FA-99034 / Optimizer update state / Member archive
Bias parameter receives unintended weight decay · case 04
Bias parameter receives unintended weight decay.
Case contract
Records [role,p,g], lr=1, wd=.5; p_next=p-g-wd*p only for role weight.
Why this case matters
Optimizer implementations must associate each parameter with its own mathematically specified update state.
One recorded failure
Sample boundary fixtureThis sample comes from the broken implementation of a controlled reproducer.
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| weight and bias | [["weight", 1.0], ["bias", 1.0]] | [["weight", 1], ["bias", 3]] | Failed |
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