formatter-development

Guide 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 Biome's formatting against Prettier for JavaScript, CSS, JSON, HTML, Markdown, or other languages.

biomejs/biome93 installsSynced Aug 26

Works with

Claude CodeCursorCodex CLIGitHub CopilotGemini CLI

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