intentumdiff-diff-expectations

The behavioral oracle for the IntentumDiff engine — a scenario catalogue that says, per diff scenario, exactly what the engine SHOULD produce (which changes, with which labels, and which change_groups are surfaced vs suppressed, and why). Use this whenever you implement, fix, port, or review engine behavior for a language/scenario, when you need the expected result for a test (Python acceptance OR Rust #[cfg(test)]), or when deciding "is this diff output correct?". This catalogue — not the Python `analysis/*` implementation — is the source of truth: Python is no longer the oracle. Every scenario here must be enforced by BOTH a Python acceptance assertion (via `SemanticDiffer`) and a Rust unit test. Read intentumdiff-language-profiles / -engine for the mechanism, and intentumdiff-dev-loop for the migrate-to-Rust workflow this oracle drives.