fix: gt crew at restarts Claude if it has exited

- Check pane_current_command to detect if Claude is still running
- If shell is detected (bash, zsh, etc.), Claude exited - restart it
- Re-prime after restart with gt prime

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

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

internal/cmd/crew.go

@@ -463,12 +463,37 @@ func runCrewAt(cmd *cobra.Command, args []string) error {
 
 		fmt.Printf("%s Created session for %s/%s\n",
 			style.Bold.Render("✓"), r.Name, name)
+	} else {
+		// Session exists - check if Claude is still running
+		paneCmd, err := t.GetPaneCommand(sessionID)
+		if err == nil && isShellCommand(paneCmd) {
+			// Claude has exited, restart it
+			fmt.Printf("Claude exited, restarting...\n")
+			if err := t.SendKeys(sessionID, "claude --dangerously-skip-permissions"); err != nil {
+				return fmt.Errorf("restarting claude: %w", err)
+			}
+			// Prime after restart
+			if err := t.SendKeysDelayed(sessionID, "gt prime", 2000); err != nil {
+				fmt.Printf("Warning: Could not send prime command: %v\n", err)
+			}
+		}
 	}
 
 	// Attach to session using exec to properly forward TTY
 	return attachToTmuxSession(sessionID)
 }
 
+// isShellCommand checks if the command is a shell (meaning Claude has exited).
+func isShellCommand(cmd string) bool {
+	shells := []string{"bash", "zsh", "sh", "fish", "tcsh", "ksh"}
+	for _, shell := range shells {
+		if cmd == shell {
+			return true
+		}
+	}
+	return false
+}
+
 // attachToTmuxSession attaches to a tmux session with proper TTY forwarding.
 func attachToTmuxSession(sessionID string) error {
 	tmuxPath, err := exec.LookPath("tmux")