Effects and code as a database in Unison: https://jaredforsyth.com/posts/whats-cool-about-unison/
Unison is looking at changing their program representation to plain sqlite!
miniblog.
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Unison has a really nice docstring model, with helpers to interpolate values or function syntax!
https://www.unisonweb.org/docs/documentation/
Unison is exploring the idea of storing source code by the hash of its AST, which allows some interesting refactoring and testing designs: https://www.theregister.co.uk/AMP/2019/09/26/unison_programming_language/
Excellent discussion of a Unison meetup, discussing their design (globally consistent content-addressed codebases!), type system, and tooling: https://unisonweb.org/2019-04-04/first-meetup.html#post-start
It's really impressive how much they've achieved.