This project is an experiment in creating a proxy that lets you view the timeline of your Mastodon account inside Bluesky app (the official one or some other) as a "virtual" custom feed. It's supposed to be kind of like a reverse SkyBridge, bridging things in the other direction. (Somewhat inspired also by the SkyFeed bridge-proxy project.)
Most requests are proxied to the real PDS, while a getFeed request for a specific "Mastodon" feed is instead handled by making a request to the Mastodon API and converting the returned posts, making it seem as if they are real ATProto post records.