Cross-grammar discrimination experiment (exp-002) + rotated-sampler fix#4
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- generator/fragments.py: warp framed directly onto the window — zero-size crops impossible at any rotation (SI-017 gap 2 resolved, regression tested) - battery/cross.py: four-arm sweep (001 fragments, 002 fragments, WB gain sweep, mutual impostors incl. nine-ink hue-rotated grid impostor) - experiments/exp-002-cross-grammar/: manifest, 1269-row CSV, 4 charts, report - headline: 0/885 cross-family fragments reach candidate; relationship-path colour holds 0.59-0.81 under casts that collapse absolute matching to 0.02-0.13, and recovers the applied gain; structure-only impostor scores ~0.003 (peak discounting confirmed); SI-022 records the same-family distance gap - 18 new tests; 125 total green
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Replaces #3, which GitHub auto-closed when its base branch (
feat/recogniser-002) was deleted by the #2 merge. The branch is rebased onto main; the diff is identical to what #3's green CI run tested. Full description and headline results in #3.battery/cross.py: 001×002 cross-scoring sweep, white-balance gain sweep, mutual impostors.experiments/exp-002-cross-grammar/: manifest, 1269-row CSV, 4 charts, report.