diff --git a/.changeset/5867-plaintext-fenced-ts-batch4.md b/.changeset/5867-plaintext-fenced-ts-batch4.md
new file mode 100644
index 0000000000..88d2a22e54
--- /dev/null
+++ b/.changeset/5867-plaintext-fenced-ts-batch4.md
@@ -0,0 +1,22 @@
+---
+---
+
+Docs only, publishes nothing: nineteen TypeScript snippets across
+`content/docs/blocks/block-schema.mdx` and six `content/docs/plugins/*.mdx`
+reference pages were fenced ```plaintext, so `check-doc-snippet-types` — which
+reads only `ts` / `tsx` fences — never saw them (objectui#5867, batch 4 of N).
+Triage's classifier is the one applied: a plaintext block whose first line
+starts with `import` / `export` / `interface` / `type X =` / `const x: T` is
+code, and those fences are now `ts`; genuinely prose blocks on the same pages
+are left alone. Compiling them found real documentation defects on
+`block-schema`, now fixed: the *Complete Example*, *Block Slots* and
+*Marketplace Example* blocks annotated `BlockSchema` / `SchemaNode` /
+`BlockLibrarySchema` without importing them, and three blocks referenced values
+defined in other blocks on the page. Resolving `BlockLibrarySchema` then
+un-masked a defect the unresolved name had been suppressing: both marketplace
+listings carried `schema: { /* block schema */ }`, an empty object that
+`BlockLibraryItem.schema` rejects because `BlockSchema` requires `type`. The
+gate's blocks-to-compile count rises from 206 to 225 — exactly the batch — with
+diagnostics at 0, no new `FRAGMENT_MARKER` declarations, and the
+covered/ungated sets unmoved. The blocks also stop rendering as unstyled
+plaintext and pick up TypeScript highlighting, which is the reader-visible half.
diff --git a/content/docs/blocks/block-schema.mdx b/content/docs/blocks/block-schema.mdx
index f8fbbef323..d0baf1fb95 100644
--- a/content/docs/blocks/block-schema.mdx
+++ b/content/docs/blocks/block-schema.mdx
@@ -62,7 +62,7 @@ expanded. None of them goes through `BlockSchema`: there is nothing that expands
 
 ## Basic Usage
 
-```plaintext
+```ts
 import type { BlockSchema } from '@object-ui/types';
 
 const heroBlock: BlockSchema = {
@@ -108,7 +108,7 @@ const heroBlock: BlockSchema = {
 
 ### Block Metadata
 
-```plaintext
+```ts
 interface BlockMetadata {
   name: string;              // Block identifier
   label?: string;            // Display name
@@ -129,7 +129,7 @@ interface BlockMetadata {
 
 Variables define configurable properties:
 
-```plaintext
+```ts
 interface BlockVariable {
   name: string;                    // Variable name
   label?: string;                  // Display label
@@ -146,7 +146,9 @@ interface BlockVariable {
 
 Slots define content injection points:
 
-```plaintext
+```ts
+import type { SchemaNode } from '@object-ui/types';
+
 interface BlockSlot {
   name: string;                    // Slot name
   label?: string;                  // Display label
@@ -186,7 +188,9 @@ this family it is **declared but not yet consumed** - no renderer reads it today
 
 ## Complete Example
 
-```plaintext
+```ts
+import type { BlockSchema } from '@object-ui/types';
+
 const cardBlock: BlockSchema = {
   type: 'block',
   
@@ -325,7 +329,7 @@ const cardBlock: BlockSchema = {
 variable values, what slot content. It is a definition, not a component - nothing
 resolves `blockId` or expands the block it names.
 
-```plaintext
+```ts
 import type { BlockInstanceSchema } from '@object-ui/types';
 
 const instance: BlockInstanceSchema = {
@@ -365,8 +369,11 @@ selected it and the listings it returned. It is a data shape, not a browser comp
 nothing renders a library, and `onInstall` / `onPreview` name handlers that no dispatcher
 looks up.
 
-```plaintext
-import type { BlockLibrarySchema } from '@object-ui/types';
+```ts
+import type { BlockLibrarySchema, BlockSchema } from '@object-ui/types';
+
+// The block defined under "Basic Usage" above.
+declare const heroBlock: BlockSchema;
 
 const library: BlockLibrarySchema = {
   type: 'block-library',
@@ -403,8 +410,11 @@ const library: BlockLibrarySchema = {
 open and which panels a host would show. It is a configuration shape, not an editor
 component - no block editor exists to consume it.
 
