The pass used to hold the host at ~60% duty for the whole corpus window (a
fixed 100ms sleep between full-log folds). Rests are now proportional to the
measured work (at least a 25ms floor) at both granularities — between slices
and between sessions — capping the pass near 50% duty, and every 8s of
cumulative fold work the pass takes a logged 2s recovery pause and resumes on
its own (the issue's 'bounded, background, visibly paused' ask). Slice work is
billed exactly once across the two granularities, and every sleep wakes early
on abort so dispose never waits out a pause.
Pacing is injectable (BackfillPacing) for deterministic tests, mirroring the
cold-read gate's injectable reading; the sliced-fold suite moves to its own
spec file with the shared rig extracted to tests/host/helpers/backfill.ts.
What gets folded and the final cache rows are unchanged — only when the loop
breathes.
bowenliang123
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