What is hac-mcp AGENTS.md?

A project instruction file for hac-mcp, a safety-focused administrative MCP server for Home Assistant, a tool for controlling smart-home devices.

It is for guiding development of hac-mcp, including use of its development container and running supply-chain checks, audits, type checks, linting, formatting checks, tests, and builds.

It records development rules and checks so contributors know how to prepare and validate changes before publishing.

How lemanjo/hac-mcp configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to lemanjo/hac-mcp. 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/lemanjo/hac-mcp/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/lemanjo/hac-mcp

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

Your own site

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

Per session 127 This file is loaded in full into every session.

When invoked 127 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	$0.00127	$0.00127
Opus 5.5	$0.00051	$0.00051
Sonnet 5.5	$0.00025	$0.00025
Haiku 4.5	$0.00013	$0.00013

Measured 2mo ago against content hash 0f41c54797dd, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

hac-mcp 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 · 6 lines

What it actually says

Development Environment

Use .devcontainer/devcontainer.json for development; it builds a Node 22 Debian Bookworm image with pnpm 11.21.0, OpenCode 1.18.18, and GitHub CLI 2.97.0, then connects as the non-root node user.
The devcontainer does not add a Docker feature or mount the host Docker socket; do not assume Docker daemon access inside it.
Use the scripts declared in package.json; run the supply-chain check, audit, typecheck, lint, format check, tests, and build before publishing changes.

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 · 6 lines · 127 tokens per session scan A 0f41c54797dd

Subscribe to this mod's changes

hac-mcp AGENTS.md is an instructions file published in the GitHub repository lemanjo/hac-mcp (0 stars, last pushed 2mo ago), licensed MIT. It adds 127 tokens to every session, about $0.0005 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.

Hardware and IoT docker home-assistant mcp model-context-protocol

hac-mcp AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
hac-mcp AGENTS.mdlemanjo/hac-mcp	Instructions file	0	2mo ago	MIT	A	127	Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	today	MIT	A	7,461	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	5,685	GitHub Copilot
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	yesterday	MIT	A	4,680	Codex, OpenCode
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	3,093	GitHub Copilot
vscode model-prompts.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	2,022	GitHub Copilot

hac-mcp: Instructions file for Codex