How do I install biome?

Run these in Claude Code: npx -y skills add biomejs/biome --agent claude-code. Then prompt normally.

Does biome auto-invoke its skills?

Not yet. It is indexed on Flowy as a plain plugin. Request auto-invocation on its page and Flowy will route its skills for you as you prompt.

Yes. Flowy is free and open source, with nothing gated. You can read every skill in full before you install.

Development

Plugin

biome

A toolchain for web projects, aimed to provide functionalities to maintain them. Biome offers formatter and linter, usable via CLI and LSP.

FLOW.md

biomejs@biomejs

GitHub

Plugin Signal65/100Solid

maintained100

capable53

documented1

adopted94

Install

$ npx -y skills add biomejs/biome --agent claude-code

Run the curl in your terminal, the rest in Claude Code.

Stats

JavaScript HTML CSS Rust GraphQL

+1 tag

GitHub

25,543

Stars

1,180

Forks

Active

Maintenance

Rust

Language

Apache-2.0

License

6h ago

Last commit

3y ago

Created

Repo: biomejs/biome

In this plugin

12 skills

See everything inside

What's inside

Skills

/biome-code-reviewStatic, read-only code review of a Biome (github.com/biomejs/biome) pull request, local branch, commit range, diff, or working tree being prepared as a PR. Applies Biome's own conventions - nursery placement and naming for lint rules, diagnostics quality, allocation and borrow /biome-developerGeneral development best practices and common gotchas when working on Biome. Use for avoiding common mistakes, understanding Biome-specific patterns (AST, syntax nodes, string extraction, embedded languages), and learning technical tips./changesetGuide for creating and writing proper changesets for Biome PRs. Use when a PR introduces user-visible changes (bug fixes, new features, rule changes, formatter changes, parser changes) that need a changeset entry for the CHANGELOG. Trigger when creating changesets, writing /diagnostics-developmentGuide for creating high-quality, user-friendly diagnostics in Biome. Use when creating diagnostics for lint rules, adding helpful advice to error messages, implementing code frame displays, or improving diagnostic quality./doc-commentsHow to write inline comments, rustdoc, and module documentation in the Biome codebase. The audience is Biome developers reading the source, not end users. Use whenever writing or editing `//` comments, `///` item docs, or `//!` module docs — including comments added incidentally /eslint-migrate-optionsGuide for implementing ESLint-to-Biome rule option migrators inside `biome migrate eslint`. Use whenever you add or update a Biome lint rule that has an ESLint source rule with configurable options, need to deserialize plugin-specific ESLint options, or need custom migration

Show all 12 skills

/formatter-developmentGuide for implementing formatting rules using Biome's IR-based formatter infrastructure. Use when implementing formatting for new syntax nodes, handling comments in formatted output, writing or debugging formatter snapshot tests, diagnosing idempotency failures, or comparing /lint-rule-developmentStep-by-step guide for creating and implementing lint rules in Biome's analyzer. Use when implementing rules like noVar, useConst, or any custom lint/assist rule, adding code actions to fix diagnostics, implementing semantic analysis for binding references, or adding /parser-developmentGuide for implementing parsers with error recovery for new languages in Biome. Use when adding parsing support for a new language, implementing error recovery in a parser, or writing grammar definitions in .ungram format for JavaScript, CSS, JSON, HTML, GraphQL, or other /pull-requestGuide for creating proper pull requests for the Biome project. Use when opening a PR, writing a PR description, choosing the correct target branch, or filling out the PR template. Trigger when creating PRs, writing PR summaries, or preparing code for review./testing-codegenGuide for testing workflows and code generation commands in Biome. Use when running snapshot tests for lint rules, managing insta snapshots, or regenerating analyzer/parser/formatter code after changes./type-inferenceGuide for working with Biome's module graph and type inference system. Use when implementing type-aware lint rules, understanding type resolution, working on the module graph infrastructure, or implementing type inference for new features.

