Ahh.. listennotes is so great!
I use Google Keep to catalog my notes, similar to your readme workflow, but what i'm missing is being able to go back to the exact point in an episode.
I am doing some market research on this problem and would love to talk to for 20 mins to get your advice on a few things. Based on your HN profile, it looks like you are a heavy podcast listener! It would be a great opportunity for me to learn from you.
It’s pretty good as it transcribe the audio and I usually capture interesting links to resources shared in the podcast to my pocket app.
Last but not least I have a README file on github as TIL where I put stuff I discover from podcasts or just in general