refactor(skills): retrofit the corpus to the ADR-0020 context contract (#129)

Retrofits all 39 skills to ADR-0020's description/body context contract, then fixes what six rounds of independent review found in that retrofit — including four ways the hot gate itself failed open.

Closes #99, #107, #108, #110, #111, #114, #115, #120.

## The retrofit (waves 1-5)

| | Start | Now |
|---|---|---|
| Description FAILs (>400 chars) | 26 | **0** |
| Body FAILs (>900 words, body-only) | 9 | **0** |
| Dangling routing targets | 2 | **0** |
| `Kyberforge.CompositionNote` | 10 | **0** |
| Preload tax | 21,005 chars | **~10,500** |

Under the 12,000-char success criterion. Per-wave detail is on #99.

## The review fixes

**The gate failed open four ways, three of them found after the retrofit shipped.** An unrecognised follower token made a dangling target vanish. A skill directory with no `SKILL.md` resolved as a valid target, so a commit could be green locally and red in a fresh clone — three existing fixtures were relying on that, one of which made the install-leak A/B pass vacuously. Then the free-standing `/name` sweep turned out to be gated on the sentence carrying a boundary marker, so route notation in any other sentence was invisible — not an ERROR, not a SUGGESTION, not an INFO — which left the documented "`/name` always blocks" promise false from a second direction. All four fixed and pinned.

**Two checks were silently not running.** `validate-provenance.sh` checks 7-8 were dead across nine skills. Waking them exposed a deeper problem: they assume `Research doc:` names a source index, but 30 of 121 entries point at topic content documents, so every new check-7 INFO was a false positive and check 8 was saved from a false-FAIL flood only by an *unannounced* skip. Checks 7/8 are now scoped to source indexes and every skip announces itself (#121).

**The retrofit's own anti-goal, four times.** ADR-0020 warns that a blunt gate gets satisfied by deleting content rather than relocating it. `diagnose` and `skill-audit` relocated prose and then read it unconditionally; `prototype` and `vale-config` deleted rules outright that survived nowhere. All four addressed.

## Verification

- `bash tests/run-tests.sh --strict` — 24 suites, 0 skipped, 0 failed
- `bash tests/run-bats.sh` — 325 tests, 0 failures
- `pre-commit run --all-files` — 17/17
- `pre-commit run --hook-stage pre-push --all-files` — 16/16, with `apm marketplace check` and `apm pack --check-clean` run against the remote, not skipped
- `scripts/skill-size-check.sh` over all 39 skills — rc 0, 0 ERROR/FAIL, SUGGESTION-only
- Preload tax measured at **10,498 chars**, max description 390 — both inside budget
- Every new test proven non-vacuous by a deliberate mutation of the behaviour it covers

**Per-commit sync, stated accurately:** the ten commits from the latest review round each pass `check-plugin-content-sync` in isolation, verified by checking each out in a detached worktree with a clean between. The earlier gitea window (`dfacf05..bedbd1d`, nine commits) does **not** — its mirror was regenerated in one batch at `bbc7300`. An earlier revision of this description claimed the property held for every commit; it does not, and a bisect through that window lands on a red commit. **Squash-merge** to collapse it, or accept that this range is not bisectable.

## Version bump

Six plugins and the catalog take a **patch**, not a minor. The branch is **89 commits — 40 `fix` / 30 `refactor` / 12 `docs` / 5 `chore` / 2 `test` — zero `feat`, zero `!`, zero `BREAKING CHANGE`** — and adds no skill, agent, command or hook. (Two earlier revisions of this section cited a stale histogram, most recently 78 commits; the figures above are measured at HEAD.) Both rules this repo ships (`forge/references/version-bump.md`, landing in this PR, and `git-commits/references/conventional-commits-spec.md`) make that a patch, and the catalog set is unchanged at 7 entries.

Not settled by that: four published files were removed from the installed tree, three moved, and `caveman` gained `disable-model-invocation`, retiring its old triggers. Under a strict reading those are major-class and currently ship under `refactor:` with no marker. Whether the deployed skill surface is a public contract is written down nowhere — worth deciding, but it outlives this PR.

## Deliberately not in scope

#112 (cherry-pick ownership, now resolved in favour of `git-commits`), #113 (`rtk git` normalisation), #116 (research fan-out), #101 (audit-skill merge), #122 (non-spec skill-root files), #123 (no PRD producer) stay open. #117 is the one worth reading: the contract's remedy is to move prose into `references/`, which is exactly where neither the size gate nor Vale looks — and the blind spot is wider than #117 currently records, since there is no root `.vale.ini` at all, so every ADR, `CONTEXT.md` and `README.md` is unlinted too.

That blind spot let this branch carry two `level: error` `Kyberforge.SentenceOpenerThereIs` violations into `references/` files it created — `provider-adapter-author/references/provider-matrix.md:31` and `agent-audit/references/finding-criteria.md:95`. Both are reworded in `afadaae`, confirmed by routing each file through the audit's own `vale-wrap.sh` (1 error each before, 0 after). Five further occurrences sit in `references/` files already on `main`; those are the pre-existing corpus and stay with #117, which is the real fix.

Also unfixed and not this PR's: `apm install` appends a duplicate `SessionStart` entry to `.claude/settings.json`, so a fresh clone cannot get pre-push green without an edit AGENTS.md warns against. Reproduces identically on `main`.

