fix: restore agent override support lost in manager refactors

The manager refactors (ea8bef2, 72544cc0) conflicted with the agent
override feature, causing regressions:

Deacon (ea8bef2):
- Lost agentOverride parameter
- Re-added respawn loop (removed in 5f2e16f)
- Lost GUPP (startup + propulsion nudges)

Crew (72544cc0):
- Lost agentOverride wiring to StartOptions
- --agent flag had no effect on crew refresh/restart

This fix restores agent override support and GUPP while keeping
improvements from the manager refactors (zombie detection, etc).

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

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

internal/cmd/crew_lifecycle.go

@@ -236,9 +236,10 @@ func runCrewRefresh(cmd *cobra.Command, args []string) error {
 
 	// Use manager's Start() with refresh options
 	err = crewMgr.Start(name, crew.StartOptions{
-		KillExisting: true,      // Kill old session if running
-		Topic:        "refresh", // Startup nudge topic
-		Interactive:  true,      // No --dangerously-skip-permissions
+		KillExisting:  true,             // Kill old session if running
+		Topic:         "refresh",        // Startup nudge topic
+		Interactive:   true,             // No --dangerously-skip-permissions
+		AgentOverride: crewAgentOverride,
 	})
 	if err != nil {
 		return fmt.Errorf("starting crew session: %w", err)
@@ -346,8 +347,9 @@ func runCrewRestart(cmd *cobra.Command, args []string) error {
 		// Use manager's Start() with restart options
 		// Start() will create workspace if needed (idempotent)
 		err = crewMgr.Start(name, crew.StartOptions{
-			KillExisting: true,     // Kill old session if running
-			Topic:        "restart", // Startup nudge topic
+			KillExisting:  true,             // Kill old session if running
+			Topic:         "restart",        // Startup nudge topic
+			AgentOverride: crewAgentOverride,
 		})
 		if err != nil {
 			fmt.Printf("Error restarting %s: %v\n", arg, err)
@@ -425,8 +427,9 @@ func runCrewRestartAll() error {
 
 		// Use manager's Start() with restart options
 		err = crewMgr.Start(agent.AgentName, crew.StartOptions{
-			KillExisting: true,     // Kill old session if running
-			Topic:        "restart", // Startup nudge topic
+			KillExisting:  true,             // Kill old session if running
+			Topic:         "restart",        // Startup nudge topic
+			AgentOverride: crewAgentOverride,
 		})
 		if err != nil {
 			failed++

internal/cmd/start.go

@@ -203,7 +203,7 @@ func startCoreAgents(townRoot string, agentOverride string) error {
 
 	// Start Deacon (health monitor)
 	deaconMgr := deacon.NewManager(townRoot)
-	if err := deaconMgr.Start(); err != nil {
+	if err := deaconMgr.Start(agentOverride); err != nil {
 		if err == deacon.ErrAlreadyRunning {
 			fmt.Printf("  %s Deacon already running\n", style.Dim.Render("○"))
 		} else {
@@ -694,6 +694,7 @@ func runStartCrew(cmd *cobra.Command, args []string) error {
 	err = crewMgr.Start(name, crew.StartOptions{
 		Account:         startCrewAccount,
 		ClaudeConfigDir: claudeConfigDir,
+		AgentOverride:   startCrewAgentOverride,
 	})
 	if err != nil {
 		if errors.Is(err, crew.ErrSessionRunning) {

internal/cmd/up.go

@@ -83,7 +83,7 @@ func runUp(cmd *cobra.Command, args []string) error {
 
 	// 2. Deacon (Claude agent)
 	deaconMgr := deacon.NewManager(townRoot)
-	if err := deaconMgr.Start(); err != nil {
+	if err := deaconMgr.Start(""); err != nil {
 		if err == deacon.ErrAlreadyRunning {
 			printStatus("Deacon", true, deaconMgr.SessionName())
 		} else {

internal/crew/manager.go

@@ -50,6 +50,9 @@ type StartOptions struct {
 
 	// Interactive removes --dangerously-skip-permissions for interactive/refresh mode.
 	Interactive bool
+
+	// AgentOverride specifies an alternate agent alias (e.g., for testing).
+	AgentOverride string
 }
 
 // validateCrewName checks that a crew name is safe and valid.
@@ -514,7 +517,11 @@ func (m *Manager) Start(name string, opts StartOptions) error {
 
