There should be an AGENTS.md so code agents have a starting point

[bentito]

Make it easier on code agents to do the right thing right away. We should provide an AGENTS.md that outline the project from a code standpoint; outlines what code does what and generally makes it easier for code agents to pitch in to help the project.

I already made a PR: #204

[bentito]

Just to give some context:

This is a community blog promoting and explaining the AGENTS.md standard: https://agentsmd.net/

OpenAI's codex agent looks for AGENTS.md on startup:
https://platform.openai.com/docs/codex/overview#how-it-works

The Jules coding agent does so as well: https://platform.openai.com/docs/codex/overview#how-it-works

The Aider coding agent is considering supporting this standard: Aider-AI/aider#4363