Borrowing it
Nothing to install: this file belongs to syrin-labs/cli. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/syrin-labs/cli/main/CLAUDE.mdgit clone --depth 1 https://github.com/syrin-labs/cliWrote 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/syrin-labs/cli/claude-md)<a href="https://agentmods.dev/instructions/syrin-labs/cli/claude-md"><img src="https://agentmods.dev/badge/instructions/syrin-labs/cli/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.
<a href="https://agentmods.dev/instructions/syrin-labs/cli/claude-md"><img src="https://agentmods.dev/badge/instructions/syrin-labs/cli/claude-md.svg" alt="Reviewed on agentmods" width="80" 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 | $0.03200 | $0.03200 |
| Opus 5.5 | $0.01280 | $0.01280 |
| Sonnet 5.5 | $0.00640 | $0.00640 |
| Haiku 4.5 | $0.00320 | $0.00320 |
Grade A, and why
cli 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.
How it starts
The opening of the file, as written. The whole thing — 452 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
Syrin is a runtime intelligence system for MCP (Model Context Protocol) servers. It helps developers validate, test, and reason about MCP execution before production deployment through static analysis, contract-based testing, and interactive development environments.
Development Commands
Building and Running
# Build the project (TypeScript compilation + path alias resolution + template copy)
npm run build
# Run Syrin CLI locally (rebuilds and executes)
npm run syrin <command>
# Example: Run dev mode locally
npm run syrin dev --exec
Testing
# Run all tests (watch mode)
npm test
# Run tests once
npm run test:run
# Run tests with coverage
npm run test:coverage
# Run tests with UI
npm run test:ui
# Run specific test file
npm test -- src/runtime/dev/session.test.ts
Code Quality
# Lint the codebase
npm run lint
# Lint and fix issues
npm run lint:fix
# Format code (Prettier)
npm run format
# Check formatting
npm run format:check
# Type check without building
npm run type-check
Publishing
# Prepare for publish (runs build automatically)
npm run prepublishOnly
High-Level Architecture
Syrin uses a layered, event-driven architecture with five primary layers:
1. CLI Command Layer (/cli)
Entry point using Commander.js. Commands map to handlers that orchestrate lower layers:
init: Initialize project configurationdoctor: Validate configuration and environmentdev: Interactive LLM-MCP development environmenttest: Contract-based tool testing with sandboxinganalyse: Static validation of MCP tool contractslist: Inspect tools, resources, and promptsconfig: Manage local/global configurationupdate/rollback: Version management
All commands use unified error handling via command-error-handler.ts.
2. Configuration Management (/config)
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 · 452 lines · 3,200 tokens per session scan A ee019b236542
cli CLAUDE.md is an instructions file published in the GitHub repository syrin-labs/cli (48 stars, last pushed 8mo ago), licensed ISC. It adds 3,200 tokens to every session, about $0.0128 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 2026-08-30.
Other instructions, from other repositories
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
deno copilot-instructions.md
Copilot instructions for denoland/deno, covering deno development guide for github copilot, network access, high level overview, key directories and key files to understand first.