Biome Docs

Biome Documentation

Official docs for Biome — one toolchain for your web project (formatter, linter, and more).

CRITICAL: grep references/ for keywords before answering. Lint rules are at references/linter/rules/.

Reference Index (546 docs)

Linter Rules (473 docs)

• references/linter/ — Linter overview and configuration
• references/linter/rules/ — Individual rule docs organized by category:
  • a11y — Accessibility rules (useAltText, useAriaProps, etc.)
  • complexity — Complexity rules (noBannedTypes, noExcessiveCognitiveComplexity, etc.)
  • correctness — Correctness rules (noUnusedVariables, noConstAssign, useExhaustiveDependencies, etc.)
  • nursery — Experimental/new rules
  • performance — Performance rules (noAccumulatingSpread, noBarrelFile, noDelete, etc.)
  • security — Security rules (noDangerouslySetInnerHtml, noGlobalEval, etc.)
  • style — Style rules (useConst, noVar, useTemplate, useImportType, etc.)
  • suspicious — Suspicious code rules (noDoubleEquals, noExplicitAny, noDebugger, etc.)

Formatter (3 docs)

• references/formatter/ — Formatter overview, options (indentStyle, lineWidth, quoteStyle, etc.)

Analyzer (1 doc)

• references/analyzer/ — Import sorting and analysis

Assist (18 docs)

• references/assist/ — Source actions and assists

Guides (11 docs)

• references/guides/ — Getting started, configure Biome, integrate in editor, integrate in CI, migrate from ESLint/Prettier, use Biome in big projects

Reference (9 docs)

• references/reference/ — biome.json schema, CLI reference, diagnostics, reporters, GritQL patterns

Recipes (4 docs)

• references/recipes/ — CI setup, Git hooks, continuous integration

Internals (6 docs)

• references/internals/ — Architecture, changelog, credits, language support, versioning

Blog (19 docs)

• references/blog/ — Release announcements and updates