PSP, the Postcapital Space Protocol, is the economic grammar that lets a network define, verify, and compute its own value: distributed economic computation, as a protocol.
PSP realizes the distributed partitioned ledger with programmable semantics. Its primitives: Units of Utility (UU), the multi-dimensional value metric each network defines for itself; Stake, earned through contribution and non-tradable; Utility Credits with Performance Indexes, the credit and commitment instruments; Reciprocal Stake Links, the mutual-investment relationship between spaces; and mirror accounting, every entry hitting the pairwise books of its counterparties. Correctness is verified multilaterally by staked participants, not by a central authority and not by one global record.
An economic space is any economy expressed as a configuration of the accounting protocol. Each space authors its own units, metrics, and definition of surplus, and stays interoperable with every other space through the shared accounting grammar. Plurality without collapse is the design goal, not a side effect.
Lineage, stated plainly. ESP, the Economic Space Protocol, is the research-era name from the book (Protocols for Postcapitalist Expression, 2023) and the earlier corpus; it is folded into PSP, and any ESP in older materials reads as PSP. The Postcapitalist Space Drive (PSD), the early runtime concept, likewise folds into the current picture of the economic space as runtime. The old ambition sometimes attached to ESP — hosting capital-logic and postcapital-logic inside one space — is not a pitch feature; the current architecture handles that boundary at the bridge, between spaces.
Status, honestly: PSP is a formal design at spec v4, computationally grounded, with the bridge mechanism formalized and simulation-verified separately. The substrate's economic instrumentation, metering verified state-changes into uECSA, is what the seed round builds.
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