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feat(skill-listing): add CA-SKL-002 aggregate listing-budget check

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Syklus 2 of Fase 4 Items 2+3. Flags when the sum of active skill
descriptions exceeds the listing budget (~2% of context, CC 2.1.32).

Design (operator-confirmed "fact-first, 200k anchor"):
- low severity (estimate) vs medium for the verified 1,536-char cap
- each description counted up to the 1,536 cap (what actually loads in
  the listing) — avoids double-counting the tail CA-SKL-001 flags
- fires when sum > 2% x 200k = 4000 tok; evidence leads with the measured
  sum + a calibration note that the budget scales 5x on 1M-context models
- aggregate emitted after the per-skill loop so the common case reads
  001=cap, 002=aggregate (finding IDs are a sequential counter, not stable
  semantic IDs — tests match on title, never NNN)

Also:
- tailored humanizer static entry for the aggregate title
- fix latent HOME leak in posture-grade-stability.test.mjs: it spawned
  posture.mjs without hermeticEnv(), so a real ~/.claude leaked HOME-scoped
  SKL/COL findings into the baseline grade (Token Efficiency A->B). Now
  isolated like the 8 other CLI-spawning tests.
- docs sync: test count 868->875, scanner-internals, gap-matrix, plan status

Suite 875/875, no snapshot drift, self-audit clean.

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 18:06:17 +02:00
commit 66433fee48
8 changed files with 215 additions and 11 deletions
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2
docs/cc-2.1.x-gap-matrix.md
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@ -97,7 +97,7 @@ Netto-nytt scanner-arbeid (DIS param-bevissthet, PLH shadow-folder-check, permis
| settings.json | env MAX_THINKING_TOKENS=0 disables thinking | 2.1.166 | missing | update-knowledge | knowledge/claude-code-capabilities.md | L | S |
| settings.json | parentSettingsBehavior / policyHelper (UNVERIFIED) | 2.1.133 | missing | new-feature-gap-check | scanners/settings-validator.mjs | L | S |
| settings.json | skillOverrides | 2.1.129 | DONE | added to KNOWN_KEYS (NOT TYPE_CHECKS — value is per-skill object off/user-invocable-only/name-only) | scanners/settings-validator.mjs | L | S |
| settings.json | ~~skillListingBudgetFraction / maxSkillDescriptionChars~~ (keys DO NOT EXIST — verified) | 2.1.105 | DONE | budget=2% ctx + cap=1536 are internal CC mechanisms, not settings keys; the verified 1,536-char cap is enforced by the new SKL scanner (CA-SKL-001) | scanners/skill-listing-scanner.mjs | L | M |
| settings.json | ~~skillListingBudgetFraction / maxSkillDescriptionChars~~ (keys DO NOT EXIST — verified) | 2.1.105 + 2.1.32 | DONE | budget=2% ctx + cap=1536 are internal CC mechanisms, not settings keys; both enforced by the SKL scanner — `CA-SKL-001` (1,536-char cap) + `CA-SKL-002` (aggregate 2%-of-context budget, 200k-anchored estimate) | scanners/skill-listing-scanner.mjs | L | M |
| CLAUDE.md / memory | 'too long' threshold now scales with context window | 2.1.169 | now-wrong | fix-false-positive | scanners/claude-md-linter.mjs | H | M |
| CLAUDE.md / memory | --safe-mode / CLAUDE_CODE_SAFE_MODE disables customizations | 2.1.169 | missing | update-knowledge | knowledge/configuration-best-practices.md | L | S |
| CLAUDE.md / memory | plugins in .claude/skills auto-load (cascade/token accounting) | 2.1.157 | partial | new-feature-gap-check | knowledge/configuration-best-practices.md | M | M |