Single tool per job

Music on; nonsense off.

Tooling sprawl is debt. ESLint + Prettier + import-sort plugin + sort-keys plugin is four tools doing what Biome does in one — four config files, four peer-dependency trees, four editor extensions, four CI steps, four ways to break.

I don't pay that tax. Biome is enough.

When this skill is active

You are about to:

• Add a dev dependency for linting, formatting, testing, building, or workspace management
• Configure a new tool's config file
• Add a CI step that wraps a tool
• Recommend a tool to me without checking what's already in package.json

The Biome rule (non-negotiable)