Migration Patterns Plugin

Safe database and system migration patterns - dual write, shadow mode, strangler fig

by @laurigates 6 skills

Install

npx skillmds@latest add plugin:laurigates/migration-patterns-plugin

One command, no setup. In Claude Code it lands as a managed plugin you can enable, disable or remove with /plugin. On any other agent it installs the 6 skills into that agent's own folder.

Or inside Claude Code

In the Plugins tab, add this marketplace:

skillmds/skillmd
/plugin install laurigates-migration-patterns-plugin@skillmd

Adds the marketplace once; later plugins need the second line only.

Or install by hand

Download the plugin and unzip its skills/ folder into your agent's skills directory. Works with every agent, no CLI needed.

Download plugin Paths per agent

Just the markdown? SKILL.md files only.

This plugin

skills: 6
authors: 1

Published by a registry member. Review its skills before installing.

Skills in this plugin

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

0 installs
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Mypy To Ty · laurigates
Migrate Python type checking from mypy to ty (Astral). Use when mirrors-mypy is in .pre-commit-config.yaml or [tool.mypy] config exists.

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

1 install
▌
Flake8 To Ruff · laurigates
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.

1 install
▌
Eslint To Biome · laurigates
Migrate JS/TS linting from ESLint+Prettier to Biome. Use when .eslintrc* or eslint.config.* exists and no biome.json is present.

0 installs
▌
Black To Ruff Format · laurigates
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.

1 install