What is jsc-typescript-ast-mcp CLAUDE.md?

Repository guidance for a TypeScript code-analysis server that uses abstract syntax trees, structured representations of source code, to inspect programs.

Understanding and developing tools that find references, dependencies, and component trees in TypeScript code.

It gives the coding agent the project layout, important files, and development commands needed to work safely in the repository.

How jscoobyced/jsc-typescript-ast-mcp configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to jscoobyced/jsc-typescript-ast-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/jscoobyced/jsc-typescript-ast-mcp/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/jscoobyced/jsc-typescript-ast-mcp

Made for: Claude Code.

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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/jscoobyced/jsc-typescript-ast-mcp/claude-md/github.svg)](https://agentmods.dev/instructions/jscoobyced/jsc-typescript-ast-mcp/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/jscoobyced/jsc-typescript-ast-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/jscoobyced/jsc-typescript-ast-mcp/claude-md/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/jscoobyced/jsc-typescript-ast-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/jscoobyced/jsc-typescript-ast-mcp/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 757 This file is loaded in full into every session.

When invoked 757 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.

Model	Per session	Once invoked
Fable 5.1	$0.00757	$0.00757
Opus 5.5	$0.00303	$0.00303
Sonnet 5.5	$0.00151	$0.00151
Haiku 4.5	$0.00076	$0.00076

Measured 2mo ago against content hash 9d801112a040, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

jsc-typescript-ast-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 2mo 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 · 78 lines

How it starts

The opening of the file, as written. The whole thing — 78 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.

Project Overview

This is a Model Context Protocol (MCP) server that provides TypeScript AST (Abstract Syntax Tree) analysis capabilities. It's built using the @modelcontextprotocol/sdk and integrates with ts-morph to analyze TypeScript code.

Architecture

The project has a simple architecture:

Main entry point: code/src/index.ts - Sets up the MCP server and registers tools
Tool implementations:
- code/src/ts-morph/references.ts - Implements the find_reference tool using ts-morph
- code/src/ts-morph/dependency.ts - Implements the find_dependency tool
- code/src/ts-morph/componentTree.ts - Implements the component_tree tool
The server is designed to run as an MCP server over stdio

Key Files

code/src/index.ts: Main server entry point that initializes the MCP server and registers tools
code/src/ts-morph/references.ts: Implements the find_reference tool using ts-morph library
code/src/ts-morph/dependency.ts: Implements the find_dependency tool
code/src/ts-morph/componentTree.ts: Implements the component_tree tool
code/src/ts-morph/utils/extractJsx.ts: Utility for extracting JSX information including onClick handlers
code/src/ts-morph/utils/props.ts: Utility for extracting props and onClick information
code/src/ts-morph/utils/types.ts: Type definitions including TreeNode and OnClickInfo
code/tsconfig.json: TypeScript compilation configuration
code/package.json: Project metadata and scripts
code/.env.example: Example environment variables file
code/.mcp.example.json: Example MCP configuration file

Development Commands

yarn --cwd code build: Compiles TypeScript to JavaScript in the dist directory
yarn --cwd code test:mcp: Runs the MCP server with the inspector
yarn --cwd code format: Formats code using Prettier

How to Run

The server is designed to run as an MCP server over stdio. You can run it with:

Read the full file on GitHub · 78 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.

2mo ago First seen · 78 lines · 757 tokens per session scan A 9d801112a040

Subscribe to this mod's changes

jsc-typescript-ast-mcp CLAUDE.md is an instructions file published in the GitHub repository jscoobyced/jsc-typescript-ast-mcp (0 stars, last pushed 7mo ago), licensed MIT. It adds 757 tokens to every session, about $0.0030 per session on Opus 5.5. 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.

jsc-typescript-ast-mcp CLAUDE.md next to 6 instructions from other repositories
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jsc-typescript-ast-mcp: Instructions file for Claude Code