docs: correct claims left stale by today's apm-only commits

A five-agent review of today's seven commits found no executable
regressions and no dangling references, but a set of documents still
asserting, in present tense, machinery that ADR-0024 and its commits
removed. This corrects them in place, keeping the original text as the
historical record wherever the repo's amendment convention applies.

LESSONS.md: the 2026-06-21 entry prescribed a `claude plugin validate`
sweep that now fails on every plugin, so it is marked superseded with
the surviving gates named. The 2026-08-09 entry gained a recurrence
note: today's manifest deletion broke apm's MCP propagation exactly as
that lesson describes, and its prescribed repo-local grep could not
have caught it, because `plugin_parser.py` ships in the apm toolchain
installed outside this repository.

ADR-0019, ADR-0011 and ADR-0021: amendments extended to passages the
earlier correction passes stepped over -- a dead native-consumer guard,
Consequences bullets still calling for a `plugins/gitea/.mcp.json` that
must not be recreated, and a drift-gate list naming a deleted script.
ADR-0021's list is down to one gate, not two: `apm audit --ci` never
read `description` and was never a drift gate.

architecture.md and enrichments.md: the self-containment constraint is
restated on its live source, the agentskills.io APM package-mode spec,
rather than on Claude Code's plugin cache-install, which ADR-0024
consequence 6 pins as a superseded rationale. releasing.md's pointer to
the deleted sync script is rewritten as history.

tests/run-bats.sh and scripts/lib/batch-run.sh: comment-only. The
`.claude/skills/` exclusion comment claimed a duplication that is not
live yet; apm does not strip `tests/`, and the deployed tree is empty
of them only because the lockfile still resolves the six dependencies
to a pre-ADR-0024 commit carrying the flat mirror. The exclusion is
correct but forward-looking, and now says so.

SIMPLIFICATION-AUDIT.md: reconciled against what the commits actually
did. Two closed findings recorded conclusions that ADR-0024 reversed
hours later; findings 1, 3, 31 and 35 carried prescriptions voided the
same day; finding 28 is now recorded as having moved backwards, with
docs/adr/ measured at +336 lines over the day. The section 1 headline
table is re-measured at a6434e0 and labelled with its basis. The
ADR-0012 contradiction between finding 2b and section 8 is resolved in
2b's favour after reading the ADR: only finding 24 is governed by it.

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

LESSONS.md

@@ -36,6 +36,8 @@ A research sub-agent reported "Process goes in SKILL.md, context in reference fi
 
 ## 2026-06-21 — `claude plugin validate --strict` is absent from the standard test sweep
 
+**Correction (2026-09-14): the fix below no longer has anything to run against.** `718c79a` deleted every `plugins/*/.claude-plugin/plugin.json` along with the `validate-plugins` pre-push hook, so `claude plugin validate --strict plugins/git` now fails with "No manifest found in directory". ADR-0024 ends native plugin install deliberately. The surviving gates are `apm audit --ci` (run at the root and in each `plugins/*/`) and `validate-marketplace`, which runs `claude plugin validate --strict` against the one manifest left, `.claude-plugin/marketplace.json`. Kept for reference:
+
 `claude plugin validate --strict` was left out of the standard plugin audit sweep and only discovered when the user flagged the gap. It catches warnings (missing `version` fields, stray non-agent `.md` files) that will fail CI once strict mode is enforced. Fix: run it on every plugin path and marketplace manifest as a named audit step.
 
 ## 2026-06-21 — Source and deployed gitleaks configs can silently diverge
@@ -102,6 +104,8 @@ pre-commit resolves a later `--config` argument against the *consuming* repo's r
 
 Removing a `--config` argument from `.pre-commit-hooks.yaml` was the right fix, but `check-release-needed.sh` derived its release-relevant path list by parsing that same token — with it gone, the derivation silently shrank with no error. Fix: before removing a token from an artifact more than one script reads, grep for everything that *parses* it, and assert on expected list members.
 
+**Recurrence (2026-09-14):** `718c79a` deleted every `.claude-plugin/plugin.json`; apm's `plugin_parser.py` parses exactly that file to propagate a plugin's `.mcp.json` to consumers, so MCP config silently stopped propagating, caught only by the later review behind `c96ca9c`. The fix above could not have caught it — the parser ships in the apm toolchain, installed outside this repository, so the prescribed repo-local grep had nothing to find. Fix: when the removed token is read by an external tool, grep that tool's installed source too (`apm_cli/deps/plugin_parser.py` here), not just the repo.
+
 ## 2026-08-09 — A documented impossibility is a claim, not a constraint
 
 A wrapper script's last-resort character rewrite was justified as "the one case no YAML scalar can carry verbatim" — untested because it seemed obviously true. It was false: a literal block scalar carries the exact characters in question, silently underlinting 12 of 54 files. Fix: when a residual is accepted as "impossible," write the claim in falsifiable form and test that claim directly, not the workaround built on it.