FA-98907 / Gradient accumulation weighting / Member archive
Resumed accumulation restores the numerator but loses count · case 02
Resumed accumulation restores the numerator but loses count.
Case contract
A checkpoint stores [sum,count]. Resume by adding the incoming sum and count exactly once to the saved values.
Why this case matters
A deterministic toy model isolates one local accumulation contract.
One recorded failure
Sample boundary fixtureThis sample comes from the broken implementation of a controlled reproducer.
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| resume two steps | [28, 6] | [28, 8] | Failed |
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