Testing the Agentic BIM Thesis – Four Prototypes – Campbell Yule – aec.tech.advisory

Four prototypes against Martyn Day’s agentic BIM thesis, built on ThatOpen. Geometry as code held up. Declarative rules became legible to LLMs. Live model state confirmed what BIM 2.0 is already shipping. Multi-agent broke in interesting ways. A short account of what the building exercise made concrete — and the four practical takeaways for anyone trying to build in this space.