skill-forge

skill-forge is a skill for Claude Code from This-HW/claude-code-kit. It costs 51 tokens per session (1,425 once invoked), scanned A, original, MIT.

A draft-maker for turning a difficult, repeatable solution into a reusable coding-agent skill. It checks whether the solution is reproducible, likely to recur, and not already covered.

In plain words
What is it for?
Use it after solving a non-trivial problem to assess the solution and write a skill draft. In its supported project, it can also prepare the files and synchronization steps after approval.
Why use it?
It prevents useful procedures from disappearing when a work session ends. It also avoids creating unnecessary skills when a note or improvement to an existing skill is enough.

Skill for Claude Code

Written for Claude Code: effort in frontmatter. Also seen: model in frontmatter; reads .claude/ paths; mentions CLAUDE.md.

Needs its repository: it runs a file that does not travel with it, so clone the repository first. The line is python3 scripts/check_doc_counts.py.

Part of the claude-code-kit plugin — 20 skills, 4 hooks shipped together

Good fit Use it after solving a non-trivial problem to assess the solution and write a skill draft. In its supported project, it can also prepare the files and synchronization steps after approval.

Compare 6 skills from other repositories ↓
Install

Getting it into your agent

It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.

Clone the repo
git clone --depth 1 https://github.com/This-HW/claude-code-kit
agentmods
npx agentmods add skills/this-hw/claude-code-kit/skill-forge

Made for: Claude Code.

Or install claude-code-kit, the plugin that ships this one along with the rest of its 20 skills, 4 hooks.

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 skill-forge

README.md
[![agentmods](https://agentmods.dev/badge/skills/this-hw/claude-code-kit/skill-forge/github.svg)](https://agentmods.dev/skills/this-hw/claude-code-kit/skill-forge)
Your own site
<a href="https://agentmods.dev/skills/this-hw/claude-code-kit/skill-forge"><img src="https://agentmods.dev/badge/skills/this-hw/claude-code-kit/skill-forge/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 skill-forge

Your own site · 80×15
<a href="https://agentmods.dev/skills/this-hw/claude-code-kit/skill-forge"><img src="https://agentmods.dev/badge/skills/this-hw/claude-code-kit/skill-forge.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 51 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,425 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 $0.00051 $0.01425
Opus 5.5 $0.00020 $0.00570
Sonnet 5.5 $0.00010 $0.00285
Haiku 4.5 $0.00005 $0.00143

Measured 1mo ago against content hash 6f52ca78c7f2, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

skill-forge 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.

plugins/common/skills/skill-forge/SKILL.md · 101 lines

How it starts

The opening of the file, as written. The whole thing — 101 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Skill Forge — 성공 경험을 재사용 자산으로

kit의 학습 루프는 비대칭이다. 실패는 ledger → LESSONS → /self-improve로 흐르는데, 성공은 아무 데도 안 남는다. 어려운 문제를 푼 세션의 절차 지식이 세션 종료와 함께 소멸하고, 다음에 같은 문제를 만나면 처음부터 다시 푼다.

이 스킬은 그 절반을 메운다 — 단, 아무 성공이나 스킬이 되지는 않는다.

적용 범위: 승인 후 적용 단계(스킬 파일 생성 + 3표면 동기화 + 카운트/버전 게이트)는 kit 레포 자체의 개발을 전제한다. 소비자 프로젝트에서는 3조건 판정과 초안 작성까지가 유효하며, 산출한 초안은 그 프로젝트의 .claude/skills/에 사용자가 직접 배치한다.

포징 임계 (3조건 — AND)

조건 판정 질문 미충족 시 강등 경로
재현성 이 절차를 그 세션의 맥락 없이 그대로 다시 실행할 수 있는가? ./scripts/feedback.sh upsert로 ledger 한 줄
반복성 앞으로 다시 마주칠 문제인가? (1회성 마이그레이션·특정 사고 대응은 아니다) Work 문서(progress.md/decisions.md)에 기록
비중복 기존 스킬로 커버되지 않는가? 기존 스킬 보강 제안으로 전환 (새 스킬 만들지 않음)

세 번째 조건이 가장 자주 걸린다. "새 스킬이 있으면 편하겠다"는 거의 항상 "기존 스킬에 한 절이 빠져 있다"의 오독이다. 스킬 개수는 자산이 아니라 비용이다 — 트리거 맵이 커질수록 어느 것도 안 걸린다.

절차

1. 후보 서술 [건너뛰기 금지]

무엇을 풀었는지가 아니라 **"다음 사람이 같은 상황에서 무엇을 해야 하는가"**로 쓴다. 전자는 회고이고 후자만 스킬이다.

2. 3조건 판정 [건너뛰기 금지]

각 조건에 근거와 함께 판정을 적는다. "그럴 것 같다"는 판정이 아니다.

비중복 판정은 실제 목록과 대조한다:

ls plugins/common/skills/                       # kit 스킬
ls ~/.claude/plugins/*/*/skills/ 2>/dev/null    # 설치된 다른 플러그인 (없으면 건너뛴다)

다른 플러그인의 존재를 가정하지 않는다. superpowers 등이 설치돼 있으면 그 목록과도 대조하고, 없으면 그 단계를 조용히 건너뛴다 (fail-open). 특정 플러그인이 있어야만 동작하는 절차는 consumer-first 위반이다.

미충족이면 여기서 멈추고 강등 경로를 실행한 뒤 보고한다.

3. 초안 작성 (파일로 남기지 않는다)

/skill-creator의 템플릿 규약을 따른다:

  • frontmatter: name(kebab-case, 파일 경로와 일치) · description(영문, 트리거 조건 포함) · model · effort
  • 본문: 사용 시점 표 → 절차(각 단계에 [건너뛰기 금지] 여부 명시) → 실패 모드 → delegation signal
  • 정직한 한계 절을 반드시 넣는다 — 이 스킬이 보장하지 않는 것.

4. 사용자 승인 대기 [건너뛰기 금지]

초안 전문과 3조건 판정 근거를 함께 제시하고 승인을 받는다. 승인 없는 상태에서 다음 단계로 넘어가지 않는다.

Read the full file on GitHub · 101 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. 1mo ago First seen · 101 lines · 51 tokens per session scan A 6f52ca78c7f2

Subscribe to this mod's changes

skill-forge is a skill published in the GitHub repository This-HW/claude-code-kit (4 stars, last pushed 1mo ago), licensed MIT. It adds 51 tokens to every session and 1,425 once invoked, about $0.0002 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 2026-08-31.

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