From the README:

This repository contains:

• wire: a Zig module that defines types for Wayland's wire format and functions to serialize and deserialize messages.
• shimizu-scanner: a command to take Wayland XML protocol descriptions and turn them into Zig types.
• core: The Wayland core protocol as a Zig module, generated by shimizu-scanner
• shimizu: A Zig module that provides higher level Connection and Proxy types.