aws/amazon-ssm-agent
Oct 2024 – Sep 2025
10 Months active
Languages Used
GoMarkdown
Technical Skills
Gobackend developmenttestingGo ProgrammingWMIWindows Development
Dragan Mihaljevic
PROFILE
Dragan Mihaljevic
Dragan Mihalj worked on the aws/amazon-ssm-agent repository, delivering twelve features and addressing reliability, maintainability, and security across the agent’s lifecycle. He unified platform data retrieval with caching, refactored WMI and EC2 detection logic, and enhanced onboarding for on-prem and Windows Server 2025+ environments. Using Go, AWS SDK, and dependency management, Dragan upgraded core libraries for improved performance and security, streamlined error handling, and reduced log noise. His work included targeted bug fixes, robust telemetry enrichment, and comprehensive test coverage, resulting in a more stable, maintainable agent with reduced operational risk and improved diagnostics for cloud and hybrid deployments.
Overall Statistics
Feature vs Bugs
80%Features
Repository Contributions
26Total
Bugs
3
Commits
26
Features
12
Lines of code
425,666
Activity Months10
Your Network
1406 people
Work History
September 2025
1 Commits • 1 Features
Sep 1, 20252025-09 monthly summary for aws/amazon-ssm-agent: Delivered a targeted logging cleanup to reduce log noise by removing redundant UID error logging. The uid variable is already captured at debug level within the params struct. This improves log clarity and observability with minimal code change. No major bugs fixed this month; main work was a focused cleanup aligned with existing logging strategy.
1 Commits • 1 Features
Sep 1, 20252025-09 monthly summary for aws/amazon-ssm-agent: Delivered a targeted logging cleanup to reduce log noise by removing redundant UID error logging. The uid variable is already captured at debug level within the params struct. This improves log clarity and observability with minimal code change. No major bugs fixed this month; main work was a focused cleanup aligned with existing logging strategy.
September 2025
July 2025
1 Commits
Jul 1, 2025July 2025 — aws/amazon-ssm-agent: Key focus on reliability of host information collection. Implemented GetHostInfo error code prefix parsing fix by switching prefixes from dashes to periods to align with service-side parsing. Also adjusted metrics prefixes by removing dashes to prevent misparsing on the service side. Delivered via commit a61db1ff4d840bb48f470eb58df39cdf473e44f3. Impact: improved host data reliability, reduced parsing errors, and smoother service integration; business value: fewer incidents and faster troubleshooting across environments.
July 2025
1 Commits
Jul 1, 2025July 2025 — aws/amazon-ssm-agent: Key focus on reliability of host information collection. Implemented GetHostInfo error code prefix parsing fix by switching prefixes from dashes to periods to align with service-side parsing. Also adjusted metrics prefixes by removing dashes to prevent misparsing on the service side. Delivered via commit a61db1ff4d840bb48f470eb58df39cdf473e44f3. Impact: improved host data reliability, reduced parsing errors, and smoother service integration; business value: fewer incidents and faster troubleshooting across environments.
May 2025
1 Commits • 1 Features
May 1, 2025May 2025 monthly summary: Delivered a network reliability and performance improvement for aws/amazon-ssm-agent by upgrading the Network Library to golang.org/x/net v0.38.0. The upgrade includes upstream bug fixes, performance enhancements, and new network features, contributing to more stable remote management operations and reduced network-related incidents. A dedicated commit (3d1bd0b5fd0751cf4175d1ce07f9738c670bf375) applied the change across the repository. No separate defects were fixed this month; value was realized through the upstream improvements in the core network library.
1 Commits • 1 Features
May 1, 2025May 2025 monthly summary: Delivered a network reliability and performance improvement for aws/amazon-ssm-agent by upgrading the Network Library to golang.org/x/net v0.38.0. The upgrade includes upstream bug fixes, performance enhancements, and new network features, contributing to more stable remote management operations and reduced network-related incidents. A dedicated commit (3d1bd0b5fd0751cf4175d1ce07f9738c670bf375) applied the change across the repository. No separate defects were fixed this month; value was realized through the upstream improvements in the core network library.
