docs(plugin-form): name object-master-detail-form in the formType input; drop SplitForm from the export list

The registered input's prescription now matches the spec's; the
manifest and component reference are regenerated. The frontend
plugin-form page no longer lists SplitForm / SplitFormSchema, and the
platform checklist records the split keys as refused at parse.

Claude-Session: https://claude.ai/code/session_01JQwxbWHWPRD5rZXeY69YvL
Co-authored-by: Claude <noreply@anthropic.com>

Author: claude

content/docs/frontend/plugins/plugin-form.mdx

@@ -74,8 +74,7 @@ its `schema`, but never a `dataSource` — that travels on
 one or wraps the component the same way.
 
 The components are on the package's export surface — `ObjectForm`,
-`TabbedForm`, `WizardForm`, `SplitForm`, `DrawerForm`, `ModalForm`,
-`EmbeddableForm`, `MasterDetailForm`, `LineItemsPanel`, `FormAnalytics`,
+`TabbedForm`, `WizardForm`, `DrawerForm`, `ModalForm`, `EmbeddableForm`, `MasterDetailForm`, `LineItemsPanel`, `FormAnalytics`,
 `FormSectionContainer` — alongside the layout helpers (`applyAutoLayout`,
 `inferColumns`, `filterCreateModeFields`, …) and the per-container schema types
 (`TabbedFormSchema`, `WizardFormSchema`, `ModalFormSchema`, …). There is no
@@ -103,7 +102,7 @@ The plugin supports these field types:
 `@object-ui/types` alongside the rest of the JSON contract. This package imports
 them and does not re-export them — the form types on its own entry are the
 per-container ones (`TabbedFormSchema`, `WizardFormSchema`, `ModalFormSchema`,
-`SplitFormSchema`, `DrawerFormSchema`, `MasterDetailFormSchema`).
+`DrawerFormSchema`, `MasterDetailFormSchema`).
 
 ```typescript
 import type { FormSchema, FormField } from '@object-ui/types';

content/docs/ui/components/plugins.mdx

@@ -130,7 +130,7 @@ Namespace `plugin-form`.
 | `objectName` | `string` |  | Object this form creates or edits. Not required: the node's `dataSource` binding can name the object instead, and `dataSource.object` lands on this key, outranking an authored value. With neither, and no inline fields (non-empty `customFields`, or `sections` whose every field is inline), the form shows a hint naming this key instead of a form with no fields. |
 | `fields` | `array` |  | Bare field names to show, in order (each looked up in the object schema). NOT the same vocabulary as `sections[].fields`, which also accepts the spec `FormFieldSchema` object (identity key `field`, e.g. `{ field: "note", colSpan: 2 }`) — that shape resolves to no name HERE and is silently skipped (SimpleObjectForm in ObjectForm.tsx; buildFlatFields in flatFields.ts for the drawer/modal presentations). |
 | `mode` | `enum`: `create`, `edit`, `view` |  | — |
-| `formType` | `enum`: `simple`, `tabbed`, `wizard`, `drawer`, `modal` |  | The form layout (`simple`, `tabbed`, `wizard`), or the container the block opens it in (`drawer`, `modal`, drawn as a stacked form; `contentLayout: "tabbed"` puts a modal's sections on tabs). `split` was retired with ADR-0050: use `tabbed`, or `subforms` to edit child records beside the parent. |
+| `formType` | `enum`: `simple`, `tabbed`, `wizard`, `drawer`, `modal` |  | The form layout (`simple`, `tabbed`, `wizard`), or the container the block opens it in (`drawer`, `modal`, drawn as a stacked form; `contentLayout: "tabbed"` puts a modal's sections on tabs). `split` was retired with ADR-0050: use `tabbed` (one tab per section), or an `object-master-detail-form` block to edit child records beside the parent. |
 | `sections` | `array` |  | — |
 | `title` | `string` \| `object` |  | Heading of the drawer and modal presentations (`formType: "drawer"` / `"modal"`). Accepts either a plain string or an inline per-locale map (`{ en: "New order", "zh-CN": "新建订单" }`) — the `I18nLabel` union the contract admits on this key — and the form resolves the map against the active UI language, falling back through base language, a region-qualified sibling, `default`, then `en`, and finally to any remaining entry. |
 | `description` | `string` \| `object` |  | Subtitle under the drawer and modal heading. Accepts either a plain string or an inline per-locale map (`{ en: "Enter the order details", "zh-CN": "填写订单信息" }`), resolved against the active UI language with the same fallback chain as `title`. |

docs/qa/platform-checklist/areas/studio-authoring.json

@@ -3781,7 +3781,7 @@
         "flow.errorHandling { strategy, maxRetries } → maxRetries 2 yields three failed attempts",
         "flow.nodes[].inputSchema → stored and served",
