@@ -0,0 +1,21 @@
+---
+'@object-ui/core': minor
+'@object-ui/permissions': minor
+'@object-ui/plugin-detail': patch
+'@object-ui/plugin-grid': patch
+---
+
+In-place edit on the record page and a list's in-cell edit honour the caller's field write grant, and the owner field honours the transfer grant (objectui#12103).
+
+**What a caller saw.** A caller whose permission set marks a field `{ readable: true, editable: false }` was offered an editor for it in the record page's details body, in its highlights strip and in a list's grid cells, and Save answered 403 ("Field write denied"). The owner field was offered the same way to a caller without the transfer grant, and Save answered 403 ("requires the transfer grant"). Edit forms already refused both fields through `fieldWriteGate`.
+
+**What changed.**
+
+- **The map (`@object-ui/core`).** The `recordEdit` and `listInlineEdit` rows of `AFFORDANCE_GRANTS` gain `field: 'write'`, so the record page's in-place edit and a list's in-cell edit each ask every field the same update question an edit form asks, through `resolveFieldAffordance`. `FieldAffordance` therefore includes both rows.
+- **The details body and the highlights strip (`@object-ui/plugin-detail`).** `DetailSection` and `HeaderHighlight` ask that question of each field. A refused field shows no pencil, does not enter the edit session on double-click, and stays a read display in edit mode. The strip and the body share one session and one Save, so they answer alike.
+- **The grid (`@object-ui/plugin-grid`).** `ObjectGrid` marks a refused field's column not editable, so its cell keeps the read display while the rest of the row edits. Whether the grid is editable at all is still the object-level `listInlineEdit` verdict.
+- **The owner field (`@object-ui/permissions`).** The server refuses an update that writes the record's owner (the field the `@objectstack/spec` constant `SystemFieldName` names `OWNER_ID`) unless the caller holds `allowTransfer` or `modifyAllRecords`. `MePermissionsProvider`'s `checkField(object, owner, 'write')` now answers with that grant, read with the spec's `objectPermissionGrants`. The `write` question is the server's update rule for a field, so every surface that asks it (edit forms, in-place edit, in-cell edit) offers the owner field only to a caller who may transfer the record. `checkField(object, owner, 'create')` is unchanged, because on insert the server stamps an empty owner to the caller and accepts the caller's own id. `MePermissionsResponse` declares the `allowTransfer` bit the endpoint already serves, and `@object-ui/permissions` now depends on `@objectstack/spec` directly.
+
+**Unchanged.** With no permission provider mounted no field question is asked, so a standalone embed and the designer preview behave as before. The server still enforces every grant; this only stops the console from offering a write it would refuse.
+
+**Clause-②: yes (widening).** `AFFORDANCE_GRANTS.recordEdit` and `AFFORDANCE_GRANTS.listInlineEdit` gain a `field: 'write'` member, which widens the `FieldAffordance` type by those two rows. `MePermissionsResponse`'s object entry declares an optional `allowTransfer?: boolean`. `checkField`'s action union is unchanged; its `write` answer narrows for the owner field only. No export, prop or language-pack key is added or removed.
@@ -187,7 +187,13 @@ row's Delete, and the rest — reads the grant it exercises from ONE table,
 `AFFORDANCE_GRANTS` (objectui#12082). A row names the CRUD-affordance bit the
 affordance needs, the object grant it exercises (`create`, `update` or
 `delete`) and, for an affordance that offers fields, the field question it asks
-(`create` for an insert, `write` for an update).
+(`create` for an insert, `write` for an update). The fields of a form, of the
+record page's in-place edit (`recordEdit`) and of a list's in-cell edit
+(`listInlineEdit`) each ask that question, so a field the caller's permission
+set marks `editable: false` is offered read-only on every one of them
+(objectui#12103). The `write` question is the server's whole update rule for a
+field, so for the record's owner field it also needs the transfer grant
+(`allowTransfer`, or `modifyAllRecords`).
 
 `resolveAffordance` is the one verdict: the object's managed-object policy, the
 server's effective API operation set and the caller's grant must all allow it,
 
@@ -47,6 +47,16 @@
  * way for both questions. So a create form follows what the server enforces on
  * insert, and adds no rule the server does not have.
  *
+ * The `write` question is the server's whole update rule for the field, so it
+ * also carries the one field whose update needs an OBJECT grant beyond
+ * `allowEdit`: the record's owner, the field the spec's `SystemFieldName`
+ * constant names `OWNER_ID`. The server refuses an update that writes it without
+ * the transfer grant (`allowTransfer`, or `modifyAllRecords`), so the resolver
+ * answers `write` for it with that grant too (objectui#12103). Every row that
+ * asks `write` therefore offers the owner field only to a caller who may
+ * transfer the record — the in-place edit, the list's in-cell edit and an edit
+ * form alike, with no row of its own to forget.
