Abstract Large language models and other probabilistic systems are increasingly used as collaborators in knowledge-intensive work. While these systems can generate fluent and contextually rich outputs, they are inherently stateless, non-authoritative, and prone to subtle forms of drift, rediscovery, and silent reinterpretation. These failure modes are not primarily errors of intelligence or capability; they are failures of knowledge governance. This paper introduces Cognitive Memoisation (CM) and presents the first public articulation of CM-2, a governance-oriented framework for human–AI collaboration. Using the metaphor of collaborative shipbuilding, the paper illustrates why complex work fails when assumptions, context, and prior agreements are not explicitly externalised and governed. CM-2 formalises the separation between continuity and authority by defining memoised objects for grounded material, contextual attachments for governing facts, bounded Universes of Discourse for parallel reasoning, and an explicit human-initiated promotion boundary for durable knowledge. Rather than proposing new model architectures or vendor-dependent memory mechanisms, CM-2 focuses on disciplined externalisation, idempotent identity, and explicit human authority as the foundations for reliable knowledge work. The paper positions CM-1 as an immediately applicable practice, while CM-2 establishes the normative structure required for interoperable tooling and future implementations. Scope Invariant (normative CM-2) S1. Binding Layer In CM-2, all Appendices explicitly marked “Normative” constitute the binding protocol. They define the complete and exclusive set of conformance requirements for any CM-2 implementation. S2. Non-Binding Material All other sections of CM-2 — including introductions, metaphors, examples, figures, and explanatory text — are informative only and MUST NOT be used to assert or deny conformance. S3. Precedence If any conflict exists between the main body and a Normative Appendix, the Normative Appendix prevails. S4. Portability Guarantee Any claim of CM-2 compliance that does not fully implement the Normative Appendices is invalid, regardless of partial or informal alignment with the paper.----This is a non-peer reviewed protcol paper for Knowledge interaction and exchange.Renamed and supersedes "Cognitive Memoisation (CM-2) for Governing Knowledge in Human-AI Collaboration"