webidl_codegen

Generate Zig bindings from WebIDL interface definitions.

11|Updated Nov 11, 2025
One-click install
npx skills add https://github.com/zig-whatwg/crane --skill webidl-codegen
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: webidl_codegen
Source: https://github.com/zig-whatwg/crane/tree/main/skills/webidl_codegen
Command: npx skills add https://github.com/zig-whatwg/crane --skill webidl-codegen

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This Skill documents and orchestrates the WebIDL code generation process that converts WHATWG WebIDL interface definitions into Zig bindings, enabling type-safe Zig interfaces, typedefs, dictionaries, and stubs.

Core Features & Use Cases

  • Codegen pipeline: Reads official WebIDL definitions from specs/idl and specs/supplementary and outputs generated Zig files under src/webidl/, including interfaces, typedefs, dictionaries, callbacks, enums, namespaces, and implementation stubs.
  • Automation and regeneration: Supports regenerating all outputs after IDL updates and optionally regenerating implementation stubs with --impls.
  • Developer workflow: Ideal for developers extending the Zig runtime with WebIDL-based APIs and for maintaining up-to-date bindings with WHATWG specs.

Quick Start

Use the WebIDL Codegen Skill to generate Zig bindings from the included IDL sources by running zig build codegen -- specs/idl/ specs/supplementary/ --dest-root src/webidl/

Frequently Asked Questions about webidl_codegen

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I generate Zig bindings from WebIDL definitions?

To generate Zig bindings from WebIDL definitions, run the command `zig build codegen` while providing IDL sources from the `specs/idl` and `specs/supplementary` directories to output type-safe Zig code under `src/webidl/`.

What WebIDL constructs are supported when converting to Zig code?

Converting WebIDL to Zig code supports interfaces, typedefs, dictionaries, callbacks, enums, namespaces, and implementation stubs, ensuring type-safe translation of WHATWG specifications into Zig bindings.

Can I regenerate implementation stubs from WebIDL sources after updating IDL files?

Yes, you can regenerate implementation stubs from WebIDL sources after updating IDL files by passing the `--impls` flag to the `zig build codegen` command, which updates the generated outputs under `src/webidl/`.

Do I need any external dependencies to automate WebIDL to Zig translation?

No external dependencies are required to automate WebIDL to Zig translation, as the Skill operates standalone using the Zig build system to parse IDL sources and emit generated bindings.

Why use automated codegen for Zig WebIDL bindings instead of writing them manually?

Automated codegen for Zig WebIDL bindings prevents human error and keeps interfaces synchronized with WHATWG specs, generating type-safe typedefs and dictionaries faster than manual implementation.