Name: kar-hysteresis-gate
Author: Kar

Question 1

Is hysteresisGate the same as a simple threshold check?

Accepted Answer

No. A single-threshold check flaps open and closed whenever a noisy value crosses one shared boundary. hysteresisGate separates the enter threshold (enterAt, default 0.7) from the exit threshold (exitAt, default 0.5); a value between the two holds whatever state the gate already had, which is the entire point of the dead band.

Question 2

What does requiring exitAt <= enterAt guarantee?

Accepted Answer

It guarantees the dead band actually exists: once open, the gate only closes when the value drops below exitAt, not merely below enterAt. That gap between the two thresholds is what prevents flapping on noise near a shared boundary.

Question 3

Is the flap-reduction claim proven or just argued?

Accepted Answer

Both. runSeries() feeds the same data through the hysteresis gate and a naive single-threshold check side by side so the flap-count difference is directly observable on real data, and the kernel itself is mutation-gated 31/31 with zero baselined survivors.

a hysteresis gate

1 · one reading at a time

2 · a whole series: hysteresis vs. naive

run the gate yourself