October 2025 performance summary for OpenAPITools/openapi-diff. Delivered a key feature to detect backward incompatibility due to OpenAPI schema pattern changes. Introduced a new enum value SCHEMA_PATTERN_CHANGED and updated the ChangedPattern class to mark pattern changes as incompatible. Added a dedicated test case and resource file to validate the behavior. The work was merged via PR #848 (commit 6265628c295cb0764177c7c307e5cc7e3ae66705). No major bugs fixed this month in this repository. Overall impact: strengthens compatibility guarantees for downstream clients by automatically flagging risky schema pattern evolutions, reducing production breakages. Technologies/skills demonstrated: Java implementation, test-driven development, enum extension, test/resource management, PR workflow, and open-source contribution practices.