectui#10872 batch 9)', () => {
+  it('no arm gained any of them: `dataSource` only where objectui#11070 declared it', () => {
+    const declared = FLAT_ARMS.flatMap(([type, arm]) =>
+      UNDECLARED_ENVELOPE.filter((key) => key in arm.shape).map((key) => `${type}#${key}`),
+    ).sort();
+    expect(declared).toEqual([...DECLARES_DATA_SOURCE].map((type) => `${type}#dataSource`));
+  });
+
+  const cases = FLAT_ARMS.flatMap(([type]) =>
+    UNDECLARED_ENVELOPE.filter((key) => !(key === 'dataSource' && DECLARES_DATA_SOURCE.has(type))).map(
+      (key) => [type, key] as const,
+    ),
+  );
+
+  it.each(cases)('%s: a node-level `%s` is still refused on the strict face, by name', (type, key) => {
+    // The valid node without the key under test and without a nested child, so
+    // the only refusal left is the one this row asks about.
+    const { responsiveStyles: _styles, ...rest } = VALID_NODES[type] as Record<string, unknown>;
+    const { children: _children, ...bare } = rest;
+    const node = { ...bare, [key]: { x: 1 } };
+    expect(refusedKeys(StrictAnyComponentSchema.safeParse(node))).toEqual([key]);
+  });
+});
@@ -301,7 +301,8 @@ const IMPORTED: Array<readonly [string, z.ZodType]> = [
   ['ElementDataSourceSchema', SpecElementDataSourceSchema],
   // objectui#10872 batch 8: every public-block arm declares the node-level
   // `responsiveStyles` as the spec's `ResponsiveStylesSchema` (one shared
-  // `PUBLIC_BLOCK_ENVELOPE`), crossed through this boundary like every other
+  // `NODE_ENVELOPE`, which batch 9 also spread into `flex`, `object-grid` and
+  // `object-chart`), crossed through this boundary like every other
   // read. It carries no default and reaches no `z.lazy`, so the strip is the
   // identity function — the row is here because the census below requires
   // every imported symbol to be measured, not because the strip does work.