 	// Start claude with environment exports and beacon as initial prompt
 	// SessionStart hook handles context loading (gt prime --hook)
-	claudeCmd := config.BuildCrewStartupCommand(m.rig.Name, name, m.rig.Path, beacon)
+	claudeCmd, err := config.BuildCrewStartupCommandWithAgentOverride(m.rig.Name, name, m.rig.Path, beacon, opts.AgentOverride)
+	if err != nil {
+		_ = t.KillSession(sessionID)
+		return fmt.Errorf("building startup command: %w", err)
+	}
 
 	// For interactive/refresh mode, remove --dangerously-skip-permissions
 	if opts.Interactive {

internal/deacon/manager.go

@@ -49,8 +49,9 @@ func (m *Manager) deaconDir() string {
 }
 
 // Start starts the deacon session.
-// The deacon runs in a respawn loop for automatic recovery.
-func (m *Manager) Start() error {
+// agentOverride allows specifying an alternate agent alias (e.g., for testing).
+// Restarts are handled by daemon via ensureDeaconRunning on each heartbeat.
+func (m *Manager) Start(agentOverride string) error {
 	t := tmux.NewTmux()
 	sessionID := m.SessionName()
 
@@ -91,26 +92,25 @@ func (m *Manager) Start() error {
 	theme := tmux.DeaconTheme()
 	_ = t.ConfigureGasTownSession(sessionID, theme, "", "Deacon", "health-check")
 
-	// Launch Claude in a respawn loop for automatic recovery
-	// The respawn loop ensures the deacon restarts if Claude crashes
-	runtimeCmd := config.GetRuntimeCommand("")
-	respawnCmd := fmt.Sprintf(
-		`export GT_ROLE=deacon BD_ACTOR=deacon GIT_AUTHOR_NAME=deacon && while true; do echo "⛪ Starting Deacon session..."; %s; echo ""; echo "Deacon exited. Restarting in 2s... (Ctrl-C to stop)"; sleep 2; done`,
-		runtimeCmd,
-	)
+	// Launch Claude directly (no shell respawn loop)
+	// Restarts are handled by daemon via ensureDeaconRunning on each heartbeat
+	startupCmd, err := config.BuildAgentStartupCommandWithAgentOverride("deacon", "deacon", "", "", agentOverride)
+	if err != nil {
+		_ = t.KillSession(sessionID)
+		return fmt.Errorf("building startup command: %w", err)
+	}
 
 	// Wait for shell to be ready before sending keys (prevents "can't find pane" under load)
 	if err := t.WaitForShellReady(sessionID, 5*time.Second); err != nil {
 		_ = t.KillSession(sessionID)
 		return fmt.Errorf("waiting for shell: %w", err)
 	}
-	if err := t.SendKeysDelayed(sessionID, respawnCmd, 200); err != nil {
+	if err := t.SendKeysDelayed(sessionID, startupCmd, 200); err != nil {
 		_ = t.KillSession(sessionID) // best-effort cleanup
 		return fmt.Errorf("starting Claude agent: %w", err)
 	}
 
 	// Wait for Claude to start (non-fatal)
-	// Note: Deacon respawn loop makes this tricky - Claude restarts multiple times
 	if err := t.WaitForCommand(sessionID, constants.SupportedShells, constants.ClaudeStartTimeout); err != nil {
 		// Non-fatal - try to continue anyway
 	}
@@ -120,8 +120,18 @@ func (m *Manager) Start() error {
 
 	time.Sleep(constants.ShutdownNotifyDelay)
 
-	// Note: Deacon doesn't get startup nudge due to respawn loop complexity
-	// The deacon uses its own patrol pattern defined in its CLAUDE.md/prime
+	// Inject startup nudge for predecessor discovery via /resume
+	_ = session.StartupNudge(t, sessionID, session.StartupNudgeConfig{
+		Recipient: "deacon",
+		Sender:    "daemon",
+		Topic:     "patrol",
+	}) // Non-fatal
+
+	// GUPP: Gas Town Universal Propulsion Principle
+	// Send the propulsion nudge to trigger autonomous patrol execution.
+	// Wait for beacon to be fully processed (needs to be separate prompt)
+	time.Sleep(2 * time.Second)
+	_ = t.NudgeSession(sessionID, session.PropulsionNudgeForRole("deacon", deaconDir)) // Non-fatal
 
 	return nil
 }