April 2026 monthly summary focusing on CI infrastructure and build efficiency for CABLE project. Key achievements delivered in April 2026: - CI Infrastructure Upgrade for Spack v1 and Build Efficiency: Upgraded CI to Spack v1, consolidating workflows and improving build efficiency. - Single ci.yml workflow: Consolidated to one ci.yml workflow to reduce maintenance surface and simplify troubleshooting. - Spack v1 toolchains and compiler manifest: Added toolchains in manifest and a dedicated compiler manifest to ensure consistent builds across environments. - Build-cache based builds: Due to GitHub runner limitations, pipeline relies on buildcache for builds to improve reliability and repeatability. - Commit reference: 9c5de9bf4fe5e116aad02d6264a3c3c45e7cb012 ("build-ci v3": Update Infra For `spack v1` (#654)) with co-author Sean Bryan. Major bugs fixed: - No major defects were reported or closed this month; focus remained on reliability and efficiency improvements in CI infrastructure. Overall impact and accomplishments: - Faster, more reliable CI/pipeline for Spack v1, enabling earlier detection of integration issues and smoother onboarding for contributors. - Reduced pipeline complexity and maintenance burden by consolidating workflows and standardizing toolchains, resulting in lower time-to-merge for PRs. - Improved resource efficiency and repeatability of builds through build-cache reliance and manifest-driven environments. Technologies/skills demonstrated: - CI/CD modernization (GitHub Actions) for scientific software - Spack v1 integration and environment tooling - Buildcache-based build strategies to optimize runner usage - Managing manifests: toolchains and compiler manifest - Cross-functional collaboration and documentation of infra changes

March 2026 performance summary: Delivered infra and packaging enhancements across two repositories, focusing on deployment reliability, reproducibility, and dependency hygiene. Key changes include an upgrade to CI/CD Build Configuration Version 8 for ACCESS-ESM1.6 and a packaging stability fix for Python zip archives in spack-packages.

February 2026 monthly summary focusing on key accomplishments, highlighting the work across two primary repositories: ACCESS-NRI/spack-packages and ACCESS-NRI/ACCESS-OM3. The month delivered notable optimizations in CI/CD pipelines, improved compatibility with Spack v1.1, and streamlined configuration management. The efforts reduced build times, decreased maintenance overhead, and laid groundwork for smoother future releases.

January 2026: Delivered targeted infrastructure and CI/CD enhancements for ACCESS-ESM1.6, improving module injection, provenance tracking, deployment automation, and configuration governance. No critical bugs fixed this period. These changes enhance package management reliability, reduce deployment toil, and provide a scalable foundation for future schema-driven deployments.

December 2025 centered on advancing deployment automation for ACCESS-OM3 by introducing a command-driven GitHub Actions mechanism that triggers redeployments and configuration updates via issue comments. The changes were incorporated under Infra Update v7 and included updates to CI/CD workflows to recognize and execute the new commands, reducing manual steps and increasing deployment reliability.

November 2025 (CABLE-LSM/CABLE): Focused on stabilizing CI during Spack config transitions. Implemented a targeted change to pin spack-config-ref to a known-good version to prevent breaking changes from impacting the build CI while testing new Spack configurations. This ensured pipeline reliability during transition and accelerated validation of config updates.

Month: 2025-09. Focused on strengthening CI/testing infrastructure, stabilizing build configurations, and modernizing CI references across two core repos. Key improvements include secure SPACK install workflow, loop-logic fixes for manifest handling, test-specific manifests for Intel-based builds, and a CI versioning upgrade to stable references for maintainability and reliability. These changes reduce build failures, improve reproducibility, and accelerate iteration cycles, delivering measurable business value in deployment confidence and development velocity.

Monthly performance summary for 2025-08 focusing on business value, technical achievements, and cross-repo improvements: - Delivered targeted Spack manifest enhancements for the ACCESS-NRI/spack-packages repo, enabling per-configuration testing for access3 with GCC/Intel variants, MOM6, CICE6, and WW3, plus explicit x86_64 target and removal of a redundant default comment. This improves test coverage precision and reproducibility of build configurations. (Commit: b73ecc20a21859006a6e58c2c6de8c2e32eabae4) - Modernized CI/CD and governance for ACCESS-NRI/ACCESS-OM3: upgraded to build-cd v6, introduced new schema versions for package/config validation, and added CODEOWNERS to codify infrastructure review responsibilities, reducing manual review time and improving stability. (Commit: c5aab8a263f9e4ca52a2d41254f34ad9db0c988b) - Streamlined prerelease workflows and documentation in ACCESS-NRI/access-hive.org.au: refactored prerelease docs to remove outdated projections references, simplified steps to update component versions in spack.yaml, and removed an obsolete configuration step to accelerate user onboarding. (Commit: c5879f07321719da7482f270fc42e357a9930d45) - Migrated and standardized GitHub CI for CABLE-LSM/CABLE with Spack manifests for GCC/Intel builds: introduced GitHub-hosted CI 2.0 system alongside Spack manifests to streamline builds/tests and improve cross-compiler consistency. (Commit: c46783238bf4521f9e169038c336173b871e996c)