+ *
  * ## The verdict
  *
  * An affordance shows when the managed-object policy, the effective API
@@ -120,8 +130,12 @@ export const AFFORDANCE_GRANTS = {
   createFormFields: { crud: 'create', grant: 'create', field: 'create' },
   /** An edit form's fields (every `ObjectForm` layout) and its form-wide lock. */
   editFormFields: { crud: 'edit', grant: 'update', field: 'write' },
-  /** The record page's Edit — the header CTA and the record body's in-place editing. */
-  recordEdit: { crud: 'edit', grant: 'update' },
+  /**
+   * The record page's Edit — the header CTA and the record body's in-place
+   * editing (the details body and the highlights strip), each of whose fields
+   * asks the update question (objectui#12103).
+   */
+  recordEdit: { crud: 'edit', grant: 'update', field: 'write' },
   /** The record page's Delete. */
   recordDelete: { crud: 'delete', grant: 'delete' },
   /**
@@ -133,8 +147,8 @@ export const AFFORDANCE_GRANTS = {
   listImport: { crud: 'import', grant: 'create', field: 'create' },
   /** The import wizard's template download — its endpoint answers 403 without the create grant. */
   importTemplate: { crud: null, grant: 'create' },
-  /** A list's inline (in-cell) editing. */
-  listInlineEdit: { crud: 'edit', grant: 'update' },
+  /** A list's inline (in-cell) editing, each of whose cells asks the update question (objectui#12103). */
+  listInlineEdit: { crud: 'edit', grant: 'update', field: 'write' },
   /** A list's bulk Delete. */
   listBulkDelete: { crud: 'delete', grant: 'delete' },
   /** A grid row's Edit. */
 
@@ -148,6 +148,14 @@ such a field through and object admission decides, so `'write'` falls back to
 the object's `allowEdit` and `'create'` to its `allowCreate`. An explicit
 field-level entry answers both the same way.
 
+One field's update needs more than its own grant: the record's owner, the
+field the spec's `SystemFieldName` constant names `OWNER_ID`. The server refuses an
+update that writes it unless the caller holds the transfer grant
+(`allowTransfer`, or `modifyAllRecords`), so `MePermissionsProvider` answers
+`'write'` for the owner field with that grant as well (objectui#12103).
+`'create'` is unchanged: on insert the server stamps an empty owner to the
+caller and accepts the caller's own id.
+
 ```tsx
 import { usePermissions } from '@object-ui/permissions';
 
 
@@ -37,7 +37,8 @@
     "react": "^18.0.0 || ^19.0.0"
   },
   "dependencies": {
-    "@object-ui/types": "workspace:*"
+    "@object-ui/types": "workspace:*",
+    "@objectstack/spec": "^17.7.0"
   },
   "devDependencies": {
     "@types/react": "19.2.18",
 
@@ -19,6 +19,8 @@ import type {
   PermissionCheckResult,
   FieldLevelPermission,
 } from '@object-ui/types';
+import { objectPermissionGrants } from '@objectstack/spec/security';
+import { SystemFieldName } from '@objectstack/spec/system';
 import { PermCtx, type PermissionContextValue } from './PermissionContext.js';
 import { createDiscardProofCache } from './discardProofCache.js';
 
@@ -42,6 +44,13 @@ export interface MePermissionsResponse {
     allowDelete?: boolean;
     viewAllRecords?: boolean;
     modifyAllRecords?: boolean;
+    /**
+     * The transfer grant: may the caller change a record's owner. The server
+     * refuses an update that writes the owner field without it (or without
+     * `modifyAllRecords`, which implies it), and `checkField` reads it for that
+     * field's `write` question (objectui#12103).
+     */
+    allowTransfer?: boolean;
     /**
      * [objectstack#3391] Server-resolved effective API operation set for this object
      * (enum-ordered). Present only when the object tightens exposure via
@@ -307,6 +316,23 @@ export function MePermissionsProvider({
       const objKey = (object ?? '').toLowerCase();
       const key = `${objKey}.${field}`;
       const fieldPerm = data.fields?.[key] ?? data.fields?.[`${object}.${field}`];
+      const objPerm = data.objects?.[objKey] ?? data.objects?.[object] ?? data.objects?.['*'];
+      // [objectui#12103] An update that writes the record's OWNER is a
+      // transfer: the server's security step refuses it unless the caller holds
+      // the transfer grant, whatever the field's own entry says. So `write` for
+      // that field needs the grant too, read with the spec's own predicate
+      // (`allowTransfer`, or `modifyAllRecords`, which implies it). The field is
+      // the one the spec names, as the server's guard keys it. `create` is not
+      // narrowed: on insert the server stamps an empty owner to the caller and
+      // accepts the caller's own id. An object the answer does not mention
+      // takes the unknown-object default below.
