
Hongshi Guo engineered robust Windows and macOS infrastructure for the DataDog/datadog-agent repository, focusing on packaging, diagnostics, and service management. Over eight months, Hongshi delivered features such as Windows Server 2025 support, secure IPC-based WiFi data collection on macOS, and Windows service lifecycle integration for the OTEL agent. Using Go, C, and PowerShell, Hongshi addressed system-level challenges including CPU core reporting accuracy, installer reliability, and cross-platform diagnostics. The work demonstrated depth in system programming, DevOps, and security best practices, resulting in more reliable deployments, improved observability, and streamlined onboarding for both Windows and macOS environments within DataDog’s ecosystem.

January 2026 monthly summary for DataDog/datadog-agent focusing on macOS WiFi data collection hardening and IPC integration. Delivered a secure IPC-based metrics path for macOS WiFi data collection, removing insecure GUI components and hardening permissions on the Datadog Agent run directory to avoid world-writable access while permitting GUI sockets in a dedicated subdirectory. These changes improve security, reliability, and maintainability of macOS data collection while aligning with agent security requirements.
January 2026 monthly summary for DataDog/datadog-agent focusing on macOS WiFi data collection hardening and IPC integration. Delivered a secure IPC-based metrics path for macOS WiFi data collection, removing insecure GUI components and hardening permissions on the Datadog Agent run directory to avoid world-writable access while permitting GUI sockets in a dedicated subdirectory. These changes improve security, reliability, and maintainability of macOS data collection while aligning with agent security requirements.
December 2025: Delivered cross-platform instrumentation and packaging improvements for the Datadog Agent, enhancing observability, reliability, and deployment experience. Key work includes: enhanced diagnostics and data collection across platforms (crash dump collection and improved diagnostics for PowerShell end-to-end tests; IPC-based WiFi data retrieval on macOS with improved logging and error handling), Windows MSI installer for the DDOT OCI package enabling CLI-based installation, and a Windows uninstall reliability fix to remove package entries from the database before deleting the database file to prevent stale locks and installation failures.
December 2025: Delivered cross-platform instrumentation and packaging improvements for the Datadog Agent, enhancing observability, reliability, and deployment experience. Key work includes: enhanced diagnostics and data collection across platforms (crash dump collection and improved diagnostics for PowerShell end-to-end tests; IPC-based WiFi data retrieval on macOS with improved logging and error handling), Windows MSI installer for the DDOT OCI package enabling CLI-based installation, and a Windows uninstall reliability fix to remove package entries from the database before deleting the database file to prevent stale locks and installation failures.
Month 2025-11: Focused on reliability improvements in DataDog/datadog-agent. Implemented a bug fix to ensure that the DDOT service is stopped by the core Agent service, preventing orphaned processes and improving shutdown reliability. The change is recorded in the commit c0e47b014c13f05aa02aea5b27eb415a2d3ccf01 with message 'ddot service stop strategy (#42493)'. Impact includes more predictable deployments, better resource management, and reduced post-deployment troubleshooting. Technologies demonstrated include Go code for agent lifecycle, Linux service management, and PR-based collaboration.
Month 2025-11: Focused on reliability improvements in DataDog/datadog-agent. Implemented a bug fix to ensure that the DDOT service is stopped by the core Agent service, preventing orphaned processes and improving shutdown reliability. The change is recorded in the commit c0e47b014c13f05aa02aea5b27eb415a2d3ccf01 with message 'ddot service stop strategy (#42493)'. Impact includes more predictable deployments, better resource management, and reduced post-deployment troubleshooting. Technologies demonstrated include Go code for agent lifecycle, Linux service management, and PR-based collaboration.
Monthly performance summary for 2025-10 focusing on the Windows packaging readiness work for DDOT within DataDog/datadog-agent. Delivered Windows DDOT OCI packaging and integrated CI deployment to occur before E2E tests, and aligned the DDOT Windows service to run under the ddagentuser account for parity with the main Datadog Agent. This work establishes a stable Windows packaging pipeline and improves test reliability.
Monthly performance summary for 2025-10 focusing on the Windows packaging readiness work for DDOT within DataDog/datadog-agent. Delivered Windows DDOT OCI packaging and integrated CI deployment to occur before E2E tests, and aligned the DDOT Windows service to run under the ddagentuser account for parity with the main Datadog Agent. This work establishes a stable Windows packaging pipeline and improves test reliability.
Concise monthly summary for 2025-09 focusing on feature delivery, bug fixes, impact, and skills demonstrated for the Datadog agent. The main delivery this month was packaging and managing the OTEL agent as a Windows service, enabling streamlined Windows deployments and service-based operation. No major bugs reported/fixed this period; feature improvements centered on Windows packaging, integration with Windows Service Control Manager, and setup of Windows-specific resources, reducing manual steps and enabling reliable onboarding of Windows workloads.
Concise monthly summary for 2025-09 focusing on feature delivery, bug fixes, impact, and skills demonstrated for the Datadog agent. The main delivery this month was packaging and managing the OTEL agent as a Windows service, enabling streamlined Windows deployments and service-based operation. No major bugs reported/fixed this period; feature improvements centered on Windows packaging, integration with Windows Service Control Manager, and setup of Windows-specific resources, reducing manual steps and enabling reliable onboarding of Windows workloads.
Month: 2025-08 — Delivered Windows Server 2025 support in the test infrastructure, enabling validation of workloads on the latest OS release and expanding test coverage across Windows environments.
Month: 2025-08 — Delivered Windows Server 2025 support in the test infrastructure, enabling validation of workloads on the latest OS release and expanding test coverage across Windows environments.
July 2025 focused on Windows reliability and troubleshooting improvements across DataDog/test-infra-definitions and DataDog/datadog-agent. Delivered two significant items: a Windows quoting fix for GKE GCloud Auth Plugin detection to ensure reliable setup identification across Windows shells, and a new Agent Diagnostics capability for Windows user groups and account rights, with enhanced flare data collection. These changes reduce Windows setup failures, speed up incident response, and broaden Windows coverage across CI and customer environments. Demonstrated skills in Windows shell quoting handling, gcloud authentication flows, Windows security principals, and enhanced diagnose/flare tooling, with contributions across two repositories.
July 2025 focused on Windows reliability and troubleshooting improvements across DataDog/test-infra-definitions and DataDog/datadog-agent. Delivered two significant items: a Windows quoting fix for GKE GCloud Auth Plugin detection to ensure reliable setup identification across Windows shells, and a new Agent Diagnostics capability for Windows user groups and account rights, with enhanced flare data collection. These changes reduce Windows setup failures, speed up incident response, and broaden Windows coverage across CI and customer environments. Demonstrated skills in Windows shell quoting handling, gcloud authentication flows, Windows security principals, and enhanced diagnose/flare tooling, with contributions across two repositories.
June 2025 monthly summary for DataDog/datadog-agent focusing on Windows CPU core reporting accuracy improvement. Implemented a new C-based CPU info collector integrated with the Go runtime, with enhanced logging for reliability and debugging. Changes captured in commit 79a09a3a373c1c7eba9f1f9883a07a8d57416199 (WINA-1171: CPU info rework) under (#37528).
June 2025 monthly summary for DataDog/datadog-agent focusing on Windows CPU core reporting accuracy improvement. Implemented a new C-based CPU info collector integrated with the Go runtime, with enhanced logging for reliability and debugging. Changes captured in commit 79a09a3a373c1c7eba9f1f9883a07a8d57416199 (WINA-1171: CPU info rework) under (#37528).
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