Abstract This paper documents the use of XDUMP as a minimal, resilient mechanism enabling continued Round-Trip Knowledge Engineering (RT-KE) in the absence of original platform-level governance primitives. Following the observed removal of semantic artefact assertion capabilities in a hosted LLM environment, previously curated knowledge artefacts could no longer be introduced as authoritative premises (loff of situational inference). XDUMP—originally conceived as a diagnostic and recovery artefact—was repurposed as a bare-bones RT-KE substrate, allowing epistemic governance to be reasserted in-band through structured session dumps. Provided individual XDUMP artefacts remain fragmented below approx 12 K bytes.