feat(deacon): design and beads for Deacon health orchestrator

- Update gt-5af with full Deacon design (AI agent, not just Go daemon)
- Create 8 implementation tasks as children of gt-5af
- Add AGENTS.md for agent onboarding
- Fix crew restart timing (add debounce, delay for Claude init)
- Add SendKeysDelayedDebounced to tmux for better prompt injection

Deacon will monitor Mayor/Witnesses proactively and handle lifecycle
requests from Mayor/Witnesses/Crew reactively.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

internal/tmux/tmux.go

@@ -145,6 +145,18 @@ func (t *Tmux) SendKeysDelayed(session, keys string, delayMs int) error {
 	return t.SendKeys(session, keys)
 }
 
+// SendKeysDelayedDebounced sends keystrokes after a pre-delay, with a custom debounce before Enter.
+// Use this when sending input to a process that needs time to initialize AND the message
+// needs extra time between paste and Enter (e.g., Claude prompt injection).
+// preDelayMs: time to wait before sending text (for process readiness)
+// debounceMs: time to wait between text paste and Enter key (for paste completion)
+func (t *Tmux) SendKeysDelayedDebounced(session, keys string, preDelayMs, debounceMs int) error {
+	if preDelayMs > 0 {
+		time.Sleep(time.Duration(preDelayMs) * time.Millisecond)
+	}
+	return t.SendKeysDebounced(session, keys, debounceMs)
+}
+
 // GetPaneCommand returns the current command running in a pane.
 // Returns "bash", "zsh", "claude", "node", etc.
 func (t *Tmux) GetPaneCommand(session string) (string, error) {