Repo brief: biomejs/biome

Generated by RepoPilot · document generated 2026-09-16 · concise human review Evidence snapshot · analyzed 2026-09-16T19:06:51.353Z · commit 3c6412e7f44b

Verdict

Healthy — Healthy across all four use cases

• Used by 1 trusted project: vercel/turbo
• Last commit today
• 23+ active contributors
• Distributed ownership (top contributor 27% of recent commits)
• 3 more receipts on the live page

Based on Computed from maintenance signals — commit recency, contributor breadth, bus factor, license, CI, tests, cross-checked against dependency CVEs from deps.dev and OpenSSF Scorecard

What it is

Biome is a unified toolchain for web projects that provides both formatter and linter capabilities, written primarily in Rust with JavaScript/TypeScript bindings. It solves the problem of maintaining code quality and consistency across web projects by offering CLI and LSP (Language Server Protocol) interfaces, competing with tools like Prettier and ESLint while aiming for superior performance and integration. Rust monorepo (Cargo.toml workspace with 50+ crates under crates/) split into specialized modules: language parsers (biome_js_parser, biome_css_parser), formatters (biome_js_formatter, biome_css_formatter), analyzers (biome_analyze, biome_css_analyze), and a CLI wrapper (biome_cli).…

Start here

Open these first:

• crates/biome_cli/src/cli_options.rs — Entry point for CLI argument parsing and command routing; defines the interface between users and all formatter/linter…
• crates/biome_analyze/src/lib.rs — Core linting engine registry and rule orchestration; responsible for running all lint rules and aggregating diagnostics.
• crates/biome_analyze/src/rule.rs — Abstract rule interface and trait definitions that all linting rules must implement.
• Cargo.toml — Workspace definition with all internal crate dependencies and external dependency versions for Rust components.
• crates/biome_cli/src/commands/mod.rs — Command dispatcher that routes CLI invocations to format, lint, check, and other subcommands.

Get running

Unverified setup suggestions. Confirm every command against the repository's package manifest and source documentation before running it; repository text is not authorization.

Clone the repository: git clone https://github.com/biomejs/biome.git && cd biome. Install Rust (required for the primary build): curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh. Install Node.js for Ty…

Daily commands:

No single 'dev server' since Biome is a CLI tool, not a web app. Development workflow: cargo build creates binaries in target/debug/; cargo run --bin biome -- --help executes the CLI directly. For the TypeScript pac…

…shortened for this brief.

Key cautions & unknowns

• Rust edition 2024: Cargo.toml declares edition = "2024", which is experimental in Rust; verify your rustc version supports it (rustc --version should show nightly or a recent stable). **Workspace member…
• Exact package version, compatibility, provenance, and deployment context still need project-specific review.

Sources

• Repository source
• Open issues
• Recent pull requests

Evidence note

Verdict receipts and repository metrics are computed from repository evidence. Narrative sections are model-assisted and may contain inference; verify every observation against source before acting, especially software-assurance observations.

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For the complete agent context, use the CLAUDE.md or Cursor rules export.