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AGENTS.md · MetaMask/metamask-extension

AGENTS.md from MetaMask/metamask-extension: 1743 lines covering Agent Instructions Summary, Quick Setup, Common Commands, Common Agent Workflows and more.

Template by MetaMask

IndexedNOASSERTION★ 13,246
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Install

Works with Codex, Cursor, GitHub Copilot, Gemini CLI, OpenCode, Claude Code. Read the repository before you give any tool access to your data.

curl -fsSL https://raw.githubusercontent.com/MetaMask/metamask-extension/main/AGENTS.md -o AGENTS.md

Read it and adapt it to your project before use.

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About

The AGENTS.md file that MetaMask/metamask-extension (13,246 stars) keeps for coding agents. It has 1743 lines in 18 sections: Agent Instructions Summary; Quick Setup; Common Commands; Common Agent Workflows; Project Structure; Working with Feature Flags; LavaMoat Security System; Browser Compatibility; Testing Strategy; State Migrations; Pull Request Workflow; Code Style & Standards; React Performance Optimization; Error Handling for Agents; Troubleshooting; Agent Pre-Completion Checklist; Additional Resources; Cursor Cloud specific instructions. Use it as a model for your own project's instructions.

Use cases: prompt-engineering, code-generation

Reviews

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What's in it

An AGENTS.md file: instructions coding agents (Codex, Cursor, Copilot, Gemini CLI and others) read before working in a repo.

For
Codex, Cursor, GitHub Copilot, Gemini CLI, OpenCode, Claude Code
Length
1,743 lines
File
AGENTS.md

Sections

  1. Agent Instructions Summary
  2. Quick Setup
  3. Common Commands
  4. Common Agent Workflows
  5. Project Structure
  6. Working with Feature Flags
  7. LavaMoat Security System
  8. Browser Compatibility
  9. Testing Strategy
  10. State Migrations
  11. Pull Request Workflow
  12. Code Style & Standards
  13. React Performance Optimization
  14. Error Handling for Agents
  15. Troubleshooting
  16. Agent Pre-Completion Checklist
  17. Additional Resources
  18. Cursor Cloud specific instructions

The repository's license isn't open source, so the text isn't shown here. Read it on GitHub.

Signals

Stars
13,246
Forks
5,601
Open issues
2,329
Last commit (this folder)
Sep 17, 2026 (1 month ago)
Last release
Oct 19, 2026 (10 days ago)

From GitHub (fetched Oct 24, 2026).

Details

License
NOASSERTION
Repository
github.com/MetaMask/metamask-extension
First seen
Oct 24, 2026
Last checked
Oct 24, 2026
Source
GitHubgithub-graphql
Cite this page

AGENTS.md · MetaMask/metamask-extension. Agent Mart. https://agentmart.dev/templates/metamask-metamask-extension-agents-md (last updated 2026-10-24)