The scaffolded justfile now detaches the viewer (log in books-data/gui.log) and won't open a second one for the same books. AGENTS.md tells the agent to check gui-status at session start and follow open_at_start (ask/always/never) in wanderbooks.toml. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01DeBdcyb3YyRkcpicBZH5wh