nx_evidence_beat.nx

nx_evidence_beat.nx -- THE CADENCE. Closes the seq1433 half that turns this workstream from a one-shot into an actual loop. ★WHY THIS IS THE KEYSTONE, NOT A CHORE. Everything built this session expires on purpose: evstamps carry an epoch and are refused past the TTL, bite records likewise. That expiry is the whole point -- a verdict that outlives its evidence is the defect this workstream opened by fixing. But expiry without RENEWAL is just a slower way to reach zero: within one TTL every domain silently falls back to UNPROVEN and the board returns to exactly the state it started in. A measurement you never repeat is a measurement you will eventually be lying about. WHAT IT DOES, per invocation: for each domain declaring executable evidence (knowledge/compare/<d>.gates) * if its evstamp is missing or older than the REFRESH threshold -> re-run nx_swcompare_evidence <d> * if any of its declared gates lacks a fresh bite record -> re-run nx_bite_sweep <d> ★REFRESH AT HALF THE TTL, not at expiry. Renewing only once a record has already died guarantees a window in which the board reads UNPROVEN for domains that are fine -- the instrument would manufacture its own false negatives on a timer. Half-life renewal means a single missed beat is survivable. ★BOUNDED WORK BY CONSTRUCTION. Each refresh forks real gates and, for a sweep, rebuilds source repeatedly; an unbounded beat would run for hours and get killed mid-flight, leaving a mutated tree behind. maxwork caps the number of refreshes per invocation and the beat reports what it DEFERRED rather than silently truncating -- a cadence that hides its own backlog is how "green" drifts away from "current". usage: nx_evidence_beat [maxwork] [--dry] (CWD = nxc2 root) exit 0 = nothing overdue, or all attempted work succeeded · 1 = a refresh failed · 2 = usage license_tier: ORIGINAL