The mirror's `tests/` exclusion was depth-agnostic, so it deleted
`skill-author/assets/templates/tests/` — a template the skill scaffolds FROM —
alongside the depth-2 dev fixtures it was meant to drop. Since ADR-0017 makes the
mirror the installed content, the shipped scaffolder was broken: the mirror copy of
`new-skill.sh` exited 2 on `sed: can't read .../tests/README.md`, leaving a
half-written skill, while the byte-identical `.apm/` copy exited 0. `--check` was
green about it.
Check mode was restructured rather than patched because `diff -x` matches a basename
at any depth and cannot express the depth-2 scoping the fix needs — the two modes
could not be made to agree by construction. Check mode now runs the real `sync_dir`
into a throwaway root and diffs with no exclusions, leaving the exclusion rule and
the hooks destination each in exactly one place.
Also fixed here, all previously invisible to `--check`:
- Merged hooks were written to `<plugin>/hooks.json`, which Claude Code does not
convention-scan, while ADR-0017 itself quoted `hooks/hooks.json` as the contract.
Moved, with the legacy path cleaned up as stale. No `hooks` pointer is added to
`plugin.json`, so this does not reopen the option ADR-0017 rejected.
- Only the first drift per plugin was reported: `diff | sed` returns 1 under
`pipefail`, and `set -e` killed the subshell before the remaining checks and
before `FAIL=1`.
- File-mode and symlink drift were invisible, so `--check` and a real sync
disagreed; a find-based type/mode manifest now covers both.
The tests pinned almost none of this — the stale-skill wipe, the check-mode stale
branch, three `MIRROR_DIRS` entries and the hooks newline normalization could each
be deleted with the suite still green. All are now mutation-tested.
Refs: #90
ADR: 0017
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01X7GvKuJfy2WrdBmUttV4DT
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