Borrowing it
Nothing to install: this file belongs to langgenius/mosoo. 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/langgenius/mosoo/main/AGENTS.mdgit clone --depth 1 https://github.com/langgenius/mosooWrote 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/langgenius/mosoo/agents-md)<a href="https://agentmods.dev/instructions/langgenius/mosoo/agents-md"><img src="https://agentmods.dev/badge/instructions/langgenius/mosoo/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/langgenius/mosoo/agents-md"><img src="https://agentmods.dev/badge/instructions/langgenius/mosoo/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 | $0.00133 | $0.00133 |
| Opus 5.5 | $0.00053 | $0.00053 |
| Sonnet 5.5 | $0.00027 | $0.00027 |
| Haiku 4.5 | $0.00013 | $0.00013 |
Grade A, and why
mosoo 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 28d 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.
What it actually says
AGENTS.md
- Follow
CONTRIBUTING.mdfor setup, development, verification, generated files, Git/PR, migrations, and deployment. - For product behavior or module-boundary changes, read only the relevant sections of
docs/SPEC.md,docs/architecture.md, and the matchingdocs/prdnote before editing. - Production D1 is append-only: never reset production or rewrite an applied migration; follow
CONTRIBUTING.md#database-and-migrationsanddocs/production-deploy-verification.md. - Destructive or data-rewrite migrations require explicit user approval plus a backup and rollback plan.
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.
- 28d ago Changed · +18 tokens per session 2868f28c1530
- 2mo ago First seen · 7 lines · 115 tokens per session scan A e4061c6cd251
mosoo AGENTS.md is an instructions file published in the GitHub repository langgenius/mosoo (166 stars, last pushed yesterday), licensed Apache-2.0. It adds 133 tokens to every session, about $0.0005 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.
mosoo AGENTS.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| mosoo AGENTS.mdlanggenius/mosoo | Instructions file | 166 | yesterday | Apache-2.0 | A | 133 | Codex, OpenCode |
| runtm copilot-instructions.mdruntm-ai/runtm | Instructions file | 303 | yesterday | none | A | 297 | GitHub Copilot |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 9,719 | GitHub Copilot |
| next.js AGENTS.mdvercel/next.js | Instructions file | 143k | today | MIT | A | 7,461 | Codex, OpenCode |
| langchain AGENTS.mdlangchain-ai/langchain | Instructions file | 149k | yesterday | MIT | A | 4,680 | Codex, OpenCode |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 5,516 | GitHub Copilot |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 3,093 | GitHub Copilot |