The shipped default (./data/stacks) guarantees the mismatch that hid stack data from the file browser, the editor and (before 0.40.0) from backups: compose resolves ./config against the container path, so the daemon creates the data directories at /opt/stacks/<stack>/... on the host regardless of where STACKS_HOST_DIR points. Same change for the agent, plus the reasoning in .env.example and the README config table. Images unchanged (0.40.1). Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>