Month: 2026-03 Key features delivered: - Circuit Breaker Event Notification Enhancement with Adapter Context and Resource Stub Compatibility: The circuit breaker now notifies state transition events (open, half_open, closed) with proper scope and adapter context, enabling more granular metrics and cross-adapter analysis. UnprotectedResource stubs were updated to accept new signatures (keyword splat) for compatibility. Major bugs fixed: - Fixed missing context in circuit breaker event notifications by threading scope and adapter through #acquire to all state changes, improving observability and preventing misleading metrics. Updated stubs to remain compatible with new event flow. Overall impact and accomplishments: - Improved observability and metrics granularity across adapters, enabling targeted analysis and faster troubleshooting for circuit breaker events. - Enhanced compatibility and reduced integration risk for downstream adapters with the updated event context signature. - Strengthened engineering discipline around signature changes and resource stubs, setting a foundation for future improvements in adapter-aware telemetry. Technologies/skills demonstrated: - Ruby context propagation and keyword arguments (splat) handling - Circuit breaker patterns and event-focused telemetry - Adapter-aware instrumentation and cross-repo collaboration within Shopify/semian - Commitment-level traceability with specific PR commit reference