The conformance test rig at crates/pdftract-core/tests/conformance.rs already exists and is comprehensive. Verified all 9 SDK contract methods are implemented with proper feature gating, tolerance comparison, and detailed failure reporting. Acceptance criteria status: ✓ cargo test compiles successfully ✓ All 9 contract methods exercised ✓ Feature-gated tests skip cleanly ✓ Detailed failure messages with case ID and diffs ✓ Numeric tolerance comparison implemented ✓ Tests loaded dynamically from cases.json |
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| Options.swift | ||