Borrowing it
Nothing to install: this file belongs to Array-Ventures/coworker. 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/Array-Ventures/coworker/master/AGENTS.mdgit clone --depth 1 https://github.com/Array-Ventures/coworkerWrote 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/array-ventures/coworker/agents-md)<a href="https://agentmods.dev/instructions/array-ventures/coworker/agents-md"><img src="https://agentmods.dev/badge/instructions/array-ventures/coworker/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/array-ventures/coworker/agents-md"><img src="https://agentmods.dev/badge/instructions/array-ventures/coworker/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 | $0.00758 | $0.00758 |
| Opus 5.5 | $0.00303 | $0.00303 |
| Sonnet 5.5 | $0.00152 | $0.00152 |
| Haiku 4.5 | $0.00076 | $0.00076 |
Grade A, and why
coworker 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 — 89 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md
This document provides guidance for AI coding agents working in this repository.
CRITICAL: Mastra Skill Required
BEFORE doing ANYTHING with Mastra code or answering Mastra questions, load the Mastra skill FIRST.
See Mastra Skills section for loading instructions.
Project Overview
This is a Mastra project written in TypeScript. Mastra is a framework for building AI-powered applications and agents with a modern TypeScript stack.
Commands
Use these commands to interact with the project.
Installation
npm install
Development
Start the Mastra Studio at localhost:4111 by running the dev script:
npm run dev
Build
In order to build a production-ready server, run the build script:
npm run build
Project Structure
Folders organize your agent's resources, like agents, tools, and workflows.
| Folder | Description |
|---|---|
src/mastra |
Entry point for all Mastra-related code and configuration. |
src/mastra/agents |
Define and configure your agents - their behavior, goals, and tools. |
src/mastra/workflows |
Define multi-step workflows that orchestrate agents and tools together. |
src/mastra/tools |
Create reusable tools that your agents can call |
src/mastra/mcp |
(Optional) Implement custom MCP servers to share your tools with external agents |
src/mastra/scorers |
(Optional) Define scorers for evaluating agent performance over time |
src/mastra/public |
(Optional) Contents are copied into the .build/output directory during the build process, making them available for serving at runtime |
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 · 89 lines · 758 tokens per session scan A 8c780183c02d
coworker AGENTS.md is an instructions file published in the GitHub repository Array-Ventures/coworker (44 stars, last pushed 8mo ago), licensed Apache-2.0. It adds 758 tokens to every session, about $0.0030 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.
coworker AGENTS.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| coworker AGENTS.mdArray-Ventures/coworker | Instructions file | 44 | 8mo ago | Apache-2.0 | A | 758 | Codex, OpenCode |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 9,719 | GitHub Copilot |
| next.js AGENTS.mdvercel/next.js | Instructions file | 143k | yesterday | 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 |
| deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness | Instructions file | 274k | 2d ago | MIT | A | 4,313 | Codex, OpenCode |