agent-workspace-compatibilitylisted

# Agent Workspace Compatibility 1. Inspect the canonical skills directory, provider package outputs, instruction aliases, and the build/check commands before making changes. 2. Keep one authored skill tree under `.agents/skills/`. Provider packages that disallow external symlinks must be generated as physical copies. 3. Make `AGENTS.md` the canonical always-on instruction file. Create only relative aliases for provider-specific filenames; never overwrite a real instruction file without explicit approval. 4. Make the build deterministic and add a check mode that detects generated output drift. Test clean setup, stale output, incorrect links, and repeated runs. 5. Use skills.sh for cross-agent installation and its copy mode where symlinks are unavailable. **Next steps:** After a migration or audit, use `drift-check` to verify the generated package, instructions, and documentation still agree.