
Manuel Rueg engineered robust backend and DevOps solutions across high-impact open source projects, notably kubernetes/kube-state-metrics and home-assistant/core. He delivered features such as RBAC-secured metrics endpoints, resource filtering for efficient monitoring, and streamlined build automation, using Go, Python, and Kubernetes. Manuel modernized CI/CD pipelines, upgraded dependencies for security and compatibility, and enhanced documentation workflows with tools like gomplate. His work included refactoring for maintainability, implementing end-to-end tests, and aligning with evolving Kubernetes APIs. By focusing on reliability, observability, and developer experience, Manuel consistently improved code quality and operational stability, demonstrating depth in system design and open source collaboration.
In March 2026, kube-state-metrics completed targeted tooling modernization and security hardening, delivering a more stable, secure, and developer-friendly foundation for downstream workloads. The work reduces operator risk and accelerates maintainer onboarding through updated tooling, improved guidelines, and robust security fixes.
In March 2026, kube-state-metrics completed targeted tooling modernization and security hardening, delivering a more stable, secure, and developer-friendly foundation for downstream workloads. The work reduces operator risk and accelerates maintainer onboarding through updated tooling, improved guidelines, and robust security fixes.
In February 2026, kube-state-metrics delivered notable reliability and maintainability improvements across documentation tooling, Kubernetes compatibility, and scheduling dependencies. The docs generation workflow was modernized by replacing embedmd with gomplate, reducing dependencies and improving maintenance. WatchList semantics were enhanced to be compatible with Kubernetes 1.35 by propagating the underlying client capabilities through InstrumentedListerWatcher, with tests updated and related metric behavior adjusted. The cron library dependency was updated to a maintained project (netresearch/go-cron) to ensure ongoing support and stability. These changes reduce operational risk, improve test reliability, and enhance developer velocity while preserving observability.
In February 2026, kube-state-metrics delivered notable reliability and maintainability improvements across documentation tooling, Kubernetes compatibility, and scheduling dependencies. The docs generation workflow was modernized by replacing embedmd with gomplate, reducing dependencies and improving maintenance. WatchList semantics were enhanced to be compatible with Kubernetes 1.35 by propagating the underlying client capabilities through InstrumentedListerWatcher, with tests updated and related metric behavior adjusted. The cron library dependency was updated to a maintained project (netresearch/go-cron) to ensure ongoing support and stability. These changes reduce operational risk, improve test reliability, and enhance developer velocity while preserving observability.
January 2026: Delivered key features across two repositories that improve onboarding, monitoring efficiency, and platform compatibility. Key deliverables include: CALM CLI Homebrew installation docs for macOS; Metrics endpoint resource filtering in kube-state-metrics for efficient scrapes and configurable monitoring; Go version centralization, CI workflow alignment, Debian 13 base image, and Kubernetes 1.35 upgrade. This work reduces setup friction, optimizes data volumes in scrapes, and strengthens build/test stability across the Kubernetes ecosystem.
January 2026: Delivered key features across two repositories that improve onboarding, monitoring efficiency, and platform compatibility. Key deliverables include: CALM CLI Homebrew installation docs for macOS; Metrics endpoint resource filtering in kube-state-metrics for efficient scrapes and configurable monitoring; Go version centralization, CI workflow alignment, Debian 13 base image, and Kubernetes 1.35 upgrade. This work reduces setup friction, optimizes data volumes in scrapes, and strengthens build/test stability across the Kubernetes ecosystem.
Month: 2025-12. Key deliverable: a new Homebrew packaging formula CALM for calm-cli in chenrui333/homebrew-core, enabling straightforward installation and distribution. Implemented installation instructions, dependency declarations, and a test block to validate basic CALM CLI functionality. Release: calm-cli 1.24.1 via a new formula, committed as 55df191476b3df97593fc07d66f3b1199056629a. No major bug fixes reported this month; focus was on packaging readiness and distribution readiness. Impact: lower onboarding friction for users, standardized packaging processes, and a scalable foundation for future CALM-related updates.
Month: 2025-12. Key deliverable: a new Homebrew packaging formula CALM for calm-cli in chenrui333/homebrew-core, enabling straightforward installation and distribution. Implemented installation instructions, dependency declarations, and a test block to validate basic CALM CLI functionality. Release: calm-cli 1.24.1 via a new formula, committed as 55df191476b3df97593fc07d66f3b1199056629a. No major bug fixes reported this month; focus was on packaging readiness and distribution readiness. Impact: lower onboarding friction for users, standardized packaging processes, and a scalable foundation for future CALM-related updates.
2025-11 monthly summary: Stabilized grafana/alloy's logging path by pinning the systemd dependency to a fixed version in go.mod and updating import paths in journaltarget.go and journaltarget_test.go to reflect the new versioning. This change reduces build/run-time variability and addresses stability issues in the logging pipeline, improving reliability across environments.
