March 2026 monthly summary for facebook/fboss with a focus on tooling architecture and cross-repo health-check tooling improvements. Key deliverable this month was a Tooling Architecture Refactor: Switch Health Check Relocation, moving health tooling into a dedicated project to improve organization, maintainability, and reuse across repos. Summary of changes: relocated system_health_check.py, switch_health_ui.py, get_interface_phy_state.py, health_report.html, and related BUCK targets from fbcode/fboss to fbcode/rtp/mtia-backend-health; shortened BUCK binary target names (get-interface-phy-state, switch-health-ui, system-health-check) since the project path now provides context; added base_module = "rtp.mtia_backend_health" to properly handle hyphenated directory names in Python module paths; updated main_function paths from fboss.* to rtp.mtia_backend_health.*. Commit reference and review: 9d1a62d67930f52fdb6d334f89a27811c9d459a0; Differential Revision: D96502857; Reviewed By: sdbritto. Impact: improves organization and maintainability, enables easier cross-repo reuse of health-check tooling, and reduces onboarding time for new engineers. This month focused on refactoring rather than feature-bearing bug fixes, with no major bugs reported in this ticket stream. Technologies/skills demonstrated: BUCK build system refactor, Python packaging path management, multi-repo tooling architecture, module path normalization for hyphenated directories, and repo hygiene improvements.