ClaudeandClaude Fable 5
e518c669e4
- Dockerfile: COPY files_mcp package, mkdir -p /app/data/files at build time, set ENV FILES_MCP_ROOT=/app/data/files as the default sandbox root (overridable at runtime). - docker-compose.yml: surface FILES_MCP_ROOT in the env block with the same default, so operators can override it via .env or -e. FILES_MCP_ROOT must exist at process start (path_guard._init_root checks is_dir()), so the directory is created during build rather than deferred to entrypoint — fail-fast at image build beats a runtime RuntimeError on every container start. Default lives under /app/data so it rides the existing data volume (./data:/app/data) and persists across container restarts alongside connections.json / pending_jobs.json / logs/. Verified locally: docker compose config --quiet passes; FILES_MCP_ROOT resolves to /app/data/files in the rendered config. Full image build not run (docker daemon unavailable in this environment); please run `docker compose up -d --build` to confirm in your environment. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>