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Preference pairs: pair sampling drops minority strata · case 04

pair sampling drops minority strata.

Member previewVariant 4 · 3 implementations · 6 checks per implementation

Case contract

Rows are [stratum,pair]. Return at most quota rows for each stratum, in original order; quota is nonnegative.

Why this case matters

A small deterministic preference-data transform makes pair semantics inspectable without a training framework.

One recorded failure

Sample boundary fixture

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

Boundary fixtureActualExpectedOutcome
quota per group[["a4", 1], ["a4", 2]][["a4", 1], ["a4", 2], ["b4", 4], ["b4", 5]]Failed

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This record includes three runnable implementations, regression fixtures, execution results, and source hashes.

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