+      if (
+        action === 'write' &&
+        field === SystemFieldName.OWNER_ID &&
+        !(objPerm ? objectPermissionGrants(objPerm, 'allowTransfer') : data.authenticated !== true)
+      ) {
+        return false;
+      }
       // An explicit entry answers `write` and `create` alike: the server's
       // field step refuses a non-editable field on insert and update both.
       if (fieldPerm) {
@@ -318,7 +344,6 @@ export function MePermissionsProvider({
       // field step lets the field through and object admission decides, so
       // the answer is the grant of the operation asked about (objectui#12082)
       // — `allowCreate` on an insert, `allowEdit` on an update.
-      const objPerm = data.objects?.[objKey] ?? data.objects?.[object] ?? data.objects?.['*'];
       if (!objPerm) {
         // [objectstack-ai/objectstack#2926 ④] Unknown-object default is authentication-gated:
         //  - authenticated session → fail-CLOSED. The server resolved this
 
@@ -21,6 +21,10 @@ export interface PermissionContextValue {
    * permission set does not mention: the server's field step lets it through
    * and object admission decides — `allowEdit` on an update, `allowCreate` on
    * an insert. An explicit field-level entry answers both the same way.
+   *
+   * `write` is the server's whole update rule, so for the record's owner field
+   * (`SystemFieldName.OWNER_ID`) it also needs the transfer grant — the server
+   * refuses an update that writes the owner without it (objectui#12103).
    */
   checkField: (object: string, field: string, action: 'read' | 'write' | 'create') => boolean;
   /** Get field permissions for an object */
 
@@ -0,0 +1,93 @@
+/**
+ * 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.
+ */
+
+/**
+ * objectui#12103 — `checkField(object, owner, 'write')` answers the server's
+ * whole update rule for the owner field, which includes the transfer grant.
+ *
+ * The server's security step refuses an update that writes the record's owner
+ * (`SystemFieldName.OWNER_ID`) unless the caller holds `allowTransfer` or
+ * `modifyAllRecords`; measured on a live backend, `/me/permissions` reports the
+ * grant per object and the refusal is a 403. So the `write` question for that
+ * one field needs the grant, read with the spec's own predicate, while `create`
+ * (the insert rule, which stamps and accepts the caller's own id), `read`, and
+ * every other field are untouched.
+ */
+
+import { describe, it, expect, afterEach } from 'vitest';
+import { render, cleanup } from '@testing-library/react';
+import React from 'react';
+import { SystemFieldName } from '@objectstack/spec/system';
+import { MePermissionsProvider, type MePermissionsResponse } from '../MePermissionsProvider';
+import { usePermissions } from '../usePermissions';
+import type { PermissionContextValue } from '../PermissionContext';
+
+afterEach(cleanup);
+
+const OBJECT = 'crm_account';
+const OWNER = SystemFieldName.OWNER_ID;
+const EDITOR = { allowRead: true, allowCreate: true, allowEdit: true, allowDelete: false };
+
+function envelope(
+  objects: MePermissionsResponse['objects'],
+  fields: MePermissionsResponse['fields'] = {},
+  authenticated = true,
+): MePermissionsResponse {
+  return { authenticated, userId: authenticated ? 'u1' : null, tenantId: null, roles: [], permissionSets: [], objects, fields };
+}
+
+function checkFieldUnder(perms: MePermissionsResponse): PermissionContextValue['checkField'] {
+  let captured: PermissionContextValue['checkField'] | null = null;
+  function Probe() {
+    captured = usePermissions().checkField;
+    return null;
+  }
+  render(
+    <MePermissionsProvider initialPermissions={perms}>
+      <Probe />
+    </MePermissionsProvider>,
+  );
+  if (!captured) throw new Error('the probe did not render');
+  return captured;
+}
+
+describe("checkField's write question for the owner field (objectui#12103)", () => {
+  it('is refused without the transfer grant — false and absent alike', () => {
+    expect(checkFieldUnder(envelope({ [OBJECT]: { ...EDITOR, allowTransfer: false } }))(OBJECT, OWNER, 'write')).toBe(false);
