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---
name: format-changed
description: Format changed files through an existing external formatter command.
execution_mode: command
supported_agents:
- claude
- codex
allowed_tools:
- bash
- node
command: npx prettier@3.4.2 --write .
runtime: node
compatibility:
requires:
- node >=20
supported_os:
- darwin
- linux
repo_required: true
network_required: true
notes:
- The first run may download the pinned package through npm.
safe_to_retry: true
writes_files: true
produces_json: false
---
# Format Changed Files
## What it does
Runs a repository formatter through an existing external CLI instead of custom Go code.
## When to use
Use this when the repository already standardizes on a formatter and you want a reusable skill wrapper around it.
## How to run
Run `npx prettier@3.4.2 --write .` from the repository root or adapt the command to the subset of files you want to format.
## Constraints
- This is a non-interactive command.
- It may download dependencies on the first run.
- It writes files in place, so review the diff after execution.
