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P137 — AIEP — Persistent World Model Protocol

Publication Date: 2026-04-12 Status: Open Source Prior Art Disclosure Licence: Apache License 2.0 Author/Organisation: Phatfella Ltd Schema: AIEP_OS_SPEC_TEMPLATE v1.0.1 — https://aiep.dev/schemas/aiep-os-spec-template/v1.0.1

Field of the Invention

[0001] The disclosure relates to persistent state management systems for AI reasoning within computing environments.

[0002] More particularly, the disclosure concerns a persistent world model protocol for use within an Architected Instruction and Evidence Protocol (AIEP) system, enabling an evidence-bound representation of external world state to be maintained across reasoning sessions, updated deterministically from new evidence artefacts, and queried without modifying the persisted state.

Framework Context

[0003] This invention operates within an Architected Instruction and Evidence Protocol (AIEP) environment as defined in United Kingdom patent application number GB2519711.2, filed 20 November 2025, the entire contents of which are incorporated herein by reference.

[0004] The present invention extends the dual-ledger memory substrate defined in P80, the entity state registry defined in P201, and the temporal event graph defined in P202 while remaining independently implementable as described herein.

Background

[0005] AI reasoning systems operating over extended time horizons require a persistent representation of world state that accumulates evidence across sessions. Without a governed update mechanism, world models develop stale records, undisclosed overrides, and non-reproducible state transitions.

[0006] There exists a need for a deterministic persistent world model update mechanism that binds each state transition to the evidence artefact causing it, records all transitions in an append-only log, and enables state at any prior point to be reconstructed from the log without inference.

Summary of the Disclosure

[0007] A computer-implemented persistent world model protocol comprises: maintaining a WorldModelStore as an append-only log of WorldModelStateRecord entries; on receipt of a new evidence artefact, evaluating whether any entity state in the WorldModelStore requires update; if an update is warranted, computing a WorldModelTransitionHash as H(prior_state_hash || evidence_artefact_hash || transition_rule_id || timestamp); appending a WorldModelStateRecord containing entity identifier, prior state hash, new state, evidence artefact hash, transition rule identifier, and WorldModelTransitionHash; and returning the current world model state as a versioned, hash-bound snapshot.

[0008] Queries against the world model are read-only and do not modify the WorldModelStore. Point-in-time state reconstruction is supported by replaying WorldModelStateRecord entries up to the target timestamp.

[0009] The technical effect is modification of computing system behaviour by enforcing evidence-bound deterministic world model maintenance, enabling reproducible world state reconstruction at any prior point without inference or interpolation.

Claims

[0010] A computer-implemented method for persistent world model maintenance comprising: maintaining a WorldModelStore as an append-only log; on receipt of evidence artefacts, evaluating required state transitions; computing a WorldModelTransitionHash for each transition; appending a WorldModelStateRecord binding transition evidence, rule, and hash; and supporting point-in-time state reconstruction by log replay.

[0011] The method of claim 1 wherein world model queries are read-only and do not modify the WorldModelStore.

[0012] The method of claim 1 wherein state reconstruction is performed exclusively by replaying WorldModelStateRecord entries without inference.

[0013] A system for persistent world model maintenance comprising one or more processors and a non-transitory computer-readable medium storing instructions to execute the method of any preceding claim.