legacy-modernization

v0.1.4

Legacy modernization team — agents (modernization-strategist, codebase-archaeologist, refactoring-engineer, legacy-migration-engineer) for safely changing a working-but-aging system: assess the estate and choose among the 6 R's (retain/rehost/replatform/refactor/rearchitect/replace), understand undocumented code and find its seams, characterize behavior before touching it, strangle the monolith incrementally behind an anti-corruption layer, migrate data with dual-write/parallel-run, and cut over with a tested rollback. skills, a knowledge bank with Mermaid decision trees + a dated 2026 capability map, best-practices, templates, commands, an advisory hook. Seams: backend redesign -> backend-engineering, schema migration mechanics -> database-engineering, deploy/cutover automation -> devops-cicd, test-suite buildout -> qa-test-automation. Inherits ravenclaude-core protocols.

Claude Code5 Skills

By Matt CorbettLicense: MIT7 GitHub starsUpdated last week

Directory evidence

Runtimes: Claude Code
Parsed components: 5 skill or MCP entries
Source updated: Sep 15, 2026
Manifest status: Canonical path parsed

The directory validates manifest shape and source location. It does not execute the plugin or provide a security endorsement. Review the indexing methodology →

Install legacy-modernization for Claude Code

Installs for the current user

claude plugin marketplace add IchenDEV/agent-plugin-mkt
claude plugin marketplace update agent-plugin-marketplace
claude plugin install legacy-modernization@agent-plugin-marketplace

Paste and run these commands in a terminal with Claude Code. They add and refresh the PluginsMP catalog, then install this plugin.

The installer fetches third-party code from the source repository shown on this page. This directory validates manifest structure and source location, but does not perform a security audit; review the manifest, components, and source before installing.

Get the source manually

$ git clone https://github.com/mcorbett51090/RavenClaude

Clone the source repository, then follow its setup instructions to add the plugin to a compatible client. The plugin root is plugins/legacy-modernization/.

Plugin files

plugins/legacy-modernization/

├── .claude-plugin/plugin.json
├── skills/assess-legacy-estate/SKILL.md
├── skills/characterization-testing/SKILL.md
├── skills/data-migration-and-cutover/SKILL.md
├── skills/dependency-and-framework-upgrade/SKILL.md
└── skills/strangler-fig-migration/SKILL.md

Included Skills5

assess-legacy-estateskills/assess-legacy-estate/SKILL.md

Assess a legacy system and choose a modernization strategy with the 6 R's (retain/rehost/replatform/refactor/rearchitect/replace). Reach for this when the question is 'rewrite or refactor?' or 'is this worth modernizing?'.

characterization-testingskills/characterization-testing/SKILL.md

Pin a legacy system's current behavior with characterization / golden-master / approval tests before changing it, so a refactor that changes behavior fails loudly. Reach for this before any edit to untested legacy code.

data-migration-and-cutoverskills/data-migration-and-cutover/SKILL.md

Migrate data off a legacy store with dual-write / parallel-run / reconciliation, then cut over with go/no-go gates and a tested rollback. Reach for this for any zero-downtime move or final switch-over.

dependency-and-framework-upgradeskills/dependency-and-framework-upgrade/SKILL.md

Upgrade a stuck dependency, framework, or language version incrementally — one major at a time, on green tests, deprecations resolved between each — instead of a single risky leap. Reach for this when a system is several versions behind.

strangler-fig-migrationskills/strangler-fig-migration/SKILL.md

Plan an incremental strangler-fig migration off a legacy system — a facade routing one capability at a time to a new implementation behind an anti-corruption layer. Reach for this instead of a big-bang rewrite.

Plugin manifests1

plugins/legacy-modernization/.claude-plugin/plugin.json

{
  "name": "legacy-modernization",
  "version": "0.1.4",
  "description": "Legacy modernization team — agents (modernization-strategist, codebase-archaeologist, refactoring-engineer, legacy-migration-engineer) for safely changing a working-but-aging system: assess the estate and choose among the 6 R's (retain/rehost/replatform/refactor/rearchitect/replace), understand undocumented code and find its seams, characterize behavior before touching it, strangle the monolith incrementally behind an anti-corruption layer, migrate data with dual-write/parallel-run, and cut over with a tested rollback. skills, a knowledge bank with Mermaid decision trees + a dated 2026 capability map, best-practices, templates, commands, an advisory hook. Seams: backend redesign -> backend-engineering, schema migration mechanics -> database-engineering, deploy/cutover automation -> devops-cicd, test-suite buildout -> qa-test-automation. Inherits ravenclaude-core protocols.",
  "author": {
    "name": "Matt Corbett"
  },
  "homepage": "https://github.com/mcorbett51090/RavenClaude",
  "license": "MIT",
  "keywords": [
    "legacy-modernization",
    "strangler-fig",
    "refactoring",
    "characterization-tests",
    "technical-debt",
    "migration",
    "anti-corruption-layer",
    "rewrite-vs-refactor",
    "6-rs",
    "cutover"
  ],
  "requires": {
    "plugins": [
      "ravenclaude-core@>=0.7.0"
    ]
  }
}