Month: 2025-10 Overview: Implemented a user-facing transformation to convert InstanceNormalization to LayerNormalization by relocating the logic from the Canonicalize pass to the Decompose pass, and exposing it via a enable/disable flag. Updated API and tests to reflect the new location and flag semantics. This refactor provides business value by giving users control over normalization behavior and enabling optimization pathways, while simplifying maintenance of the pass pipeline. Key features delivered: - InstanceNorm → LayerNorm transformation moved from Canonicalize to Decompose, with a new enable/disable flag to control its activation. - API and test updates to align with the new pass location and flag semantics, ensuring consistent behavior across user flows. - End-to-end test adjustments to reflect the new decomposition path and invocation semantics. Major bugs fixed: - Stabilized end-to-end testing by correcting the decomposition pass invocation and ensuring correct use of the EmitONNXIR flag in tests, reducing flake and CI failures. Overall impact and accomplishments: - Provides business value by giving users explicit control over normalization behavior and enabling performance/compatibility optimization paths. - Improves code maintainability by consolidating normalization transformation logic into a single, reusable Decompose pass. Technologies/skills demonstrated: - Pass-based transformation design and refactoring, flag-driven feature toggles, API evolution, and test strategy (including e2e tests and test invocation flags).