FA-99414 / Embedding vector normalization / Member archive
Feature standardization divides by variance · case 04
Feature standardization divides by variance.
Case contract
Standardize each column with population mean and standard deviation; zero-variance columns become zeros.
Why this case matters
A small embedding preparation contract can be checked without a model or retrieval system.
One recorded failure
Sample boundary fixtureThis sample comes from the broken implementation of a controlled reproducer.
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| offset feature | [[-1.0, -0.5], [1.0, 0.5]] | [[-1.0, -1.0], [1.0, 1.0]] | Failed |
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