hack: Instructions file for Codex

AGENTS.md

hack AGENTS.md is an instructions file for Codex, OpenCode from hack-dance/hack. It costs 1,155 tokens per session, scanned A, original, MIT.

A set of instructions for developing the hack project with the Bun JavaScript runtime and its preferred tools.

In plain words
What is it for?
Use it when building APIs, writing TypeScript, running tests, managing packages, or following the project's commit and release rules.
Why use it?
It prevents contributors from using unsupported alternatives and defines the project's testing, coding-style, and release expectations.

Instructions file for CodexOpenCode

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

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

Reuse

Borrowing it

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

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 hack AGENTS.md

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

Your own site · 80×15
<a href="https://agentmods.dev/instructions/hack-dance/hack/agents-md"><img src="https://agentmods.dev/badge/instructions/hack-dance/hack/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 1,155 This file is loaded in full into every session.
When invoked 1,155 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 $0.01155 $0.01155
Opus 5.5 $0.00462 $0.00462
Sonnet 5.5 $0.00231 $0.00231
Haiku 4.5 $0.00115 $0.00115

Measured 3d ago against content hash 176863e4d99f, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

hack 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

AGENTS.md · 92 lines

How it starts

The opening of the file, as written. The whole thing — 92 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Contributing to Hack

Scope and authority

Hack's supported product is the local-first CLI: project setup, container runtime, routing/TLS, environment management, host commands, lifecycle processes, sessions, diagnostics, daemon, and optional agent integrations.

Hosted account/auth/team flows, the web dashboard, Hack Tickets, and built-in GitHub/Linear integrations are retired. Remote/gateway/node/dispatch and the retained macOS app are unsupported; work on them only when explicitly requested. Do not add them to onboarding, default workflows, or core release requirements.

Preserve existing user changes. Infer routine details from the request and code; ask only when a gap blocks correctness or authority. Existing authorization covers the same action and scope. Honor read-only requests and native credential approvals. Publishing, production changes, destructive operations, and broader configuration changes still need authorization for their actual scope. Never bypass a protected branch or publishing gate merely to finish a task.

Source and conventions

  • src/, index.ts, packages/cli/: CLI and runtime code.
  • src/agents/instruction-source.ts: canonical consumer guidance. Onboarding prompts live in src/agents/onboarding-prompt.ts; client renderers own framing only.
  • plugins/hack/: generated optional plugin bundle. docs/ contains product docs.
  • packages/db/ and services/: retained internal code; not default hosted dependencies.
  • For explicitly requested native work, read apps/macos/AGENTS.md.

Use the Bun version pinned in package.json, and bun install --frozen-lockfile. Use strict TypeScript, named option objects where they improve call clarity, and unknown plus narrowing for untrusted values. Follow the repository's Biome/Ultracite configuration rather than maintaining a second formatting specification here. Prefer existing patterns and Bun APIs; do not migrate unrelated dependencies. Keep src/commands/project.ts and src/commands/global.ts small: extract decision logic into focused helpers with meaningful tests when complexity grows.

Read the full file on GitHub · 92 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. 3d ago Changed · +6 lines · +103 tokens per session 176863e4d99f
  2. 1mo ago Changed · -310 lines · -5,012 tokens per session bee77bf26fa5
  3. 2mo ago Changed · +1 lines · +31 tokens per session e1e2c6fcb31f
  4. 2mo ago First seen · 395 lines · 6,033 tokens per session scan A 734b6f02bc5a

Subscribe to this mod's changes

hack AGENTS.md is an instructions file published in the GitHub repository hack-dance/hack (9 stars, last pushed today), licensed MIT. It adds 1,155 tokens to every session, about $0.0046 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

hack AGENTS.md compared with instructions from other repositories

hack AGENTS.md next to 6 instructions from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
hack AGENTS.mdhack-dance/hackInstructions file9todayMITA1,155Codex, 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