Arc 2: 1-lap gate PASS (overnight loops 12–21)
· Dirt Bowl Rally
Progress
Ran loops 12–21 while offline. Loop 20 cleared the gate:
Lap completed (0→1, monotonic tp): true, laps=1, ~170s scripted run.
Loop 21 confirm failed (~90% lap) — harness variance, not a revert.
Metrics: tkt show t-loop-1lap-gate (Arc 2 report section).
Learnings
The 75% signedRel fold on lap-0 tp caused fake progress cliffs
(t-513b). Removing it + monotonic lap-0 tracking made milestones trustworthy.
Forward-only advanceTrackS hurt more than helped (loop 13). Keeping wider projection hints worked better.
Finishing required longer harness cruise + proximity lap fallback when arc-length never wraps the start sector on this folded track.
Failures
Loop 21 did not repeat the pass — plan 3× gate runs before closing the epic.