May 2025
April 2025
3 Commits • 1 Features
Apr 1, 2025April 2025 monthly summary for aws/amazon-ssm-agent focusing on EC2 environment detection and status monitoring enhancements. Delivered metrics instrumentation for EC2Detector and IMDS EC2 status, enforced EC2Detector for EC2 identity determination, integrated EC2Detector into the detection workflow with improved logging and IMDS fallback, and updated tests to cover new behavior. These changes improve reliability, observability, and security posture for EC2 identity reporting and status checks.
April 2025
3 Commits • 1 Features
Apr 1, 2025April 2025 monthly summary for aws/amazon-ssm-agent focusing on EC2 environment detection and status monitoring enhancements. Delivered metrics instrumentation for EC2Detector and IMDS EC2 status, enforced EC2Detector for EC2 identity determination, integrated EC2Detector into the detection workflow with improved logging and IMDS fallback, and updated tests to cover new behavior. These changes improve reliability, observability, and security posture for EC2 identity reporting and status checks.
March 2025
3 Commits • 1 Features
Mar 1, 2025March 2025 Monthly Summary: Focused on boosting reliability, security, and performance for the aws/amazon-ssm-agent project. Delivered targeted fixes to domain join robustness and agent lifecycle management, complemented by a major Go toolchain upgrade to strengthen security and runtime performance. The work reduced operational risk, improved user experience during domain joins, and set a stronger foundation for future enhancements.
3 Commits • 1 Features
Mar 1, 2025March 2025 Monthly Summary: Focused on boosting reliability, security, and performance for the aws/amazon-ssm-agent project. Delivered targeted fixes to domain join robustness and agent lifecycle management, complemented by a major Go toolchain upgrade to strengthen security and runtime performance. The work reduced operational risk, improved user experience during domain joins, and set a stronger foundation for future enhancements.
March 2025
February 2025
6 Commits • 3 Features
Feb 1, 2025February 2025 monthly summary for aws/amazon-ssm-agent. Focused on maintainability, observability, and reliability. Key changes included refactoring WMI access and EC2 detector logic to simplify maintenance and reduce technical debt, enhancing instance health telemetry by including EC2 detection results in the UpdateInstanceInformation User-Agent header for richer server-side context, and targeted hygiene efforts to align Go modules, stabilize tests, and prepare release notes. These efforts reduce future maintenance cost, improve diagnostics, and increase release readiness. Notable commits include: bddc7b8f4a3d02caf61269c6a93d2569911a2bb8; 1617a503e61cf5f554ab0f1f8c2cb703fb7babd0; 64e5112010ee7b2b2ba5f8248a66da2b11f1d96d; 6f09d0925469170e89a2571afa7e0ddd62152717; ba907c65503fc970f177c92414c3e43dbd254cca; 3dee01c80ab7a3d06abc4dbe4648283162bf7516
February 2025
6 Commits • 3 Features
Feb 1, 2025February 2025 monthly summary for aws/amazon-ssm-agent. Focused on maintainability, observability, and reliability. Key changes included refactoring WMI access and EC2 detector logic to simplify maintenance and reduce technical debt, enhancing instance health telemetry by including EC2 detection results in the UpdateInstanceInformation User-Agent header for richer server-side context, and targeted hygiene efforts to align Go modules, stabilize tests, and prepare release notes. These efforts reduce future maintenance cost, improve diagnostics, and increase release readiness. Notable commits include: bddc7b8f4a3d02caf61269c6a93d2569911a2bb8; 1617a503e61cf5f554ab0f1f8c2cb703fb7babd0; 64e5112010ee7b2b2ba5f8248a66da2b11f1d96d; 6f09d0925469170e89a2571afa7e0ddd62152717; ba907c65503fc970f177c92414c3e43dbd254cca; 3dee01c80ab7a3d06abc4dbe4648283162bf7516
January 2025
2 Commits • 1 Features
Jan 1, 2025January 2025: Focused on back-end stability and performance by upgrading core dependencies in aws/amazon-ssm-agent. Upgraded AWS SDK Go to v1.55.5 and refreshed other project libraries to improve performance, reliability, and compatibility with AWS services. Release notes were updated to document these changes. No customer-facing feature changes this month; these improvements reduce upgrade risk, enhance runtime stability, and position the project for smoother feature work in Q1.
