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feat(skill-listing): add SKL scanner for the skill-listing token budget

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Fase 4 Items 2+3 (CC 2.1.114→181 gap-review). New orchestrated scanner
`skill-listing-scanner.mjs` (prefix SKL) flags every active skill whose
description exceeds the verified 1,536-char listing cap (CC 2.1.105, changelog
L1502). Past the cap, Claude Code silently truncates the description the model
reads to route skill invocation — dropping the trigger phrases at the tail.
HOME-scoped over all user + plugin skills via enumerateSkills (COL is the model).

- CA-SKL-001 (medium): description > 1,536 chars. Remediation folds in Item
  2(b) — recommends disableBundledSkills + skillOverrides + trimming
  (designvalg A: no standalone GAP-check, which would fire for nearly everyone).
- Designvalg B: v1 ships the verified cap ONLY. The aggregate 2%-of-context
  listing budget is deferred — it needs a context-window assumption that would
  turn a verified fact into a guess (would carry a CALIBRATION_NOTE if added).
- Choice C: recognize the skillOverrides settings key (CC 2.1.129) in
  KNOWN_KEYS. Left OUT of TYPE_CHECKS — the value is a per-skill object
  (off/user-invocable-only/name-only), not a string; a 'string' check (as the
  plan sketched) would create a NEW false positive. Verify-first deviation.

Registration: scan-orchestrator (13th scanner), humanizer (SKL → 'Wasted
tokens' + static/_default translations), scoring SCANNER_AREA_MAP (→ Token
Efficiency; no 11th area), README badge 12→13, CLAUDE.md (finding-id +
test-count), docs/scanner-internals.md, gap-matrix + plan status notes.

Snapshots reseeded hermetically (SEED_SNAPSHOT/UPDATE_SNAPSHOT): SKL entry with
0 findings in empty HOME, scanners_ok 11→12, claudeMdEstimatedTokens bump from
the CLAUDE.md edits flowing through the cascade. Contamination grep clean.

Suite 868/868 (856 baseline + 11 SKL + 1 skillOverrides). RED→GREEN logged
per cycle.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Ter3E2JSi1Khgmuf2kady8
This commit is contained in:
Kjell Tore Guttormsen 2026-06-18 17:36:28 +02:00
commit 7bb254780a
22 changed files with 390 additions and 37 deletions
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2
scanners/scan-orchestrator.mjs
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@ -28,6 +28,7 @@ import { scan as scanTokenHotspots } from './token-hotspots.mjs';
import { scan as scanCachePrefix } from './cache-prefix-scanner.mjs';
import { scan as scanDisabledInSchema } from './disabled-in-schema-scanner.mjs';
import { scan as scanCollision } from './collision-scanner.mjs';
import { scan as scanSkillListing } from './skill-listing-scanner.mjs';
// Directory names that identify test fixture / example directories
const FIXTURE_DIR_NAMES = ['tests', 'examples', '__tests__', 'test-fixtures'];
@ -62,6 +63,7 @@ const SCANNERS = [
{ name: 'CPS', fn: scanCachePrefix, label: 'Cache-Prefix Stability' },
{ name: 'DIS', fn: scanDisabledInSchema, label: 'Disabled-In-Schema' },
{ name: 'COL', fn: scanCollision, label: 'Plugin Skill Collision' },
{ name: 'SKL', fn: scanSkillListing, label: 'Skill-Listing Budget' },
];
/**