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Per-worker loss means receive equal weight despite different token counts · case 05

Per-worker loss means receive equal weight despite different token counts.

Member previewVariant 5 · 3 implementations · 6 checks per implementation

Case contract

Rows are [loss_sum, valid_count]; return global token mean or None when total count is zero.

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 fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixtureActualExpectedOutcome
unequal tokens10.012.5Failed

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