biff: Instructions file for Codex

AGENTS.md

biff AGENTS.md is an instructions file for Codex, OpenCode from punt-labs/biff. It costs 613 tokens per session, scanned A, a copy of awesome-spain AGENTS.md, MIT.

A set of instructions for biff, a project that tracks work with command-line issues called beads. It describes how to find, claim, complete, check, publish, and hand over work.

In plain words
What is it for?
Use it when taking on an issue, implementing or reviewing a change, running quality checks, closing work items, or preparing a handoff.
Why use it?
It makes the project's completion process explicit, including required checks and pushing changes to the remote repository. This prevents finished work from being left untracked or unpublished.

Instructions file for CodexOpenCode

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

This is punt-labs/biff's own configuration. It tells Codex and OpenCode how to work on biff 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 biff configures →

Reuse

Borrowing it

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

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 biff AGENTS.md

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

Your own site · 80×15
<a href="https://agentmods.dev/instructions/punt-labs/biff/agents-md"><img src="https://agentmods.dev/badge/instructions/punt-labs/biff/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 613 This file is loaded in full into every session.
When invoked 613 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 50% copy Near-identical to another mod 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 $0.00613 $0.00613
Opus 5.5 $0.00245 $0.00245
Sonnet 5.5 $0.00123 $0.00123
Haiku 4.5 $0.00061 $0.00061

Measured 11d ago against content hash 0682e047cf14, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

biff 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 11d 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.

Origin

This is a copy

50% identical to awesome-spain AGENTS.md — 114 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

AGENTS.md · 68 lines

How it starts

The opening of the file, as written. The whole thing — 68 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Agent Instructions

This project uses bd (beads) for issue tracking. Run bd onboard to get started.

Quick Reference

bd ready --limit=99   # Find available work (show all)
bd show <id>          # View issue details
bd update <id> --status in_progress  # Claim work
bd close <id>         # Complete work

Workflow

This repo delegates non-trivial work through ethos missions, not a tiered slash-command system — see "Workflow: Ethos Missions and Pipelines" in CLAUDE.md for mission archetypes (implement, design, test, review, report, task) and pipeline selection (quick, standard, full, product, formal, docs, coe, coverage).

Session Close Protocol

Follow the protocol in CLAUDE.md. The short version:

  1. File issues for remaining work (bd create)

  2. Quality gates must pass (make check)

  3. Close beads for finished work (bd close <id>)

  4. Push to remote — work is NOT complete until git push succeeds:

    git pull --rebase
    git push
    git status  # MUST show "up to date with origin"
    
  5. Hand off — provide context for next session

PR workflow (see CLAUDE.md): Do NOT merge a PR immediately. PR review follows punt-kit/standards/pr-review.md: local review before the PR, then Qodo and Bugbot once at open, at most two rounds, Copilot only on request. Address valid findings, ensure quality gates pass, then merge.

Landing the Plane (Session Completion)

When ending a work session, you MUST complete ALL steps below. Work is NOT complete until git push succeeds.

MANDATORY WORKFLOW:

  1. File issues for remaining work - Create issues for anything that needs follow-up

  2. Run quality gates (if code changed) - Tests, linters, builds

  3. Update issue status - Close finished work, update in-progress items

  4. PUSH TO REMOTE - This is MANDATORY:

    git pull --rebase
    git push
    git status  # MUST show "up to date with origin"
    
  5. Clean up - Clear stashes, prune remote branches

  6. Verify - All changes committed AND pushed

  7. Hand off - Provide context for next session

Read the full file on GitHub · 68 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. 11d ago Changed · +25 tokens per session 0682e047cf14
  2. 2mo ago First seen · 68 lines · 588 tokens per session scan A df73bdb20c1c

Subscribe to this mod's changes

biff AGENTS.md is an instructions file published in the GitHub repository punt-labs/biff (2 stars, last pushed today), licensed MIT. It adds 613 tokens to every session, about $0.0025 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 50% identical to awesome-spain AGENTS.md, differing in 114 lines, and is treated as a copy.

Related

biff AGENTS.md compared with instructions from other repositories

biff AGENTS.md next to 6 instructions from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
biff AGENTS.mdpunt-labs/biffInstructions file2todayMITA613Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscodeInstructions file195kyesterdayMITA9,719GitHub Copilot
next.js AGENTS.mdvercel/next.jsInstructions file143kyesterdayMITA7,461Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchainInstructions file149kyesterdayMITA4,680Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscodeInstructions file195kyesterdayMITA5,516GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscodeInstructions file195kyesterdayMITA3,093GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harnessInstructions file274k2d agoMITA4,313Codex, OpenCode