This repository is a proxy subscription aggregation and distribution system. It periodically collects free proxy subscription links (Clash YAML and V2Ray URI formats) from multiple public sources, merges them, classifies nodes by TCP connectivity (reachable/unreachable/untested), and serves the resulting files via a Cloudflare Worker. The system is driven by a GitHub Actions workflow that runs every 12 hours, executing Python scripts to fetch, process, and commit updated subscriptions. The architecture is a data pipeline application with a serverless serving layer. Key entry points include main.py (orchestrating collection and merging), check_nodes.py (TCP connectivity classification), and worker/sub.mjs (Cloudflare Worker for serving with caching and ETag). External dependencies include requests, PyYAML, and the Cloudflare Workers runtime. The repository also includes a weekly commit history cleanup workflow to keep repository size small. The project is actively maintained with frequent updates and tests, though it relies on unstable external proxy sources.