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Core Concepts

Core Concepts

Preview First

Understand what the scanner validates and where its write boundary begins.

Commandpath-header-scanner scan

Category

Concepts

Quick Command

discover -> validate -> preview -> apply

Two concepts to understand first

Features

Language-aware path headers

Each supported extension uses a strategy that recognizes and renders valid comment syntax while preserving required leading lines.

Explicit mutation

A normal scan previews changes. Only effective --apply writes headers, and --dry-run always disables those writes.

Related Commands

Commands commonly used together with this command.

Path Headers

Review supported syntax and leading-line preservation.