README

Read on GitHub

./packages/@biomejs/biome/README.md

File tree

1762

biomejs/biomeView on GitHub

.biome.json
.cargo/
  audit.toml
  config.toml
.changeset/
  add-react-compiler-rule.md
  bitter-cats-cut.md
  breezy-pens-draw.md
  config.json
  cuddly-places-bow.md
  cyan-seals-walk.md
  every-chefs-hunt.md
  feat-html-style-attribute-css.md
  fix-svelte-double-curly.md
  hot-trams-doubt.md
  new-hornets-talk.md
  nice-jobs-shop.md
  puny-rabbits-read.md
  red-deer-doubt.md
  sweet-horses-write.md
  yummy-owls-boil.md
.claude/
  settings.json
  skills/
    biome-code-review/
      SKILL.md
    biome-developer/
      SKILL.md
    changeset/
      SKILL.md
    diagnostics-development/
      SKILL.md
    doc-comments/
      SKILL.md
    eslint-migrate-options/
      SKILL.md
    formatter-development/
      SKILL.md
    lint-rule-development/
      references/
        OPTIONS.md
      SKILL.md
    parser-development/
      SKILL.md
    pull-request/
      SKILL.md
    README.md
    testing-codegen/
      SKILL.md
    type-inference/
      SKILL.md
.coderabbit.yaml
.devcontainer/
  devcontainer.json
.dockerignore
.editorconfig
.git-blame-ignore-revs
.gitattributes
.github/
  CODEOWNERS
  documentation-issue-labeler.yaml
  ISSUE_TEMPLATE/
    01_formatter_bug.yml
    02_lint_bug.yml
    03_bug.yml
    04_task.yml
    05_umbrella.yml
    06_commercial_request.yml
    config.yml
  labeler.yml
  PULL_REQUEST_TEMPLATE.md
  renovate.json5
  scripts/
    find-stale-issues.ts
  workflows/
    actions_linter.yml
    agent_scan.yml
    autofix.yml
    benchmark_markdown.yml
    benchmark.yml
    beta_js_api.yml
    beta.yml
    close-issue.yml
    label-issue.yaml
    labels.yml
    lint_rule_docs.yml
    main.yml
    needs-repro.yml
    parser_conformance.yml
    preview.yml
    publish-crates.yml
    pull_request_js.yml
    pull_request_markdown.yml
    pull_request_node.yml
    pull_request_title_lint.yaml
    pull_request.yml
    release_cli.yml
    release_js_api.yml
    release.yml
    repository_dispatch.yml
.gitignore
.markdownlint.json
AGENTS.md
Cargo.lock
Cargo.toml
CHANGELOG_v1.md
CHANGELOG.md
CLAUDE.md
clippy.toml
CODE_OF_CONDUCT.md
CONTRIBUTING.md
crates/
  biome_analyze/
  biome_analyze_macros/
    Cargo.toml
    src/
      group_macro.rs
      lib.rs
      rule_source_variant_index.rs
    Cargo.toml
    CONTRIBUTING.md
    src/
      analyzer_plugin.rs
      categories.rs
      context.rs
      diagnostics.rs
      lib.rs
      matcher.rs
      options.rs
      profiling.rs
      query.rs
      registry.rs
      rule.rs
      services.rs
      shared/
        class_dedup.rs
        mod.rs
        sort_attributes.rs
      signals.rs
      snapshots/
        biome_analyze__profiling__tests__display_profiles_snapshot.snap
      suppression_action.rs
      suppressions.rs
      syntax.rs
      utils.rs
      visitor.rs
  biome_aria/
  biome_aria_metadata/
    build.rs
    Cargo.toml
    CONTRIBUTING.md
    src/
      lib.rs
    Cargo.toml
    src/
      event_handlers.rs
      lib.rs
      roles.rs
  biome_cli/
    Cargo.toml
    README.md
    src/
      changed.rs
      cli_options.rs
      commands/
        check.rs
        ci.rs
        clean.rs
        daemon.rs
        explain.rs
        format.rs
        init.rs
        lint.rs
        migrate.rs
        mod.rs
        rage.rs
        search.rs
        upgrade.rs
        version.rs
      diagnostics.rs
      execute/
        migrate/
        migrate.rs
          eslint_any_rule_to_biome.rs
          eslint_eslint.rs
          eslint_jest.rs
          eslint_jsxa11y.rs
          eslint_to_biome.rs
          eslint_typescript.rs
          eslint_unicorn.rs
          eslint.rs
          ignorefile.rs
