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 agentmods add instructions/sonicgarden/sgcop/claude-mdgit clone --depth 1 https://github.com/SonicGarden/sgcopWrote 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/instructions/sonicgarden/sgcop/claude-md)<a href="https://agentmods.dev/instructions/sonicgarden/sgcop/claude-md"><img src="https://agentmods.dev/badge/instructions/sonicgarden/sgcop/claude-md.svg" alt="Measured on agentmods" 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 | $0.00458 | $0.00458 |
| Opus 5 | $0.00229 | $0.00229 |
| Sonnet 5 | $0.00092 | $0.00092 |
| Haiku 4.5 | $0.00046 | $0.00046 |
Grade A, and why
sgcop CLAUDE.md 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 yesterday.
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
sgcop
SonicGarden 標準の RuboCop 設定と、カスタム Cop を提供する Gem。
コマンド
bundle exec rspec # 全テスト実行
bundle exec rspec spec/rubocop/cop/sgcop/some_cop_spec.rb # 特定 Cop のテスト
ruby add_doc_links.rb # rubocop.yml に cop ドキュメントリンクを付加
アーキテクチャ
lib/rubocop/cop/sgcop/— カスタム Cop の実装lib/sgcop.rb— 全 Cop の require エントリポイントspec/rubocop/cop/— Cop のテスト（RSpec + RuboCop::RSpec::ExpectOffense）ruby/rubocop.yml— Ruby プロジェクト向け設定rails/rubocop.yml— Rails プロジェクト向け設定（ruby を inherit）
新しい Cop を追加する手順
lib/rubocop/cop/sgcop/に Cop ファイルを作成（クラス/モジュールに日本語 doc comment を付ける。Style/Documentationが有効なため必須）lib/sgcop.rbにrequireを追加spec/rubocop/cop/sgcop/に対応するテストを追加rails/rubocop.ymlまたはruby/rubocop.ymlに設定を追加ruby add_doc_links.rbでドキュメントリンクを付加README.mdのカスタムCop一覧テーブルを更新
Cop のテスト記述
expect_offense / expect_no_offenses ヘルパーを使う RuboCop 標準テストパターン。
spec/support/ に共通ヘルパーあり。
開発スタイル
RED/TDD で進める。テストを先に書いて失敗（RED）を確認してから実装する。
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.
- yesterday First seen · 38 lines · 458 tokens per session scan A 6459c58e2b36
sgcop CLAUDE.md is an instructions file published in the GitHub repository SonicGarden/sgcop (22 stars, last pushed 5d ago), licensed MIT. It adds 458 tokens to every session, about $0.0023 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 2026-09-04.
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