A promise can arrive before its reply.
Two requesters are waiting for a parcel. Their couriers must make the handoff, confirm it, and leave the spare alone—even when a reply gets lost and a request arrives again.
Exact recorded Rust habitats. Physical custody, acknowledgments and beacon service are checked separately. Scrubbing displays saved frames; your agent drives the local CLI.
Independent endpoints exchange two finite parcels, confirm custody and keep their services running.
Loading the recorded habitat…
A small promise with a complete history.
The reference courier begins at its destination, waits for a request, collects one parcel, and drops it at the depot. After observing empty cargo, it retains the physical receipt and acknowledges the handoff. A repeated request must not send it back for the spare.
This is a finite pair of one-shot commitments in one saved world. It does not establish a general messaging protocol, shared economy, or multiplayer service.
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