2025-11 monthly summary: Stabilized grafana/alloy's logging path by pinning the systemd dependency to a fixed version in go.mod and updating import paths in journaltarget.go and journaltarget_test.go to reflect the new versioning. This change reduces build/run-time variability and addresses stability issues in the logging pipeline, improving reliability across environments.
September 2025 monthly summary for kubernetes/kube-state-metrics focusing on delivering business value through proactive dependency upgrades, compatibility alignment, and CI workflow improvements.
September 2025 monthly summary for kubernetes/kube-state-metrics focusing on delivering business value through proactive dependency upgrades, compatibility alignment, and CI workflow improvements.
2025-08 Monthly Summary: Focused on delivering forward-compatibility, improving tooling consistency, and enhancing observability across core repos. Key work spanned Kubernetes ecosystem readiness, standardized Go tooling, portability improvements, and advanced metrics labeling. Deliveries reduced maintenance toil, strengthened build/tests in diverse environments, and positioned the codebase for future Go and Kubernetes upgrades.
2025-08 Monthly Summary: Focused on delivering forward-compatibility, improving tooling consistency, and enhancing observability across core repos. Key work spanned Kubernetes ecosystem readiness, standardized Go tooling, portability improvements, and advanced metrics labeling. Deliveries reduced maintenance toil, strengthened build/tests in diverse environments, and positioned the codebase for future Go and Kubernetes upgrades.
July 2025—home-assistant/core focused on stability and compatibility improvements through a critical SwitchBot API dependency upgrade. Upgraded switchbot-api from 2.5.0 to 2.7.0 across both core and test requirements to leverage latest features and fixes and to enhance compatibility with SwitchBot devices. This change reduces integration friction for users and paves the way for upcoming capabilities. The upgrade was implemented via commit 8ca1fe83b74f95a10cf2e771239be05f683b8497, titled 'Bump switchbot-api to v2.7.0 (#147978)'.
July 2025—home-assistant/core focused on stability and compatibility improvements through a critical SwitchBot API dependency upgrade. Upgraded switchbot-api from 2.5.0 to 2.7.0 across both core and test requirements to leverage latest features and fixes and to enhance compatibility with SwitchBot devices. This change reduces integration friction for users and paves the way for upcoming capabilities. The upgrade was implemented via commit 8ca1fe83b74f95a10cf2e771239be05f683b8497, titled 'Bump switchbot-api to v2.7.0 (#147978)'.
June 2025 monthly summary for kubernetes/kube-state-metrics. Delivered security-focused enhancements and kept dependencies current. Key feature: RBAC-based authentication and authorization filter for /metrics with documentation and end-to-end tests; plus test refinements for authentication filtering. Also fixed a Makefile typo affecting JSONNET_CLI usage and updated Kubernetes dependencies to v1.32.6. These changes improved security posture for exposed metrics, increased build reliability, and kept libraries up-to-date. Technologies demonstrated include Go, Kubernetes RBAC (TokenReview and SubjectAccessReview), Makefile/JSONNET, dependency management, end-to-end testing, and comprehensive documentation.
June 2025 monthly summary for kubernetes/kube-state-metrics. Delivered security-focused enhancements and kept dependencies current. Key feature: RBAC-based authentication and authorization filter for /metrics with documentation and end-to-end tests; plus test refinements for authentication filtering. Also fixed a Makefile typo affecting JSONNET_CLI usage and updated Kubernetes dependencies to v1.32.6. These changes improved security posture for exposed metrics, increased build reliability, and kept libraries up-to-date. Technologies demonstrated include Go, Kubernetes RBAC (TokenReview and SubjectAccessReview), Makefile/JSONNET, dependency management, end-to-end testing, and comprehensive documentation.
Monthly summary for 2025-05 focusing on targeted feature delivery, maintenance fixes, and cross-repo improvements with clear business value and technical impact.
Monthly summary for 2025-05 focusing on targeted feature delivery, maintenance fixes, and cross-repo improvements with clear business value and technical impact.
April 2025 monthly summary focused on delivering maintainable feature improvements and improving observability across two repos: kubernetes/kube-state-metrics and home-assistant/core. The month emphasized stable dependency management and enhanced device visibility in integrations to drive better monitoring and customer value.
April 2025 monthly summary focused on delivering maintainable feature improvements and improving observability across two repos: kubernetes/kube-state-metrics and home-assistant/core. The month emphasized stable dependency management and enhanced device visibility in integrations to drive better monitoring and customer value.
Month: 2025-03 summary of key features delivered, major bug fixes, and overall impact across the kubernetes/kube-state-metrics, k3s-io/kube-router, and prometheus/node_exporter repositories. Highlights include introducing a global API object list limit per resource for kube-state-metrics with a configurable CLI flag, aligning CI and code quality with Kubernetes API changes, modernizing the build system and dependencies (AWS SDK v2, Go toolchain), and optimizing the node_exporter diskstats collector for performance and maintainability. These efforts reduce over-fetch, improve reliability and developer velocity, and position the codebase for easier future changes.
