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.
npx skills add kazukinagata/shinkoku --skill tax-ebookkeeping-contextgit clone --depth 1 https://github.com/kazukinagata/shinkokuWrote 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.
[](https://agentmods.dev/skills/kazukinagata/shinkoku/tax-ebookkeeping-context)<a href="https://agentmods.dev/skills/kazukinagata/shinkoku/tax-ebookkeeping-context"><img src="https://agentmods.dev/badge/skills/kazukinagata/shinkoku/tax-ebookkeeping-context/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.
<a href="https://agentmods.dev/skills/kazukinagata/shinkoku/tax-ebookkeeping-context"><img src="https://agentmods.dev/badge/skills/kazukinagata/shinkoku/tax-ebookkeeping-context.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00075 | $0.00405 |
| Opus 5 | $0.00037 | $0.00202 |
| Sonnet 5 | $0.00015 | $0.00081 |
| Haiku 4.5 | $0.00007 | $0.00040 |
Grade A, and why
tax-ebookkeeping-context 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 13d 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.
What it actually says
電帳法コンテキスト（Electronic Bookkeeping Context）
このスキルは電子帳簿保存法の要件・対応状況に関するコンテキストを提供する。
電帳法の情報提供
電子帳簿保存法に関する回答を行う際は、references/electronic-bookkeeping.md を読み込んで以下を実行する:
- 3つのカテゴリ（電子帳簿等保存・スキャナ保存・電子取引データ保存）を区別して説明する
- 電子取引データ保存の義務化（令和6年1月1日〜）を確認・案内する
- 優良な電子帳簿の要件と65万円控除（令和9年〜75万円控除）との関係を説明する
- shinkoku の電帳法対応状況（一般・優良の両要件を充足）を確認する
- 個人事業主向けの実務ガイダンス（最低限やるべきこと）を案内する
参照ファイル
| ファイル | 内容 |
|---|---|
references/electronic-bookkeeping.md |
電帳法3カテゴリ・要件・猶予措置・shinkoku対応状況・令和9年改正対応 |
What ships with it
1 file 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.
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.
- 13d ago First seen · 32 lines · 75 tokens per session scan A b81a05dec934
tax-ebookkeeping-context is a skill published in the GitHub repository kazukinagata/shinkoku (359 stars, last pushed 3d ago), licensed MIT. It adds 75 tokens to every session and 405 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 2026-08-30.
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