Best code migrations skills for Claude Code, Codex and other agents.

Plans and carries out moving non-host-specific code and its tests from the OpenHuman core into vendored tiny submodule libraries, then releases the submodule and re-pins the host.

tinyhumansai/openhuman

Moves a package from another TryGhost repository into Ghost as an internal workspace package while keeping its Git history, with checkpoints for the steps that need an administrator.

TryGhost/Ghost

Turn on Cache Components in a Next.js app and resolve the blocking routes it surfaces.

vercel/next.js

Walks through deprecating an R function or argument in a package: lifecycle warning, silenced tests, a new snapshot test, documentation badge and NEWS entry.

tidyverse/dplyr

Guides an upgrade from Chakra UI v2 to v3: inspect the project, swap packages, run the official codemod, then fix provider, color mode, props, theming and Next.js code.

chakra-ui/chakra-ui

Rules for choosing Rust types for filesystem paths in new Codex code, covering protocol types, internal use and model tool arguments.

openinterpreter/openinterpreter

Searches and rewrites code by syntax-tree shape across 25 languages with ast-grep, for codemods, structural queries and YAML lint rules, using a Python wrapper script.

code-yeongyu/oh-my-openagent

Moves a legacy internal Ghost package from JavaScript and CommonJS to TypeScript and ESM in three focused commits that keep git file history intact.

TryGhost/Ghost

Ports an existing Remotion (React) composition to HyperFrames HTML with GSAP, one way, and grades the result against a tiered set of reference fixtures.

heygen-com/hyperframes

Measures a code port between languages or frameworks with jscpd's function-level comparison, porting tests before code and tracking what is left unmatched.

kucherenko/jscpd

Guides migrating a goldmark Markdown extension from v1 to v2, with a confirmed plan, breaking-changes reference and extension-pattern guide.

yuin/goldmark

Upgrade Next.js to the latest version following official migration guides and codemods

vercel-labs/openreview

Converts RStudio Python Selenium electron tests into TypeScript Playwright tests, checking each against a live RStudio before counting it as migrated.

rstudio/rstudio

Directs porting of widgets, dialogs, panels and transforms from PlotJuggler 3 to PlotJuggler 4 by lifting the original files intact and rebinding only the data paths.

PlotJuggler/PlotJuggler

Upgrade an AWS Glue ETL job from Glue version 0.9 or 1.0 to Glue 4.0.

aws-samples/aws-glue-samples

Compares two folders function by function with jscpd --compare, across languages if needed, and explains which functions match and which have no counterpart.

kucherenko/jscpd

Upgrades a Python standard library module from CPython into RustPython with update_lib, then triages and marks the tests that still fail.

RustPython/RustPython

Updates the obs-multi-rtmp plugin repo to the latest upstream plugin template and OBS Studio version, including dependency metadata, then rebuilds it with CMake.

sorayuki/obs-multi-rtmp

Audit and implement a NemoClaw dependency version upgrade, including Hermes and base images.

NVIDIA/NemoClaw

Reference for writing and debugging TypeScript and JavaScript codemods with @ast-grep/napi: parsing, node queries, meta-variables, rule objects and editing.

warp-drive-data/warp-drive

Plans and carries out the migration of a Go application from goldmark v1 to v2, with a written plan, human sign-off, updated tests and documentation.

yuin/goldmark

Explore an existing PostgreSQL database before answering questions about its data or writing SQL.

timescale/pg-aiguide

Manage major dependency version upgrades with compatibility analysis, staged rollout, and comprehensive testing.

sangrokjung/claude-forge

A skill your agent uses when preparing to publish a new version of a PHP Composer package and need to write or update CHANGELOG, upgrade guides, and documentation before tagging and releasing

yansongda/pay

Fix violations of an eslintPluginScraps rule across the codebase.

getsentry/sentry

Rules for writing and converting formatted output in ripwire's C++ source with its emit helpers, keeping every printed byte identical to the old printf output.

redhat-et/ripwire

Syncs or audits ccLoad's CLIProxyAPI protocol-conversion core and registered provider adapters against one pinned upstream commit, then verifies the result.

caidaoli/ccLoad

Author, archive, apply, and verify TypeScript codemods with ts-morph for APIs that have reached the remote default branch or external users.

pmndrs/glyph

Analyzes a Rails app and builds an upgrade report with breaking changes, deprecations and step-by-step migration guides, one version at a time from Rails 2.3 through 8.1.

ombulabs/claude-code_rails-upgrade-skill

Prepare a release (bump the crate version, update CHANGELOG.md with a migration guide for breaking changes, regenerate README, commit), or run a pre-release review.

jaemk/self_update

Run a large-scale language migration with the six-step process: create the map and the rules, stress-test the rules, translate everything, compile, run it, match behavior.

anthropics/code-migration-kit-with-claude-code

Create a new Axon Framework 4→5 migration path documentation page.

AxonIQ/AxonFramework

Prepare a release (bump versions across all Cargo.toml files, update CHANGELOG.md, refresh the migration guide, regenerate README, commit), or run a pre-release review.

jaemk/cached

Guidance for Groovy 5 work in Grails projects: syntax, closures, traits, DSLs, metaprogramming, Spock tests, static compilation and Java 21 integration.

apache/grails-core

Forward-ports or backports a single PR or branch onto the currently checked-out Saleor branch, handling GraphQL version markers and migration numbering along the way.

saleor/saleor

Create the release notes and upgrade guide for a mariadb-operator release.

mariadb-operator/mariadb-operator

Assesses what an API change would break before it is made, finds every usage, documents the impact and plans a deprecation or migration path.

ruby-git/ruby-git

This skill should be used when the user asks to create a new Montage migration skill for the montage-web-migration plugin (e.g.

wanteddev/montage-web

Adds support for a new Laravel major to a package by extending composer.json constraints for illuminate, Testbench and Pest and the CI test matrix.

mailcarrierapp/mailcarrier

Migrate React Native apps from @react-native-community/geolocation to react-native-nitro-geolocation.

jingjing2222/react-native-nitro-geolocation

Migrate a .NET 8 project to .NET 9 and resolve all breaking changes.

dotnet/skills

Complete guide for converting Arduino/ESP32 hardware libraries into Aily Blockly compatible format.

ailyProject/aily-blockly

Looks up antd component props, docs, demos and changelogs with the offline @ant-design/cli, and helps debug, migrate between versions and audit usage in a project.

ant-design/antd-skill

Guides changes to the grails-data-hibernate7 module, covering domain binding, Hibernate 5 to 7 migration work, generators and integration specs.

apache/grails-core

Use ast-grep for Python structural code exploration, mechanical codemods, and rule maintenance in this repo.

banteg/crimson

Guides writing, fixing and migrating tests in Go repositories that use the gotest suite framework, including version differences and CI setup.

mvrahden/go-test

Analyze Skia features for SkiaSharp - produces a unified analysis of what shipped (upstream engine benefits, PR links, migration guides) and what's missing (impact/priority/effort scoring, hidden…

mono/SkiaSharp

Plans a WxJava version upgrade, checking the BOM, module dependencies, JDK version and configuration, with phased steps and clear rollback conditions.

binarywang/WxJava