-```plaintext
-import type { BlockEditorSchema } from '@object-ui/types';
+```ts
+import type { BlockEditorSchema, BlockSchema } from '@object-ui/types';
+
+// The block defined under "Complete Example" above.
+declare const cardBlock: BlockSchema;
 
 const editor: BlockEditorSchema = {
   type: 'block-editor',
@@ -423,7 +433,9 @@ const editor: BlockEditorSchema = {
 
 ## Marketplace Example
 
-```plaintext
+```ts
+import type { BlockLibrarySchema } from '@object-ui/types';
+
 const marketplace: BlockLibrarySchema = {
   type: 'block-library',
   apiEndpoint: 'https://blocks.objectui.com/api',
@@ -444,7 +456,7 @@ const marketplace: BlockLibrarySchema = {
         premium: false,
         preview: 'https://blocks.objectui.com/previews/pricing-table.png'
       },
-      schema: { /* block schema */ },
+      schema: { type: 'block', meta: { name: 'pricing-table-pro' } },
       installs: 5420,
       rating: 4.9,
       ratingCount: 234,
@@ -463,7 +475,7 @@ const marketplace: BlockLibrarySchema = {
         version: '1.3.0',
         premium: true
       },
-      schema: { /* block schema */ },
+      schema: { type: 'block', meta: { name: 'testimonial-slider' } },
       installs: 2150,
       rating: 4.7,
       ratingCount: 89
@@ -474,9 +486,12 @@ const marketplace: BlockLibrarySchema = {
 
 ## Runtime Validation
 
-```plaintext
+```ts
 import { BlockSchema } from '@object-ui/types/zod';
 
+// The block configuration to validate.
+declare const myBlock: unknown;
+
 const result = BlockSchema.safeParse(myBlock);
 
 if (result.success) {
diff --git a/content/docs/plugins/plugin-charts.mdx b/content/docs/plugins/plugin-charts.mdx
index 1dc7481758..a7520403c9 100644
--- a/content/docs/plugins/plugin-charts.mdx
+++ b/content/docs/plugins/plugin-charts.mdx
@@ -262,7 +262,7 @@ const schema = {
 
 ## TypeScript Support
 
-```plaintext
+```ts
 import type { BarChartSchema } from '@object-ui/plugin-charts'
 
 const chartSchema: BarChartSchema = {
diff --git a/content/docs/plugins/plugin-editor.mdx b/content/docs/plugins/plugin-editor.mdx
index 93da2db490..e80bb05eea 100644
--- a/content/docs/plugins/plugin-editor.mdx
+++ b/content/docs/plugins/plugin-editor.mdx
@@ -137,7 +137,7 @@ This keeps your main application bundle small while providing full IDE-like edit
 
 ## TypeScript Support
 
-```plaintext
+```ts
 import type { CodeEditorSchema } from '@object-ui/plugin-editor'
 
 const editorSchema: CodeEditorSchema = {
diff --git a/content/docs/plugins/plugin-form.mdx b/content/docs/plugins/plugin-form.mdx
index 1307bb99c0..aeaad38e29 100644
--- a/content/docs/plugins/plugin-form.mdx
+++ b/content/docs/plugins/plugin-form.mdx
@@ -212,7 +212,7 @@ spec rejects `pane` on non-split form types at parse.)
 
 ### Registration is a side effect of the import
 
-```plaintext
+```ts
 import '@object-ui/plugin-form';
 ```
 
@@ -242,7 +242,7 @@ claims it.
 To serve one of this package's components under a key of your own, register the
 exported component — that is what a manual registration is here:
 
-```plaintext
+```ts
 import { ComponentRegistry } from '@object-ui/core';
 import { ObjectForm } from '@object-ui/plugin-form';
 
diff --git a/content/docs/plugins/plugin-grid.mdx b/content/docs/plugins/plugin-grid.mdx
index 72fa9d6402..96a0ed8fd4 100644
--- a/content/docs/plugins/plugin-grid.mdx
+++ b/content/docs/plugins/plugin-grid.mdx
@@ -170,7 +170,7 @@ view whose columns are all `none` (or carry no `summary`) has no footer.
 
 ### Registration is a side effect of the import
 
-```plaintext
+```ts
 import '@object-ui/plugin-grid';
 ```
 
@@ -200,7 +200,7 @@ the CSS Grid *layout* container in `@object-ui/components`
 To serve the data grid under a key of your own, register the exported renderer —
 that is what a manual registration is here:
 
-```plaintext
+```ts
 import { ComponentRegistry } from '@object-ui/core';
 import { ObjectGridRenderer } from '@object-ui/plugin-grid';
 
diff --git a/content/docs/plugins/plugin-markdown.mdx b/content/docs/plugins/plugin-markdown.mdx
index d6a0456e4b..d81a723636 100644
--- a/content/docs/plugins/plugin-markdown.mdx
+++ b/content/docs/plugins/plugin-markdown.mdx
@@ -347,7 +347,7 @@ The plugin uses lazy loading to optimize bundle size:
 
 ## TypeScript Support
 
-```plaintext
+```ts
 import type { MarkdownSchema } from '@object-ui/plugin-markdown'
 
 const markdownSchema: MarkdownSchema = {
diff --git a/content/docs/plugins/plugin-view.mdx b/content/docs/plugins/plugin-view.mdx
index a21996a93c..a0562fea6d 100644
--- a/content/docs/plugins/plugin-view.mdx
+++ b/content/docs/plugins/plugin-view.mdx
@@ -202,7 +202,7 @@ path only (the row above, and the section below), so on a non-grid
 
 ### Registration is a side effect of the import
 
-```plaintext
+```ts
 import '@object-ui/plugin-view';
 ```
 
@@ -238,7 +238,7 @@ than as a schema key.
 To serve one of this package's components under a key of your own, register the
 exported component — that is what a manual registration is here:
 
-```plaintext
+```ts
 import { ComponentRegistry } from '@object-ui/core';
 import { ViewSwitcher } from '@object-ui/plugin-view';