/co:archive

Archive a completed change and merge its §S delta into the root SPEC.md.

Preconditions

• All §T rows in the change's CHANGE.md must be status x (done). If not, refuse and list the remaining tasks.
• The colony MCP server must be running.

Procedure

1. Verify completion: read openspec/changes/<slug>/CHANGE.md §T, confirm all rows are x.
2. Call spec_archive with:
   • repo_root, slug, session_id, agent
   • strategy: default three_way. Pass last_writer_wins only if the user explicitly accepted conflicts.
3. Handle the response:
   • status: archived — print archived_path, applied delta count, and any conflicts that were resolved.
   • status: refused — print the conflict list and tell the user to either resolve manually or re-run with --strategy last_writer_wins.