GoKawiilI tried to use Claude Code with Opus 4.6 to implement a connector between Youtube Music and opensubsonic. The end result was a fairly short amount of time to get a working project.
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Note: I initially drafted this before my last post on how Claude Code is getting worse. I'm putting it out now so I can reference it in a future post on OpenCode. As you can imagine my opinion on Claude Code has shifted since I wrote this.
Long ago I attempted a personal project, but never finished due to life being busy. Sort of like the Japanese word Tsundoku, for the pile of books you intend to eventually read one day. We all have these projects and they are good candidates for testing out AI coding assistance. After all, they were never going to get done anyway.
The POC I put together was a shim between YouTube Music and the OpenSubsonic api. Explaining OpenSubsonic could be its own article, but for our purposes it's an API contract for nicely decoupling music streaming clients and servers. You can pick your own options for both. In my case I like Navidrome for the server, Feishin for desktop, and as I mentioned in my post on GrapheneOS, Symfonium for Android.
Anyways, the shim made YouTube Music conform to the API so I could add it to any of my clients. Under the hood I used ytmusicapi for metadata lookup and programmatically called yt-dlp to stream the music. Getting basic streaming working was pretty simple. However, there was a long tail implementing all the endpoints in a conformant way. Then as always, there were new shiny projects that stole my attention away. Like that embedded rust location project I promise I'll finish at some point. Maybe.
Luckily, nothing was really novel in that streaming project, and there is a clear spec to implement which is perfect for assisted coding. So a month and a half ago I thought I would test Claude Code with Opus 4.6 and see how it did implementing the project from scratch. After all, they gave me a free $50 in credit, so I might as well.
The setup
Since I had already written a proof of concept by hand, I had my own opinions about the implementation and laying all of that out beforehand constrained the tool in a nice way.
I did the following:
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