Agentic fabrication detailing

The shop describes the work. The system develops the fittings.

Routing a system through a building is a problem with many good answers, and AI is genuinely good at it. Layout, coordination, clash, intent — real problems, being solved well.

A gauge is not that kind of problem. Neither is a seam, a connector, or the flat pattern of a complex fitting. Those have one right answer, and it lives in a shop's standards.

So run a 50-foot duct from the air handler and clear the structural beam is a reasonable thing to say to a person, and means nothing to a plasma table. Something has to turn the first into the second without guessing. That is what Duct Stream does.

The AI plans the work. It never draws it. A fabrication engine that has been developing these fittings in production since the 1990s does that part.

The engine

This is not new software. It ran in more than 700 fabrication shops at its 1990s peak, until the company behind it was taken over and shut down and a platform change finished off what was left.

Two shops we can account for have run it in production every single year since — seven of those years with no vendor, no support, and nobody billing them, on hardware they maintained themselves. Both resumed paying in 2018 when we reconnected, and have paid every year since.

Shops still write to us about this software. Fifteen years after it stopped being sold.

We rebuilt everything around that engine and changed nothing inside it. Its outputs are verified byte-for-byte against original production files from those years, and its gauge logic was checked case by case — 779 of 779.

For fabrication shops

Describe the work in plain language. Get back three things:

• a DWG model to coordinate from

• per-piece records to price from

• the same cutting and estimating feed this engine has been producing for shops since the 1990s

Including the fittings that normally get worked around — rolled elbow hookups, oval transitions, complex ogee offsets. And if you ask for a shift that can't practically be made in the length available, it tells you the fitting needs to be longer rather than producing something confident and unmakeable.

The pilot is invite-gated and capacity is limited. Contact us for more information: sales@ductstream.com

For platforms and agents

Duct Stream is available as a service an agent can call. If you are building design automation and need routing intent turned into manufacturable sheet metal, this is the layer that does it — deterministic, auditable, and re-runnable, so when something is wrong you can find out which step produced it rather than asking a model to try again.

Talk to us directly: sales@ductstream.com

What it doesn't do

• It's sheet metal duct. Not pipe, not plumbing, not electrical. One trade, done properly.

• It won't match your shop until we set it up to. Gauges, seams, connectors, pressure classes — every shop runs its own standards, and results are only as right as the standards behind them. Loading yours is part of onboarding, and it's real work.

• Model-native fabrication parts aren't available yet. They're being built. They aren't here.

• Capacity is limited. We would rather support a small number of shops properly than a large number badly.

• The first ninety days are a calibration period. The rates that follow are published up front, but they rest on assumptions until measured usage replaces them.

All three deliverables are yours, in formats you can open without us.

Who's building it

Jeremy Milner — co-founder Spent two years in sheet metal shops asking why a piece of abandoned 1990s software was still running in the corner. Builds the platform that replaced it.

Kevin Cruz — co-founder Twenty years running mission-critical technical programs and bringing orphaned systems back into service. Which is, more or less, the whole company.