Borrowing it
Nothing to install: this file belongs to cipherfoxie/agent-bench. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/cipherfoxie/agent-bench/main/AGENTS.mdgit clone --depth 1 https://github.com/cipherfoxie/agent-benchWrote 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.
[](https://agentmods.dev/instructions/cipherfoxie/agent-bench/agents-md)<a href="https://agentmods.dev/instructions/cipherfoxie/agent-bench/agents-md"><img src="https://agentmods.dev/badge/instructions/cipherfoxie/agent-bench/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.
<a href="https://agentmods.dev/instructions/cipherfoxie/agent-bench/agents-md"><img src="https://agentmods.dev/badge/instructions/cipherfoxie/agent-bench/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00784 | $0.00784 |
| Opus 5.5 | $0.00314 | $0.00314 |
| Sonnet 5.5 | $0.00157 | $0.00157 |
| Haiku 4.5 | $0.00078 | $0.00078 |
Grade A, and why
agent-bench 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.
How it starts
The opening of the file, as written. The whole thing — 37 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS, Multi-Agent Contract for agent-bench
This file is the contract any AI agent (Claude, Qwen, Mistral, opencode, Continue, Zed-agent) must read before editing this repo.
Project ethos
agent-bench exists to replace vibes with numbers. Honesty beats advocacy. A negative result is a successful benchmark. Never massage, drop, or footnote inconvenient data; if a run is contaminated, the whole cell is rerun, not patched.
Rules
-
Deterministic gates only. No LLM-judged success criteria, anywhere. If a new task cannot be gated by a build, a typecheck, a grep, or a frozen checklist, redesign the task.
-
One variable per arm. An experiment arm toggles exactly one thing. If a change needs two toggles, it is two experiments.
-
Raw data is sacred. Every published number must be recomputable from
results/*.jsonl. Never edit a runs file by hand. Contaminated runs get a clean rerun under a new experiment name; the old file is deleted, not doctored. -
Node ESM, stdlib-first. The runner is dependency-free Node 22 (
node:imports only). Gate scripts are POSIX bash. Do not add frameworks for what a function can do. -
No em-dashes (U+2014) in any user-facing string or article. Use comma, period, colon, or parens.
-
No "Generated with Claude Code" / "Co-Authored-By: Claude" trailers in commits intended for GitHub.
-
No operator-identity or host internals in tracked files: no real names, no private hostnames, no internal absolute paths, no internal IPs. Host specifics go through env vars (
MODELS,SWITCH_CMD) or gitignored local config. This includes deny-list regexes: a public CI step that greps for the secret strings is the leak. Identity checks live in the private publishing pipeline only; public CI gets generic patterns (any IP, any email) at most. -
Two opencode footguns, never reintroduce:
opencode runneedsstdin: 'ignore'(blocks forever on open stdin); per-arm isolation goes throughOPENCODE_CONFIG, and prompt injection throughAGENTS.mdin the workdir (projectopencode.jsoninstructionsis silently ignored).
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 · 37 lines · 784 tokens per session scan A 3f8e86698f37
agent-bench AGENTS.md is an instructions file published in the GitHub repository cipherfoxie/agent-bench (2 stars, last pushed 4mo ago), licensed MIT. It adds 784 tokens to every session, about $0.0031 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.
Other instructions, from other repositories
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
deno copilot-instructions.md
Copilot instructions for denoland/deno, covering deno development guide for github copilot, network access, high level overview, key directories and key files to understand first.