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• Overview
• Installation
• Getting started
• Comparison
• Rendering
• Engines
• Patches

Package

• Changelog

Generate, render, and apply code diffs.

composer require alto/code-diff

Alto Code Diff compares text, renders structured differences, and parses, emits, or applies unified patches. It works with strings: reading and writing files remains the responsibility of your application.

Introduction

• Installation installs the package and lists its requirements.
• Getting started compares two strings and renders the result.

Diffing

• Comparison covers options, word-level changes, limits, and the result model.
• Rendering produces unified text, HTML, JSON, or ANSI output.
• Engines explains the built-in algorithms and extension points.

Patches

• Patches parses, emits, and applies single-file or multi-file unified patches.

The package rejects binary input and does not read files, execute Git, or resolve patch conflicts automatically.