Borrowing it
Nothing to install: this file belongs to akhayam99/goodboy. 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/akhayam99/goodboy/main/AGENTS.mdgit clone --depth 1 https://github.com/akhayam99/goodboyWrote 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/akhayam99/goodboy/agents-md)<a href="https://agentmods.dev/instructions/akhayam99/goodboy/agents-md"><img src="https://agentmods.dev/badge/instructions/akhayam99/goodboy/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/akhayam99/goodboy/agents-md"><img src="https://agentmods.dev/badge/instructions/akhayam99/goodboy/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 | $0.03372 | $0.03372 |
| Opus 5.5 | $0.01349 | $0.01349 |
| Sonnet 5.5 | $0.00674 | $0.00674 |
| Haiku 4.5 | $0.00337 | $0.00337 |
Grade A, and why
goodboy 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 yesterday.
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.
The source is not reproduced here
A licence we could not identify
The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.
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.
- yesterday Changed · +16 lines · +429 tokens per session f3e5fc5b34e5
- 2d ago Changed · +1 lines · +23 tokens per session aa02eafc6554
- 16d ago Changed · +2 lines · +54 tokens per session d2cfcdf15ed4
- 17d ago Changed · +43 lines · +884 tokens per session d12a8056dae7
- 25d ago Changed · +4 lines · +130 tokens per session ee9bcb9a36b1
- 27d ago Changed · +2 lines · +47 tokens per session 79039a652b56
- 29d ago Changed · +2 lines · +42 tokens per session d1ae852a1f62
- 1mo ago Changed · +4 lines · +82 tokens per session 16ad74731e30
- 1mo ago Changed · +2 lines · +35 tokens per session d209b2d9670b
- 1mo ago First seen · 138 lines · 1,646 tokens per session scan A bea402aecc47
goodboy AGENTS.md is an instructions file published in the GitHub repository akhayam99/goodboy (118 stars, last pushed today), with no licence file. It adds 3,372 tokens to every session, about $0.0135 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 2026-08-30.
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).
vscode model-prompts.instructions.md
Model-specific prompt authoring and registry guidelines.