A governed sense → route → gate → receipt loop. Each observation is routed (top-k MoE-style over flow compartments), passed through a two-key gate, and recorded as one append-only receipt. Conforms to the SHAPE of P1/P2/P4 — an engineering loop, not a proof.
Integrity receipts only. The gate decides ALLOW/DENY; it does not assert the decision is correct.
An append-only, hash-linked log: each link commits to the previous (prev_digest → digest). Editing, reordering, inserting, or deleting any step breaks the chain. This is the visibility/control story — integrity & ordering, never correctness.
Plain hash chain (not a signed/anchored ledger). Khipu = Conjecture 2; signing/anchoring is the platform's job.
Short-horizon trend of compartment count and mean flow from the live/sample series. Everything beyond the data is labeled PROJECTED — a linear extrapolation, never an invented number, never a guarantee.
Linear least-squares fit. The dashed PROJECTED segment is a projection only.
The real maritime/flow feeds powering yarqa. Each source is independently LIVE when reachable, else clearly SAMPLE / SIMULATED — with the source URL cited. One code path; the badge follows real reachability.
Attribution — Open-Meteo (CC BY 4.0); NOAA CO-OPS (U.S. public domain). License-clean public APIs only; no scraping.