Co-authored-by: Defame1297 <gitea@rkdr.net>
Reviewed-on: https://git.dev.rkdr.net/Defame1297/holocron/pulls/129
Co-authored-by: Claude Code AI - Gitea MCP <claude@noreply.git.dev.rkdr.net>
Co-committed-by: Claude Code AI - Gitea MCP <claude@noreply.git.dev.rkdr.net>

plugins/bin/.apm/skills/triage/AGENT-BRIEF.md

@@ -1,6 +1,6 @@
 # Writing Agent Briefs
 
-An agent brief is a structured comment posted on a GitHub issue when it moves to `ready-for-agent`. It is the authoritative specification that an AFK agent will work from. The original issue body and discussion are context — the agent brief is the contract.
+An agent brief is a structured comment posted on an issue in the issue tracker when it moves to `ready-for-agent`. It is the authoritative specification that an AFK agent will work from. The original issue body and discussion are context — the agent brief is the contract.
 
 ## Principles
 
@@ -27,7 +27,7 @@ Describe **what** the system should do, not **how** to implement it. The agent w
 
 The agent needs to know when it's done. Every agent brief must have concrete, testable acceptance criteria. Each criterion should be independently verifiable.
 
-- **Good:** "Running `gh issue list --label needs-triage` returns issues that have been through initial classification"
+- **Good:** "Querying the issue tracker for the `needs-triage` label returns issues that have been through initial classification"
 - **Bad:** "Triage should work correctly"
 
 ### Explicit scope boundaries

plugins/bin/.apm/skills/triage/README.md

@@ -0,0 +1,35 @@
+# triage
+
+Move issues on the project issue tracker through a small state machine of triage roles.
+
+## What it does
+
+Gives issue triage an explicit state model and a fixed set of moves. Every issue carries exactly one **category** role (`bug`, `enhancement`) and one **state** role (`needs-triage`, `needs-info`, `ready-for-agent`, `ready-for-human`, `wontfix`); conflicting state roles are flagged to the maintainer before anything else happens. Unlabeled issues normally enter at `needs-triage`; `needs-info` returns there once the reporter replies. The maintainer can override at any point, and unusual transitions are questioned rather than executed silently.
+
+A run does one of three things depending on what the maintainer asks for:
+
+- **Show what needs attention** — three buckets, oldest first: unlabeled, `needs-triage`, and `needs-info` with reporter activity since the last triage notes.
+- **Triage a specific issue** — gather context (including prior triage notes, so resolved questions are not re-asked, and `.out-of-scope/` records that resemble the issue), recommend a category and state with reasoning, attempt reproduction for bugs *before* any grilling, run a `grill-with-docs` session if the issue needs fleshing out, then apply the outcome.
+- **Quick state override** — "move #42 to ready-for-agent" is trusted and applied directly, skipping grilling, after confirming the exact changes.
+
+Two hard rules: every comment or issue the skill posts during triage must open with the AI-generated disclaimer, and the canonical role names above are *not* necessarily the label strings in the tracker — each is resolved against the tracker's live label set before it is applied, and a name with no counterpart there is reported to the maintainer as a gap rather than guessed at.
+
+## Composition
+
+`grill-with-docs` is invoked at step 4 when an issue needs fleshing out; whatever that session establishes is carried into the triage notes so the work is not lost. The reverse direction also exists: `diagnose` names this skill as the place to send a *reported* bug that needs filing rather than debugging.
+
+## Usage
+
+```text
+/triage
+```
+
+Then describe what you want in natural language — "show me anything that needs my attention", "let's look at #42", "move #42 to ready-for-agent", "what's ready for agents to pick up?".
+
+## Files
+
+| File | Purpose |
+|------|---------|
+| `SKILL.md` | The roles and state machine, the three invocation modes, the needs-info template, and how to resume a prior session |
+| `AGENT-BRIEF.md` | Skill-root document, cited when an issue moves to `ready-for-agent` (and reused for `ready-for-human`): how to write a brief that stays durable for weeks while the codebase moves under it — describe interfaces and behavioural contracts, not line numbers |
+| `OUT-OF-SCOPE.md` | Skill-root document, cited when an enhancement is closed `wontfix` and when checking for prior rejections: how the `.out-of-scope/` knowledge base is laid out and what it is for — institutional memory, and deduplication against re-litigated requests |

plugins/bin/.apm/skills/triage/SKILL.md

@@ -1,6 +1,9 @@
 ---
 name: triage
-description: Triage issues through a state machine driven by triage roles. Use when user wants to create an issue, triage issues, review incoming bugs or feature requests, prepare issues for an AFK agent, or manage issue workflow.
+description: >
+  Use when the user wants an issue created, triaged, or moved through the
+  tracker's triage states, or an issue prepared for an AFK agent. Not debugging
+  the bug itself -> `diagnose`. Not fleshing out a design -> `grill-with-docs`.
 ---
 
 # Triage
@@ -35,7 +38,7 @@ Five **state** roles:
 
 Every triaged issue should carry exactly one category role and one state role. If state roles conflict, flag it and ask the maintainer before doing anything else.
 
-These are canonical role names — the actual label strings used in the issue tracker may differ. The mapping should have been provided to you - run `/setup-matt-pocock-skills` if not.
+These are canonical role names — the actual label strings used in the issue tracker may differ. Resolve each canonical name against the tracker's live label set before applying it, using whichever tracker skill this install provides. If a name has no counterpart there, report the gap and ask the maintainer for the mapping — never substitute a guess.
 
 State transitions: an unlabeled issue normally goes to `needs-triage` first; from there it moves to `needs-info`, `ready-for-agent`, `ready-for-human`, or `wontfix`. `needs-info` returns to `needs-triage` once the reporter replies. The maintainer can override at any time — flag transitions that look unusual and ask before proceeding.