Kit Extensions Development Guide

Kit extensions are single-file Go programs interpreted at runtime by Yaegi. They hook into Kit's lifecycle, register custom tools and slash commands, display widgets, intercept editor input, render tool output, register and switch color themes, and more.

Extensions can be distributed via git repositories using kit install. Repos can contain single extensions or collections of multiple extensions.

This file is the entry point. It gives the structure, a minimal example, and the constraints you must never miss. Detailed material lives in the references/ directory (see Reference files below). Read only the reference files that apply to your task.

Extension Structure

Every extension must export a package main with an Init(api ext.API) function:

//go:build ignore

package main

import "kit/ext"