Built a web IFC cost parameter editor with AI agents and ThatOpen Engine in 2.5 days
Hi there! i wanted to share something i have been working on. its whether a team of AI agents could build a real BIM tool from scratch. Turns out — yes, they can.
The problem: IFC workflows that every company needs differently — extracting quantities, mapping cost line items, enriching the model. No platform solves it exactly the way you need it.
The setup: Four agents with defined roles. One handles design and problem decomposition, one implements BIM logic, one covers UI, one coordinates. The key insight isn't automation — it's intelligent delegation.
The result: A web editor that loads IFC, renders the 3D model, maps cost items with a three-tier suggestion system (business rules → semantic KNN → LLM fallback), and exports an enriched IFC. All in the browser. Two and a half days of development.
Some decisions the agents couldn't make on their own. WASM integration with Vite needed direct human judgment — and that's part of the process too.
https://i.redd.it/ys9ij43kaltg1.gif
This is the first post in a series on building a BIM Manager Agentic Toolkit — open source tools for BIM professionals to orchestrate agents, build custom solutions, and automate workflows.
Full breakdown — architecture, agent setup, and lessons learned here: https://open.substack.com/pub/rzlazo/p/de-ifc-a-presupuesto-como-orqueste?r=1lb2ew&utm_campaign=post&utm_medium=web