docs: correct the apm-only change after a five-agent review

A five-agent review of 718c79a and d2480b8 found no skill, agent or hook
regressions (39 skills before and after) and confirmed both hook removals
are genuinely moot -- verified against the tree, not taken on the commit's
word. It did find one functional regression (fixed separately) and this
documentation drift.

Counting errors, all from a git pathspec `*` crossing `/`:
  - 17 .bats files shipped to consumers is really 10; 17 counted tracked
    paths merely containing /tests/, one of them a template asset
  - "roughly 88s off every push" is ~92.4s; 88 omitted validate-plugins
  - "roughly 70% of each plugin remains live" holds only for kyberforge;
    the real spread is 44.3% (bin) to 70.6%, now a table
  - the pre-push enforcement row was half-corrected: 33 entries stood
    unstruck (now 27) and 14 -> 11 switched counting basis mid-sentence
  - the root .claude-plugin/plugin.json was described as "kept"; it has
    never been tracked

gates.md said "Ten hooks" above a nine-row table (11 was decremented for
one removal, not two), and "both need the claude CLI" for one remaining
validator. Its pretty-format-json exclude rationale claimed six
alternations expanding to sixteen files in a passage headed "Mind which
number you are quoting" -- four alternations, two live files; the two
dead ones are dropped from the pattern. check-useless-excludes could not
catch this: it only flags an exclude matching nothing at all.

ADR-0024 cited ADR-0006 for a patch-bump rule it does not contain and
which ADR-0015 explicitly retired; stated apm's marketplace probe order
backwards (.claude-plugin/ is the last candidate, not the first, so the
earlier .github/plugin/ deletion only demoted resolution); undercounted
apm's skill-deploying targets as seven when there are fifteen; and never
recorded that validate-plugins was removed. The symlink hedge is resolved:
apm_cli/security/gate.py's ignore_non_content() drops symlinks silently on
deploy while apm_modules/ materialization dereferences them, so content
survives that far and vanishes at install. Accepted with no replacement
guard, per decision -- kyberforge/docs/hooks.md previously asserted a
guard that had been deleted with its script.

Four plugin READMEs still advertised `claude plugin install`; ADRs 0001,
0006, 0013, 0014, 0015 and 0019 described deleted machinery in the present
tense, 0019 most consequentially as the live justification for the
SessionStart hook's .apm/ path. CONTEXT.md's "apm package" entry forbade
"plugin" while using it in its own body, and "Output profile" lost the
antecedent for "one catalogue serves both".

run-tests.sh gains the .claude/skills/ exclusion run-bats.sh already had.
Latent today -- no test-*.sh lives under any .apm/skills/*/tests/ -- but
apm now deploys those directories, so one would be discovered twice.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01YR2CjVumUbEGWcMikcoXBD

docs/adr/0015-apm-replaces-plugin-marketplace-authoring.md

@@ -180,4 +180,7 @@ correction) sorted what they document into three buckets:
   marketplace. The manifest-compilation deliverable this ADR describes was genuinely complete;
   runtime discoverability was not. Fixed in ADR-0017 (a second, compiled flat-directory content
   mirror at each plugin root, generated by `scripts/sync-plugin-content.sh`) — see that ADR for
-  the root cause and the fix.
+  the root cause and the fix. **Superseded 2026-09-14:** ADR-0024 deleted that mirror and its
+  generator along with native `claude plugin install` support. The discoverability gap this
+  paragraph describes is therefore no longer bridged — it is no longer a gap this repo has, because
+  apm is now the only supported install path and apm reads `.apm/` directly.