Agent skill
Your agent will tell you the data looks fine
It cannot measure the data it is describing, so it guesses and you find out later. This gives it checks it runs itself—on your machine, on your files, before it answers.
- Claude
- Cursor
- ChatGPT
- Grok
Node 20+ to install Python 3.8+ for the helpers
Install
Install the data-validation-rules skill with npx govalidate-lite, then ask me what I need to check.Works anywhere your agent has a shell—desktop, web, mobile, IDE. It runs the install itself.
npx govalidate-liteRun it in your project. It writes into the agent roots you already have, or creates .claude/skills if you have none.
4× less time fixing its work Same task, same agent, graded blind. Without it: 40 minutes of fixes, 38/40 checks. With it: 10 minutes, 40/40.
It reads your files. That’s all it does.
- Never leaves your machine No upload, no account, no API key.
- Never touches the original The helpers only read. A repair writes a new file beside yours.
- Nothing you can’t read Five Python scripts, standard library only. Open them, change them.
There is a Pro skill
It adds the deterministic engine behind these checks. Not publicly available yet.