Three fleet products. One question: is the behavior still the one you attested to?

Every governed system carries a signed baseline — a drift bound it must live inside. The solid line is governed behavior; the faint trace is where the raw system was headed. When they part at the rail, that gap is risk being held — live.

Drift bounds · live

composite drift index · 8 Hz trace · solid = governed · faint dash = ungoverned trajectory · band = attested ±2σ

Ambient Clinical Scribe —baseline b-2291 · held 0 in bounds

Prior-Auth Copilot —baseline b-2304 · held 0 re-attested

Claims Triage Agent —baseline b-2287 · held 0 in bounds

Excursion & attestation ledger

every bound event is a signed receipt · cause per drift-state classifier

Event	UTC	System	Magnitude	Cause · classifier	Resolution	Receipt

Drift fingerprint · now

|z| vs attested bound, per dimension · ▲ = above bound

shade ∝ |z| (0 → 3σ) · values are current-window z-scores against each dimension's attested bound

Distribution shift · grounding score

last 24 h vs attested baseline · PSI flagged ≥ 0.20

Dimension instruments · fleet-wide

72 h · shaded band = attested envelope

Posture · 7 days

96.2%

Time in bounds · fleet

2 / 1 open

Excursions

4.2 min

Mean time to detect

14 · 41,203 receipts

Baselines attested