The self-improvement review fork refused every edit/patch/write_file/remove_file on a skill
without `created_by: "agent"`, so lessons about hand-written, URL-installed, foreground-created,
bundled, hub, external or pinned skills were dropped with only a WARNING line (77% of refused
review writes on the #134289 reporter's install). The prompts then steered the fork to a
different umbrella or a new near-duplicate skill.
Ownership now gates only delete/archive: the review may improve any skill it learns from (still
read-before-write, ledgered, and staged when skills.write_approval is on), while autonomous
archival stays limited to curator-managed, unpinned, non-bundled/hub/external skills. The review
prompts drop the protected-skill lists and say never to delete.
Fixes#134289
e3d2e57c9e