agentsmd: Instructions file for Codex

AGENTS.md

agentsmd AGENTS.md is an instructions file for Codex, OpenCode from daichunghy/agentsmd. It costs 258 tokens per session, scanned A, original, MIT.

Repository instructions for developing an agents.md project, including its Node.js setup, build commands, tests, and coding conventions. An agents.md file gives coding agents rules for working in a project.

In plain words
What is it for?
Installing dependencies, building the project and GitHub Action, running the full verification gate, and following its TypeScript and commit rules.
Why use it?
They define the checks and conventions needed for reliable, repeatable changes, including deterministic output that does not vary between runs.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md. Also seen: mentions AGENTS.md.

This is daichunghy/agentsmd's own configuration. It tells Codex and OpenCode how to work on agentsmd itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything agentsmd configures →

Reuse

Borrowing it

Nothing to install: this file belongs to daichunghy/agentsmd. 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/daichunghy/agentsmd/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/daichunghy/agentsmd

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.

agentmods badge for agentsmd AGENTS.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/daichunghy/agentsmd/agents-md/github.svg)](https://agentmods.dev/instructions/daichunghy/agentsmd/agents-md)
Your own site
<a href="https://agentmods.dev/instructions/daichunghy/agentsmd/agents-md"><img src="https://agentmods.dev/badge/instructions/daichunghy/agentsmd/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.

agentmods 80×15 button for agentsmd AGENTS.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/daichunghy/agentsmd/agents-md"><img src="https://agentmods.dev/badge/instructions/daichunghy/agentsmd/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 258 This file is loaded in full into every session.
When invoked 258 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00258 $0.00258
Opus 5.5 $0.00103 $0.00103
Sonnet 5.5 $0.00052 $0.00052
Haiku 4.5 $0.00026 $0.00026

Measured 2mo ago against content hash b8aa82a3e482, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

agentsmd 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 · 29 lines

What it actually says

AGENTS.md

Setup

Run npm install once; Node >= 18.

Build

npm run build compiles src/ to dist/. npm run build:action bundles the GitHub Action entry to action-dist/index.js (committed).

Test

npm run verify is the full gate: typecheck, build, action bundle, tests (including golden fixtures, determinism, text/JSON parity, and process tests). Run it before considering any change complete.

Conventions

  • TypeScript strict mode; no any in src/.
  • The CLI keeps zero runtime dependencies; Action-only dependencies are inlined into action-dist at build time.
  • Core logic is pure over the injected FileReader; tests use MemFs fixture trees from fixtures/.
  • Lint/score output must stay deterministic: no timestamps, no absolute paths, canonical JSON with sorted keys.
  • Conventional commits (feat:, fix:, test:, chore:, docs:).
  • Design authority: docs/superpowers/specs/2026-08-22-agentsmd-mvp-design.md.
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.

  1. 2mo ago First seen · 29 lines · 258 tokens per session scan A b8aa82a3e482

Subscribe to this mod's changes

agentsmd AGENTS.md is an instructions file published in the GitHub repository daichunghy/agentsmd (1 stars, last pushed 13d ago), licensed MIT. It adds 258 tokens to every session, about $0.0010 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.

Related

agentsmd AGENTS.md compared with instructions from other repositories

agentsmd AGENTS.md next to 6 instructions from other repositories
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agentsmd AGENTS.mddaichunghy/agentsmdInstructions file113d agoMITA258Codex, OpenCode
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next.js AGENTS.mdvercel/next.jsInstructions file143kyesterdayMITA7,461Codex, OpenCode
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vscode copilot-instructions.mdmicrosoft/vscodeInstructions file195kyesterdayMITA3,093GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harnessInstructions file274k2d agoMITA4,313Codex, OpenCode