dart-use-ffigen

Generate Dart FFI bindings from native C headers using package:ffigen.

428|29|Updated Feb 25, 2026
One-click install
npx skills add https://github.com/dart-lang/skills --skill dart-use-ffigen
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: dart-use-ffigen
Source: https://github.com/dart-lang/skills/tree/main/skills/dart-use-ffigen
Command: npx skills add https://github.com/dart-lang/skills --skill dart-use-ffigen

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Automates the generation of Dart FFI bindings from native C headers to replace hand-written bindings and reduce errors.

Core Features & Use Cases

  • Automated FFI Bindings: Generates Dart bindings from C headers using package:ffigen, ensuring consistent signatures and types.
  • Best Practices & Constraints: Enforces generator location, header placement, and output structure to support tree-shaking and licensing requirements.
  • Use Case: When integrating a new native library, replace manual bindings with an automated, reproducible binding pipeline.

Quick Start

Run the FFI generator to produce Dart bindings from C headers using package:ffigen.

Frequently Asked Questions about dart-use-ffigen

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

FAQPage Schema
How do I generate Dart FFI bindings from C headers automatically?

You can generate Dart FFI bindings from C headers automatically by using package:ffigen to parse native headers and output reproducible Dart signatures, replacing manual dart:ffi code.

What is the best way to replace hand-written dart:ffi bindings?

The best way to replace hand-written dart:ffi bindings is to automate the pipeline with package:ffigen, which ensures consistent type signatures and reduces manual coding errors from C headers.

Does ffigen support tree shaking for unused native bindings?

Yes, ffigen supports tree shaking by generating a record_use mapping alongside the Dart bindings, ensuring unused native code is removed during the final build.

Where should I place generated FFI bindings in my Dart project?

You should place generated FFI bindings under the lib/src/third_party directory to comply with structural constraints, support tree shaking, and meet licensing requirements.

Can I use ffigen to integrate a new native library into Dart?

Yes, you can use ffigen to integrate a new native library into Dart by pointing the generator to the C headers and creating an automated, reproducible binding pipeline.

Why does ffigen enforce header placement and output structure?

ffigen enforces header placement and output structure to support tree shaking, manage licensing requirements, and ensure the generated Dart bindings are reproducible and maintainable.