FA-97888 / Dataset split isolation / Member archive
Dataset split: a group appears in multiple cross-validation folds · case 03
a group appears in multiple cross-validation folds.
Case contract
Rows [id,group]; assign sorted distinct groups round-robin to k folds and return [id,fold] in input order.
Why this case matters
This toy split allocator makes membership rules explicit for reproducible evaluation fixtures.
One recorded failure
Sample boundary fixtureThis sample comes from the broken implementation of a controlled reproducer.
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| lexical rotation | [["x", 0], ["y", 1]] | [["x", 1], ["y", 0]] | Failed |
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This record includes three runnable implementations, regression fixtures, execution results, and source hashes.
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