# Format > Run code formatter on the codebase. Use this skill whenever the user asks to format code, fix code style, run prettier/biome/gofmt, or wants to ensure consistent code formatting. Also triggered as part of the verify workflow. Use when this capability is needed. - Skill: `tomevault-io/format-2` (Agent Skill, multi-file: 2 files) - Install (CLI): `npx skillmds@latest add tomevault-io/format-2` - Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/format-2/raw - Safety review: pending (external: skill-scanner PASS, skillspector PASS) - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: Productivity - Author: tomevault-io (https://skillmd.com/u/tomevault-io) - Updated: 2026-09-17 - Page: https://skillmd.com/skills/tomevault-io/format-2 --- # Format Run code formatters to automatically fix code style. ## Workflow ### 1. Discover Format Command Investigate available commands by checking project files in priority order: 1. `flake.nix` with treefmt: Use `nix fmt` (preferred for multi-language projects as it handles all formatters) 2. `Makefile` / `justfile`: Look for `format` or `fmt` target 3. Language-specific formatters: - TypeScript/JavaScript: `prettier --write .`, `biome format --write .` - Go: `gofmt -w .`, `goimports -w .` - Rust: `cargo fmt` - Python: `black .`, `ruff format .` ### 2. Run Formatter - Run the discovered format command - If the command fails due to missing dependencies, recommend the appropriate setup (e.g., `nix develop`, `npm install`) - If no formatter is configured, propose adding one appropriate for the project --- > Converted and distributed by [TomeVault](https://tomevault.io/claim/xantibody) — claim your Tome and manage your conversions.