Concise monthly summary for 2026-03 focusing on ihmcrobotics/ihmc-alexander-sdk. Key features delivered: - Robot Alex v2 model: Head and forearms additions to enhance visualization, realism, and simulation functionality. Commits: 5eb8ad20918ce91f2c0859d4e755ad533ae79a50; b492e3c215e0ec897a4e47be67ca1f9809702604. Major bugs fixed: - URDF collision detection for v2 model corrected by adding collision geometries for left/right upper arms and adjusting lower body dimensions to ensure accurate physics in simulation. Commit: 18b6a369b61dd71c203bc34b178d66fe3daaac21. Overall impact and accomplishments: - Improved visual fidelity and physical accuracy of the Robot Alex v2, enabling more reliable simulation testing and closer alignment with intended mechanical design. - Reduced risk of physics instability in the sim, accelerating downstream development and validation efforts. Technologies/skills demonstrated: - URDF modeling and collision geometry integration - 3D model integration with simulation pipelines - Version control traceability and incremental feature delivery - Cross-functional collaboration readiness for v2 release

January 2026: Delivered SDK upgrade and documentation enhancements for the Alexander models in ihmc-alexander-sdk, focusing on stability and developer onboarding. Upgraded SDK to 0.3.9 and clarified README structure for Alex models, reducing integration friction. No critical bugs fixed this month, but groundwork laid for upcoming features.

December 2025: Focused on stabilizing the build and repository configuration for ihmc-alexander-sdk to ensure reliable, reproducible CI runs. A critical configuration issue was resolved to point the build to the correct Version Control Repository URL, eliminating a key build failure vector and aligning with centralized standards.

October 2025 monthly performance summary for ihmc-alexander-sdk release engineering. Focused on release readiness and dependency management to enable a smooth 0.3.x release trajectory.

September 2025 delivered key features and bug fixes across ihmc-alexander-sdk and ihmc-open-robotics-software, focusing on visual fidelity, hardware integration, arm safety, and IMU configurability. The work emphasizes business value by improving model realism, reducing risk in arm operation, and enabling flexible sensor setups for standing posture improvements.

Monthly summary for 2025-08: Delivered targeted improvements in simulation fidelity and release readiness across two IHMC repositories. Implemented a coordinate convention alignment in Mujoco to ensure consistent spatial data and physics calculations, and completed 0.2 release housekeeping with formatting improvements and a version bump. Also implemented a temporary workaround for a yaw constraint in the Step Generator to unblock development, with a plan for a formal fix in a future update. These efforts reduce debugging time, improve simulation reliability, and accelerate future releases.

June 2025 monthly summary for ihmcrobotics/ihmc-alexander-sdk focused on delivering ROS 2 messaging enhancements, a type upgrade for greater value range, and repository restructuring to improve maintainability and onboarding. The changes enable more precise hardware configuration control, reduce data-type risks, and align the project structure with future scalability.

Month: 2025-05 — Key features delivered: URDF model path correction for ihmc-alexander-sdk, relocating URDF files under alexander_V1_description to align with access paths. Major bugs fixed: corrected directory structure and path renames that previously broke URDF access, restoring reliable model loading. Overall impact: restored reliable URDF loading across development, CI, and runtime environments, enabling consistent robot model usage in simulations and deployments; reduced integration risk and manual remediation. Technologies/skills demonstrated: version control discipline (commit a8620cb823332f040a5d05df4c4c4b926e530291), URDF asset management, build/test verification, and cross-team alignment on path conventions.