          node.rs
          prettier.rs
          unsupported_rules.rs
        mod.rs
      lib.rs
      logging.rs
      main.rs
      panic.rs
      reporter/
        checkstyle.rs
        github.rs
        gitlab.rs
        json.rs
        junit.rs
        mod.rs
        profilers.rs
        rdjson.rs
        sarif.rs
        summary.rs
        terminal.rs
      runner/
        collector.rs
        crawler.rs
        diagnostics.rs
        execution.rs
        finalizer.rs
        handler.rs
        impls/
          collectors/
            default.rs
            mod.rs
          commands/
            custom_execution.rs
            mod.rs
            traversal.rs
          crawlers/
            default.rs
            mod.rs
          executions/
            mod.rs
            summary_verb.rs
          finalizers/
            default.rs
            mod.rs
          handlers/
            default.rs
            mod.rs
          mod.rs
          process_file/
            check.rs
            format.rs
            lint_and_assist.rs
            mod.rs
          watchers/
            default.rs
            mock.rs
            mod.rs
        mod.rs
        process_file.rs
        run.rs
        scan_kind.rs
        watcher.rs
      service/
        mod.rs
        unix.rs
        windows.rs
    tests/
      cases/
        assist.rs
        biome_json_support.rs
        config_extends.rs
        config_path.rs
        configuration.rs
        css_parsing.rs
        cts_files.rs
        diagnostics.rs
        editorconfig.rs
        format_with_errors.rs
        graphql.rs
        handle_astro_files.rs
        handle_css_files.rs
        handle_svelte_files.rs
        handle_vue_files.rs
        help.rs
        html_style_attribute.rs
        html.rs
        included_files.rs
        indent_script_and_style.rs
        javascript.rs
        json_parsing.rs
        linter_domains.rs
        linter_groups_plain.rs
        migrate_v2.rs
        mod.rs
        monorepo.rs
        multiple_reporters.rs
        overrides_formatter.rs
        overrides_linter.rs
        overrides_max_file_size.rs
        overrides_organize_imports.rs
        preset.rs
        protected_files.rs
        regression_tests.rs
        reporter_checkstyle.rs
        reporter_concise.rs
        reporter_github.rs
        reporter_gitlab.rs
        reporter_json.rs
        reporter_junit.rs
        reporter_rdjson.rs
        reporter_sarif.rs
        reporter_summary.rs
        reporter_terminal.rs
        rules_via_dependencies.rs
        suppressions.rs
        tailwind_directives.rs
        type_inference_profile.rs
        unknown_files.rs
        vcs_ignored_files.rs
        vue_cross_language_rules.rs
        watcher.rs
      commands/
        check.rs
        ci.rs
        explain.rs
        format.rs
        init.rs
        lint.rs
        migrate_eslint.rs
        migrate_prettier.rs
        migrate.rs
        mod.rs
        rage.rs
        search.rs
        version.rs
      configs.rs
      main.rs
      snap_test.rs
      snapshots/
        main_cases_assist/
          assist_emit_diagnostic_and_blocks_ci.snap
          assist_emit_diagnostic_and_blocks.snap
          assist_emit_diagnostic_but_doesnt_block.snap
          assist_writes.snap
        main_cases_biome_json_support/
          always_disable_trailing_commas_biome_json.snap
          biome_json_is_not_ignored.snap
          check_biome_json.snap
          ci_biome_json.snap
          formatter_biome_json.snap
          linter_biome_json.snap
        main_cases_config_extends/
          allows_reverting_fields_in_extended_config_to_default.snap
          applies_extended_values_in_current_config.snap
          extends_config_merge_overrides.snap
