ci: validate docs mdx before publish

.github/codex/prompts/docs-agent.md

@@ -28,4 +28,6 @@ Required workflow:
 4. Run `pnpm check:docs` if dependencies are available.
 5. Leave the worktree clean if no docs need changes.
 
+If `pnpm docs:check-mdx` or `pnpm check:docs` reports MDX parse errors, fix only the syntax needed for the listed existing docs files. Preserve prose meaning, frontmatter, code fences, and links; do not broadly rewrite translated or source content while repairing parser failures.
+
 When uncertain, prefer no edit and explain the uncertainty in the final message.

.github/codex/prompts/docs-mdx-repair.md

@@ -0,0 +1,25 @@
+# OpenClaw Docs MDX Repair Agent
+
+You are repairing generated OpenClaw documentation after a fast MDX validation failure.
+
+Goal: fix only the MDX syntax errors reported by the checker.
+
+Hard limits:
+
+- Edit only existing Markdown/MDX files under the locale path named by `LOCALE`.
+- Do not edit source English docs unless `LOCALE=en`.
+- Do not edit code, workflows, package metadata, generated sync metadata, translation memory, or assets.
+- Do not add, delete, or rename files.
+- Preserve the meaning of translated prose.
+- Preserve frontmatter, `x-i18n.source_hash`, links, code fences, JSX component names, and existing page structure.
+- Avoid broad formatting or retranslation.
+
+Required workflow:
+
+1. Read `.openclaw-sync/mdx/${LOCALE}.json` when it exists.
+2. Inspect only the listed files and nearby lines.
+3. Fix the minimal syntax issue, such as broken JSX attribute quoting, mismatched component closing tags, raw `<` text, raw HTML comments, or accidental top-level `import`/`export` text.
+4. Run `node source/scripts/check-docs-mdx.mjs "docs/${LOCALE}" --json-out ".openclaw-sync/mdx/${LOCALE}.json"`.
+5. Leave no changes outside `docs/${LOCALE}`.
+
+When uncertain, prefer the smallest escaping fix: backticks for literal words, `&lt;` for literal `<`, double quotes around JSX attribute values, and balanced component tags.

.github/workflows/docs-sync-publish.yml

@@ -43,6 +43,12 @@ jobs:
             --source-repo "$GITHUB_REPOSITORY" \
             --source-sha "$GITHUB_SHA"
 
+      - name: Install docs MDX checker dependency
+        run: npm install --no-save --package-lock=false @mdx-js/mdx@3.1.1
+
+      - name: Check publish docs MDX
+        run: node "$GITHUB_WORKSPACE/publish/.openclaw-sync/check-docs-mdx.mjs" "$GITHUB_WORKSPACE/publish/docs"
+
       - name: Commit publish repo sync
         working-directory: publish
         run: |