DataDog/datadog-agent
Jun 2025 – Jul 2026
14 Months active
Languages Used
CGoMarkdownYAMLGoAssemblyShellJSONPython
Technical Skills
DocumentationLinux KernelObservabilitySecurity MonitoringSystem ProgrammingeBPF
Théo Putegnat
PROFILE
Théo Putegnat
Over 14 months, contributed to DataDog/datadog-agent by building and enhancing security monitoring, observability, and remediation features for cloud-native environments. Developed kernel-level event tracking using Go, C, and eBPF, enabling real-time syscall and network activity monitoring across diverse Linux systems. Improved reliability through robust test infrastructure, dynamic kernel offset resolution, and concurrency-safe workflows. Enhanced container instrumentation to support hardened Kubernetes deployments, refined documentation for clarity, and implemented automated remediation with detailed status reporting. Addressed kernel compatibility and CI stability, ensuring safe, portable deployments. The work emphasized maintainable code, thorough validation, and seamless integration of security telemetry into production pipelines.
Overall Statistics
Feature vs Bugs
62%Features
Repository Contributions
63Total
Bugs
16
Commits
63
Features
26
Lines of code
26,986
Activity Months14
Your Network
1305 peopleWork History
July 2026
3 Commits • 1 Features
Jul 1, 2026July 2026: DataDog/datadog-agent delivered key Cloud Workload Security improvements and kernel portability fixes. Highlights: clarified setsockopt event docs and related Go serializer fields; added pre-check validation for BPF filters on drop actions to prevent faulty rule application (partially_loaded state on invalid config); implemented dynamic offset resolution for socket.type to ensure eBPF probes work across kernel versions, validated by existing functional tests. Business value: reduces misconfig risk, increases reliability, and broadens environment support. Technologies/skills demonstrated: eBPF, BTF/dynamic offset resolution, Go code updates, documentation/serialization alignment.
3 Commits • 1 Features
Jul 1, 2026July 2026: DataDog/datadog-agent delivered key Cloud Workload Security improvements and kernel portability fixes. Highlights: clarified setsockopt event docs and related Go serializer fields; added pre-check validation for BPF filters on drop actions to prevent faulty rule application (partially_loaded state on invalid config); implemented dynamic offset resolution for socket.type to ensure eBPF probes work across kernel versions, validated by existing functional tests. Business value: reduces misconfig risk, increases reliability, and broadens environment support. Technologies/skills demonstrated: eBPF, BTF/dynamic offset resolution, Go code updates, documentation/serialization alignment.
July 2026
June 2026
4 Commits • 1 Features
Jun 1, 2026June 2026 monthly summary focusing on key accomplishments and business impact for DataDog/datadog-agent. Highlighted efforts improved reliability of eBPF program generation and enhanced instrumentation usability in hardened Kubernetes environments. Delivered fixes and enhancements that increase operational reliability, kernel compatibility, and developer productivity, with strong testing and validation.
June 2026
4 Commits • 1 Features
Jun 1, 2026June 2026 monthly summary focusing on key accomplishments and business impact for DataDog/datadog-agent. Highlighted efforts improved reliability of eBPF program generation and enhanced instrumentation usability in hardened Kubernetes environments. Delivered fixes and enhancements that increase operational reliability, kernel compatibility, and developer productivity, with strong testing and validation.
