carve-harness: Skill for Claude Code

.claude/skills/checklist-loop/SKILL.md

checklist-loop is a skill for Claude Code from claude-code-expert/carve-harness. It costs 83 tokens per session (2,444 once invoked), scanned A, original, MIT.

A verification loop that compares implementation claims with the code, scores how closely the result matches the specification, and sends scores below 95 back for rework.

In plain words
What is it for?
Use it to manually run a specification check when the carve-verify-loop workflow is unavailable, such as in another agent or a general session.
Why use it?
It catches work that claims to meet a specification but does not fully match it.

Skill for Claude Code

Written for Claude Code: installed under .claude/. Also seen: reads .claude/ paths; mentions CLAUDE.md; mentions AGENTS.md.

This is claude-code-expert/carve-harness's own configuration. It tells Claude Code how to work on carve-harness itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything carve-harness configures →

Reuse

Borrowing it

Nothing to install: this file belongs to claude-code-expert/carve-harness. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/claude-code-expert/carve-harness/main/.claude/skills/checklist-loop/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/claude-code-expert/carve-harness

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for checklist-loop

README.md
[![agentmods](https://agentmods.dev/badge/skills/claude-code-expert/carve-harness/checklist-loop/github.svg)](https://agentmods.dev/skills/claude-code-expert/carve-harness/checklist-loop)
Your own site
<a href="https://agentmods.dev/skills/claude-code-expert/carve-harness/checklist-loop"><img src="https://agentmods.dev/badge/skills/claude-code-expert/carve-harness/checklist-loop/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for checklist-loop

Your own site · 80×15
<a href="https://agentmods.dev/skills/claude-code-expert/carve-harness/checklist-loop"><img src="https://agentmods.dev/badge/skills/claude-code-expert/carve-harness/checklist-loop.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 83 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,444 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 1 finding, up to high

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • high Tool Misuse · line 81
    Tool parameters are crafted to achieve unintended or unsafe behavior. Parameter abuse can bypass intended safety checks (e.g. shell=True, --force, dangerous glob patterns).
    Fix: Validate all tool parameters against an allowlist. Reject dangerous parameter values (shell=True, --force, -rf /) and use safe defaults.
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00083 $0.02444
Opus 5.5 $0.00033 $0.00978
Sonnet 5.5 $0.00017 $0.00489
Haiku 4.5 $0.00008 $0.00244

Measured 1mo ago against content hash af93f212f595, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

checklist-loop scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.claude/skills/checklist-loop/SKILL.md · 109 lines

How it starts

The opening of the file, as written. The whole thing — 109 lines — stays where its author put it; the contents beside it link to each section on GitHub.

checklist-loop — 스펙→개발→체크리스트→채점→재작업 루프 (모델 무관 SOP)

권위는 도구가 아니라 이 절차에 있다(fable-team-guide 4절). carve-verify-loop 워크플로는 이 절차를 코드로 자동 실행할 뿐이다. Fable/Opus/Sonnet 어떤 세션이든, 훅 없는 다른 에이전트든 아래를 그대로 수동 실행하면 동일하게 동작한다.

핵심 불변식

  • 생성자(builder)와 채점자(evaluator)는 절대 같은 에이전트가 아니다 (Self-Eval Blindspot 방지, AGENTS.md 6절).
  • 주장을 믿지 않는다. "구현했다"는 claim은 실제 코드 대조 + 테스트 실행으로만 인정한다.
  • 완료 = 모든 항목 score ≥ 임계(기본 95). 하나라도 미달이면 루프는 끝나지 않는다.
  • 에이전트 간 통신은 파일 기반 — specs/checklist.json이 단일 진실원.

specs/checklist.json 스키마 (정본)

{
  "goal": "주문 취소 API",
  "iteration": 2,
  "threshold": 95,
  "items": [
    {
      "id": "c1",
      "claim": "POST /orders/{id}/cancel 구현",
      "acceptance": "204 반환 + 상태 CANCELLED 전이 테스트 통과",
      "owns": ["src/api/cancel/**"],
      "attempts": 2,
      "score": 75,
      "axes": { "exists": 25, "match": 25, "test": 0, "contract": 15, "no_regress": 10 },
      "tests": { "ran": true, "passed": 3, "failed": 1, "command": "npm test -- cancel" },
      "pass": false,
      "gaps": ["멱등성 미검증", "이미 취소된 주문 409 테스트 없음"],
      "evidence": "src/api/cancel/route.ts:12; test 3/4 pass"
    }
  ]
}
  • claim/acceptance/owns: 분해 단계에서 채운다. owns glob은 항목끼리 겹치면 안 된다(파일 오너 1개).
  • type(선택): convention | correctness | domain_safety. domain_safety 항목은 100점이 아니면 총점·임계와 무관하게 Stop 게이트가 차단한다(GATE-C7, 블루프린트 §5.5 허용 실패율 0%). 도메인 불변식(CLAUDE.md 도메인 규칙)을 구현하는 항목에 붙여라. type 없는 항목은 임계(95) 규칙만.
  • axes/tests/score/pass/gaps/evidence/attempts: 채점 단계에서 채운다. score = 5축 합, pass = score >= threshold.
  • 5축 루브릭(합 100): exists25·match25·test25·contract15·no_regress10.
  • test 축은 채점자가 신고하지 않는다 — 실행 결과에서 파생한다. evaluator는 tests: {ran, passed, failed, command, output}을 보고하고, ran:true·passed>0·failed=0이면 test=25, 아니면 0이다(비율 부분점수 없음 — 4/5 통과가 20점이면 나머지 만점과 합쳐 정확히 95라 실패 테스트를 안고 통과한다). 미실행·실패 1건이면 나머지 네 축 만점이어도 합 75라 95를 넘을 수 없다(거짓 완료 차단). 숫자를 직접 받으면 이 불변식은 산문일 뿐이다.
  • 게이트가 축을 대조한다(GATE-C8). axes가 있으면 checklist-gate.sh가 score를 축에서 재계산해 불일치와 "test=0인데 임계 이상"을 차단하고, tests가 있으면 test 축을 실행 결과에서 다시 파생해 대조한다. axes 없는 항목은 기존대로 score만 본다(구형·타 에이전트 체크리스트 하위호환).

Read the full file on GitHub · 109 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 1mo ago Changed · +5 lines af93f212f595
  2. 1mo ago Changed · +1 lines 08fc1d87cd9f
  3. 1mo ago First seen · 103 lines · 83 tokens per session scan A b08c48a550d4

Subscribe to this mod's changes

checklist-loop is a skill published in the GitHub repository claude-code-expert/carve-harness (15 stars, last pushed 1mo ago), licensed MIT. It adds 83 tokens to every session and 2,444 once invoked, about $0.0003 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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