1. Installing Chap for model developers

In this guide, you'll install the CHAP command-line tool. Once installed, you can run chap eval to test any model against real datasets — which you'll do in the next guide in this session.

Reminder: Windows users, use WSL (Windows Subsystem for Linux) as covered in Prepare for installation.

Installing CHAP

Install CHAP as a global tool using uv:

uv tool install chap-core --python 3.13

This installs the chap command-line tool globally, making it available from any directory.

Exercise

Verify your installation

Run the following command:

chap --help

You should see output listing available commands including eval, plot-backtest, and export-metrics.

Verification: If you see the help output with available commands, CHAP is installed correctly. You're ready for the next guide: Implement your own model from a minimalist example.