May 2026
5 Commits • 2 Features
May 1, 2026Monthly summary for May 2026 (DataDog/datadog-agent): Key features delivered: - Syscall error visibility flag introduced to enable tracking of all syscall errors; default behavior unchanged, but when enabled, negative return values are treated as handled and surfaced to userspace (commit 611b67bd26aa29b45b23f1c7847acd38eeaa6f33). - CWS instrumentation writability improvement: refined writability checks to allow instrumentation on containers with read-only root filesystems if a writable volume is mounted (commit 5d43c10b6d0b2e1be588aab240d581d7a64ecd0d). - Test infrastructure reliability improvements: fixed race conditions in the test event handler to prevent deadlocks and added a retry for flaky remediation tests to improve robustness (commits 86fc75d12bd3a271f72615d7408525fb08a0774e and 55da4cfe92921ab41e9735f351761f1dfd83be2b). - Test compatibility fix for Ubuntu 25.10: replaced shell touch with os.Open to generate an open event, addressing compatibility with newer Rust version (commit 63a5c60abece4514546ac4207f70fb6c1a009d99). Major bugs fixed: - Race-related deadlocks in test event handling caused by holding a read lock across potentially blocking calls; resolved by snapshot approach and early release of read locks (86fc75d12bd3a271f72615d7408525fb08a0774e). - Flaky remediation tests due to incorrect event sequencing; introduced retry mechanism to stabilize outcomes (55da4cfe92921ab41e9735f351761f1dfd83be2b). Overall impact and accomplishments: - Improved CI stability and test reliability across environments, reducing flaky test cycles and speeding up feedback to developers. - Enhanced observability into syscall-related errors with a configurable visibility flag, enabling better diagnosis without changing default user experience. - More robust container instrumentation in real-world deployments, including scenarios with read-only root filesystems and mounted writable volumes. - Cross-platform compatibility improvements, ensuring tests run reliably on newer OS versions (e.g., Ubuntu 25.10). Technologies/skills demonstrated: - Go, concurrency patterns, and test infrastructure design (race condition fixes and retries). - Kernel/user-space visibility through eBPF-related config and runtime hooks. - Kubernetes and container instrumentation concepts (CWS webhook, remote_copy, volume mounts). - Cross-distro/OS testing strategies and test-driven fixes to maintain CI health.
5 Commits • 2 Features
May 1, 2026Monthly summary for May 2026 (DataDog/datadog-agent): Key features delivered: - Syscall error visibility flag introduced to enable tracking of all syscall errors; default behavior unchanged, but when enabled, negative return values are treated as handled and surfaced to userspace (commit 611b67bd26aa29b45b23f1c7847acd38eeaa6f33). - CWS instrumentation writability improvement: refined writability checks to allow instrumentation on containers with read-only root filesystems if a writable volume is mounted (commit 5d43c10b6d0b2e1be588aab240d581d7a64ecd0d). - Test infrastructure reliability improvements: fixed race conditions in the test event handler to prevent deadlocks and added a retry for flaky remediation tests to improve robustness (commits 86fc75d12bd3a271f72615d7408525fb08a0774e and 55da4cfe92921ab41e9735f351761f1dfd83be2b). - Test compatibility fix for Ubuntu 25.10: replaced shell touch with os.Open to generate an open event, addressing compatibility with newer Rust version (commit 63a5c60abece4514546ac4207f70fb6c1a009d99). Major bugs fixed: - Race-related deadlocks in test event handling caused by holding a read lock across potentially blocking calls; resolved by snapshot approach and early release of read locks (86fc75d12bd3a271f72615d7408525fb08a0774e). - Flaky remediation tests due to incorrect event sequencing; introduced retry mechanism to stabilize outcomes (55da4cfe92921ab41e9735f351761f1dfd83be2b). Overall impact and accomplishments: - Improved CI stability and test reliability across environments, reducing flaky test cycles and speeding up feedback to developers. - Enhanced observability into syscall-related errors with a configurable visibility flag, enabling better diagnosis without changing default user experience. - More robust container instrumentation in real-world deployments, including scenarios with read-only root filesystems and mounted writable volumes. - Cross-platform compatibility improvements, ensuring tests run reliably on newer OS versions (e.g., Ubuntu 25.10). Technologies/skills demonstrated: - Go, concurrency patterns, and test infrastructure design (race condition fixes and retries). - Kernel/user-space visibility through eBPF-related config and runtime hooks. - Kubernetes and container instrumentation concepts (CWS webhook, remote_copy, volume mounts). - Cross-distro/OS testing strategies and test-driven fixes to maintain CI health.
May 2026
April 2026
3 Commits • 2 Features
Apr 1, 2026Concise monthly summary for 2026-04 focusing on DataDog/datadog-agent contributions and business impact.
April 2026
3 Commits • 2 Features
Apr 1, 2026Concise monthly summary for 2026-04 focusing on DataDog/datadog-agent contributions and business impact.
March 2026
6 Commits • 3 Features
Mar 1, 2026March 2026 Highlights for DataDog/datadog-agent: Delivered reliability and correctness improvements across remediation reporting, domain resolution, event capture, test stability, and status reporting. Key changes include remediation event delivery with a new kill-action status; domain resolution improvements with a safe fallback and private-domain filtering; configurable rate limiting to capture all events; test harness stabilization with a flush for in-flight messages; and network isolation status reporting fixes with a scope-aware key and isolation flag. These changes improve production reliability, observability, and CI stability, enabling safer, more complete remediation workflows and accurate status feedback.
