CSS now supports dynamic @supports heads (
74af6b1)
Biome added parser, syntax, and formatter support for SCSS/CSS @supports heads that use dynamic feature declarations. This unlocks previously invalid cases and updates the generated syntax nodes and tests so the new forms round-trip correctly.
New nursery rule: noProcessExit (
d87ecd3)
This lint rule flags process.exit() usage, including ESLint migration mappings and config/schema wiring so it can be enabled like other Biome rules. It helps catch abrupt process termination that can hide cleanup bugs or make libraries harder to integrate.
New nursery rule: noSvelteInspect (21fb018)
Biome added a Svelte-specific nursery rule that reports leftover $inspect debugging uses. The rule is wired through configuration, diagnostics, and ESLint migration support so it behaves like the rest of the linter.
useButtonType docs were expanded and clarified (9bd4104)
The useButtonType rule documentation now explains the HTML default button behavior, framework pitfalls, and which type values are valid. The examples were also improved to show real form-submission cases and valid reset/submit buttons.
noUselessReturn now documents a TypeScript caveat (
f9977d9)
The rule docs now warn that removing a trailing return; can conflict with TypeScript's noImplicitReturns/checkJs behavior. That gives users a clearer path to either suppress the warning or disable the fix when the return is intentional.
Other misc changes
- Moved AI-agent skill files from
.claude/to.agents/and updated repo guidance - Updated Biome's ESLint migration mappings for the new rules