Biome

Biome unifies fast formatting and linting in one Rust-based toolchain. Teams adopt it to reduce config surface versus ESLint + Prettier when rule coverage matches their needs.

Migration requires a rule mapping audit: specialized ESLint plugins (custom a11y, import resolver, framework-specific) may lack Biome equivalents.

					{
  "formatter": { "enabled": true },
  "linter": { "enabled": true, "rules": { "recommended": true } }
}
				

On interviews: why unify tooling, performance gains, ecosystem gaps, CI integration, and keeping checks deterministic.

Common pitfalls: assuming 1:1 rule parity; dropping critical custom rules silently; mixing Biome format with ESLint lint without clear ownership.

The trade-off is simplicity and speed versus plugin depth in mature ESLint ecosystems.

Checklist:

• Compare rule coverage before migration.
• Measure CI time improvement realistically.
• Document intentional rule gaps.
• Keep one authoritative lint/format path.