We infer the applicable codes from the project metadata + the drawings themselves.

The location + occupancy/use type tells us the governing code families (e.g., IBC/IRC, ADA, NFPA, local amendments), and then we parse the sheets for callouts, annotations, assemblies, and spec sections to map them to the relevant provisions.

So the system knows when to check (e.g., plumbing fixture clearances) because of the objects it detects in the drawings, and it knows what code to check based on jurisdiction + building type + what’s being shown in that detail.

The model still flags with human-review intent so designer judgment stays in the loop.