July 2025 performance summary for ACCESS-NRI/spack-packages. Delivered packaging and CI reliability improvements, focusing on end-user accessibility, deployment ease, and build reproducibility. Key features delivered include AM3 packaging enhancements that expose executables on PATH and enable dynamic external source integration for JULES and UM within the build process, and the CoastRI-ROMS bundle package introduced as a meta-package to streamline ROMS deployments. Major bug fix delivered for CI manifest handling by splitting default manifests into Intel and GCC configurations and updating CI to use the correct defaults when manifests are missing. This work strengthened packaging reliability, reduced time-to-delivery for scientific workflows, and demonstrated proficiency in Spack packaging, build-system integration, and CI/CD practices.

June 2025 performance summary for ACCESS-NRI/spack-packages focused on repository hygiene and accessibility improvements that reduce maintenance burden and improve developer experience. Implemented targeted CI/CD and access changes aligned with updated infrastructure to simplify workflows and remove SSH-key dependencies.

May 2025 monthly summary focusing on delivering CI/CD reliability improvements and contributor experience enhancements across ACCESS-NRI repositories. Key outcomes include upgrading CI/CD workflows to v5 of the access-nri/build-cd reusable workflows, cross-repo alignment, and documentation streamlining to support prerelease workflows. These changes reduce manual maintenance, accelerate feedback loops, and improve onboarding for contributors.

April 2025 monthly summary for ACCESS-NRI/spack-packages: Delivered the ISSM Deployment Bundle for Spack, enabling versioned deployment of ISSM with its dependencies and spack-config via a new 'access-issm' bundle. Using 'latest' as the version streamlines installation and reduces maintenance overhead, promoting reproducible environments. This work enhances deployment speed, onboarding, and operational reliability for ISSM across research workflows. No major bugs were reported this month; the focus was on packaging automation and ecosystem standardization. Technologies demonstrated include Spack packaging, bundle creation, versioning strategies, and cross-team Git collaboration (commit #e2bdb46e56af8ac14183e7ed25da9235486c973a).

March 2025 monthly summary focusing on business value and technical achievements across ACCESS-NRI repositories; delivered robust CI/CD and workflow enhancements, cleaner configuration, and stronger release governance. Resulted in faster PR validation, improved build reliability, and reproducible environments across critical configs and ESGM pipelines.

February 2025 monthly summary focusing on CI reliability, release hygiene, and CI/CD infrastructure improvements across three repositories. The changes delivered measurable business value by stabilizing pipelines, ensuring deterministic tag management, and improving feedback through status checks and automated monthly validations.

January 2025: Delivered Model Deployment Documentation Improvements for ACCESS-NRI/access-hive.org.au. Enhanced deployment guidance to reduce onboarding friction, clarify prerequisites, and streamline version management in PRs. Introduced a Commands section detailing !bump and !redeploy and added a Prerequisites section outlining HPC run conditions and required access levels. These changes support faster, more reliable model deployments and clearer contributor guidance.

December 2024 focused on strengthening deployment automation, CI/CD reliability, and model-configuration testing across four ACCESS-NRI repositories. Delivered a Spack-based pre-release workflow document, upgraded CI/CD to support redeploy triggers and build-cd v3, and expanded testing coverage to improve reliability and release confidence. These changes reduce manual steps, accelerate model iteration, and enhance security posture through improved secrets handling and cross-repo consistency.

Month: 2024-11 — Delivered configuration improvements and CI workflow enhancements across three repositories, enabling clearer module versioning, streamlined Spack configurations, and automated PR-triggered testing. These changes reduce manual configuration, promote template-driven consistency, and accelerate infrastructure provisioning and validation.

October 2024 monthly summary for ACCESS-NRI/ACCESS-ESM1.6: Delivered the initial Spack-based package management configuration to enable reproducible builds and precise dependency control. Implemented spack.yaml and config to pin exact versions, establishing a repeatable environment foundation for development, testing, and deployment. This work reduces drift, simplifies CI integration, and accelerates onboarding for new contributors.