bitbank-lab-mcp: Instructions file for Claude Code

CLAUDE.md

bitbank-lab-mcp CLAUDE.md is an instructions file for Claude Code from bitbankinc/bitbank-lab-mcp. It costs 686 tokens per session, scanned A, original, MIT.

Repository instructions for bitbank-lab-mcp, a software project whose tools support Japanese-yen trading pairs and return structured results.

In plain words
What is it for?
Use them when testing, linting, formatting, generating types, checking TypeScript, or changing schemas and server transport.
Why use it?
They give contributors the project's commands, coding rules, architecture constraints, and safety requirements for transport and session handling.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: mentions CLAUDE.md; mentions AGENTS.md.

This is bitbankinc/bitbank-lab-mcp's own configuration. It tells Claude Code how to work on bitbank-lab-mcp itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything bitbank-lab-mcp configures →

Reuse

Borrowing it

Nothing to install: this file belongs to bitbankinc/bitbank-lab-mcp. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/bitbankinc/bitbank-lab-mcp/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/bitbankinc/bitbank-lab-mcp

Made for: Claude Code.

Wrote this? Show the measurements

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README.md
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Per session 686 This file is loaded in full into every session.
When invoked 686 The same file — it is already loaded in full.
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 $0.00686 $0.00686
Opus 5 $0.00343 $0.00343
Sonnet 5 $0.00137 $0.00137
Haiku 4.5 $0.00069 $0.00069

Measured 10d ago against content hash 157d3af8e9bb, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

bitbank-lab-mcp 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 10d 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

CLAUDE.md · 39 lines

What it actually says

CLAUDE.md

コマンド

npm test                    # unit / integration(vitest)。tests/e2e/** は除外
npm run test:e2e            # stdio サブプロセス E2E(手動 / nightly。PR では走らせない)
npm run lint:fix            # Oxlint で自動修正
npm run format              # Biome でフォーマット
npm run gen:types           # Zod スキーマから型定義を生成
npm run typecheck           # tsc --noEmit

コード品質

  • リンター(Biome / Oxlint)・pre-commit hook・banned-patterns が検出するルールに従う。 警告やエラーが出たら無視・回避せず修正する。
  • 独自の可視化コード生成は禁止 → .claude/rules/charting.md

アーキテクチャ

  • スキーマ変更は src/schema/ 配下の Zod 定義を単一ソースとする(src/schemas.ts は re-export)
  • 全ツールは Result<T, M> パターン(ok() / fail())で返す
  • lib/ に共通ユーティリティがある処理は、外部ライブラリの直接利用や自前実装をせず lib/ を使う
  • 対応ペアは JPY 建てのみ(表示層が円前提)。非 JPY 建て対応は別途、表示層の quote 通貨移行が前提(lib/validate.tsALLOWED_PAIRS、ガードは tests/lib/validate.test.ts)。
  • stdio 以外のトランスポート(HTTP 等)を src/server.ts に足す変更は、同じ PR で confirmation_token の session / principal 束縛を実装しない限り入れない(ADR-0007 判断事項 B)。 トークンの HMAC ペイロードは action + params + expiresAt のみで session 束縛が無い (署名鍵の per-process nonce はプロセス境界を閉じるだけで、HTTP では 1 プロセスに複数 セッションが同居するため session 境界には効かない)。UI スナップショットの キーと MRTR の bind は未設定 sessionId を空文字に畳んでいる。stdio は 1 接続なので今日は無害だが、 HTTP を足した瞬間に別クライアントからの execute を弾けなくなる。ガードは tests/http-transport-tripwire.test.ts(必要な実装内容が失敗メッセージに出る)。

リポジトリルール

  • main ブランチ保護。PR 経由でマージ。
  • AGENTS.mdCLAUDE.md への symlink。
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. 10d ago First seen · 39 lines · 686 tokens per session scan A 157d3af8e9bb

Subscribe to this mod's changes

bitbank-lab-mcp CLAUDE.md is an instructions file published in the GitHub repository bitbankinc/bitbank-lab-mcp (4 stars, last pushed 13d ago), licensed MIT. It adds 686 tokens to every session, about $0.0034 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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