koin-migration

Koin Migration

Migration guide and AI-assisted tooling for moving Kotlin / Android / KMP projects to Koin 4.x with the Koin Compiler Plugin.

This repository is two things in one:

• Reference documentation — per-framework migration guides under skills/di-migration/references/ covering Hilt, Dagger, Toothpick, Kodein, and Koin DSL / KSP upgrades
• Claude Code plugin — the same content packaged as an AI skill (koin-migration) that Claude can use to automate migrations directly in your codebase

Installation

From Claude Code (recommended)

In a Claude Code session, run:

/plugin marketplace add InsertKoinIO/koin-migration
/plugin install koin-migration@koin-migration

The first command registers this repo as a plugin marketplace; the second installs the koin-migration plugin from it. Updates: re-run /plugin install koin-migration@koin-migration after a new release.

Manual install

git clone https://github.com/InsertKoinIO/koin-migration.git

Run Claude Code pointing at the cloned directory:

claude --plugin-dir /path/to/koin-migration

Or copy only the skill into your Claude Code skills directory (no plugin manifest, skill only):

# Project-level (shared with your team via git)
mkdir -p .claude/skills/di-migration
cp -r koin-migration/skills/di-migration/* .claude/skills/di-migration/

# Or personal (available across all your projects)
mkdir -p ~/.claude/skills/di-migration
cp -r koin-migration/skills/di-migration/* ~/.claude/skills/di-migration/

Update with git pull.

Supported Migration Paths

Source	Target
Hilt (+ Dagger)	Koin 4.x + Compiler Plugin (annotations)
Dagger 2 (no Hilt)	Koin 4.x + Compiler Plugin (annotations)
Toothpick	Koin 4.x + Compiler Plugin (annotations)
Kodein	Koin 4.x + Compiler Plugin (Safe DSL)
Koin 3.x	Koin 4.x Safe DSL + Compiler Plugin
Koin DSL	Koin 4.x Safe DSL + Compiler Plugin
Koin KSP Annotations	Koin 4.x Annotations + Compiler Plugin

For greenfield projects or manual DI / service locator code, there's nothing to migrate from — use Koin directly per the official docs at insert-koin.io and apply the same Safe DSL + Compiler Plugin conventions this skill uses.

Usage

Ask Claude to migrate your DI code. Examples:

• "Migrate this Hilt module to Koin"
• "Convert my Dagger components to Koin"
• "Upgrade my Koin 3.x project to Koin 4.x"
• "Move from Koin KSP annotations to the Compiler Plugin"
• "Convert this Toothpick scope tree to Koin"
• "Migrate this Kodein DI container to Koin"

The skill follows an 8-step workflow: Inventory → Plan → Gradle Setup → Generate Code → Wire Up → Update Injection Sites → Test Configuration → Verify & Cleanup.

Progressive migration by default: the skill recommends creating a new Koin module and moving definitions into it step by step — never rewriting your existing DI modules in place. For Hilt/Dagger projects it also surfaces the koin-android-dagger bridge so Koin and Hilt can coexist during the migration.

Key Features

• Koin Compiler Plugin (io.insert-koin.compiler.plugin) — compile-time dependency verification, zero generated files
• Auto parameter resolution — T, T?, Lazy<T>, List<T> handled automatically by the compiler
• Auto-bind — single interface implementations detected automatically, no explicit binds needed
• JSR-330 support — javax.inject.* and jakarta.inject.* annotations reusable as-is
• Custom qualifiers — existing @Qualifier annotations from Dagger/Hilt work directly
• Scope archetypes — @ActivityScope, @FragmentScope, @ViewModelScope, @ActivityRetainedScope
• Safe DSL — single<T>(), factory<T>(), viewModel<T>() with reified type parameters

Kotzilla MCP Server

During and after migration, use the Kotzilla MCP Server for AI-assisted help with Koin configuration fixes, best practices, and debugging.

Register a free account at https://kotzilla.io.

MCP Server endpoint: https://mcp.kotzilla.io/mcp (HTTP transport, requires authentication).

Example with Claude Code:

claude mcp add kotzilla --transport http https://mcp.kotzilla.io/mcp

Requirements

• Kotlin ≥ 2.3.20 (K2 compiler)
• Koin 4.2.1+

Contributing

Issues and pull requests are welcome.