fix(doctor): report a real harness directory as unmanaged, not as "outside"

Found on flamingo during the first Mac install. ~/.config/crush/skills held
real directories from a pre-plugin install, and doctor said:

  FAIL outside: ~/.config/crush/skills resolves to ~/.config/crush/skills,
  outside the active checkout ~/.local/share/skills/skills

Naming a directory as its own resolution target is true and useless. Worse, it
pointed at the wrong fix: "outside" means a link into a foreign checkout, which
you repair by re-pointing the link. A real directory is repaired by moving it
aside and re-running install.sh — install.sh already refuses to delete it,
correctly, since it did not create it and cannot know what is in there.

Now reported as its own class, with the skill count so it is obvious whether
the directory holds a stale copy of the library or something unique that
belongs in the repo:

  FAIL unmanaged: <dir> is a real directory, not a link into the checkout —
  it holds N unmanaged skill(s); move it aside and re-run install.sh

The distinction matters because content in that directory reaches exactly one
harness and cannot receive new skills — the failure mode is silent divergence,
which is the same family as everything else this tool exists to catch.

Bump-Type: patch

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01BeAp5LTscnz2W7Ubt4eJ6m

tests/doctor_test.sh

@@ -112,6 +112,19 @@ mkdir -p "$f/home/.claude/skills"
 ln -sfn "$f/ck/skills/alpha" "$f/home/.claude/skills/alpha"
 assert_fails "$f" 'legacy' 'leftover per-skill Claude symlinks are reported'
 
+# --- 7b. harness dir is a REAL directory, not a link into the checkout -------
+# Found on flamingo 2026-08-26: ~/.config/crush/skills held real directories
+# from a pre-plugin install. The old message read "resolves to
+# <path>, outside the active checkout" — naming the directory as its own
+# resolution target, which is true but useless. It must say the dir is not a
+# link at all, because the fix (move it aside, re-run install.sh) is different
+# from the fix for a link into a foreign checkout.
+f=$(new_fixture realdir)
+mkdir -p "$f/home/.agents" "$f/home/.config/crush/skills/alpha"
+ln -sfn "$f/ck/skills" "$f/home/.agents/skills"
+printf -- '---\nname: alpha\ndescription: a\n---\n' > "$f/home/.config/crush/skills/alpha/SKILL.md"
+assert_fails "$f" 'not a link' 'real directory is reported as unmanaged, not as "outside"'
+
 # --- 7. dangling link inside a harness dir (not the canonical link itself) --
 # Exercises the per-entry scan rather than the canonical-link check: this is
 # the shape the 243 dead links actually had.