update-skills

update-skills is a skill for Claude Code, Codex from geekfujiwara/CodeAppsDevelopmentStandard. It costs 202 tokens per session (4,550 once invoked), scanned A, original, MIT.

A workflow for creating or updating coding-agent skills, which are reusable instructions, scripts, and reference material for specific tasks.

In plain words
What is it for?
It helps write SKILL.md files, add references and reusable scripts, validate step numbering and folders, scan for sensitive data, verify official details, and prepare a GitHub pull request.
Why use it?
It keeps skills generic, organised, and free of company-specific secrets while checking their structure and documenting recurring problems.

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/geekfujiwara/codeappsdevelopmentstandard/update-skills
Any agent
npx skills add geekfujiwara/CodeAppsDevelopmentStandard --skill update-skills
Clone the repo
git clone --depth 1 https://github.com/geekfujiwara/CodeAppsDevelopmentStandard

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 update-skills

README.md
[![agentmods](https://agentmods.dev/badge/skills/geekfujiwara/codeappsdevelopmentstandard/update-skills.svg)](https://agentmods.dev/skills/geekfujiwara/codeappsdevelopmentstandard/update-skills)
Your own site
<a href="https://agentmods.dev/skills/geekfujiwara/codeappsdevelopmentstandard/update-skills"><img src="https://agentmods.dev/badge/skills/geekfujiwara/codeappsdevelopmentstandard/update-skills.svg" alt="Measured on agentmods" height="20"></a>
Per session 202 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,550 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 $0.00202 $0.04550
Opus 5 $0.00101 $0.02275
Sonnet 5 $0.00040 $0.00910
Haiku 4.5 $0.00020 $0.00455

Measured 5d ago against content hash c530fff16173, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

update-skills 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.

The scan reads SKILL.md. This mod also ships 3 executable files (scripts/manage_skill_pr.py, scripts/publish_skill.py, scripts/validate_skill.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

.github/skills/update-skills/SKILL.md · 214 lines

How it starts

The opening of the file, as written. The whole thing — 214 lines — stays where its author put it; the contents beside it link to each section on GitHub.

スキル作成・更新 & PR 作成スキル

スキル(SKILL.md + references/ + scripts/)を新規作成または更新し、 リモートリポジトリへ PR を作成・更新するまでを一貫して行う。 サンプル(code-apps/samples/)の追加・更新時は sample-packaging.md のチェックも実施する。

このスキル自身が「良いスキルの形」のテンプレートになっている。守るべき原則は以下の 6 つ。

原則 内容
役割分離 SKILL.md = 正常系のみ。参考情報・異常系references/、利用スクリプトは scripts/
汎用化 テナント・組織・テーマに依存しない。パラメータは references/.env.example に定義し、実値は .env から読む
秘匿化 会社名・個別プロジェクト名・実 GUID・URL・メール・シークレットを排除(→ Step 3 のスキャン)
シンプル 本文は短く。冗長な説明は references/ に逃がす。手順の番号は整数の Step で統一
自動化優先 公式仕様は Microsoft Learn MCP で検証、ブラウザ操作は VS Code 統合ブラウザで自動化(→ Step 4)
再発防止 作業中にバグ・落とし穴を見つけて直したら references/troubleshooting.md への記録だけで終わらせず、同じ入力パターンで二度と起きないよう scripts/ 本体に恒久的な事前チェック(アサーション/事前検証)を追加し、正常系(成功する実行)でも毎回そのチェックが動く状態にする(→ Step 1 の 6)

前提ツール: Git、GitHub CLI(gh、認証済み)、Python 3。 異常系・詰まりどころは references/troubleshooting.md、 PR の更新/新規判断とマージ順は references/pr-strategy.md を参照。

スキル同梱スクリプト(再利用)

scripts/ は汎用化済み。値は引数または .envreferences/.env.example 参照)から取得する。

スクリプト 用途
scripts/validate_skill.py 構成検証: フォルダ名=name 一致 / Step 番号が整数連番 / referencesscripts の有無 / 秘匿情報スキャン(Step 3・7)
scripts/manage_skill_pr.py リモートのオープン PR を走査し、対象スキルに触れる PR を検出して「更新 or 新規」とマージ順を提示(Step 5)
scripts/publish_skill.py 公開を一括自動化: PR 先リポジトリを一時 clone → ブランチ → スキル+集約ファイルをコピー → 検証 → commit → push → PR 作成/更新(Step 6)。--dry-run 対応

標準フォルダ構成

<skill-name>/                 # kebab-case。frontmatter name と完全一致
├── SKILL.md                  # 正常系のワークフロー(本文 ~1,500–2,000 語以内)
├── references/               # 参考情報・異常系(オンデマンド読込)
│   ├── troubleshooting.md    # 異常系・既知の不具合
│   ├── .env.example          # スクリプトが使うパラメータの定義(実値は書かない)
│   └── <topic>.md            # その他の参考資料(任意)
└── scripts/                  # 利用したスクリプト(すべて汎用化)
    └── <verb>_<noun>.py

Read the full file on GitHub · 214 lines

Files

What ships with it

7 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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 · 214 lines · 202 tokens per session scan A c530fff16173

Subscribe to this mod's changes

update-skills is a skill published in the GitHub repository geekfujiwara/CodeAppsDevelopmentStandard (60 stars, last pushed yesterday), licensed MIT. It adds 202 tokens to every session and 4,550 once invoked, about $0.0010 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 2026-08-30.