Use this skill only when asked to review completed Biome changes in a PR, branch, commit range, diff, or working tree. Perform a read-only static review and report findings without editing files or running project code. Do not use for triage, reproduction, or…
Use this skill when a Biome change may affect users and you must decide whether it needs a changeset, choose the release level, or create and edit `.changeset/*.md` release-note text. Do not use for implementation details or PR descriptions.
Use this skill when designing or implementing Biome user-facing diagnostic presentation or APIs, including messages, advice, markup, details, code frames, categories, severity, and standalone `Diagnostic` types. Do not use for lint matching logic or…
Use this skill whenever writing or editing Rust `//`, `///`, or `//!` comments in Biome, including comments added incidentally and end-user rustdoc inside lint/assist declarations. For lint/assist rustdoc, also load lint-rule-development for content…
Use this skill when `biome migrate eslint` must preserve configurable ESLint rule options through source-option models, Biome conversions, typed rule variants, and migration fixtures. Do not use for generated severity-only mapping or general rule-option…
Use this skill when implementing or debugging Biome formatter behavior, IR composition, node rules, layout selection, source-comment handling, verbatim formatting, idempotency, internal specs, or Prettier comparison. Do not use for generic snapshot commands…
Use this skill when creating or modifying Biome lint rules or assists, including analyzer queries, semantic bindings, rule state, code actions, fix safety, options, registration, and end-user rule rustdoc. Also load diagnostics-development for substantial…
Use this skill when implementing or modifying Biome parser behavior, including `.ungram` grammars, lexers, token sources, parse rules, separated lists, error recovery, and parser fixtures. Do not use merely for consuming an existing AST/CST.