         "view.list: searchableFields, userFilters, resizable, compactToolbar, selection, pagination, rowHeight, grouping, rowColor, hiddenFields, fieldOrder, rowActions, bulkActions, conditionalFormatting, inlineEdit, exportOptions (needs an export grant), appearance, addRecord, showRecordCount, allowPrinting, emptyState → each renders as its key describes (gap-view card, 3fcafcd3)",
-        "view.form: groups, subforms, submitBehavior, modalSize, allowSkip, showStepIndicator, splitDirection / splitSize / splitResizable → render as described; buttons, layout, drawerSide, drawerWidth: FAIL today (knownGaps[0]); defaults, defaultTab, tabPosition: partial",
+        "view.form: groups, subforms, submitBehavior, modalSize, allowSkip, showStepIndicator → render as described; splitDirection / splitSize / splitResizable → refused at parse (retired in @objectstack/spec 18.3.0 with the split form, ADR-0050); buttons, layout, drawerSide, drawerWidth: FAIL today (knownGaps[0]); defaults, defaultTab, tabPosition: partial",
         "dashboard.requiredPermissions → a viewer without the capability is refused the dashboard",
         "dataset (Studio has no dataset editor): include, dimensions with nullLabel, measures count / sum / avg / filtered / ratio, currency format → a report bound to it shows the null bucket labelled and each measure's value",
         "permission.description / isDefault / allowExport / rowLevelSecurity[].positions → the Setup list shows the description; isDefault raises a suggestion; allowExport → export 200 with it, 403 EXPORT_NOT_PERMITTED without; positions limit the policy to holders of the position"

scripts/sdui-manifest.record.json

@@ -13,8 +13,8 @@
   ],
   "source": "built-tree",
   "generator": "scripts/gen-sdui-manifest-node.mjs",
-  "generatedAt": "2026-10-28",
-  "sha256": "760674a43020360142d94b2a8e051faa0d4cf640479a3d7ca4efb51f59f91fc4",
+  "generatedAt": "2026-10-29",
+  "sha256": "efb88be5cfc185dfff300363ebcc0fbd67e76983e8f4b2c673fae1efa4ecba0b",
   "components": 106,
   "inTree": {
     "modulesRoot": "ui/apps/console",

sdui.manifest.json

@@ -485,7 +485,7 @@
             "drawer",
             "modal"
           ],
-          "description": "The form layout (`simple`, `tabbed`, `wizard`), or the container the block opens it in (`drawer`, `modal`, drawn as a stacked form; `contentLayout: \"tabbed\"` puts a modal's sections on tabs). `split` was retired with ADR-0050: use `tabbed`, or `subforms` to edit child records beside the parent."
+          "description": "The form layout (`simple`, `tabbed`, `wizard`), or the container the block opens it in (`drawer`, `modal`, drawn as a stacked form; `contentLayout: \"tabbed\"` puts a modal's sections on tabs). `split` was retired with ADR-0050: use `tabbed` (one tab per section), or an `object-master-detail-form` block to edit child records beside the parent."
         },
         {
           "name": "sections",

ui/packages/plugin-form/src/index.tsx

@@ -296,7 +296,7 @@ ComponentRegistry.register('object-form', ObjectFormRenderer, {
     { ...OBJECT_FORM_OBJECT_NAME_INPUT },
     { name: 'fields', type: 'array', description: 'Bare field names to show, in order (each looked up in the object schema). NOT the same vocabulary as `sections[].fields`, which also accepts the spec `FormFieldSchema` object (identity key `field`, e.g. `{ field: "note", colSpan: 2 }`) — that shape resolves to no name HERE and is silently skipped (SimpleObjectForm in ObjectForm.tsx; buildFlatFields in flatFields.ts for the drawer/modal presentations).' },
     { name: 'mode', type: 'enum', enum: ['create', 'edit', 'view'] },
-    { name: 'formType', type: 'enum', enum: ['simple', 'tabbed', 'wizard', 'drawer', 'modal'], description: 'The form layout (`simple`, `tabbed`, `wizard`), or the container the block opens it in (`drawer`, `modal`, drawn as a stacked form; `contentLayout: "tabbed"` puts a modal\'s sections on tabs). `split` was retired with ADR-0050: use `tabbed`, or `subforms` to edit child records beside the parent.' },
+    { name: 'formType', type: 'enum', enum: ['simple', 'tabbed', 'wizard', 'drawer', 'modal'], description: 'The form layout (`simple`, `tabbed`, `wizard`), or the container the block opens it in (`drawer`, `modal`, drawn as a stacked form; `contentLayout: "tabbed"` puts a modal\'s sections on tabs). `split` was retired with ADR-0050: use `tabbed` (one tab per section), or an `object-master-detail-form` block to edit child records beside the parent.' },
     { name: 'sections', type: 'array' },
     // The row's seven `I18nLabel` members (`ComponentPropsMap['object-form']`):
     // `title`, `description` here, and `submitText`, `cancelText`, `nextText`,