The loop reads its clock at the top and ft-hands' files later in the pass.
A frame written in between has publish_ns after tnow, and the unsigned
"now - publish_ns" in HandsInRoom::Live wrapped round: the feed read as
stale for that one pass, both sides went "off", and the "hands" word to
ft-screens flickered to "off off" and back. 2026-10-10 20:30-20:37: 24
flickers in 7 minutes, each with ft-hands publishing at full rate (pinches
logged at the same moments), each ending ft-screens' holds and the ray.
feedage.h: AgeNs/Fresh, age 0 for a frame from after "now". Live and the
gestures check that ends holds ("hand tracking stopped") use them.
pointer/tests/feedage-test.cpp replays the loop against 30, 15 and 1 Hz
publishing: the old check calls 28-2408 passes stale, the new one none.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
