Merge Lane Performance Analysis Last Three

Task 12503 · Done · Coder · created · updated

Analyze Merge Lane performance in the last 3 days and implement top 10 improvements

Outcome

Analyzed 3 days of the lane: merges take ~1 min, but 44% of base checks red. Shipped 10 fixes: CE/mirror stages in the lane's quick gate, brief/policy truth, sharper verdicts, no "gate" flakes, no "(unnamed)" conflicts. Quick gate + 481 tests green; PR #7698 queued. Memory: none applied.

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