Phase 2: Constraint Validation
- 2 plans in 1 wave (parallel)
- Both plans autonomous (no checkpoints)
Plan 02-01: Migrate 13 XCTest tests to Swift Testing
Plan 02-02: Add edge case tests and document constraint API
Note: ItineraryConstraints is already fully implemented.
This phase verifies and standardizes tests.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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