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Antimony: CAD Software Evolved from Lisp Machines and Not Drafting Tables

Hacker News Top ↗ · 2026-11-02 Cached

Antimony is an experimental CAD tool where solid modeling is done by connecting scriptable nodes in a DAG, using functional representations for CSG and Python-defined shapes. It supports automatic change propagation, interactive viewport editing, and STL/heightmap export with feature detection.

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Show HN: Formally verified 3D CSG: Trust 93 lines spec, not 1000 lines AI code

Hacker News Top ↗ · 2026-07-28 Cached

A formally verified 3D mesh intersection implementation in Lean 4 that requires reviewing only 93 lines of specification, trusting the Lean checker rather than 1000+ lines of AI-generated code. It demonstrates a novel approach to reducing human review effort while ensuring correctness.

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