assignment-matrix-test

Property-test an assignment matrix for derangement constraints by running deterministic seeded tests that verify every row is a permutation and consecutive rounds never assign the same user to the same item. This Skill validates a 9-round, 9×N matrix across N values from 2 to 8.

An assignment matrix should enforce four invariants: exactly 9 rounds, a 9×N shape, row-wise permutation of user IDs, and per-round derangement to prevent consecutive duplicate assignments. Complete column coverage is also verified.

Validate derangement in a Convex assignment matrix by integrating tests at tests/convex/assignmentMatrix.property.test.ts and using the generateAssignmentMatrix function from convex/lib/assignmentMatrix.ts to check permutation and derangement constraints.

Yes, the property test covers all supported matrix sizes for the 9-round assignment by iterating N values from 2 through 8, ensuring the 9×N matrix maintains derangement and row-wise permutation invariants across every configuration.

An assignment matrix test fails on consecutive rounds when the derangement constraint is violated, meaning the same user is assigned to the same poem in back-to-back rounds. Use deterministic seeded property testing to isolate the failing seed and catch the regression.

Yes, you can use deterministic seeded testing to catch assignment matrix regressions by running property tests across fixed seeds, which reliably reproduce failures in the derangement or permutation invariants of the 9×N matrix.