          extends_config_ok_formatter_no_linter.snap
          extends_config_ok_from_npm_package_with_author_field.snap
          extends_config_ok_from_npm_package_with_condition_names.snap
          extends_config_ok_from_npm_package.snap
          extends_config_ok_linter_not_formatter.snap
          extends_config_rule_fine_grained_options_merge.snap
          extends_config_rule_fine_grained_options_merge2.snap
          extends_config_rule_fix_options_merge.snap
          extends_config_two_levels_deep.snap
          extends_resolves_when_using_config_path.snap
          extends_should_raise_an_error_for_unresolved_configuration_and_show_verbose.snap
          extends_should_raise_an_error_for_unresolved_configuration.snap
          respects_unaffected_values_from_extended_config.snap
        main_cases_config_path/
          raises_an_error_for_no_configuration_file_found.snap
          raises_an_error_when_the_config_file_is_not_json.snap
          set_config_path_to_directory.snap
          set_config_path_to_file.snap
        main_cases_configuration/
          can_read_configuration_from_user_home.snap
          can_read_hidden_biome_json_file.snap
          can_read_hidden_biome_jsonc_file.snap
          uses_project_config_before_user_config.snap
        main_cases_css_parsing/
          check_combined_css_parser_flags.snap
          check_combined_format_with_errors_and_css_modules.snap
          check_css_parse_css_modules_false.snap
          check_css_parse_css_modules_true.snap
          check_css_parse_respects_config_css_modules.snap
          check_css_parse_respects_config_tailwind_directives.snap
          check_css_parse_tailwind_directives_false.snap
          check_css_parse_tailwind_directives_true.snap
          check_css_parser_flags_override_config.snap
          ci_combined_css_parser_flags.snap
          ci_css_parse_css_modules_false.snap
          ci_css_parse_css_modules_true.snap
          ci_css_parse_tailwind_directives_false.snap
          ci_css_parse_tailwind_directives_true.snap
          format_css_parse_css_modules_true.snap
          format_css_parse_tailwind_directives_true.snap
          lint_css_parse_css_modules_true.snap
        main_cases_cts_files/
          should_allow_using_export_statements.snap
        main_cases_diagnostics/
          diagnostic_level.snap
          logs_the_appropriate_messages_according_to_set_diagnostics_level.snap
          max_diagnostics_no_verbose.snap
          max_diagnostics_verbose.snap
          reads_pnpm_workspace_catalog.snap
          should_fail_when_max_diagnostics_is_zero.snap
        main_cases_editorconfig/
          end_of_line_parse_error.snap
          indent_size_can_set_to_tab.snap
... 1600 more

Showing a partial view of a very large repo.

FAQ

biome is a Claude Code plugin with 12 hand-picked skills for development work, indexed on Flowy. Install it with the command on its page. It includes biome-code-review, biome-developer, changeset. Its skills do not fire on their own yet. Request auto-invocation to have Flowy route them as you prompt. Free and open source.

What is biome?: A toolchain for web projects, aimed to provide functionalities to maintain them. Biome offers formatter and linter, usable via CLI and LSP.
How do I install biome?: Run these in Claude Code: npx -y skills add biomejs/biome --agent claude-code. Then prompt normally.
Does biome auto-invoke its skills?: Not yet. It is indexed on Flowy as a plain plugin. Request auto-invocation on its page and Flowy will route its skills for you as you prompt.
Is biome free?: Yes. Flowy is free and open source, with nothing gated. You can read every skill in full before you install.