ckb/.agents/skills/ckb-lint/SKILL.md

---
name: ckb-lint
description: Health-check the wiki/ — conformance, freshness, confidence decay, retention sweep, supersession detection, orphan detection, graph consistency, index/log consistency, and error-book entries — auto-fixing what it safely can and reporting the rest, then reminding the user to review and sync to origin. Also runs the same checks against each connector-backed libs/<name>/'s own generated index (see ckb-index-external), plus a source.yaml validity check, without ever touching a git-copy lib or a connector's source.yaml itself. Use when the user says "Lint", "health-check the wiki", "check the wiki", or asks for a periodic/scheduled wiki health check. This is the maintenance workflow from CLAUDE.md/AGENTS.md §6, distinct from `ckb-ingest` (which adds new content) and `ckb-sync-changes` (a pure git-level operation with no wiki synthesis at all).
---

# Lint skill

## Purpose

Health-check the local, mutable `wiki/` for structural rot: missing or
malformed frontmatter, stale pages, decayed confidence, orphaned or
archivable content, broken graph edges, and index/log drift. This is
maintenance, not growth — it never adds new knowledge the way `ckb-ingest`
does; it only checks and repairs the shape of what's already there.

Implemented as a skill (rather than living inline in
`CLAUDE.md`/`AGENTS.md`) so the full checklist only loads into context when
actually invoked — on demand, or on a schedule if the user has set one up.

This skill only ever writes within `wiki/` (including moves into
`wiki/archived/`) and, for any connector-backed `libs/<name>/` (one with a
`source.yaml` — see `CLAUDE.md`/`AGENTS.md` §1/§4), within that connector's
own agent-owned generated index (`index.md`/`entities/`/`graph/`/`log.md`).
It never touches `linked/`, a git-copy `libs/<name>/`, or a connector's
`source.yaml` itself — those stay immutable upstream sources of truth — and
it never touches this repo's own git remote; pushing the resulting changes
is a separate, explicit step (see the final step below).

## Trigger phrases

Use this skill when the user says:
- "Lint"
- "health-check the wiki" / "check the wiki"
- "run the periodic/scheduled wiki check"

Do **not** use this skill for "Ingest" / "Sync the wiki" (that's
`ckb-ingest` — turning raw material into new wiki pages) or for "sync
changes" / "sync with git" (that's `ckb-sync-changes` — reconciling this
repo's own commit history with `origin`, no wiki content involved).

## How to run this skill

Work through each check in order. A malformed page breaks every later
check's ability to reason about it, so conformance comes first.

Checks 1-9 below are written against `wiki/`, but the same checks also run
a second time against each connector-backed `libs/<name>/`'s own generated
index — scoped entirely to that one connector's `index.md`/`entities/`/
`graph/`/`log.md`. Findings and fixes there are logged in that connector's
own `log.md`, never in `wiki/log.md`. A git-copy `libs/<name>/` (no
`source.yaml`) and any `source.yaml` itself are never touched by any of
these checks.

### 1 — Conformance check

Verify every non-reserved `.md` file under `wiki/` (i.e. excluding
`index.md` and `log.md`) has parseable YAML frontmatter with a non-empty
`type` field. Flag violations first, and treat flagged pages as
unreliable input for the checks below rather than guessing at their
intended type/content.

### 2 — Freshness check

Scan every page whose `last_updated` exceeds its `freshness_window_days`.
Flag as stale; suggest the user confirm or update the content — don't
silently rewrite stale content yourself.

### 3 — Confidence decay

Reduce `confidence` on pages not reinforced by a new source since the last
check. Pages that fall below 0.3 confidence get flagged for re-review.

### 4 — Retention sweep

Move `retention: low` pages older than 2× their `freshness_window_days`
into `wiki/archived/`. Never delete — always move, and log the move (see
Rule B in `CLAUDE.md`/`AGENTS.md` §7) with a note explaining why.

### 5 — Supersession detection

When two pages appear to cover the same entity, check for contradictions.
If one is clearly newer/better corroborated, add `supersedes` /
`superseded_by` links between them. Preserve the older page rather than
deleting it, but mark it stale.

### 6 — Orphan detection

Find pages with no inbound links (`[[wikilinks]]` or
`[markdown](path.md)` references from elsewhere in the wiki). Either add
backlinks from relevant pages where an obvious connection exists, or move
the orphan to `wiki/archived/` with a log note if no natural backlink
exists.

### 7 — Graph consistency

Verify every edge in `wiki/graph/edges.json` points to an existing entity
page. Remove or fix broken edges; note what was removed rather than
silently dropping entries.

### 8 — Index/log consistency

Verify every subdirectory under `wiki/` that contains pages has an
`index.md` listing all of them, and that no single change is recorded in
both a subdirectory `log.md` and the root `wiki/log.md` (per the
Recursive Index & Log Convention). Fix missing index entries and
duplicate log entries directly.

### 9 — Error Book entry

Record any systemic issue found above (a repeated broken pattern, a
recurring format mismatch, the same kind of orphan appearing again) in
`wiki/error-book.md` with its root cause, the fix applied, and the derived
constraint that should prevent recurrence. A one-off, isolated issue
doesn't need an Error Book entry — this is for patterns, not incidents.

### 10 — External source config check

For each `libs/<name>/source.yaml`, verify it has a non-empty `connector`
and `location` — report only, this one file is never edited by any skill.
Also flag (report only) a `libs/<name>/` that ambiguously has both real
content files and a `source.yaml` — that's a configuration conflict for the
user to resolve, not something to guess at.

### Auto-fix vs. report

Auto-fix what can be done safely and mechanically: broken links, missing
backlinks, stale flags, missing index entries, duplicate log entries,
dangling graph edges. Report anything that needs a judgment call
(supersession decisions, low-confidence content, ambiguous orphans) rather
than guessing on the user's behalf.

### Final step — Remind to review and sync

This is always the last step, every time this skill makes any change at
all to `wiki/`. Close with a short reminder — do not sync or push
anything yourself here:

> "Lint complete — see `wiki/log.md` for what changed (auto-fixed: ...;
> flagged for your review: ...). Please review the changes, and once
> you're happy with them, say 'sync changes' to commit and push them to
> `origin`."

If any connector-backed `libs/<name>/` was also touched, mention it
separately (its own `log.md`, not `wiki/log.md`) rather than folding it
into the same sentence.

If the lint pass made no changes at all (clean bill of health, nothing to
fix or flag), skip this reminder — there's nothing to review or sync.

## Edge cases

- **Wiki is empty or near-empty** — report that there's little to lint
  yet; don't fabricate findings to look thorough.
- **A page's frontmatter is unparseable** (not just missing `type`, but
  invalid YAML) — flag it prominently in the conformance check and skip
  it in every later numbered check rather than letting a parse error
  crash or silently mis-handle downstream logic.
- **Retention sweep would archive a page that's clearly still in active
  use** (e.g. linked from a very recent `workload/` entry) — flag it for
  the user to confirm rather than auto-archiving; recency of use can
  override a stale `last_updated`/`retention` combination.
- **Supersession is ambiguous** (two pages disagree and neither is
  clearly newer/better corroborated) — report the conflict rather than
  guessing which one wins.
- **Repeated run with nothing changed since the last lint** — should
  produce essentially the same clean report each time; don't invent
  variation just to seem active.

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*Licensed under the Apache License, Version 2.0 — see [LICENSE](../../../LICENSE)
at the repository root, or <http://www.apache.org/licenses/LICENSE-2.0>.*