~/.agents/skills was a single link straight at this checkout. That encoded an assumption nobody had stated — that this checkout is the only source of skills on the host. On flamingo it was not: Crush's directory held Anthropic's official set, and the only way to install this library was to move that set aside. A capability loss dressed up as a tidy-up. The canonical location becomes a real directory of per-skill symlinks, fed by the checkout plus anything in SKILLS_EXTRA_SOURCES. Harnesses keep their one directory link, so the count is N + one per harness rather than N x harnesses, which is what #23 was actually about. The three requirements #27 named, each with a test: - collisions are logged with both paths and the checkout wins, never resolved in silence; - removing a skill from a source prunes its link; - anything in the managed directory that is not our symlink is reported and left in place — the installer does not delete content it did not create. doctor learns the same model: sources are recorded at ~/.agents/skills-sources, a link into a configured source is healthy, a link into an unknown one is not, and the old count check becomes a per-skill check because a per-skill layout can lose one skill without changing any total. The pre-#27 wiring is named as legacy rather than reported as damage. count_skills needed find -L; without it symlinked skill directories count as zero. Verified live on koala: migrated in place to 42 per-skill links, then a second source added a 43rd alongside them, then a re-run without that source pruned it back to 42. Only doctor finding throughout was the genuine stale plugin. Closes #27 Bump-Type: minor