I’ve been using Strudel.cc lately which provides a live REPL for a JavaScript equivalent to Tidal, it’s wonderful (although there’s a lack of community forums / discord which would be nice for beginners)
Offtopic: This is awesome, but oh my god, my heart almost skipped a beat when I thought it would be Renoise itself going opensource. I've been tracking with Renoise for the past 14 years and I love it to bits.
Declarative representations are also very groovy, I loved the HarmTrace guys [1] view of harmonic analysis as parsing by a grammar so the AST reflects the harmony of the piece (for instance secondary dominants are similar to subordinate clauses in normal language). It is incomplete modeling sure, yet it generates a infinite variety from a finite set of generators, that make sense tonally (hand picked, not machine-inferred).
if you're interested in live coding, you might also want to check out Glicol (https://glicol.org).
Its parser and audio engine are also implemented purely in Rust, and it supports declarative, dynamic updates. A no_std version for embedded systems is also in development.
To try it out: https://strudel.cc/