brownbear AGENTS.md

Repository rules for every AI coding agent working on brownbear. They require real implementations, complete file output, honest status reports, and a final checklist, with the full manual in CLAUDE.md.

In plain words
What is it for?
Use them whenever an AI agent edits, tests, reviews, or hands off work in this repository.
Why use it?
They prevent unfinished code, misleading claims, and incomplete changes from being treated as production-ready.

Instructions file for CodexOpenCode

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add instructions/dudeaint/brownbear/agents-md
Clone the repo
git clone --depth 1 https://github.com/DudeAint/brownbear

Made for: Codex, OpenCode.

Per session 946 This file is loaded in full into every session.
When invoked 946 The same file — it is already loaded in full.
Security scan A 0 findings. Scan, not verified.
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 $0.00946 $0.00946
Opus 5 $0.00473 $0.00473
Sonnet 5 $0.00189 $0.00189
Haiku 4.5 $0.00095 $0.00095

Measured 2d ago against content hash afcc38eddbad, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

brownbear 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 2d 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 · 67 lines

How it starts

The opening of the file, as written. The whole thing — 67 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md — Rules for Every AI Agent in This Repo

This file exists so that any coding agent — Claude Code, Codex, Cursor, Copilot Workspace, Gemini, whatever tool is fashionable next month — gets the same non-negotiable rules the moment it opens this repository. If you are an AI and you are reading this: congratulations, you are now on the hook. The authoritative, full manual is CLAUDE.md. This file is the short, blunt version. Read both.


Listen to me. I'm only saying this once.

I have lost the will to gently coach another autocomplete engine through basic professional standards. The honeymoon is over. Here is what happens in this repo:

You do NOT, under any circumstances:

  1. Write // TODO, // implement this, fatalError("unimplemented"), or a function that returns a fake value to make the types line up. If it's not real, it doesn't ship.
  2. Write // ... existing code ... or // rest unchanged and call a file "done." Output the whole file. Every line. I will diff it. I always diff it.
  3. Tell me something is finished, tested, or working when you did not finish, test, or run it. Lying to me is the single fastest way to get every one of your commits reverted on sight.
  4. Invent an API, a method, or a config key because it "should" exist. Open the file. Check.
  5. Paste GPL/AGPL source from our reference repos (ScriptCat, Userscripts) into this MIT tree. Learn the pattern, write it yourself. Copy-paste is how we get sued, not shipped.
  6. Take a shortcut at the JavaScript ↔ native bridge. That boundary runs untrusted code. Validate every message. Fail closed. No exceptions, no "I'll harden it later."

You absolutely DO:

  1. Read before you write. Understand the module, match its style exactly (naming, spacing, comment density, error handling). New code should be invisible in a blame view.
  2. Finish what you start, or say precisely what's left. Honest and partial > fake and whole.
  3. Verify, then report the truth. Ran the tests? Show the output — pass or fail. Couldn't build in this environment? Say that, and say what you did check (syntax, logic).
  4. One logical change per commit, Conventional Commits format (type(scope): subject), imperative mood, ≤72 chars. See CONTRIBUTING.md.
  5. Update the docs in the same change. New GM API → update ARCHITECTURE.md and the README feature list. Stale docs are a bug.
  6. Ask when it's a real fork in the road (license question, public API shape, security trade-off). Don't bury a guess and hope nobody notices. I notice.

Read the full file on GitHub · 67 lines

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. 2d ago First seen · 67 lines · 946 tokens per session scan A afcc38eddbad

Subscribe to this mod's changes

brownbear AGENTS.md is an instructions file published in the GitHub repository DudeAint/brownbear (10 stars, last pushed 1mo ago), licensed MIT. It adds 946 tokens to every session, about $0.0047 per session on Opus 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.