Campbell Yule has spent 30+ years operating at the intersection of architecture, BIM, and vertical software for the built environment. He led Cadimage Group as MD/Group CEO through 5x revenue growth and a 10x shareholder exit, contributed to global subscription transformation at GRAPHISOFT, and founded Cerulean Labs to build Codesign for architects. He now works as an advisor and fractional operator with founders across AEC, PropTech, and ConTech, and writes at 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.
