venom: Skill for Claude Code

.claude/skills/mistake-recorder/SKILL.md

mistake-recorder is a skill for Claude Code from KirSsuRyu/venom. It costs 79 tokens per session (780 once invoked), scanned A, original, MIT.

A coding-agent memory system that records mistakes, corrections, lessons, and architecture decisions in files for later sessions.

In plain words
What is it for?
Use it while debugging, responding to user corrections, handling failed tests or checks, and learning non-obvious project details.
Why use it?
It reduces the chance of repeating the same error or forgetting an important fact about the codebase. It also keeps lessons organized without recording secrets or personal information.

Skill for Claude Code

Written for Claude Code: installed under .claude/.

This is KirSsuRyu/venom's own configuration. It tells Claude Code how to work on venom 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 venom configures →

Reuse

Borrowing it

Nothing to install: this file belongs to KirSsuRyu/venom. 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/KirSsuRyu/venom/main/.claude/skills/mistake-recorder/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/KirSsuRyu/venom

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 mistake-recorder

README.md
[![agentmods](https://agentmods.dev/badge/skills/kirssuryu/venom/mistake-recorder/github.svg)](https://agentmods.dev/skills/kirssuryu/venom/mistake-recorder)
Your own site
<a href="https://agentmods.dev/skills/kirssuryu/venom/mistake-recorder"><img src="https://agentmods.dev/badge/skills/kirssuryu/venom/mistake-recorder/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 mistake-recorder

Your own site · 80×15
<a href="https://agentmods.dev/skills/kirssuryu/venom/mistake-recorder"><img src="https://agentmods.dev/badge/skills/kirssuryu/venom/mistake-recorder.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 79 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 780 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 $0.00079 $0.00780
Opus 5 $0.00039 $0.00390
Sonnet 5 $0.00016 $0.00156
Haiku 4.5 $0.00008 $0.00078

Measured 10d ago against content hash f90942738a20, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

mistake-recorder 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 10d 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/mistake-recorder/SKILL.md · 65 lines

What it actually says

실수 기록 스킬

이 스킬은 이 하네스의 핵심 메커니즘이다. 같은 실수를 두 번 하지 않는 유일한 방법은 적어 두는 것이다.

언제 트리거하나

  • 테스트가 가정 때문에 실패했을 때
  • 사용자가 "그게 아니야", "그렇게 하면 안 돼", "다시" 같은 교정을 했을 때
  • 자기 수정을 다시 읽고 틀린 걸 발견했을 때
  • 린트/타입체크/런타임이 작성한 코드를 거부했을 때
  • 작업 도중 코드베이스의 비자명한 사실을 알게 됐을 때

절차

  1. 무엇이 일어났는지 한 줄로 요약한다.

  2. 분류한다.

    • 실수.claude/memory/mistakes.md
    • 항구적 교훈.claude/memory/lessons.md
    • 아키텍처 결정.claude/memory/decisions.md
  3. mistakes.md 항목 작성:

    ## YYYY-MM-DDTHH:MM:SSZ — <한 줄 제목>
    - 맥락: <어떤 작업 중이었는가>
    - 한 일: <틀린 행동>
    - 왜 틀렸나: <증상이 아니라 근본 원인>
    - 옳은 접근: <다음엔 어떻게>
    - 태그: #<영역> #<언어> #<도구>
    
  4. lessons.md 항목 작성 (1~5줄, 태그 포함):

    - [#tag] <한 줄 사실> — <왜 중요한가, 짧게>
    
  5. decisions.md 항목 작성 (ADR 형식):

    ## ADR-NNNN: <제목>
    - 날짜: YYYY-MM-DD
    - 상태: 채택
    - 맥락: ...
    - 결정: ...
    - 결과: ...
    
  6. Edit/Write 도구로 직접 추가한다. (PostToolUseFailure hook이 자동으로 초안을 채워주므로, 그 경우엔 교훈 줄만 채우면 된다.)

좋은 항목 vs 나쁜 항목

  • ❌ 나쁨: "테스트가 깨졌다."
  • ✅ 좋음: "타임존 변환을 가정해 datetime.utcnow()를 썼는데, 이 프로젝트는 모든 시각을 pendulum.now('UTC')로 다루기 때문에 비교가 깨졌다. 교훈: 새 시간 객체는 항상 pendulum을 사용한다."

위생

  • 비밀, PII, 고객 식별 정보 금지.
  • 한 파일이 ~500줄을 넘으면 진화 대기열이 가득 찼다는 신호evolve 스킬을 먼저 실행하여 규칙/hook/스킬로 승급한다(50-memory-protocol.md와 정합).
  • 동일 실수의 중복 기록은 횟수 카운터를 업데이트한다.
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. 10d ago First seen · 65 lines · 79 tokens per session scan A f90942738a20

Subscribe to this mod's changes

mistake-recorder is a skill published in the GitHub repository KirSsuRyu/venom (5 stars, last pushed 4mo ago), licensed MIT. It adds 79 tokens to every session and 780 once invoked, about $0.0004 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 2026-08-31.

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