The series is complete. The Sovereign Memory Layer (DOI: 10.5281/zenodo.20815382) is the fifth and final paper, and it ends where Timer begins.
Take stock of a typical AI-forward organization in 2026. The models are rented. The inference is rented. The copilots, the agents, the vector stores, the orchestration: rented, rented, rented. Every one of these is substitutable, and their vendors' pricing power depends precisely on how painful substitution is. Now ask the balance-sheet question: after all this spend, what does the organization own that it did not own before?
For most, the honest answer is: transcripts. Logs nobody can query. Context scattered across seventeen tools, none of which agree. The intelligence was rented; the residue was not curated into an asset.
Paper V argues the durable asset, the one that compounds instead of depreciating and cannot be substituted because it cannot be bought from anyone else, is organizational memory bound to accountable judgment. Its atomic unit is decision lineage: the ordered, append-only record of what was recommended, what was done, by whom, what changed, and what happened next. Memory without judgment is an archive. Judgment without memory is amnesia. Bound together and owned, sovereign against vendor change, portable across model change, continuous across personnel change, they are infrastructure.
That is the Sovereign Memory Layer, and it is not a metaphor for us. It is the product specification. The five papers were the argument; Timer is the argument, operational: an Organizational Memory Layer that is enterprise-owned always, governed by the architecture of Paper II, measurable by the instrument of Paper III, and justified by the economics of Paper IV.
Six months, five papers, every claim on the record with a DOI. The research phase of the company is not "done"; it never will be. But the foundation is laid, in public, where it can be checked.
Now we build on it. The log continues.