I built a Spotify recently-played banner for GitHub — without registering an OAuth app (opens in new tab)

Most "Spotify for GitHub README" projects share the same setup story: go to the Spotify developer dashboard, register an app, grab a client ID and secret, plug them into some hosted service, authorize it, and hope the maintainer keeps the server running. I wanted something self-hosted, with no developer app registration at all. So I dug into how the Spotify web player authenticates — and it turns out there's a cleaner path. The trick: sp_dc + PKCE When you log into open.spotify.com, your brow...