Tooling

Prettier + ESLint vs Biome

I have switched from using Prettier + ESLint to Biome, because it is much faster, but it is not a full replacement yet.

Biome (as of v2.2) does not have the type-aware rules that typescript-eslint provides. I find those rules the most valuable, and this is holding me back from using Biome on a large codebase.

Most notably, the noFloatingPromises rule does not seem to be working reliably yet.

Things I miss from Prettier are:

• Markdown formatting
• JSDoc formatting (via plugin)

For this reason, I have kept prettier for markdown formatting. For JSDoc formatting, I have no solution yet.

If you want to see a working (shared) ESLint configuration, hop back a few commits to before Biome was introduced.

Vitest

This monorepo uses Vitest for testing. Tests can be run with:

pnpm test

A workspace configuration (vitest.workspace.ts) at the root ensures tests are discovered across all packages.