Photo of a sketch in. Layered DXF out.

Three loops — draft, judge, audit — extract the plan, repair its geometry against a deterministic validator, and solidify it into clean orthogonal linework. The DXF opens native in AutoCAD as a working base; the engineer's judgment finishes the sheet.

Drop the sketch photoNapkin sketch, red-lined print, whiteboard, field notes — one clear photo.

Notes for the pipeline (optional — dimensions help a lot)

LOOP 1 · DRAFT

Vision extracts walls, openings, labels from the photo

LOOP 2 · JUDGE

A critic refactors the geometry against the validator's findings

LOOP 3 · AUDIT

Final coherence pass — closure, dimensions, solidification

LINEWORK PREVIEW

The extracted plan renders here — walls, doors, windows, labels, dims.