A robust wrapper around Symfony Process that adds configurable timeout, limited error output capture (preventing buffer overflow), detection of 'Permission denied' errors, and the ability to run commands asynchronously with output callbacks. It is fully self-contained (depends only on Symfony Process and a simple exception class) and could be extracted into any PHP project requiring safe, controlled subprocess execution. The pattern demonstrates careful error management and user-friendly output truncation.

Provides a clean abstraction for elevating privileges via sudo when writing to protected files. It automatically discovers the sudo binary, checks whether the terminal is interactive (required for sudo prompts), and can execute commands with elevated privileges. The design separates detection, prompting, and execution into distinct methods, making it easy to reuse in any CLI application that needs to modify system files. It also includes dedicated subclasses for creating files, writing content, and unlinking with sudo.

A simple, immutable value object that represents a downloaded binary file and verifies its SHA-256 checksum. It encapsulates the download path and expected hash, providing a single method to verify integrity. If verification fails, it throws a dedicated exception. This pattern is broadly reusable for any application that downloads and validates executables or packages, and demonstrates clean separation of verification logic from download or installation concerns.