Borrowing it
Nothing to install: this file belongs to ameshkov/mcp-compress-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/ameshkov/mcp-compress-router/master/AGENTS.mdgit clone --depth 1 https://github.com/ameshkov/mcp-compress-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/ameshkov/mcp-compress-router/agents-md)<a href="https://agentmods.dev/instructions/ameshkov/mcp-compress-router/agents-md"><img src="https://agentmods.dev/badge/instructions/ameshkov/mcp-compress-router/agents-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/ameshkov/mcp-compress-router/agents-md"><img src="https://agentmods.dev/badge/instructions/ameshkov/mcp-compress-router/agents-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 | $0.06799 | $0.06799 |
| Opus 5.5 | $0.02720 | $0.02720 |
| Sonnet 5.5 | $0.01360 | $0.01360 |
| Haiku 4.5 | $0.00680 | $0.00680 |
Grade A, and why
mcp-compress-router AGENTS.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 19d 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 — 559 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md
MCP Compress Router — a single-router MCP server that compresses all
connected MCP servers into one, with just two tools: get_tool_schema and
invoke_tool. Saves up to 99% on token overhead by replacing verbose
tool listings with a compact routing layer.
Table of Contents
- Project Overview
- Technical Context
- Project Structure
- Build and Test Commands
- Contribution Instructions
- Code Guidelines
Project Overview
A single MCP (Model Context Protocol) server that acts as a router. Instead of sending all tool names and descriptions from every connected MCP to the LLM on every request, this server exposes only two tools:
get_tool_schema— returns the JSON parameter schema for one or more tools on a connected MCP server, or lists a server's tools and their argument signatures when called without tool names.invoke_tool— forwards a tool invocation to a connected MCP server and returns the result.
The LLM first calls get_tool_schema to learn the parameters, then calls
invoke_tool to execute. This reduces token overhead by ~96% for a typical
coding session with 3 MCP servers.
Technical Context
| Field | Value |
|---|---|
| Language | TypeScript 5.9, ES2022 target, strict mode |
| Runtime | Node.js 24+ |
| Package Manager | pnpm 10+ |
| Framework | MCP SDK (@modelcontextprotocol/sdk) |
| Linting | oxlint (category-based config) + Knip |
| Formatting | Prettier 3.x, Markdownlint (markdownlint-cli2) |
| Project Type | MCP server (stdio transport) |
Project Structure
The repo is organized as a small set of modules, each owning one concern:
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.
- 19d ago Changed · +14 lines · +207 tokens per session ff7ebb7d3ec9
- 25d ago Changed · +33 lines · +470 tokens per session 0238dbae7a5b
- 26d ago Changed · +8 lines · +113 tokens per session 99587c5cb55f
- 1mo ago Changed · +30 lines · +233 tokens per session 25fda84a75a6
- 1mo ago Changed · +1 lines · +8 tokens per session 27ff41044a5f
- 1mo ago Changed · +29 lines · +757 tokens per session 22a5325e2240
- 1mo ago Changed · -19 lines · -519 tokens per session dffb6c830a92
- 2mo ago First seen · 463 lines · 5,530 tokens per session scan A ecfa2a71589d
mcp-compress-router AGENTS.md is an instructions file published in the GitHub repository ameshkov/mcp-compress-router (21 stars, last pushed 20d ago), licensed MIT. It adds 6,799 tokens to every session, about $0.0272 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.
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