February 2026 performance snapshot for OpenRailAssociation/osrd: focused on delivering stability, reliability, and fidelity across core simulation features and deployment pipelines. Key outcomes include a critical fix to train projection path accuracy, stabilized CI/CD and dependency management, and robust Docker-based front-end deployment improvements. These efforts reduce release risk, improve demo credibility, and enable faster, more reliable iterations with customers and internal stakeholders.

January 2026 Highlights for OpenRailAssociation/osrd: A foundational Kotlin Multiplatform (osrd-mp) migration was executed to position the project for cross-target train simulation. Key core components were migrated to Kotlin (e.g., IntegrationStep, Action, Distance, Direction, Endpoint) and all related infrastructure moved toward a multiplatform architecture, establishing the cornerstone for the new train simulation module. Major features and architectural optimizations delivered this month: - Core Kotlinization and osrd-mp groundwork: IntegrationStep, Action, Distance, Direction/Endpoint migrated to Kotlin and aligned with the osrd-mp module boundary to enable cross-platform builds and faster feature iteration. - DistanceRangeMap and core migrations for KMP readiness: removed BiFunction usage, renamed offsets to PhysicsPath, introduced in-house PriorityQueue, and moved essential core components to osrd-mp; extensive test and Kotlinization work to smooth the transition. - EtcsBrakeParams (moshi-free) added to bridge Kotlin Multiplatform with existing etcs brake logic, enabling PhysicsRollingStock to move toward KMP-based workflows. - Editoast improvements for time/conflict handling: refined conflict processing to avoid pulling schedules during conflicts, updated endpoints, and aligned track-occupancy tests for reliability. - Stability, tests and operational fixes: addressed PathItemCache false negatives, refined type usage for effort curve parsing, and fixed docker-compose osrdyne host configuration to ensure reliable local deployments. Overall impact: this work de-risks the upcoming multiplatform ship by consolidating core components under osrd-mp, accelerates the migration of simulation modules, improves test reliability, and strengthens the business value through faster, cross-platform development and more robust conflict/occupancy modeling.

December 2025 contributions to OpenRailAssociation/osrd focused on strengthening train simulation reliability and improving developer/docs UX. Key deliveries include enforcing path adherence in simulation results, gating invalid trains from endpoints to improve data integrity and occupancy calculations, and enriching mock data and timing fields for stable reports. Additionally, API documentation and debugging UX for simulation were improved with clearer differences between report types, explicit handling of excluded trains, and enhanced distance formatting in the debugger. These changes, across Kotlin and TypeScript components, delivered measurable business value by increasing reliability of simulation outputs, simplifying integration, and reducing debugging effort.

November 2025 delivered foundational cross-platform progress for OpenRailAssociation/osrd with Kotlin Multiplatform. A new multiplatform Gradle project (osrd-mp) was introduced to host the Train Simulation module, enabling JVM and native targets. The build was updated to Kotlin DSL (build.gradle.kts) and dependencies were aligned for KMP development, with enhanced formatting and checks (Spotless) to maintain code quality across targets. While there were no customer-facing defect closures this month, these changes establish a solid cross-platform foundation, reduce duplication, and accelerate future feature delivery by enabling shared code and tooling.

October 2025 monthly summary for OpenRailAssociation/osrd-website: Focused on enriching the railway glossary with new terms and cross-references to external definitions, delivering measurable improvements in knowledge management and onboarding. No major bug fixes were observed or required in this scope.

September 2025: Improved developer onboarding and setup reliability for editoast in OpenRailAssociation/osrd. Focused on a targeted documentation fix to ensure local development environments initialize correctly, aligning setup instructions with docker-compose dependencies. This work reduces onboarding time and setup-related errors, enabling faster contribution cycles and more predictable local runs.