Why can a probe leave before a building is finished?

A probe can start a building warp-in and head straight back to mining. The structure is still taking shape, but its worker has left. Who finishes the job?

The original StarCraft guide answers by moving the job elsewhere: the building has already been manufactured offworld. The probe prepares its arrival point rather than staying to assemble it on site.

The probe portrait from Blizzard’s original StarCraft guide, shown at its native size. © Blizzard Entertainment. Image source ↗

A receiving site, not an assembly line

Blizzard’s original Protoss strategy guide describes structures manufactured on the Protoss homeworld. A probe places a special warp beacon, providing an anchor and entry point for the gate that brings a functional building to the colony.

That changes what the unfinished-looking site means. In this account, a building taking shape is arriving from elsewhere. Reading the animation as a worker fitting parts together makes the probe’s departure look like an abandoned construction job.

The guide lets the probe move on once the gate is open: it can mine or set another anchor. The Probe entry’s Construction section makes the practical consequence explicit. With enough resources, one probe can start several warp-ins without waiting beside each building for completion.

The same entry compares the other workers. A Terran SCV remains occupied while erecting a structure; a zerg drone transforms into one. The probe establishes the connection for a building’s arrival and goes to its next task. A construction order assigns three quite different jobs.

An original StarCraft screenshot of several warp-ins beside completed buildings. It does not depict the beacon’s internal mechanism. © Blizzard Entertainment. Image source ↗

The probe leaves; the power connection still matters

A completed anchoring job does not make the arriving structure self-sufficient. The strategy guide’s Proper Pylon Support section gives pylons a separate role: supplying nearby buildings and warp gates with psionic power. Buildings that depend on that connection shut down when they lose it and resume when it is restored.

The beacon provides an entry point. A pylon supplies power to the surrounding facilities. Finishing the probe’s short task does not finish the pylon’s continuing one.

The homeworld supply account belongs to the original game’s guide. It does not establish where every structure in later eras is manufactured, or explain the resource bill for receiving a building made elsewhere.

Zerg construction takes a different route, with a worker becoming part of the colony’s structure. Follow that division of labor in why zerg still need buildings when their units come from larvae.