+    expect(checkFieldUnder(envelope({ [OBJECT]: { ...EDITOR } }))(OBJECT, OWNER, 'write')).toBe(false);
+  });
+
+  it('is granted by allowTransfer, and by modifyAllRecords, which implies it', () => {
+    expect(checkFieldUnder(envelope({ [OBJECT]: { ...EDITOR, allowTransfer: true } }))(OBJECT, OWNER, 'write')).toBe(true);
+    expect(checkFieldUnder(envelope({ [OBJECT]: { ...EDITOR, modifyAllRecords: true } }))(OBJECT, OWNER, 'write')).toBe(true);
+  });
+
+  it('reads the wildcard entry for an object the answer does not name, as the object fallback does', () => {
+    expect(checkFieldUnder(envelope({ '*': { ...EDITOR, modifyAllRecords: true } }))(OBJECT, OWNER, 'write')).toBe(true);
+    expect(checkFieldUnder(envelope({ '*': { ...EDITOR, allowTransfer: false } }))(OBJECT, OWNER, 'write')).toBe(false);
+  });
+
+  it('keeps the unknown-object default: closed for a signed-in caller, open for an anonymous one', () => {
+    expect(checkFieldUnder(envelope({}))(OBJECT, OWNER, 'write')).toBe(false);
+    expect(checkFieldUnder(envelope({}, {}, false))(OBJECT, OWNER, 'write')).toBe(true);
+  });
+
+  it("an explicit editable: false entry still refuses it with the grant; the grant does not open the field's own refusal", () => {
+    const check = checkFieldUnder(
+      envelope({ [OBJECT]: { ...EDITOR, allowTransfer: true } }, { [`${OBJECT}.${OWNER}`]: { readable: true, editable: false } }),
+    );
+    expect(check(OBJECT, OWNER, 'write')).toBe(false);
+  });
+
+  it('CONTROL: create, read and every other field are untouched by the transfer grant', () => {
+    const check = checkFieldUnder(envelope({ [OBJECT]: { ...EDITOR, allowTransfer: false } }));
+    expect(check(OBJECT, OWNER, 'create')).toBe(true);
+    expect(check(OBJECT, OWNER, 'read')).toBe(true);
+    expect(check(OBJECT, 'name', 'write')).toBe(true);
+  });
+});
@@ -27,6 +27,8 @@ import {
 } from '@object-ui/components';
 import { ChevronDown, ChevronRight, Copy, Check, Eye, EyeOff, Pencil } from 'lucide-react';
 import { SchemaRenderer, toRenderableSchema, useInlineEdit } from '@object-ui/react';
+import { resolveFieldAffordance } from '@object-ui/core';
+import { usePermissions } from '@object-ui/permissions';
 import {
   getCellRenderer,
   resolveCellRendererType,
@@ -167,6 +169,12 @@ export const DetailSection: React.FC<DetailSectionProps> = ({
    * session to read, exactly as it has no draft.
    */
   const serverFieldErrors = useInlineEdit()?.fieldErrors ?? null;
+  /**
+   * The caller's permissions, for the field question in-place edit asks of each
+   * field (objectui#12103). With no provider mounted `isLoaded` is false and
+   * the question is not asked, so a bare `DetailSection` behaves as before.
+   */
+  const perms = usePermissions();
 
   /**
    * What the copy affordance WRITES (objectui#8395).
@@ -378,7 +386,16 @@ export const DetailSection: React.FC<DetailSectionProps> = ({
     // clipboard are the READ direction of the same refusal, and `isInlineExcluded`
     // (objectui#4221) already holds the WRITE direction of it.
     const isMaskedField = isMaskedDetailFieldType(field.type, objectDefField?.type);
-    const fieldEditable = !isReadonly && !isComputedField && !isSystemField && !isInlineExcluded;
+    // The CALLER's write grant on this field (objectui#12103): the field
+    // question of the `recordEdit` row of the affordance-to-grant map, the same
+    // `write` question an edit form asks (`fieldWriteGate`). A field the
+    // permission set marks `editable: false` — or the owner field without the
+    // transfer grant — stays a read display, so in-place edit never offers a
+    // write the server refuses with 403. The flags above are the object's; this
+    // one is the principal's, and it only narrows.
+    const isWriteGranted = !objectName || resolveFieldAffordance('recordEdit', perms, objectName, field.name);
+    const fieldEditable =
+      !isReadonly && !isComputedField && !isSystemField && !isInlineExcluded && isWriteGranted;
     const canInlineEditField = fieldEditable && !!onEnterInlineEdit;
 
     const displayValue = (() => {