March 2026 focused on SDK6 compatibility and caching stability in the Firely .NET SDK. Delivered a critical compatibility fix by reverting the Lazy<ModelInspector> usage in ModelInfo.cs, ensuring correct caching behavior since ModelInspector.ForAssembly() relies on a ConcurrentDictionary. This prevents version-mixing issues and preserves performance characteristics under SDK6. The change is tracked under commit cc797048476b11af96d1636e30d8bdb41c721937 with PR discussion in PR #3463, and CI-related adjustments were included in this sweep (azure-pipelines.yml).

February 2026 monthly summary focused on delivering targeted features and hygiene improvements across the Firely repos, driving business value through reduced risk, faster onboarding, and clearer developer guidance. Key outcomes include improved dependency management in firely-net-sdk, standardized development workflow templates and CI/CD scaffolding, and enhanced Copilot documentation formatting in firely-cql-sdk.

Monthly summary for 2026-01 - FirelyTeam/firely-net-sdk: Delivered validation UX improvements, API simplifications, and release-ready updates that drive faster development cycles and clearer error signaling for customers. Focused on enhancing feedback during code validation, simplifying API usage for PocoNode, and ensuring robust release processes.

December 2025 monthly summary for FirelyTeam/firely-net-sdk: Delivered API alignment and stability improvements across Terminology Service, build tooling, and error handling. Key features include Terminology Service Enhancements with refactored Lookup, new validation for code parameters, duplicate checks, and API cleanup to align with FHIR R6; Build and Compatibility Maintenance to stabilize compilation, refine compatibility suppression generation, remove obsolete entries, and upgrade SDK versions; and the introduction of a Shared Transaction Error Messages file to standardize error handling across transaction services. Impact includes reduced runtime errors, smoother evolution toward FHIR R6, and more reliable CI that supports future upgrades. Technologies/skills demonstrated include C#, .NET, FHIR R6 alignment, code refactoring, build tooling and SDK version management, and improved error handling patterns.

November 2025 — FirelyNet SDK: focused on stability and test reliability. Delivered robustness for TerminologyService routing to tolerate empty settings, removed obsolete tests, and corrected a syntax issue in PreferredValueSets. Improved SnapshotGenerator test assertions to differentiate empty vs non-empty outcomes. Result: reduced production runtime risk, more stable CI, and faster iteration for feature work.

October 2025 monthly summary for FirelyTeam/firely-cql-sdk focused on SDK6 readiness and property model alignment. Upgraded to latest pre-release SDK6 and updated FhirModelPropertyInfo to align value retrieval and assignment with the new SDK semantics. These changes prepare the codebase for SDK6 features and reduce migration risk for downstream consumers.

Monthly summary for 2025-08 focusing on business value and technical achievements across two repositories (FirelyTeam/firely-cql-sdk and FirelyTeam/firely-net-sdk).

July 2025 milestone focused on delivering robust temporal logic enhancements in the Firely CQL SDK, with substantial refactors, improved translation and interval handling, and comprehensive testing to improve reliability, performance, and business value of temporal queries.

June 2025: Focused on enabling FHIR R6 readiness, enhancing cross-version interoperability, and improving data integrity and test quality in Firely's .NET SDK. Delivered: R6 scaffolding and project files to accelerate adoption; code generation re-run across R4/R4B/R5/STU3 with updated version strings; expanded search parameter definitions across resources to improve query capabilities; R6 release visibility configured to enable cross-project usage; and a critical data integrity fix to StructureDefinition snapshots by clearing contentRef when copying children. Additionally, the team restored the QuestionnaireItemType enum member and preserved STU3 invoice grouping codes to maintain correctness. These changes reduce maintenance overhead, speed R6 rollout, and improve interoperability and data consistency across FHIR versions.

In May 2025, delivered DataRequirements aggregation accuracy improvements in FirelyTeam/firely-cql-sdk. The work included refactoring the DataRequirementsAnalyzer.Combine method to improve distinctness logic across components and the addition of a new test case for simplifying DataRequirements. These changes increase the accuracy of aggregated requirements, reduce edge-case misclassifications, and improve reliability for downstream rule evaluation. Implemented in commit 024c91c71c04beeda866320b2cc0727fadc2989f (Changes after PR). Technologies demonstrated include .NET/C#, DataRequirementsAnalyzer, and unit testing (test-driven development).

Concise monthly summary for 2025-03 focusing on key accomplishments across FirelyTeam/firely-cql-sdk. Highlights include a ValueSet handling overhaul with the introduction of ValueSetSource, improved loading/expansion, caching, and hashing of identifiers and codes; robustness improvements in ValueSetSource initialization; and internal cleanup plus documentation updates. The work enhances reliability, performance, and maintainability, enabling faster feature development and reduced risk in terminology handling.

February 2025 — Focused on stabilizing FHIRPath evaluation in the Firely-net-sdk. Delivered a robust fix for null propagation with empty primitive values to prevent errors and ensure consistent behavior across scenarios. This improvement reduces runtime issues for clients evaluating expressions involving empty primitives and enhances reliability in production workflows. Technologies: C#, .NET, FHIRPath; testing and code review emphasized for robustness.

January 2025 monthly summary for FirelyTeam/firely-net-sdk: Implemented FHIR Terminology Service enhancements including inline ValueSet validation, explicit ValueSet versioning, and robust parameter validation. These changes improve validation accuracy, support for complex validation scenarios, and version-based resolution for Expand and ValueSet validation, delivering tangible business value and stronger interoperability.