gates: AGENTS.md § Gates and mcp-read-server name every intake channel behind the Upload Review Gate, not only submit (#213 close); 10.0.0-beta.12

Files changed:
- AGENTS.md
- CHANGES.md
- VERSION
- docs/reference/configuration.md
- instructions/mcp-read-server.md
- tools/chemenu/commands/doctor.py

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SnAJ7Z3CpVD3PRbN73QtU2

AGENTS.md

@@ -329,9 +329,11 @@ one an agent can talk itself past. This section is the one list of them.
   touch a file this session is also changing, printing the incoming commits, the overlapping
   files, their diff and the `--confirm-rebase <token>` line that rebases once the user has
   judged that the two changes do not collide logically.
-- **Upload Review Gate.** `upload accept` exits **42** on an MCP `submit` tool submission
-  nobody has cleared yet, printing its manifest and the `--confirm <token>` line that promotes
-  it once the user approves - same shape as the Mass-Update Gate, one submission at a time.
+- **Upload Review Gate.** `upload accept` exits **42** on a submission in the quarantine
+  nobody has cleared yet - whichever intake channel delivered it: the MCP `submit` tool, a
+  synced folder or a command - printing its manifest and the `--confirm <token>` line that
+  promotes it once the user approves - same shape as the Mass-Update Gate, one submission at a
+  time.
 - **Guideline Push Gate.** `export guidelines --push` exits **42** before writing the generated
   `GUIDELINES.md` into any captured repository, printing every target's status, the diff for
   each one it would write, and the `--confirm <token>` line that pushes exactly that set once the