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Sam

PROFILE

Sam

Sam Liu developed core autonomous and vision systems for the Earl-Of-March-FRC/2025-7476-Reefscape robotics codebase, focusing on reliability, maintainability, and rapid iteration. He integrated dynamic launcher velocity modes, vision-based pose estimation, and autonomous navigation using Java and Python, leveraging WPILib and OpenCV for real-time control and perception. His work included refactoring subsystems, implementing PID control, and enhancing sensor integration, which improved targeting accuracy and startup times. By standardizing build processes and improving documentation, Sam enabled faster onboarding and more robust CI/CD workflows. The depth of his contributions addressed both technical debt and competitive performance requirements for FRC robotics.

Overall Statistics

Feature vs Bugs

74%Features

Repository Contributions

96Total
Bugs
11
Commits
96
Features
31
Lines of code
8,689
Activity Months4

Work History

April 2025

10 Commits • 2 Features

Apr 1, 2025

April 2025 monthly summary for Reefscape (Earl-Of-March-FRC/2025-7476-Reefscape). Focused on delivering dynamic launcher velocity mode and vision-based pose estimation improvements, with targeted PID/tuning, auto-alignment, and drivetrain setpoints, plus PhotonVision integration and camera offsets corrections. Result: more reliable target acquisition, adaptable launch behavior, and improved calibration workflow for competitive runs.

March 2025

37 Commits • 16 Features

Mar 1, 2025

March 2025 performance summary for Reefscape (repo: Earl-Of-March-FRC/2025-7476-Reefscape). Focused on reliability, maintainability, and startup/vision robustness. Delivered significant features, fixed critical pathfinding and pose handling issues, improved field alignment and perception reliability, and introduced refactors to reduce technical debt while sustaining system performance. Business value delivered includes faster startup times, more accurate autonomous behavior, and easier long-term maintenance across the Reefscape codebase.

February 2025

19 Commits • 2 Features

Feb 1, 2025

February 2025 – Reefscape: Delivered substantial improvements to the Indexer subsystem and overall codebase, delivering clear business value through reliability, maintainability, and faster iteration. Major bug fixes included removing unstable PID velocity control and stabilizing sensor behavior with a beam-break sensor upgrade. The work enhances observability with added logging and measurable metrics, and positions the project for scalable future work.

January 2025

30 Commits • 11 Features

Jan 1, 2025

January 2025 monthly summary for Earl-Of-March-FRC/2025-7476-Reefscape focused on delivering a robust, production-ready repo and autonomous capabilities, while stabilizing the build process and improving documentation. Key outcomes include a WPILib-template bootstrap and Linux Gradle build standardization, integrated CI, a drive subsystem with odometry, and enhanced autonomous workflows. Vision integration was stabilized by moving Limelight code into Reefscape and adding URCL support. Code quality improvements and merge hygiene reduced risk in ongoing development. Impact: Improved build stability, faster onboarding for new contributors, more reliable autonomous behavior, and clearer, up-to-date documentation.

Activity

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Quality Metrics

Correctness90.6%
Maintainability91.4%
Architecture89.6%
Performance85.6%
AI Usage20.0%

Skills & Technologies

Programming Languages

GLSLGLTFGradleJavaJavaScriptMarkdownPythonShellYAML

Technical Skills

3D Asset Integration3D ModelingAprilTagAutonomous ControlAutonomous NavigationAutonomous RoutinesBang-Bang ControlBuild System ConfigurationCI/CDCode CleanupCode FormattingCode MigrationCode OrganizationCode RefactoringCommand-Based Framework

Repositories Contributed To

1 repo

Overview of all repositories you've contributed to across your timeline

Earl-Of-March-FRC/2025-7476-Reefscape

Jan 2025 Apr 2025
4 Months active

Languages Used

GradleJavaMarkdownPythonShellYAMLGLSLGLTF

Technical Skills

Autonomous NavigationAutonomous RoutinesBuild System ConfigurationCI/CDCode FormattingCode Migration

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