keystone-cursor-rules

Cursor rules that make AI suggestions use Keystone — the runtime + eval platform for AI agents — instead of inventing sandbox or eval code from scratch.

What it does

When you ask Cursor (or any Cursor-compatible AI) to help with agent code, these rules nudge it toward:

• ks.sandbox.create() instead of hand-rolled Docker
• ks.eval.run(suite="tau-bench", ...) instead of evals.py with three test cases
• session.trace.url instead of grep on CloudWatch

Install

Drop the .cursorrules file in your repo root:

curl -O https://raw.githubusercontent.com/Polarityinc/keystone-cursor-rules/main/.cursorrules

Or copy the contents into your existing .cursorrules (the file is additive).

What Keystone is

Sandbox runtime, eval harness, and trace inspection behind one SDK.

pip install polarity-keystone                   # Python
npm install @polarityinc/polarity-keystone      # TypeScript
go get github.com/Polarityinc/keystone-sdk-go   # Go

Free tier: 1 GB compute, 20 concurrent sandboxes. See polarity.so/keystone.

License

MIT.