diff --git a/.changeset/8478-zod-pins-form-layout.md b/.changeset/8478-zod-pins-form-layout.md
new file mode 100644
index 0000000000..ef20669cd0
--- /dev/null
+++ b/.changeset/8478-zod-pins-form-layout.md
@@ -0,0 +1,24 @@
+---
+'@object-ui/types': patch
+---
+
+Remove stale source-line citations (`NAME.ext:NNN`) from eleven published `.describe()`
+schema descriptions in `packages/types/src/zod/form.zod.ts` (9) and
+`zod/layout.zod.ts` (2) (objectstack-ai/objectui#8478).
+
+Text only — no accept-set, key, or shape change. Each description was either trimmed to
+its author-useful sentence with no loss (e.g. dropping "read at
+renderers/form/file-upload.tsx:78" from an "appended to the renderer's own grid classes"
+sentence that stands on its own), or rewritten to cite the same fact by identifier or
+behavior instead of by file:line (e.g. "sets `required` on the Radix Checkbox and gates
+the label's `*` marker" instead of "read at renderers/form/checkbox.tsx:45 ... and :49"),
+which survives a line renumbering that a bare address would not.
+
+Two of the eleven addresses removed here were measured to have already drifted by the
+same +3 lines: `checkbox.tsx:45`/`:49` (actual `required=` site now `:48`, actual `*`
+marker site now `:52`) and `text.tsx:162,167` (actual `{schema.content}` sites now
+`:165`/`:170`). Filed back on objectstack-ai/objectui#8478 as further drift evidence for
+its own pre-committed p3-to-p2 re-grade trigger.
+
+The remaining 6 addresses (`zod/complex.zod.ts`) stay out of scope for this PR — held by
+in-flight PR objectstack-ai/objectui#8799 — and the card does not close here.
diff --git a/packages/types/src/zod/form.zod.ts b/packages/types/src/zod/form.zod.ts
index a5fc0eb5b0..ec2a40a718 100644
--- a/packages/types/src/zod/form.zod.ts
+++ b/packages/types/src/zod/form.zod.ts
@@ -252,7 +252,7 @@ export const TextareaSchema = BaseSchema.extend({
   description: z.string().optional().describe('Help text'),
   error: z.string().optional().describe('Error message'),
   wrapperClass: z.string().optional()
-    .describe('Classes on the wrapper div around the textarea and its label, read at renderers/form/textarea.tsx:37 — `cn("grid w-full gap-1.5", schema.wrapperClass)` (objectui#7722)'),
+    .describe('Classes on the wrapper div around the textarea and its label (objectui#7722)'),
   onChange: handlerKeyRefusal('onChange', 'runtime-slot', 'Change handler'),
   maxLength: z.number().optional().describe('Maximum length'),
 });
@@ -272,7 +272,7 @@ export const SelectSchema = BaseSchema.extend({
   description: z.string().optional().describe('Help text'),
   error: z.string().optional().describe('Error message'),
   wrapperClass: z.string().optional()
-    .describe('Classes on the wrapper div around the trigger and its label, read at renderers/form/select.tsx:45 — `cn("grid w-full items-center gap-1.5", schema.wrapperClass)` (objectui#7722)'),
+    .describe('Classes on the wrapper div around the trigger and its label (objectui#7722)'),
   onChange: handlerKeyRefusal('onChange', 'runtime-slot', 'Change handler'),
 });
 
@@ -286,9 +286,9 @@ export const CheckboxSchema = BaseSchema.extend({
   defaultChecked: z.boolean().optional().describe('Default checked state'),
   checked: z.boolean().optional().describe('Controlled checked state'),
   required: z.boolean().optional()
-    .describe("Required affordance, read at renderers/form/checkbox.tsx:45 (`required=` on the Radix Checkbox) and :49 (gates the label's `*` marker) (objectui#6150)"),
+    .describe("Required affordance — sets `required` on the Radix Checkbox and gates the label's `*` marker (objectui#6150)"),
   wrapperClass: z.string().optional()
-    .describe('Classes on the wrapper div around the box and its label, read at renderers/form/checkbox.tsx:36 — `cn("flex items-center space-x-2", schema.wrapperClass)` (objectui#6938)'),
+    .describe('Classes on the wrapper div around the box and its label (objectui#6938)'),
   description: z.string().optional().describe('Help text'),
   error: z.string().optional().describe('Error message'),
   onChange: handlerKeyRefusal('onChange', 'runtime-slot', 'Change handler'),
@@ -321,7 +321,7 @@ export const SwitchSchema = BaseSchema.extend({
   checked: z.boolean().optional().describe('Controlled checked state'),
   description: z.string().optional().describe('Help text'),
   wrapperClass: z.string().optional()
-    .describe("Classes on the wrapper div around the switch and its label, read at renderers/form/switch.tsx:26 — `flex items-center space-x-2 ${schema.wrapperClass || ''}` (objectui#7722)"),
+    .describe("Classes on the wrapper div around the switch and its label (objectui#7722)"),
   onChange: handlerKeyRefusal('onChange', 'retired', 'Change handler'),
 });
 
