add-skill

add-skill is a skill for Claude Code from kpab/awesome-fun-claude-skills. It costs 71 tokens per session (467 once invoked), scanned A, original, CC0-1.0.

A procedure for adding one playful or entertainment-focused skill to a GitHub-based list. It checks the source repository, eligibility, duplicates, category, YAML entry, and regenerated README.

In plain words
What is it for?
Use it when given a skill URL to add, to verify that the repository qualifies, update data/skills.yaml, select a category, and regenerate the README.
Why use it?
It prevents non-GitHub sources, practical productivity tools, duplicate entries, and hand-edited generated content from being added incorrectly.

Skill for Claude Code

Written for Claude Code: installed under .claude/.

Good fit Use it when given a skill URL to add, to verify that the repository qualifies, update data/skills.yaml, select a category, and regenerate the README.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/kpab/awesome-fun-claude-skills/add-skill
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 kpab/awesome-fun-claude-skills --skill add-skill
Clone the repo
git clone --depth 1 https://github.com/kpab/awesome-fun-claude-skills

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 add-skill

README.md
[![agentmods](https://agentmods.dev/badge/skills/kpab/awesome-fun-claude-skills/add-skill/github.svg)](https://agentmods.dev/skills/kpab/awesome-fun-claude-skills/add-skill)
Your own site
<a href="https://agentmods.dev/skills/kpab/awesome-fun-claude-skills/add-skill"><img src="https://agentmods.dev/badge/skills/kpab/awesome-fun-claude-skills/add-skill/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 add-skill

Your own site · 80×15
<a href="https://agentmods.dev/skills/kpab/awesome-fun-claude-skills/add-skill"><img src="https://agentmods.dev/badge/skills/kpab/awesome-fun-claude-skills/add-skill.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 71 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 467 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 $0.00071 $0.00467
Opus 5 $0.00036 $0.00234
Sonnet 5 $0.00014 $0.00093
Haiku 4.5 $0.00007 $0.00047

Measured 11d ago against content hash aa5362cb78ff, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

add-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 11d 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/add-skill/SKILL.md · 19 lines

What it actually says

スキルをリストに追加する

  1. 渡された URL から情報を収集する
    • GitHub リポジトリなら: gh repo view <owner>/<repo> --json name,description,stargazerCount,updatedAt,url
    • 記事(Zenn/Qiita等)の URL を渡されたら WebFetch で内容を確認し、記事内のリポジトリリンクを正とする。リポジトリが存在しなければ掲載対象外(その旨をユーザーに伝えて終了)
  2. 掲載基準を確認する: ネタ系・エンタメ系(ペルソナ・ジョーク・遊び系)であること。実務・生産性系なら掲載せず、その旨をユーザーに伝えて終了
  3. data/skills.yaml の既存エントリと重複していないか確認する(URL とスキル名で検索)
  4. YAML エントリを作成して data/skills.yaml に追記する
    • description は英語で1〜2文。スキルの「ネタ」が伝わる書き方にする(例: "Turns Claude into a Hakata-dialect gal who explains tech terms with youthful slang")
    • category は既存カテゴリから選ぶ。どれにも合わなければ新カテゴリをユーザーに提案して確認を取る
    • スキーマの詳細は data/skills.yaml 冒頭のコメントを参照
  5. README を再生成する: go run ./cmd/genreadme
  6. 生成後の README.md の該当箇所を表示してユーザーに確認してもらう
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. 11d ago First seen · 19 lines · 71 tokens per session scan A aa5362cb78ff

Subscribe to this mod's changes

add-skill is a skill published in the GitHub repository kpab/awesome-fun-claude-skills (1 stars, last pushed 2mo ago), licensed CC0-1.0. It adds 71 tokens to every session and 467 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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