6 Commits • 3 Features
Mar 1, 2026March 2026 Highlights for DataDog/datadog-agent: Delivered reliability and correctness improvements across remediation reporting, domain resolution, event capture, test stability, and status reporting. Key changes include remediation event delivery with a new kill-action status; domain resolution improvements with a safe fallback and private-domain filtering; configurable rate limiting to capture all events; test harness stabilization with a flush for in-flight messages; and network isolation status reporting fixes with a scope-aware key and isolation flag. These changes improve production reliability, observability, and CI stability, enabling safer, more complete remediation workflows and accurate status feedback.
March 2026
February 2026
1 Commits
Feb 1, 2026February 2026 monthly summary for DataDog/datadog-agent focusing on reliability and correctness of remediation workflows. Key updates include stability improvements to the Remediation Status Report and Actions by addressing three related bugs: (1) proper handling of cgroup scope within remediation reporting, (2) preventing agent panics when executing certain remediation action orders, and (3) correcting the key computation for remediation actions. These fixes reduce downtime risk, prevent incorrect remediation mappings, and improve overall trust in remediation results. The work demonstrates strong debugging, code hygiene, and safety in production-critical paths, with a clear business impact: more reliable remediation operations and safer deployments. Technologies/skills demonstrated include Go/Agent code contributions, Linux cgroups handling, concurrency-safety fixes, and thorough triage and validation under CI.”,
February 2026
1 Commits
Feb 1, 2026February 2026 monthly summary for DataDog/datadog-agent focusing on reliability and correctness of remediation workflows. Key updates include stability improvements to the Remediation Status Report and Actions by addressing three related bugs: (1) proper handling of cgroup scope within remediation reporting, (2) preventing agent panics when executing certain remediation action orders, and (3) correcting the key computation for remediation actions. These fixes reduce downtime risk, prevent incorrect remediation mappings, and improve overall trust in remediation results. The work demonstrates strong debugging, code hygiene, and safety in production-critical paths, with a clear business impact: more reliable remediation operations and safer deployments. Technologies/skills demonstrated include Go/Agent code contributions, Linux cgroups handling, concurrency-safety fixes, and thorough triage and validation under CI.”,
January 2026
8 Commits • 3 Features
Jan 1, 2026January 2026 monthly summary for DataDog/datadog-agent focused on reliability, hygiene, and real-time event processing improvements. Delivered features that enhance observability and automation, fixed core test stability issues, and standardized operational terminology to reduce ambiguity in incident response and remediation workflows.
8 Commits • 3 Features
Jan 1, 2026January 2026 monthly summary for DataDog/datadog-agent focused on reliability, hygiene, and real-time event processing improvements. Delivered features that enhance observability and automation, fixed core test stability issues, and standardized operational terminology to reduce ambiguity in incident response and remediation workflows.
January 2026
December 2025
10 Commits • 5 Features
Dec 1, 2025Concise monthly summary for DataDog/datadog-agent for December 2025 focusing on delivering security and observability improvements, reducing noise, and enhancing debugging visibility. Work this month centered on feature enhancements across the security data plane, improved remediation event telemetry, and richer documentation to support adoption and maintenance.
December 2025
10 Commits • 5 Features
Dec 1, 2025Concise monthly summary for DataDog/datadog-agent for December 2025 focusing on delivering security and observability improvements, reducing noise, and enhancing debugging visibility. Work this month centered on feature enhancements across the security data plane, improved remediation event telemetry, and richer documentation to support adoption and maintenance.
November 2025
3 Commits • 1 Features
Nov 1, 2025November 2025 performance summary for DataDog/datadog-agent: Delivered two high-value changes focused on security telemetry and workflow efficiency. Implemented Session Tracking Enhancements for SSH and Kubernetes to provide distinct session IDs, improved logging, and serialization fixes for clearer remote-activity visibility. Fixed a key optimization in the Approver workflow by integrating prctl events into the approval logic to reduce unutilized events and improve efficiency. These changes deliver clearer security telemetry, reduced operational noise, faster decision-making, and improved maintainability of session and approval components.
3 Commits • 1 Features
Nov 1, 2025November 2025 performance summary for DataDog/datadog-agent: Delivered two high-value changes focused on security telemetry and workflow efficiency. Implemented Session Tracking Enhancements for SSH and Kubernetes to provide distinct session IDs, improved logging, and serialization fixes for clearer remote-activity visibility. Fixed a key optimization in the Approver workflow by integrating prctl events into the approval logic to reduce unutilized events and improve efficiency. These changes deliver clearer security telemetry, reduced operational noise, faster decision-making, and improved maintainability of session and approval components.