@@ -363,9 +363,9 @@ export const FileUploadSchema = BaseSchema.extend({
   name: z.string().optional().describe('Field name for form submission'),
   label: z.string().optional().describe('Upload label'),
   buttonText: z.string().optional()
-    .describe('Drop-zone label, read at renderers/form/file-upload.tsx:123 — `schema.buttonText || "DROP PAYLOAD OR CLICK TO UPLOAD"` (objectui#6150)'),
+    .describe('Drop-zone label; falls back to "DROP PAYLOAD OR CLICK TO UPLOAD" when unset (objectui#6150)'),
   wrapperClass: z.string().optional()
-    .describe('Outer wrapper classes, appended to the renderer\'s own grid classes at renderers/form/file-upload.tsx:78 (objectui#6150)'),
+    .describe('Outer wrapper classes, appended to the renderer\'s own grid classes (objectui#6150)'),
   accept: z.string().optional().describe('Accepted file types'),
   multiple: z.boolean().optional().describe('Allow multiple files'),
   maxSize: z.number().optional().describe('Maximum file size (bytes)'),
@@ -391,7 +391,7 @@ export const DatePickerSchema = BaseSchema.extend({
   description: z.string().optional().describe('Help text'),
   error: z.string().optional().describe('Error message'),
   wrapperClass: z.string().optional()
-    .describe("Classes on the wrapper div around the popover trigger and its label, read at renderers/form/date-picker.tsx:35 — `grid w-full max-w-sm items-center gap-1.5 ${schema.wrapperClass || ''}` (objectui#7722)"),
+    .describe("Classes on the wrapper div around the popover trigger and its label (objectui#7722)"),
   onChange: handlerKeyRefusal('onChange', 'runtime-slot', 'Change handler'),
 });
 
@@ -724,7 +724,7 @@ export const InputShorthandSchema = InputSchema.omit({ type: true, inputType: tr
   // second ledger row for a key that is demonstrably read; shrinking the existing
   // row is `InputSchema`'s own repair (objectui#7722's family) and not this card's.
   wrapperClass: z.string().optional()
-    .describe("Classes on the wrapper div around the input and its label, read at renderers/form/input.tsx:42 — `cn('grid w-full items-center gap-1.5', schema.wrapperClass)`"),
+    .describe("Classes on the wrapper div around the input and its label"),
 });
 
 /**
diff --git a/packages/types/src/zod/layout.zod.ts b/packages/types/src/zod/layout.zod.ts
index cc5b6a21db..ab0fd93dc4 100644
--- a/packages/types/src/zod/layout.zod.ts
+++ b/packages/types/src/zod/layout.zod.ts
@@ -93,7 +93,7 @@ export const TextSpanSchema = BaseSchema.extend({
 export const TextSchema = BaseSchema.extend({
   type: z.literal('text'),
   content: z.string().optional()
-    .describe('Text content — the one content spelling `text` reads, at renderers/basic/text.tsx:162,167 as `{schema.content}` (declared by objectui#6150; its `value` fallback spelling was retired by objectui#6951)'),
+    .describe('Text content — the one content spelling `text` reads (declared by objectui#6150; its `value` fallback spelling was retired by objectui#6951)'),
   // ADR-0049 RETIREMENT TOMBSTONE (objectui#6951 / objectui#7016, maintainer
   // ruling A1 of 2026-09-04). `value` was the second spelling of the one
   // content slot; the renderer now reads `content` alone, so a plain deletion
@@ -552,7 +552,7 @@ export const HtmlElementSchema = BaseSchema.extend({
   children: z.union([SchemaNodeSchema, z.array(SchemaNodeSchema)]).optional()
     .describe('Child components — read as `schema.children ?? schema.body`; ignored for the void tags `img` / `hr` / `br`'),
   href: z.string().optional()
-    .describe('`a` link target; scheme-sanitised at html-elements.tsx:74 (`javascript:` / `data:` / `vbscript:` are dropped)'),
+    .describe('`a` link target; scheme-sanitised (`javascript:` / `data:` / `vbscript:` are dropped)'),
   target: z.string().optional().describe('`a` browsing context — an internal link navigates through the SPA router unless this names another target'),
   rel: z.string().optional().describe('`a` link relationship'),
   title: z.string().optional().describe('Advisory title — declared for `a`, `img` and `abbr`'),