Legacy modernization

Modernize test suites to use modern Swift Testing features or migrate from XCTest.

CamilleScholtz/swmpc

A skill your agent uses for new frontend applications, dashboards, games, creative websites, hero sections, and visually driven UI from scratch, or when the user explicitly asks for a…

fcakyon/claude-codex-settings

Atmos caching: CI cache configuration and commands, GitHub Actions cache integration, Terraform registry cache mirror/list/prune/stats/trust, and cache modernization guidance

cloudposse/atmos

Atmos Modernization: migrate deprecated or legacy Atmos patterns to current names, Native CI, Atmos Pro drift detection, dependencies.components, nametemplate, and declared secrets

cloudposse/atmos

Workflow for converting, modernizing, upgrading, or re-architecting code (e.g.

griddynamics/rosetta

Orchestrate a comprehensive legacy system modernization using the strangler fig pattern, enabling gradual replacement of outdated components while maintaining continuous business operations through ex

aiskillstore/marketplace

Assess and upgrade Azure workloads between plans, tiers, or SKUs, or modernize Azure SDK dependencies in source code.

microsoft/GitHub-Copilot-for-Azure

Check ETL step files for outdated coding patterns and offer to fix them.

owid/etl

Apply Michael Feathers-inspired legacy-code rules when changing hard-to-test code safely with characterization tests, seams, sprout methods, or wrap methods.

ciembor/agent-rules-books

Diagnoses latent architectural modernization opportunities across Dart and Flutter packages (language idioms, testing hygiene, CLI patterns, doc rot) and prescribes matching specialized skills.

kevmoo/dash_skills

Audit a stale, inherited, or messy codebase — deps, bugs, security, tests, CI, docs, UI/UX — then emit a phased, testable modernization plan.

luongnv89/skills

Refactor legacy codebases, migrate outdated frameworks, and implement gradual modernization.

aiskillstore/marketplace

Guide the migration of legacy AdvPL (Advanced Programming Language) code to modern TLPP (TOTVS Language Plus Plus).

totvs/engpro-advpl-tlpp-skills

Safely change and test untested codebases using Feathers' "Working Effectively with Legacy Code".

wondelai/skills

Modernize Golang code to use recent language features, standard library improvements, and idiomatic patterns.

aiskillstore/marketplace

Measure and raise straight-through processing (STP) rates in securities operations through zero-touch, exception-based processing.

JoelLewis/finance_skills

Build and modernize WPF applications on .NET with correct XAML, data binding, commands, threading, styling, and Windows desktop migration decisions.

managedcode/dotnet-skills

Generates tests that capture current behavior of existing code before refactoring.

gustavscirulis/snapgrid

Scan project structure, detect languages and frameworks, identify entry points and application boundaries.

EmeaAppGbb/spec2cloud

Create a prioritized modernization roadmap from assessment findings.

EmeaAppGbb/spec2cloud

Catalog existing tests — discover test frameworks, count tests by type, parse coverage reports, and map test-to-feature relationships.

EmeaAppGbb/spec2cloud

Comprehensive codebase cleanup across 11 quality dimensions: dead code, duplication, weak types, circular deps, defensive cruft, legacy code, AI slop, type consolidation, security, performance, and…

jeremylongshore/tons-of-skills-marketplace

Plan and execute a phased migration of data pipelines, Ontology applications, or external integrations into Foundry.

jeremylongshore/tons-of-skills-marketplace

Guided journey from a working codebase grown slow and tangled to one measurably fast, cleanly bounded, and readable.

wondelai/skills

Guided journey from a working-but-untested vibe-coded prototype to a production-ready product with tests, clean structure, a business-rules boundary, and resilience at scale.

wondelai/skills

Migrate COBOL code to idiomatic Java, preserving business logic while following Java best practices.

OpenHands/extensions

Apply a condensed version of the ISO C++ Core Guidelines to C++ design, implementation, refactoring, modernization, and code review.

SpecterOps/skills

Write, review, or modernize F code in .NET repositories with functional-first design, algebraic data types, pattern matching, pipelines, async workflows, project ordering, and C interop.

managedcode/dotnet-skills

Detailed implementation guide for the Strangler Fig pattern and related migration patterns for incrementally replacing legacy systems.

revfactory/harness-100

Migrates legacy AEM (6.x, AMS, on-prem) to AEM as a Cloud Service via BPA CSV/cache and CAM/MCP discovery, one pattern per session.

adobe/skills

End-to-end COBOL to Java migration workflow. An agent skill from OpenHands/extensions.

OpenHands/extensions

Systematic framework for resurrecting and modernizing legacy codebases through archaeology, resurrection, and rejuvenation phases.

curiositech/some_claude_skills

Maintain classic ASP.NET applications on .NET Framework, including Web Forms, older MVC, and legacy hosting patterns, while planning realistic modernization boundaries.

managedcode/dotnet-skills

A skill your agent uses when the user asks to explain what a piece of ADVPL/TLPP code does in plain language, adapting the explanation depth for a junior developer (line-by-line), a senior developer…

thalysjuvenal/advpl-specialist

Assess codebase for modernization opportunities — tech debt, deprecated dependencies, outdated patterns, architectural improvements.

EmeaAppGbb/spec2cloud

Trigger Protocol has migration patterns (reinitialize, V2/V3, deprecated, upgrade, legacy, Coin-to-FA) - Covers Token type mismatches, stranded assets, interface incompatibiliti...

PlamenTSV/plamen

Trigger Protocol has migration patterns (reinitializer, V2/V3, deprecated, upgrade, legacy) - Covers Token type mismatches, stranded assets, interface incompatibilities

PlamenTSV/plamen

Upgrade a plugin's skills, hooks, and patterns to align with latest Claude Code capabilities and best practices.

kenneth-liao/ai-launchpad-marketplace

Produces comprehensive summaries and insights about legacy codebases to help understand unfamiliar code.

ArabelaTso/Skills-4-SE

Write AST-based code search and rewrite rules using ast-grep YAML.

aiskillstore/marketplace

Refactor legacy codebases, migrate outdated frameworks, and implement gradual modernization.

Dokhacgiakhoa/Agent-Skills-4-Vibe-Coding-CLI