PodOsef is an MP3-first podcast publishing system: drop MP3s into a folder, it generates HTML + RSS. No DB, the MP3 metadata is the source of truth. Also supports an archive mode that watches a main feed and mirrors episodes. Repo + write-up:
https://meirz.net/2026/02/22/podosef-mp3-first-lightweight-simple-podcast-publishing-system/
The banner image looks like AI.