November 2025
October 2025
3 Commits • 2 Features
Oct 1, 2025Monthly work summary for 2025-10 focusing on DataDog/datadog-agent. Highlights include stabilizing CI by skipping a flaky CentOS 7 UserGroup test, refactoring the EBPF probe event handling into smaller functions for clarity and maintainability, and enhancing Cloud Work Security by exporting user session data and introducing an SSH session type to support future SSH session tracking. These changes improve CI reliability, code quality, and security telemetry readiness, aligning with product quality goals and future security features.
October 2025
3 Commits • 2 Features
Oct 1, 2025Monthly work summary for 2025-10 focusing on DataDog/datadog-agent. Highlights include stabilizing CI by skipping a flaky CentOS 7 UserGroup test, refactoring the EBPF probe event handling into smaller functions for clarity and maintainability, and enhancing Cloud Work Security by exporting user session data and introducing an SSH session type to support future SSH session tracking. These changes improve CI reliability, code quality, and security telemetry readiness, aligning with product quality goals and future security features.
September 2025
5 Commits • 1 Features
Sep 1, 2025Concise monthly summary for DataDog/datadog-agent (Sept 2025) focusing on delivered features, fixed bugs, impact, and technical skills demonstrated. Highlights value delivered to security monitoring, observability, and stability.
5 Commits • 1 Features
Sep 1, 2025Concise monthly summary for DataDog/datadog-agent (Sept 2025) focusing on delivered features, fixed bugs, impact, and technical skills demonstrated. Highlights value delivered to security monitoring, observability, and stability.
September 2025
August 2025
6 Commits • 2 Features
Aug 1, 2025Monthly summary for 2025-08 focused on delivering measurable business and technical value for DataDog/datadog-agent. Highlights include network observability and security event capture enhancements, proactive detection improvements for symlink-based file access, and substantial stabilization of the test harness to accelerate iteration cycles. The work supports safer containerized deployments, improved threat visibility, and a more reliable release process.
August 2025
6 Commits • 2 Features
Aug 1, 2025Monthly summary for 2025-08 focused on delivering measurable business and technical value for DataDog/datadog-agent. Highlights include network observability and security event capture enhancements, proactive detection improvements for symlink-based file access, and substantial stabilization of the test harness to accelerate iteration cycles. The work supports safer containerized deployments, improved threat visibility, and a more reliable release process.
July 2025
5 Commits • 2 Features
Jul 1, 2025Performance-focused monthly summary for 2025-07 focusing on DataDog/datadog-agent: key feature deliveries, reliability improvements, and engineering excellence that drive observability and business value.
5 Commits • 2 Features
Jul 1, 2025Performance-focused monthly summary for 2025-07 focusing on DataDog/datadog-agent: key feature deliveries, reliability improvements, and engineering excellence that drive observability and business value.
July 2025
June 2025
1 Commits • 1 Features
Jun 1, 2025June 2025 monthly summary for DataDog/datadog-agent. Focused on delivering security-focused feature: Cloud Workload Security Setsockopt Monitoring, enabling tracking of setsockopt syscall with docs, event definitions, and probe configurations to improve security visibility and enable policy enforcement. No major bugs reported this month; all efforts concentrated on feature delivery and documentation. This work strengthens data security posture and provides the foundation for broader socket-level monitoring in future releases.
June 2025
1 Commits • 1 Features
Jun 1, 2025June 2025 monthly summary for DataDog/datadog-agent. Focused on delivering security-focused feature: Cloud Workload Security Setsockopt Monitoring, enabling tracking of setsockopt syscall with docs, event definitions, and probe configurations to improve security visibility and enable policy enforcement. No major bugs reported this month; all efforts concentrated on feature delivery and documentation. This work strengthens data security posture and provides the foundation for broader socket-level monitoring in future releases.
Activity
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Quality Metrics
Correctness93.8%
Maintainability86.6%
Architecture87.8%
Performance83.8%
AI Usage26.0%
Skills & Technologies
Programming Languages
CGoGoAssemblyJSONMarkdownPythonRustShellYAML
Technical Skills
BPFBackend DevelopmentBazelCC DevelopmentCI/CDCloud SecurityCode CleanupCode RefactoringContainerizationData ModelingDevOpsDocumentationEvent ProcessingGo
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