mcp-ts-morph: Instructions file for Claude Code

CLAUDE.md

mcp-ts-morph CLAUDE.md is an instructions file for Claude Code from SiroSuzume/mcp-ts-morph. It costs 2,089 tokens per session, scanned A, original, MIT.

A project instruction file for an MCP server that provides TypeScript and JavaScript code-refactoring tools through ts-morph. Ts-morph is a library for safely analyzing and changing source code.

In plain words
What is it for?
Use it when building the server, running unit or end-to-end tests, or changing tools such as symbol moves, renaming, import-path cleanup, and function-signature changes.
Why use it?
It records the build, test, architecture, and end-to-end checking rules needed to change refactoring logic safely.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: reads .claude/ paths; mentions CLAUDE.md; mentions Claude Code.

This is SiroSuzume/mcp-ts-morph's own configuration. It tells Claude Code how to work on mcp-ts-morph 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 mcp-ts-morph configures →

Needs its repository: it reads a path above its own folder, which exists only inside the repository. The line is import { createTsMorphProject } from "../_utils/ts-morph-project";.

Reuse

Borrowing it

Nothing to install: this file belongs to SiroSuzume/mcp-ts-morph. 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/SiroSuzume/mcp-ts-morph/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/SiroSuzume/mcp-ts-morph

Made for: Claude Code.

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Per session 2,089 This file is loaded in full into every session.
When invoked 2,089 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 $0.02089 $0.02089
Opus 5 $0.01045 $0.01045
Sonnet 5 $0.00418 $0.00418
Haiku 4.5 $0.00209 $0.00209

Measured 9d ago against content hash 1577d6729e98, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

mcp-ts-morph 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 9d 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.md · 163 lines

How it starts

The opening of the file, as written. The whole thing — 163 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

概要

MCP ts-morph Refactoring Tools - ts-morphを利用したTypeScript/JavaScriptのリファクタリングツールを提供するMCPサーバー。

開発コマンド

ビルド

pnpm build        # TypeScriptをコンパイル(dist/に出力)
pnpm clean        # distディレクトリをクリーン

テスト

pnpm test         # テスト実行(単一スレッドで実行)
pnpm test:watch   # ウォッチモードでテスト実行
pnpm test -- path/to/test.ts  # 特定のテストファイルを実行
pnpm test:e2e     # 実リポジトリ E2E(hono/zustand を clone して全ツール適用)

E2E テスト(pnpm test:e2e

e2e/ は、バージョン固定の実 OSS(hono / zustand)を clone し、各 MCP ツールを 実プロジェクトに適用して「差分緑」(baseline と比較し新規型エラー・新規失敗テスト が無いこと)を検証する。ユニットテストでは拾えない実世界の AST 不整合を掘り当てる (例: move_symbol_to_file の逆向き import バグ)。

  • デフォルトの pnpm test からは除外(vitest.config.ts の exclude)。CI には 未組み込み(nightly + 手動 dispatch を予定)。
  • 初回は clone + 依存インストールが走る(bun / pnpm が必要。無ければ baseline 未取得で各ケース skip)。2 回目以降は e2e/.cache/*.ready マーカで再利用。
  • 実行時間の目安: キャッシュ有りで 2〜3 分。

Claude への指示: src/ts-morph/** のリファクタロジック(特に move-symbol-to-file / rename-* / remove-path-alias / change-signature)に 触れた変更は、仕上げ段階(コミット前 / PR 化前)で pnpm test:e2e を実行して 実リポジトリで退行が無いことを確認すること。時間がかかるので開発の各イテレーション ではなく、まとまった作業の最後に回す。ネットワークや bun 不在で skip された場合は その旨をユーザーに伝える。

型チェック・リント・フォーマット

pnpm check-types  # TypeScriptの型チェック(コンパイルなし)
pnpm lint         # Biomeでリントチェック
pnpm lint:fix     # Biomeでリント修正
pnpm format       # Biomeでコードフォーマット

デバッグ

pnpm inspector    # MCP Inspectorでデバッグ実行

リリース(バージョン bump)

Git タグが単一の真実の source。手で bump しない。

  • package.jsonversionsrc/version.tsVERSION はどちらも 0.0.0-development に固定。
  • リリースは git tag vX.Y.Z && git push origin vX.Y.Z のみ。
  • .github/workflows/release.yml が tag から値を抽出して両ファイルを書き換え、pnpm buildpnpm testdist の整合性確認 → pnpm publish を実行する。
  • 詳細手順は .claude/skills/release/SKILL.md および README の「リリース」セクション参照。
  • ユーザーから「リリース」「タグを打って」等を言われたら release skill を使うこと。

プロジェクト構造

コアアーキテクチャ

Read the full file on GitHub · 163 lines

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. 9d ago First seen · 163 lines · 2,089 tokens per session scan A 1577d6729e98

Subscribe to this mod's changes

mcp-ts-morph CLAUDE.md is an instructions file published in the GitHub repository SiroSuzume/mcp-ts-morph (16 stars, last pushed 2mo ago), licensed MIT. It adds 2,089 tokens to every session, about $0.0104 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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