Borrowing it
Nothing to install: this file belongs to oddrationale/groupme-mcp-server. 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/oddrationale/groupme-mcp-server/main/AGENTS.mdgit clone --depth 1 https://github.com/oddrationale/groupme-mcp-serverWrote 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/oddrationale/groupme-mcp-server/agents-md)<a href="https://agentmods.dev/instructions/oddrationale/groupme-mcp-server/agents-md"><img src="https://agentmods.dev/badge/instructions/oddrationale/groupme-mcp-server/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/oddrationale/groupme-mcp-server/agents-md"><img src="https://agentmods.dev/badge/instructions/oddrationale/groupme-mcp-server/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 | $0.02645 | $0.02645 |
| Opus 5.5 | $0.01058 | $0.01058 |
| Sonnet 5.5 | $0.00529 | $0.00529 |
| Haiku 4.5 | $0.00265 | $0.00265 |
Grade A, and why
groupme-mcp-server 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 3d 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 — 234 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md
Instructions for AI coding agents (Claude Code, Copilot, Cursor, …) working in this repository. Humans: see CONTRIBUTING.md.
What this is
groupme-mcp-server is a FastMCP server exposing the
GroupMe API v3 over MCP. It is deployed to
Prefect Horizon.
Current state: read, agentic, and write tools implemented
(list_conversations, read_messages, get_conversation_context,
search_messages, get_highlights, send_message, react_to_message);
image upload (arbitrary-URL images) is not yet.
Toolchain — use these, not the alternatives
| Concern | Tool | Do not use |
|---|---|---|
| Packaging | uv (src layout) |
pip, poetry, pdm, hatch |
| Lint + format | ruff |
black, flake8, isort, pylint |
| Type check | ty |
mypy, pyright |
| Tests | pytest + pytest-cov |
unittest, nose |
| Git hooks | lefthook |
pre-commit |
Every command runs through uv: uv run <cmd>, uv add <pkg>,
uv add --dev <pkg>. Never call pip or edit uv.lock by hand.
Exception: on Windows ARM64 the lefthook PyPI wrapper cannot find its binary
(upstream arch-detection bug), so lefthook is installed natively via scoop and
invoked as bare lefthook, not uv run lefthook.
Before you claim you are done
uv run ruff format . && uv run ruff check . && uv run ty check && uv run pytest
All four must pass. There is no partial credit.
Integration tests
tests/integration/ holds tests marked integration that talk to real
services: read-only smoke tests against api.groupme.com, auth checks
against the deployed server at https://groupme.fastmcp.app/mcp, and a
stdio end-to-end test that spawns uv run groupme-mcp-server as a
subprocess. They are deselected by default (-m "not integration" in
addopts), so the ordinary gate, CI, and the 100% coverage requirement
never touch them. Run them with:
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.
- 3d ago Changed · +9 lines · +161 tokens per session 55e4d90c2a87
- 2mo ago First seen · 225 lines · 2,484 tokens per session scan A fde96fe9a459
groupme-mcp-server AGENTS.md is an instructions file published in the GitHub repository oddrationale/groupme-mcp-server (0 stars, last pushed 4d ago), licensed MIT. It adds 2,645 tokens to every session, about $0.0106 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.
groupme-mcp-server AGENTS.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| groupme-mcp-server AGENTS.mdoddrationale/groupme-mcp-server | Instructions file | 0 | 4d ago | MIT | A | 2,645 | 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 |