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setup
Adopt and maintain the apache-steward framework in a project repo via the snapshot-based adoption mechanism. The only framework skill committed in an adopter's repo — every other skill is a symlink the adopt sub-action wires up. Sub-actions: `/magpie-setup` — first-time adoption (default; main-checkout only) `/magpie-setup upgrade` — refresh the gitignored snapshot per the committed lock (main-checkout only) `/magpie-setup worktree-init` — symlink a worktree's snapshot to the main's `/magpie-setup verify` — health check + drift detection `/magpie-setup override <skill>` — open or scaffold an agentic override in `.apache-magpie-overrides/` `/magpie-setup unadopt` — reverse the adoption (snapshot, locks, symlinks, hook, doc sections); preserves