tmux has-session -t does prefix matching by default, so "gt-deacon-boot" would match when checking for "gt-deacon". This caused gt start to think the Deacon was running when only a stale gt-deacon-boot session existed. Using "=" prefix forces exact matching in tmux. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>