Harness-as-Assurance · Triodian

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Your certificate has a half-life. This is the renewal.

Continuous per-constraint re-validation against pre-registered floors, with attested loss-of-warrant events and a graded fallback that never leaves a constraint ungoverned.

Talk to us about your constraint set The fallback ladder ↓

What the harness runs

Eight tests, each gated at a pre-registered floor.

Separation / AUC
Operating point
Monotonicity
Beats-baseline
Distribution shift
Concept-validity gate
Arbitration
Multiplicity

Each gated at a pre-registered per-domain floor recorded in the traceability matrix.

Renewal triggers

Policy, not discretion.

Model or embedding change

A new model or embedding invalidates the prior calibration by construction.

Measured distribution shift

Detected by a delay-optimal change detector, CUSUM / Shiryaev-Roberts, minimising detection delay at a stated false-alarm rate.

Fixed calendar interval

A scheduled re-validation regardless of observed change.

Whichever comes first.

The fallback ladder

Assurance tier degrades. Enforcement never does.

01Lane demotion
02Reduced-lane SSVD
03Mode B rules mode

The account never loses enforcement, only assurance tier, and each rung down is a trigger to re-engage. The bottom rung is not a failure state: it is the site's Mode B, deterministic, decidable, and still enforced.

A competitor's threshold has one response to drift, to be wrong.

Weighted conformal

Episodic / step-change drift, bounded coverage gap.

Adaptive conformal

Continuous drift, long-run coverage.

The attested run-record and provenance ledger the harness writes to is the pinpole-proven lifecycle, carrying validation evidence instead of simulation runs. pinpole.cloud →   Status legend →

The honest boundary

Both drift mechanisms preserve a coverage guarantee with a bounded gap; they do not restore the original bound, and a large enough gap is itself a demotion trigger. Demotion is the fallback, not the first response.

Rule 7 for the detector itself, a loss of warrant is an attested, visible event, never a silent decay. The eight rules →

Talk to us about your constraint set.

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PACE Certified Miss-Rate ASC Enforcement configurations