2 Commits • 1 Features
Jan 1, 2025January 2025: Focused on back-end stability and performance by upgrading core dependencies in aws/amazon-ssm-agent. Upgraded AWS SDK Go to v1.55.5 and refreshed other project libraries to improve performance, reliability, and compatibility with AWS services. Release notes were updated to document these changes. No customer-facing feature changes this month; these improvements reduce upgrade risk, enhance runtime stability, and position the project for smoother feature work in Q1.
January 2025
December 2024
7 Commits • 2 Features
Dec 1, 2024December 2024 (Month: 2024-12) – aws/amazon-ssm-agent: Delivered a unified, cached platform data retrieval path across supported platforms, replacing Get-CimInstance with centralized, WMI-based access to improve performance, logging, and maintainability. Implemented security and compatibility updates by upgrading core dependencies (Go crypto, net, and oauth2) to newer versions to strengthen security posture and compatibility. Result: faster data access and agent startup, cleaner architecture, reduced duplication, and a more secure, maintainable codebase across platforms.
December 2024
7 Commits • 2 Features
Dec 1, 2024December 2024 (Month: 2024-12) – aws/amazon-ssm-agent: Delivered a unified, cached platform data retrieval path across supported platforms, replacing Get-CimInstance with centralized, WMI-based access to improve performance, logging, and maintainability. Implemented security and compatibility updates by upgrading core dependencies (Go crypto, net, and oauth2) to newer versions to strengthen security posture and compatibility. Result: faster data access and agent startup, cleaner architecture, reduced duplication, and a more secure, maintainable codebase across platforms.
November 2024
1 Commits • 1 Features
Nov 1, 2024Delivered a WQL-based hardware information retrieval interface for Windows Server 2025+, replacing WMIC to improve hardware fingerprinting robustness and future compatibility. The change, tracked under commit 34f788b6dfaf5f5a69212c7a7bf31012cf7ea30a ('Added alternative to wmic to support Windows 2025'), reduces reliance on legacy WMIC tooling and enhances cross-version reliability for enterprise Windows deployments.
1 Commits • 1 Features
Nov 1, 2024Delivered a WQL-based hardware information retrieval interface for Windows Server 2025+, replacing WMIC to improve hardware fingerprinting robustness and future compatibility. The change, tracked under commit 34f788b6dfaf5f5a69212c7a7bf31012cf7ea30a ('Added alternative to wmic to support Windows 2025'), reduces reliance on legacy WMIC tooling and enhances cross-version reliability for enterprise Windows deployments.
November 2024
October 2024
1 Commits • 1 Features
Oct 1, 2024Month: 2024-10 — Focused on improving onboarding reliability for on-prem agents in aws/amazon-ssm-agent. Delivered Agent Registration Reliability Enhancement by increasing the RunCommand timeout during the registration process for on-prem instances, improving registration success rates and reducing onboarding failures. Commit ab4144f220eb7c9cc010513d77212658308efb7f. No major bugs fixed this month. Overall impact: higher onboarding reliability, smoother automated management for on-prem deployments, and reduced support overhead. Technologies/skills demonstrated: RunCommand timeout tuning, on-prem registration flow, reliability engineering, code changes in AWS SSM Agent.
October 2024
1 Commits • 1 Features
Oct 1, 2024Month: 2024-10 — Focused on improving onboarding reliability for on-prem agents in aws/amazon-ssm-agent. Delivered Agent Registration Reliability Enhancement by increasing the RunCommand timeout during the registration process for on-prem instances, improving registration success rates and reducing onboarding failures. Commit ab4144f220eb7c9cc010513d77212658308efb7f. No major bugs fixed this month. Overall impact: higher onboarding reliability, smoother automated management for on-prem deployments, and reduced support overhead. Technologies/skills demonstrated: RunCommand timeout tuning, on-prem registration flow, reliability engineering, code changes in AWS SSM Agent.
Activity
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Quality Metrics
Correctness93.8%
Maintainability90.0%
Architecture90.0%
Performance90.0%
AI Usage73.0%
Skills & Technologies
Programming Languages
GoMarkdown
Technical Skills
API DevelopmentAPI developmentAPI integrationAWSAWS SDKAWS SDK for GoCloud ComputingCloud ServicesDependency ManagementDevOpsGoGo ProgrammingGo developmentModule managementOAuth2
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