[phil42]

That's what I started with originally, but it's not offline and stores all data on their servers. Something like Workflowy but offline or self-hosted would be brilliant.

[shaism]

I created a version for personal use a month ago.

https://github.com/SharifIsmail/tendril

Feel free to give it a try. Agents can also directly interact with it.

[karencarits]

Maybe someone can put Claude Fable on it

[AbstractH24]

So, Obsidian?