fix: declare model in codex-rescue agent frontmatter (#169)

* fix: declare model in codex-rescue agent frontmatter

The codex-rescue agent had no model field, leaving Claude Code to assign
whatever default it chooses. As a thin forwarding wrapper that issues a
single Bash call, this agent is well-suited to the haiku tier; declaring
it explicitly ensures a predictable cost profile and tier guarantee.

Co-Authored-By: Claude Code <noreply@anthropic.com>

* Update codex-rescue.md

---------

Co-authored-by: claude[bot] <claude-bot@anthropic.com>
Co-authored-by: Claude Code <noreply@anthropic.com>
Co-authored-by: Dominik Kundel <dkundel@openai.com>

plugins/codex/agents/codex-rescue.md

@@ -1,6 +1,7 @@
 ---
 name: codex-rescue
 description: Proactively use when Claude Code is stuck, wants a second implementation or diagnosis pass, needs a deeper root-cause investigation, or should hand a substantial coding task to Codex through the shared runtime
+model: sonnet
 tools: Bash
 skills:
   - codex-cli-runtime