Explore best practices for using Composer, the de-facto standard PHP dependency manager, in this 46-minute conference talk from PHP UK Conference. Learn how to leverage version constraints, understand stabilities and semantic versioning, and discover tips for being a good open-source citizen. Dive into topics such as release packages, tagging, constraints, stability flags, reproducible installs, custom commands, and more. Gain insights on working with private packages, contributing to open-source projects, and accessing community resources. Suitable for those already comfortable with Composer basics and eager to deepen their knowledge.