XIU2/TrackersListCollection is a curated, daily-updated collection of BitTorrent tracker URLs. It provides several pre-filtered lists (best, all, HTTP-only, no-HTTP) in both plain text and Aria2-compatible formats, served via CDN. The core of the repository is a GitHub Actions workflow (`update-trackers.yml`) that automatically fetches trackers from multiple public sources, normalizes and deduplicates them, applies a blacklist, validates DNS resolution, and performs TCP connectivity checks on HTTP/HTTPS trackers. The resulting lists are committed back to the repository and mirrored to Bitbucket. While the repo is essentially a static data repository with no application logic, the CI pipeline demonstrates a clean, modular ETL pattern using bash and standard Unix tools. The primary value is the curated tracker data itself, which is widely used in BitTorrent clients to improve download speeds.