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> What is the Typst of formal modeling?

better question is "what's the markdown of formal modeling?"

the best outcome for everyone is to have something that's so easy it's ubiquitous

The closest thing I’ve come across to this is Z (“Zed”) notation. It’s from the late 70s, quite influential and pretty easy to read with a bit of logic symbolism. The same designer (Jean-Raymond Abrial) and colleagues also made the B method which can also do program refinement. Several other “well-known” (relative to other formal methods) formal specification systems were influenced by Z, including possibly TLA+ as I’ve read somewhere (but cannot confirm). Z and B both have free tooling available online.

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