FA-99284 / Distributed training aggregation / Member archive
A late gradient from an older collective step is applied · case 04
A late gradient from an older collective step is applied.
Case contract
Given [step,worker,gradient] contributions and target step, return sum for exactly that step.
Why this case matters
A toy distributed-training contract makes replica and shard contribution rules explicit without claiming framework compatibility or performance.
One recorded failure
Sample boundary fixtureThis sample comes from the broken implementation of a controlled reproducer.
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| old step excluded | 412 | 12 | Failed |
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