my-skill

my-skill is a skill for Claude Code, Codex from forest6511/claude-code-recipes-v2. It costs 9 tokens per session (295 once invoked), scanned A, original, MIT.

A guide for writing and configuring coding-agent skills, including their metadata and task instructions. It also shows common formatting mistakes that can make a skill fail or be ignored.

In plain words
What is it for?
Use it when creating or reviewing skill files, fixing their headers, or adding commands that need a safe fallback when they cannot run.
Why use it?
It helps avoid invalid skill definitions, such as metadata that cannot be parsed or instructions that give an agent no task to perform.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/forest6511/claude-code-recipes-v2/before
Any agent
npx skills add forest6511/claude-code-recipes-v2 --skill before
Clone the repo
git clone --depth 1 https://github.com/forest6511/claude-code-recipes-v2

Made for: Claude Code, Codex.

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 my-skill

README.md
[![agentmods](https://agentmods.dev/badge/skills/forest6511/claude-code-recipes-v2/before.svg)](https://agentmods.dev/skills/forest6511/claude-code-recipes-v2/before)
Your own site
<a href="https://agentmods.dev/skills/forest6511/claude-code-recipes-v2/before"><img src="https://agentmods.dev/badge/skills/forest6511/claude-code-recipes-v2/before.svg" alt="Measured on agentmods" height="20"></a>
Per session 9 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 295 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00009 $0.00295
Opus 5 $0.00005 $0.00148
Sonnet 5 $0.00002 $0.00059
Haiku 4.5 $0.00001 $0.00030

Measured 5d ago against content hash 9b89417f29dc, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

my-skill 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 5d 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.

ch09-skills-tips/recipe-51/common-mistakes/before/SKILL.md · 41 lines

What it actually says

失敗例1の問題

descriptionの値にコロン(:)が含まれており、YAMLの構文と衝突します。 フロントマターが完全に無視され、デフォルト値にフォールバックします。


失敗例2: nameの制約違反

---

name: My_Skill

---

大文字とアンダースコアはname制約に違反します。


失敗例3: context:forkにタスクがない

---

name: api-conventions

context: fork

---

API設計では以下の規約に従ってください。

- RESTfulなリソース設計

- 一貫したエラーレスポンス

サブエージェントは実行すべきタスクがないため何も返しません。


失敗例4: !commandにフォールバックがない

---

name: pr-review

---

## PR差分

!gh pr diff

PRがない場合: "no pull requests found..." がそのまま展開されます。

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. 5d ago First seen · 41 lines · 0 tokens per session scan A 9b89417f29dc

Subscribe to this mod's changes

my-skill is a skill published in the GitHub repository forest6511/claude-code-recipes-v2 (5 stars, last pushed 4mo ago), licensed MIT. It adds 9 tokens to every session and 295 once invoked, about $0.0000 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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