Commit-0 is an innovative AI coding challenge designed to test the ability to create a library from scratch. The primary objective is to rebuild 54 core Python libraries and successfully pass their unit tests. Each library included in the challenge is characterized by significant test coverage, detailed specifications, and comprehensive documentation, along with linting and type checking to ensure code quality. The platform provides an interactive environment that facilitates the design and testing of new agents. Users can efficiently run tests in isolated environments, distribute testing and development tasks across cloud systems, and track all changes made throughout the process. To get started with Commit-0, users can install it using the command `pip install commit0`. The architecture of Commit-0 includes a variety of libraries, each with its own repository and a specific number of tests associated with it. Some of the notable libraries listed include minitorch, simpy, bitstring, tinydb, marshmallow, and many others, each with a varying number of tests that reflect their complexity and functionality. For instance, the web3.py library stands out with an impressive 40,433 tests, while others like wcwidth and portalocker have significantly fewer. Overall, Commit-0 presents a structured and challenging environment for developers to enhance their coding skills, engage with a wide array of libraries, and contribute to the open-source community by rebuilding and improving existing tools.