mcp-gateway: Instructions file for Claude Code

CLAUDE.md

mcp-gateway CLAUDE.md is an instructions file for Claude Code from pleaseai/mcp-gateway. It costs 980 tokens per session, scanned A, original, MIT.

A set of instructions for building and using mcp-gateway, a tool-search server in a Turborepo monorepo. A monorepo is one repository that contains multiple related packages.

In plain words
What is it for?
It helps maintainers build all packages or one package, run development and type checks, index tool data, search tools by text or pattern, and install the server in Claude Code.
Why use it?
It gives developers the commands and package names needed to install dependencies, build the project, test it, search its tools, and start the server.

Instructions file for Claude Code

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

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

Reuse

Borrowing it

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

Made for: Claude Code.

Wrote this? Show the measurements

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Per session 980 This file is loaded in full into every session.
When invoked 980 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 $0.00980 $0.00980
Opus 5.5 $0.00392 $0.00392
Sonnet 5.5 $0.00196 $0.00196
Haiku 4.5 $0.00098 $0.00098

Measured 2mo ago against content hash 3a30b56a6d63, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

mcp-gateway 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 · 127 lines

How it starts

The opening of the file, as written. The whole thing — 127 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.

Build & Development Commands

# Install dependencies
bun install

# Build all packages
bun run build

# Build specific package
bun run build --filter=@pleaseai/mcp-core

# Development mode (watch)
bun run dev

# Type check
bun run typecheck

# Run tests
bun run test

# Clean build artifacts
bun run clean

CLI Commands (after build)

# Index tools (without embeddings - faster)
bun packages/mcp/dist/cli.js index packages/mcp/examples/tools.json --no-embeddings

# Index with local embeddings
bun packages/mcp/dist/cli.js index packages/mcp/examples/tools.json

# Search tools
bun packages/mcp/dist/cli.js search "file operations"
bun packages/mcp/dist/cli.js search "read.*file" --mode regex
bun packages/mcp/dist/cli.js search "tools for sending messages" --mode embedding

# Start MCP server
bun packages/mcp/dist/cli.js serve

# Install to IDE
bun packages/mcp/dist/cli.js install --ide claude-code --dry-run

Architecture

This is a Turborepo monorepo with two packages that implement MCP tool search functionality.

Package Dependency Graph

@pleaseai/mcp (packages/mcp)
    └── @pleaseai/mcp-core

@pleaseai/mcp-core (packages/core)
    └── (no internal deps)

Core Package (packages/core)

The search engine with three main subsystems:

  1. Search Strategies (src/search/) - Strategy pattern implementation

    • SearchStrategy interface: initialize(), search(), dispose()
    • RegexSearchStrategy: Pattern matching on tool names/descriptions
    • BM25SearchStrategy: Term frequency ranking algorithm
    • EmbeddingSearchStrategy: Vector similarity search
    • SearchOrchestrator: Routes queries to appropriate strategy
  2. Embedding Providers (src/embedding/) - Provider pattern implementation

    • EmbeddingProvider interface: initialize(), embed(), embedBatch(), dispose()
    • LocalEmbeddingProvider: all-MiniLM-L6-v2 via transformers.js (384 dims)
    • MDBRLeafEmbeddingProvider: MongoDB MDBR-Leaf-IR (256 dims)
    • OpenAIEmbeddingProvider: OpenAI API
    • VoyageAIEmbeddingProvider: Voyage AI API
    • EmbeddingProviderRegistry: Factory for creating providers

Read the full file on GitHub · 127 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. 2mo ago First seen · 127 lines · 980 tokens per session scan A 3a30b56a6d63

Subscribe to this mod's changes

mcp-gateway CLAUDE.md is an instructions file published in the GitHub repository pleaseai/mcp-gateway (5 stars, last pushed 11mo ago), licensed MIT. It adds 980 tokens to every session, about $0.0039 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.

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