**Plan**

1. **Fix the selector dead code in `MessagesLayout.js`**  
   - File: `devplacepy/static/js/MessagesLayout.js`  
   - In `handleIncoming()` (~line 336), change:
     ```js
     const oldBody = pending.querySelector(".rendered-content");
     ```
     to:
     ```js
     const oldBody = pending.querySelector("dp-content");
     ```
   - The block that follows (lines 337–343) creates a new `<dp-content>`, sets its `textContent` to `frame.content` (verify that line exists – if missing, add `content.textContent = frame.content;` before the `replaceWith` call), and replaces `oldBody` with the new element.
   - **Move the removal of the `pending` CSS class** out of the `if (oldBody ...)` block so it always executes regardless of whether the content was replaced. The exact line (currently ~343) should be placed after the `if` block ends, or duplicated outside. This ensures the `pending` class is always removed when an incoming message matches a pending one.

2. **Update stale documentation**  
   - File: `services/messaging/CLAUDE.md`, line 41  
   - Replace the reference to `.rendered-content data-render` with a description of the current `<dp-content>` component and the fix applied.

3. **No Python code changes** – existing unit tests and lint checks remain unaffected.

---

**Definition of done**  
- [ ] `pip install -e '.[dev]' -q && make test-unit` exits 0.  
- [ ] `pip install -q ruff && ruff check .` exits 0 (no Python lint errors – the JS changes do not affect Python).  
- [ ] Code review confirms:
  - Query selector changed from `.rendered-content` to `dp-content`.  
  - New `<dp-content>` element receives `textContent = frame.content` before replacement.  
  - The `pending` class is removed unconditionally after the content replacement block.  
- [ ] `CLAUDE.md` now accurately reflects the component and no longer mentions `.rendered-content`.  
- [ ] Manual verification (optional but recommended): in a running dev instance, force an AI-modified message (e.g., by editing `schedule_modification` output) and confirm the bubble content updates to the corrected text.