The loop's dispatch is agent-agnostic already — `--agent` just sets the
@mention it posts, so any coding agent that responds to an issue @mention and
opens a PR works. Make that explicit instead of implying Codex-only:
- micro-loop guide: add a "Choosing an agent" section — Codex (default), Claude
Code (via anthropics/claude-code-action responding to @claude), any other
mention-driven agent, and an honest note that assignment-triggered agents
(e.g. Copilot's coding agent) aren't supported by the mention dispatch yet.
- Clarify the `--agent` help text and the CLI README bullet.
No behavior change — the mention model already covers Codex and Claude; this
documents it and scopes the one real gap (an "assign" adapter) honestly.
Claude-Session: https://claude.ai/code/session_01CmdEY7pYmV5zzwCjNJ4ykL
Co-authored-by: Claude <noreply@anthropic.com>