migration-patterns-plugin

v1.6.0

Migration patterns - dual write, shadow mode, and automated tool migrations (mypy→ty, black→ruff-format, flake8→ruff, ESLint→Biome)

Claude Code7 Skills

58 GitHub starsUpdated last week

Directory evidence

Runtimes: Claude Code
Parsed components: 7 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 migration-patterns-plugin 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 migration-patterns-plugin@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/laurigates/claude-plugins

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

Plugin files

migration-patterns-plugin/

├── .claude-plugin/plugin.json
├── skills/black-to-ruff-format/SKILL.md
├── skills/dual-write/SKILL.md
├── skills/eslint-to-biome/SKILL.md
├── skills/flake8-to-ruff/SKILL.md
├── skills/mypy-to-ty/SKILL.md
├── skills/shadow-mode/SKILL.md
└── skills/tool-migration-cutover/SKILL.md

Included Skills7

black-to-ruff-formatskills/black-to-ruff-format/SKILL.md

Migrate Python formatting from black to ruff-format. Use when psf/black is in .pre-commit-config.yaml or [tool.black] exists in pyproject.toml.

dual-writeskills/dual-write/SKILL.md

Dual-write pattern for safe data store transitions. Use when planning DB migrations, switching storage backends, or reviewing code writing to multiple systems simultaneously.

eslint-to-biomeskills/eslint-to-biome/SKILL.md

Migrate JS/TS linting from ESLint+Prettier to Biome. Use when .eslintrc* or eslint.config.* exists and no biome.json is present.

flake8-to-ruffskills/flake8-to-ruff/SKILL.md

Migrate Python linting from flake8/isort to ruff. Use when pycqa/flake8 or PyCQA/isort is in .pre-commit-config.yaml or [tool.flake8]/[tool.isort] config exists.

mypy-to-tyskills/mypy-to-ty/SKILL.md

Migrate Python type checking from mypy to ty (Astral). Use when mirrors-mypy is in .pre-commit-config.yaml or [tool.mypy] config exists.

shadow-modeskills/shadow-mode/SKILL.md

Shadow mode / dark-launch for validating new systems under production load. Use when testing replacement services, comparing behavior, or planning traffic mirroring for migrations.

tool-migration-cutoverskills/tool-migration-cutover/SKILL.md

Migrating between tools (Dependabot to Renovate, PAT to GitHub App, one linter to another). Use when removing the incumbent, to verify the replacement actually runs rather than merely configured.

Plugin manifests1

migration-patterns-plugin/.claude-plugin/plugin.json

{
  "$schema": "https://json.schemastore.org/claude-code-plugin-manifest.json",
  "name": "migration-patterns-plugin",
  "version": "1.6.0",
  "description": "Migration patterns - dual write, shadow mode, and automated tool migrations (mypy→ty, black→ruff-format, flake8→ruff, ESLint→Biome)",
  "keywords": [
    "migration",
    "dual-write",
    "double-write",
    "shadow-mode",
    "dark-launching",
    "strangler-fig",
    "database-migration",
    "zero-downtime",
    "mypy",
    "ty",
    "ruff",
    "black",
    "flake8",
    "isort",
    "eslint",
    "biome",
    "tooling-migration"
  ]
}