# biomejs/biome · RepoSense Release & Migration Intelligence

> test(cli): fix flaky symlink test by @dyc3 in #12929. Drop-in upgrade. Migration: None.

## Metadata
- **Repository URL**: https://github.com/biomejs/biome
- **Primary Package**: `@biomejs/biome` (NPM)
- **Categories**: `BUILD_TOOL`, `LINTER`, `ECOSYSTEM`
- **Latest Version**: `@biomejs/biome@2.6.6`
- **Semantic Status**: `COMPATIBLE`
- **Bundle Size Impact (unavailable)**: `Size Unavailable`
- **Atom Ingestion Feed**: https://github.com/biomejs/biome/releases.atom

## The Human Context (Plain-English Pitch)
Biome is an all-in-one code formatter and linter for JavaScript and TypeScript written in Rust. It solves the slowness and configuration conflicts of running ESLint and Prettier separately by replacing both tools with a single binary that runs in milliseconds.

## Stage 1 Executive Summary ([Core Change] + [Required Action] + [Migration Effort])
test(cli): fix flaky symlink test by @dyc3 in #12929. Drop-in upgrade. Migration: None.

## Breaking Changes & Required Actions
- test(cli): fix flaky symlink test by @dyc3 in #12929
- fix(type_inference): remove lowering override for Array type by @dyc3 in #12930
- perf(rowan): skip childless nodes and avoid segment copies in the kind-filtered walk by @dyc3 in #12931
- chore: fix skill in Zed by @arendjr in #12949

## Migration Snippet
```ts
npm install @biomejs/biome@@biomejs/biome@2.6.6
```

## Ecosystem Compatibility Matrix & Graph Warnings
- **TypeScript 5.x** [`COMPATIBLE`]: Ships standard TypeScript declaration files without type regressions.

## Zero-Noise Release Timeline
- **@biomejs/biome@2.6.6** (2026-11-06) [COMPATIBLE]: test(cli): fix flaky symlink test by @dyc3 in #12929. Drop-in upgrade. Migration: None.
- **@biomejs/biome@2.6.5** (2026-11-04) [COMPATIBLE]: Added dozens of new Vue, Tailwind, and JS linting rules. Upgrade with standard package manager. Migration: None.

## Upgrade & Migration Q&A (GEO Direct Answers)
### Is biomejs/biome @biomejs/biome@2.6.6 safe to upgrade in production?
biomejs/biome @biomejs/biome@2.6.6 is classified as COMPATIBLE (PATCH release). test(cli): fix flaky symlink test by @dyc3 in #12929. Drop-in upgrade. Migration: None.

### What breaking changes or compatibility risks exist in biomejs/biome @biomejs/biome@2.6.6?
No breaking API changes or peer dependency conflicts are recorded for biomejs/biome @biomejs/biome@2.6.6 in the RepoSense compatibility graph.

### What is the bundle size impact of @biomejs/biome @biomejs/biome@2.6.6?
Measured bundle size telemetry is currently unavailable for @biomejs/biome @biomejs/biome@2.6.6; verify build output locally before deploying.

### How do I upgrade @biomejs/biome to @biomejs/biome@2.6.6?
Upgrade @biomejs/biome to @biomejs/biome@2.6.6 by running "npm install @biomejs/biome@@biomejs/biome@2.6.6" and applying the migration steps: npm install @biomejs/biome@@biomejs/biome@2.6.6