tl;dr I made a service that lets you replay old podcast feeds as if they’re just starting: PodReplay.com. Continue reading if you’re curious to read a smattering of design notes and half remembered anecdotes.
.wasm file size was about 720K for a ~100 line function (plus dependencies, of course).
<itunes:block>Yes</itunes:block> tag to a feed will instruct complying podcast directories (such as Overcast or iTunes) to not list that feed publicly. I also found mentions of a
<googleplay:block> tag, but even Google’s own docs only seem to mention the iTunes tag.
I haven’t found an equivalent for JSON Feed, but I’m still not sure how widespread support actually is, especially among podcast players.
I’m only writing this up because it was strangely difficult to find any useful info when I initially searched for things like “mark podcast feed private” or “rss private tag”. Most of the results were from paid podcasts hosts with no technical details.