Biome support

[primerch]

Convex projects default to ESLint + Prettier for linting and formatting, which works well but can be slow and fragmented in larger codebases. Biome is a fast, all-in-one Rust-based toolchain that handles both linting and formatting in a single binary—often 10-15x faster than the ESLint + Prettier combo.

Without this, users must hack hybrid setups (e.g., scoping ESLint only to convex/ and using Biome elsewhere), which adds complexity and potential conflicts during migrations.

Thanks, really hoping to see this incorporated in a future release of the quick start command to include the Biome option

[Nicolapps]

Thank you for the proposal! We love Biome and we are proudly sponsoring the project. The reason why Convex templates default to ESLint at the moment is that we have a custom ESLint plugin with Convex-specific rules, so ESLint is a better default for Convex users. In your own projects, feel free to set up Biome (but I’d recommend to use the Convex ESLint rules as well).