Month: 2025-03 summary of key features delivered, major bug fixes, and overall impact across the kubernetes/kube-state-metrics, k3s-io/kube-router, and prometheus/node_exporter repositories. Highlights include introducing a global API object list limit per resource for kube-state-metrics with a configurable CLI flag, aligning CI and code quality with Kubernetes API changes, modernizing the build system and dependencies (AWS SDK v2, Go toolchain), and optimizing the node_exporter diskstats collector for performance and maintainability. These efforts reduce over-fetch, improve reliability and developer velocity, and position the codebase for easier future changes.
February 2025 — Focused on simplifying and modernizing the build system for kubernetes/kube-state-metrics to improve build reliability, contributor onboarding, and maintainability. Implemented Build System Modernization and Go Tooling Consolidation, upgrading to Go 1.24 and integrating tool dependencies into the main go.mod and Makefile. This reduces tooling drift, accelerates iteration, and sets the stage for future tooling enhancements.
February 2025 — Focused on simplifying and modernizing the build system for kubernetes/kube-state-metrics to improve build reliability, contributor onboarding, and maintainability. Implemented Build System Modernization and Go Tooling Consolidation, upgrading to Go 1.24 and integrating tool dependencies into the main go.mod and Makefile. This reduces tooling drift, accelerates iteration, and sets the stage for future tooling enhancements.
In January 2025, kube-state-metrics progressed compatibility, upgrade readiness, and release discipline to support customers with the latest Kubernetes releases. Key features delivered include 1) Kubernetes 1.32 compatibility update, with updated docs and test scripts to reflect support, 2) Deployment v2.14.0 upgrade and internal naming cleanup for clarity, and 3) Release v2.15.0 cut with updated changelog, Makefile, example YAMLs, and refreshed versioned dependencies. Major bugs fixed: none reported this month. Overall impact: enhanced stability and smoother upgrade paths for users on newer Kubernetes versions, improved maintainability through naming clarity and documentation, and stronger release automation that reduces onboarding time. Technologies and skills demonstrated: Kubernetes ecosystem and compatibility testing, Jsonnet refactor for clearer function naming, release engineering (Makefile, changelog, YAML examples), and dependency/version management (Go modules, markdownlint-cli2).
In January 2025, kube-state-metrics progressed compatibility, upgrade readiness, and release discipline to support customers with the latest Kubernetes releases. Key features delivered include 1) Kubernetes 1.32 compatibility update, with updated docs and test scripts to reflect support, 2) Deployment v2.14.0 upgrade and internal naming cleanup for clarity, and 3) Release v2.15.0 cut with updated changelog, Makefile, example YAMLs, and refreshed versioned dependencies. Major bugs fixed: none reported this month. Overall impact: enhanced stability and smoother upgrade paths for users on newer Kubernetes versions, improved maintainability through naming clarity and documentation, and stronger release automation that reduces onboarding time. Technologies and skills demonstrated: Kubernetes ecosystem and compatibility testing, Jsonnet refactor for clearer function naming, release engineering (Makefile, changelog, YAML examples), and dependency/version management (Go modules, markdownlint-cli2).
December 2024 monthly summary for kubernetes/release focused on improving release note generation quality and reliability. The month centered on addressing a targeted release note template bug to ensure clear, correctly formatted changelog links in generated release notes. This work reduces reader confusion and strengthens automation in the release workflow.
December 2024 monthly summary for kubernetes/release focused on improving release note generation quality and reliability. The month centered on addressing a targeted release note template bug to ensure clear, correctly formatted changelog links in generated release notes. This work reduces reader confusion and strengthens automation in the release workflow.
November 2024 monthly summary focused on delivering reliability, data quality, and engineering excellence across three projects. The work combined bug fixes, feature improvements, and infrastructure upgrades to boost product stability, measurement accuracy, and developer velocity.
November 2024 monthly summary focused on delivering reliability, data quality, and engineering excellence across three projects. The work combined bug fixes, feature improvements, and infrastructure upgrades to boost product stability, measurement accuracy, and developer velocity.
2024-10 monthly summary: Focused on improving metric data quality and delivering a stable v2.14.0 release for kube-state-metrics. Implemented consistent exposure of empty labels across endpoints, endpoint slices, pods, and service accounts, and prepared the v2.14.0 release with updated documentation, changelog, and Kubernetes v1.31 compatibility notes. These efforts enhance observability reliability, data completeness, and user adoption.
2024-10 monthly summary: Focused on improving metric data quality and delivering a stable v2.14.0 release for kube-state-metrics. Implemented consistent exposure of empty labels across endpoints, endpoint slices, pods, and service accounts, and prepared the v2.14.0 release with updated documentation, changelog, and Kubernetes v1.31 compatibility notes. These efforts enhance observability reliability, data completeness, and user adoption.

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