This is a living architecture reference. The foundational assumptions below are stated openly so a reader can see the frame the brief is built on — and so future entries can record when the market moves against or with them. The body is not rewritten unless one of these baseline assumptions breaks; deltas accrete here with citations.
BASELINE · U.00 · v1.0
Foundational assumptions of this brief
2026-07-06
Brief 021 rests on three assumptions. Each is durable rather than tied to a product cycle; if one is invalidated by the market, this log is where it will be recorded. Severity legend: ASSUMPTION a stated premise, WATCH a premise we expect to test over time.
PREMISE
WHAT WE ASSUME
STATUS
Data-layer-first
The data foundation, not the model, decides whether AI ships. Models are commoditizing; the failures documented in §1 cluster at the data layer. We assume this holds as models improve — better models make an ungoverned estate more dangerous, not less.
ASSUMPTION
Backed by [R.01]–[R.05]
Vendor-agnostic
The model layer stays interchangeable; the foundation is the durable investment. The largest vendors converged on the same pattern (§3), which means it can be delivered without lock-in. We assume the winning model keeps changing — so a foundation that doesn't care which model sits on top is the rational default.
WATCH
Re-test as vendors bundle
Federate-in-place
Federating in place beats rip-and-replace for AI readiness. Findability does not require centralization; a catalog plus one governed gateway delivers the pattern while sources stay where they are. We assume migration is the exception, justified case by case — not the default first move.
ASSUMPTION
Aligned to [R.06], [R.07]
EDITOR’S NOTE
Brief 021 (Series III, issued 2026-07-06) is the baseline edition. When the market ships something that pressures one of the three assumptions above — a bundled vendor foundation, a shift in the migration economics, a change in the failure data — we log the delta here rather than silently rewrite the body. Read the assumptions first; they are the lens for everything above.