During December 2025, Kyle Havrilesko focused on stabilizing canvas rasterization in the InvokeAI repository, addressing issues with regional guidance mask cache invalidation when the canvas bounding box changed. Using TypeScript and front end development skills, Kyle engineered a solution that invalidated per-region adapter caches on bbox edits, ensuring accurate rasterization and preventing stale data during rapid, back-to-back canvas generations. By coordinating cache invalidation with the rasterization pipeline, Kyle resolved a race condition in canvas state handling, improving reliability and consistency for users. The work demonstrated careful attention to edge cases and was reviewed collaboratively to maintain high code quality.