A blueprint is a building written down. Lay it out and it becomes a plan - a ghost of the building - and the Builder raises it, piece by piece, paying every piece's cost out of your chests.

The Builder's Hammer

Crafted at a workbench from 6 wood and 4 stone. It has its own build menu; the vanilla hammer is untouched.

Its menu holds one entry per blueprint, plus vanilla's Repair entry. Repair is worth knowing about for a second reason: it is the one selection that draws no building on the cursor, so it is how you put the blue ghost away without swapping tools.

Writing a building down

Hold the Builder's Hammer, look at the building, and press B. Name it in the box that opens.

Whatever is joined to the piece under your crosshair comes with it, and nothing that merely stands nearby. The file is written and the hammer offers it straight away - no reload, no console.

The key is on the hint bar at the bottom of the screen, and is configurable: [Builder] CaptureKey in the config file.

Where blueprints live

One blueprint ships: a three-bed cabin, so the Builder has something to raise on the first day. The rest are yours to make. .blueprint and .vbuild files both work.

Laying a plan

Pick it from the hammer's menu and place it, or use inn.bp.place <name>.

A plan lands on the same sixteen angles vanilla uses, so everything you build into it afterwards lines up. A stake goes in the ground beside it - outside the building, in front of its door.

The stake is the site:

• Tap it to build as much of the plan as what you are carrying will pay for.
• Hold it to cancel the whole plan.
• Hovering it shows what has been delivered against the whole cost.

Laying the same plan over a building it has already raised plans only the gaps - which is the answer to a floor tile broken out of a finished house.

How the Builder raises it

Crafting stations first, because nothing else can be built without one in range, then from the ground up.

Materials go into the piece before any hammer is lifted, so a Builder pulled away by a raid leaves its timber in the wall rather than scattered on its corpse. It fills its pack rather than fetching one stack at a time, and raises everything within reach before taking a step.

Two Builders can share a site: one claims it, the other carries.

Anything it cannot get to without swimming is left for you.

When a plan will not move

The Construction tab says which it is:

Commands

inn.bp.capture, inn.bp.place, inn.bp.dump, inn.bp.measure, inn.bp.cleanup and inn.bp.mend - see Console commands.