July 2026 monthly summary for RevenueCat/purchases-js focusing on business value and solid technical delivery. Key features delivered: - Implemented forwarding of funnel URL parameters during checkout to improve attribution tracking. Added urlParameters to the internal WorkflowPurchaseContext and sent them as url_parameters to the backend at checkout start, enabling server-side funnel analytics. End-to-end propagation through Web Billing and Paddle into /rcbilling/v1/checkout/start. - Maintained guarded serialization and optional field behavior to keep changes additive and low risk. Major bugs fixed: - No major defects reported within this scope; work centered on feature delivery and test coverage. Overall impact and accomplishments: - Improved attribution accuracy and downstream analytics capabilities for marketing ROI, by enabling funnel param propagation through checkout events. - Strengthened test coverage to verify both forwarding and omission of parameters, reducing risk of data leakage or incorrect analytics. - Prepared the groundwork for enhanced analytics pipelines with minimal disruption to existing auth/payment flows. Technologies/skills demonstrated: - JavaScript/TypeScript development, API integration with /rcbilling/v1/checkout/start, and end-to-end data flow through Paddle and Web Billing. - Backend telemetry/analytics plumbing through frontend changes, with robust test coverage and guarded serialization.