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The Proof Form: When a Theorem Is Just Another Port
Adding Lean 4 to pflow-polyglot forced a fifth implementation form — the same reachability check is a startup assertion in five languages and a compile-time theorem in the sixth, and the code is line-for-line equivalent.
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The Little Language Thesis
cell, func, arrow, guard are the structural primitives — but the real ubiquitous language lives in the labels. Like Forth, we build up domain vocabularies on a minimal substrate.
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Small Models > LLMs
Why executable formal models matter more than ever in the age of AI — and how LLMs become most useful when constrained by them.