verification-engine

verification-engine is a skill for Claude Code from sangrokjung/claude-forge. It costs 52 tokens per session (2,366 once invoked), scanned A, original, MIT.

A verification workflow for checking code before a commit, pull request, or completion claim. It runs builds, tests, and lint checks in a fresh agent context and can repair failures before checking again.

In plain words
What is it for?
Use it to validate builds, tests, linting, security checks, coverage, and handoffs before merging or declaring implementation complete.
Why use it?
It catches problems that may be missed by the agent that wrote the changes. A fresh context helps reduce bias when validating the result.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: mentions CLAUDE.md; mentions subagents.

Part of the claude-forge plugin — 33 skills, 39 commands, 17 agents shipped together

Good fit Use it to validate builds, tests, linting, security checks, coverage, and handoffs…

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/sangrokjung/claude-forge/verification-engine
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add sangrokjung/claude-forge --skill verification-engine
Clone the repo
git clone --depth 1 https://github.com/sangrokjung/claude-forge

Made for: Claude Code.

Or install claude-forge, the plugin that ships this one along with the rest of its 33 skills, 39 commands, 17 agents.

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 verification-engine

README.md
[![agentmods](https://agentmods.dev/badge/skills/sangrokjung/claude-forge/verification-engine.svg)](https://agentmods.dev/skills/sangrokjung/claude-forge/verification-engine)
Your own site
<a href="https://agentmods.dev/skills/sangrokjung/claude-forge/verification-engine"><img src="https://agentmods.dev/badge/skills/sangrokjung/claude-forge/verification-engine.svg" alt="Measured on agentmods" height="20"></a>
Per session 52 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,366 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.
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 $0.00052 $0.02366
Opus 5 $0.00026 $0.01183
Sonnet 5 $0.00010 $0.00473
Haiku 4.5 $0.00005 $0.00237

Measured 3d ago against content hash 26321e6f5e2f, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

verification-engine 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 3d 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.

skills/verification-engine/SKILL.md · 260 lines

How it starts

The opening of the file, as written. The whole thing — 260 lines — stays where its author put it; the contents beside it link to each section on GitHub.

검증 원칙

Iron Law, Gate Function, Common Failures 체크리스트는 rules/verification.md에 정의되어 있다. 이 스킬은 해당 원칙의 실행 엔진이다.


Overview

통합 검증 엔진 스킬은 /handoff-verify 커맨드의 핵심 동작을 정의한다. v5의 /verify 단독 커맨드에서 v6의 /handoff-verify 통합 커맨드로 진화하였다.

핵심 변경: Task 도구로 verify-agent 서브에이전트를 생성하여 fresh context에서 검증. /clear 없이도 편향 없는 검증이 가능하다.


Trigger Conditions

직접 호출

트리거 설명
/handoff-verify 핸드오프 + 기본 루프 검증 (최대 5회)
/handoff-verify --once 핸드오프 + 단발 검증
/handoff-verify --loop 3 핸드오프 + 3회 루프
/handoff-verify --security 핸드오프 + 보안 검증 포함
/handoff-verify --coverage 핸드오프 + 테스트 커버리지 분석
/handoff-verify --extract 핸드오프 + 에러 추출/분류 모드
/handoff-verify --skip-handoff 핸드오프 생략 + 검증만

자동 호출

상황 동작
/commit-push-pr 실행 전 --once 모드로 사전 검증
/orchestrate 검증 단계 루프 모드로 자동 실행

Architecture (v6)

/handoff-verify 커맨드 (부모 컨텍스트)
   │
   ├── [1] handoff.md 자동 생성
   │     └── git diff 분석, 변경 의도 문서화
   │
   ├── [2] verify-agent 서브에이전트 생성 (Task 도구)
   │     └── Fresh context! (/clear 대체)
   │         │
   │         ├── handoff.md 읽기
   │         ├── 검증 파이프라인 실행
   │         ├── 실패 시 자동 수정 + 재시도
   │         └── 결과 반환
   │
   └── [3] 결과 수신 및 처리
         ├── PASS → handoff.md 정리, 다음 단계 안내
         └── FAIL → 에러 보고, 권장 조치 안내

v5 대비 아키텍처 변경

v5 v6
/handoff → /clear → /verify /handoff-verify (단일 커맨드)
부모 컨텍스트에서 직접 검증 서브에이전트가 fresh context에서 검증
/clear로 컨텍스트 손실 부모 컨텍스트 보존
수동 3단계 워크플로우 자동 1단계 워크플로우

Verification Pipeline

단계별 실행 순서 (verify-agent 내부)

[1단계] 환경 파악
   ├── handoff.md 읽기 (변경 의도)
   ├── git status / diff
   ├── 프로젝트 타입 감지
   └── 패키지 매니저 감지
         │
[2단계] 빌드 검증
   ├── npm run build / go build / cargo build
   └── 빌드 실패 시 → Fixable 자동 수정
         │
[3단계] 타입 검사
   ├── tsc --noEmit / mypy / go vet
   └── 타입 오류 → Fixable 자동 수정
         │
[4단계] 린트 검사
   ├── eslint / golangci-lint / clippy
   └── 린트 오류 → Fixable 자동 수정
         │
[5단계] 테스트 실행
   ├── npm test / go test / cargo test
   └── 실패 시 → 에러 분석 + 수정 시도
         │
[6단계] 코드 리뷰 (effort에 따라)
   ├── low: 건너뜀
   ├── medium: 변경 파일만
   ├── high: 변경 파일 + 의존성
   └── max: 전체 영향 분석
         │
[7단계] 보안 검토 (--security 또는 effort:max)
   └── security-reviewer 서브에이전트 연동

Read the full file on GitHub · 260 lines

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. 3d ago First seen · 260 lines · 52 tokens per session scan A 26321e6f5e2f

Subscribe to this mod's changes

verification-engine is a skill published in the GitHub repository sangrokjung/claude-forge (824 stars, last pushed 3d ago), licensed MIT. It adds 52 tokens to every session and 2,366 once invoked, about $0.0003 per session on Opus 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 2026-09-03.