What is mcp-coco AGENTS.md?

A set of working instructions for a small Python project containing a FastAPI web server, an MCP server, and a code indexer. FastAPI is a Python framework for building web APIs, while an MCP server connects agents to tools or data.

Use it to find the project’s main code and database setup, then run its pytest tests and Ruff code checks after relevant changes.

It gives contributors consistent rules for making small changes and checking that they work.

How datarian/mcp-coco configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to datarian/mcp-coco. 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/datarian/mcp-coco/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/datarian/mcp-coco

Made for: Codex, OpenCode.

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/datarian/mcp-coco/agents-md/github.svg)](https://agentmods.dev/instructions/datarian/mcp-coco/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/datarian/mcp-coco/agents-md"><img src="https://agentmods.dev/badge/instructions/datarian/mcp-coco/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/datarian/mcp-coco/agents-md"><img src="https://agentmods.dev/badge/instructions/datarian/mcp-coco/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 166 This file is loaded in full into every session.

When invoked 166 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	$0.00166	$0.00166
Opus 5.5	$0.00066	$0.00066
Sonnet 5.5	$0.00033	$0.00033
Haiku 4.5	$0.00017	$0.00017

Measured 2mo ago against content hash d74eae82bebf, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

mcp-coco 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 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.

AGENTS.md · 23 lines

What it actually says

Agent Guide

This repo is a small Python workspace for a FastAPI/MCP server and a CocoIndex-based indexer.

Working rules

Make the smallest change that fixes the request.
Prefer local, targeted edits over broad refactors.
Check README.md first for setup and runtime context.
Keep code style aligned with the existing files in src/, scripts/, and tests/.

Validation

Run uv run pytest for behavior changes.
Run uv run ruff check . for lint-sensitive changes.
If you touch database setup or server wiring, verify the affected path directly.

Main entry points

src/ for application code.
tests/ for pytest coverage.
scripts/init_db.py for database initialization.

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 · 23 lines · 166 tokens per session scan A d74eae82bebf

Subscribe to this mod's changes

mcp-coco AGENTS.md is an instructions file published in the GitHub repository datarian/mcp-coco (1 stars, last pushed 4mo ago), licensed MIT. It adds 166 tokens to every session, about $0.0007 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.

mcp-coco AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
mcp-coco AGENTS.mddatarian/mcp-coco	Instructions file	1	4mo ago	MIT	A	166	Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	yesterday	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	yesterday	MIT	A	4,680	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	274k	2d ago	MIT	A	4,313	Codex, OpenCode

mcp-coco: Instructions file for Codex