Two wins from the dev-agent's implementation:
1. exec-briefing.sh: rewritten to just call exec-inject.sh with a
briefing prompt (57 lines, down from 154). No more duplicated
compass/character/context loading.
2. exec-inject.sh: response capture now uses agent_wait_for_claude_ready
+ pane line diff instead of custom EXEC-RESPONSE-START/END markers.
Claude just responds naturally — no special output format needed.
Also: matrix listener uses nohup for robustness and validates TOML
path before passing to exec-inject.sh.
c3acce7f8f