Borrowing it
Nothing to install: this file belongs to tao2years/llm_router. 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/tao2years/llm_router/main/CLAUDE.mdgit clone --depth 1 https://github.com/tao2years/llm_routerWrote 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/tao2years/llm_router/claude-md)<a href="https://agentmods.dev/instructions/tao2years/llm_router/claude-md"><img src="https://agentmods.dev/badge/instructions/tao2years/llm_router/claude-md.svg" alt="Measured on agentmods" 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 | $0.01424 | $0.01424 |
| Opus 5 | $0.00712 | $0.00712 |
| Sonnet 5 | $0.00285 | $0.00285 |
| Haiku 4.5 | $0.00142 | $0.00142 |
Grade A, and why
llm_router 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 8d 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 — 140 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
LLM Router Trace Viewer — a transparent Claude Code wrapper plus debugging proxy. The ccrt CLI launches Claude Code with the original arguments, routes LLM traffic through the local trace proxy, stores traces in SQLite, and visualizes them in a real-time Next.js UI.
Monorepo Structure
Two packages with separate package.json and tsconfig.json:
proxy/— Express.js proxy server (Node.js, CommonJS, TypeScript →dist/)web/— Next.js 15 + React 19 trace viewer (browser/ESM TypeScript)
Configuration
The proxy requires the LLM_UPSTREAM_URL environment variable (base URL of the upstream LLM API, no trailing slash required). Anthropic traffic is sent to {UPSTREAM_URL}/v1/messages; OpenAI-style traffic to {UPSTREAM_URL}/v1/chat/completions. Request headers from the agent (including auth) are forwarded except hop-by-hop fields (host, content-length, connection).
Example:
set LLM_UPSTREAM_URL=https://api.example.com
Commands
Setup
npm run install:all # Install deps in both proxy/ and web/
Primary wrapper flow
npm run ccrt -- -p "say hello to me"
After npm link, users can run:
ccrt --dangerously-skip-permissions
ccrt -p "say hello to me"
ccrt starts the proxy/API/web services if needed, then passes all arguments through to claude. It sets Claude Code API/proxy environment variables for the child process instead of requiring users to change their persistent Claude config.
Development
npm run dev # Run both proxy + web concurrently (recommended)
npm run dev:proxy # Proxy only (ts-node-dev, hot reload)
npm run dev:web # Web UI only (Next.js, port 3000)
npm run build # Build proxy + web
Per-package (proxy / web)
cd proxy && npm run dev # ts-node-dev with hot reload
cd proxy && npm run build && npm start
cd web && npm run dev # Next.js dev on :3000
cd web && npm run build && npm start
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.
- 8d ago First seen · 140 lines · 1,424 tokens per session scan A acbc63dd0ef0
llm_router CLAUDE.md is an instructions file published in the GitHub repository tao2years/llm_router (5 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 1,424 tokens to every session, about $0.0071 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.
Other instructions, from other repositories
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AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
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Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, applying the notice (cutover) and fallback chain (never fail the build).
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.
spec-kit AGENTS.md
AGENTS.md instructions for github/spec-kit, covering agents.md, about spec kit and specify, quickstart — add a new integration in 5 steps, integration architecture and integrationmanifest — file tracking.