Package Control is the official package manager for Sublime Text, handling installation, upgrade, and removal of packages and libraries. It is implemented as a Sublime Text plugin with a command-based interface and deep integration with the editor's API. The system fetches package metadata from multiple sources (GitHub, GitLab, Bitbucket, PyPI, and custom JSON channels/repositories) using a pluggable downloader architecture that supports caching, rate limiting, proxy authentication, and SSL validation. It includes a full PEP 440 version parser and specifier engine for dependency resolution, and manages package lifecycle through background threads to keep the editor responsive. The codebase is well-structured with extensive unit tests, but is tightly coupled to the Sublime Text runtime environment, limiting direct reuse outside of ST plugins.