February 2026 (2026-02) — Key feature delivered: Phase 1 of the Checkpoint Pipeline Infrastructure for ecmwf/anemoi-core, establishing core abstractions, orchestration patterns, and dynamic component discovery to enable flexible checkpoint handling. Implemented robust error handling, utility helpers (download retry, validation, metadata extraction), and support for async/sync execution. Added unit and integration tests, plus documentation previews. This foundation enables Phase 2 (Acquisition, Loading Orchestration, Model Transformation) and Phase 3 system integration, aligning with multi-phase rollout.

November 2025 monthly summary focusing on a stability and reliability improvement for Hydra-based config discovery in ecmwf/anemoi-core. The major deliverable was a bug fix that resolves MissingConfigException during config validation by updating the Hydra search path to include package configs (e.g., training/default). Key deliverable: append package config path (pkg://anemoi.training/config) to Hydra search path via AnemoiSearchPathPlugin, enabling discovery of package configs during config validate. This is a critical foundation for reliable config management across training workflows and package defaults. This month also included targeted unit tests and manual validation to ensure no regressions and to verify the fix under real-world config scenarios. The change preserves user config priority (cwd/home/env > Hydra built-ins > package configs) and is additive, with no breaking changes. Co-authored-by: Harrison Cook <Harrison.cook@ecmwf.int> Co-authored-by: Ana Prieto Nemesio <91897203+anaprietonem@users.noreply.github.com>

February 2025: Implemented automated release management and PyPI publishing workflows for ecmwf/anemoi-core, enabling reliable, unattended package publishing for deployment targets (training, models, graphs) and automated release PRs on pushes to main/hotfix branches. This work enhances release reliability, traceability, and deployment speed across environments.

January 2025: Delivered reliability improvements and streamlined CI/CD workflows across three repositories, directly enabling faster, safer deployments and clearer build processes. Key fixes and optimizations improved deployment correctness, reduced pipeline complexity, and improved documentation builds, delivering measurable business value through reduced downtime and faster release cycles.

December 2024 monthly recap focusing on delivering business value through data integrity, automation, and release processes across core libraries. Emphasis on robust model training data alignment, maintainability of the monorepo, and secure, streamlined releases.

Month: 2024-11 Overview: Delivered a cohesive set of tooling and CI improvements across five repositories to streamline development, reduce noise from deprecated tooling, and strengthen release governance. Focus was on pre-commit cleanup, CI workflow consistency, and automated changelog handling to enhance release traceability and reduce maintenance overhead. Key features delivered: - ecmwf/anemoi-docs: Pre-commit configuration cleanup by removing the deprecated docconvert hook and updating the .pre-commit-config.yaml to simplify the workflow. - ecmwf/anemoi-inference: CI workflow and pre-commit tooling cleanup, including removal of the unused docconvert hook, and updates to trigger changelog generation after successful package uploads with release notes included in PRs to preserve versioning integrity. - ecmwf/anemoi-registry: Development workflow enhancement by removing the docconvert pre-commit hook to streamline tooling and reduce noise. - ecmwf/anemoi-transform: (a) Pre-commit configuration cleanup removing docconvert hook; (b) CI/Release workflow improvements to trigger changelog updates after releases, include release notes in PR bodies, and warn against squashing commits to reduce merge conflicts. - ecmwf/anemoi-utils: (a) Pre-commit configuration cleanup removing unused docconvert tooling; (b) Changelog automation after package release with CI triggering changelog updates, copying release notes to changelog, and guidance for preserving correct tag versioning on develop. Major bugs fixed (inferred from cleanup work): - Resolved recurring issues caused by deprecated docconvert tooling in pre-commit configurations, reducing false positives and misconfigurations across multiple repos. - Stabilized release and merge processes by introducing guardrails against commit squashing that could lead to conflicts. Overall impact and accomplishments: - Streamlined development tooling and CI pipelines across five repositories, enabling faster, more reliable releases with better traceability. - Reduced maintenance burden by removing deprecated hooks and standardizing changelog and release notes handling. - Improved versioning integrity and governance through PR-level release notes and explicit guidance for tag management on develop. Technologies/skills demonstrated: - Pre-commit tooling cleanup and configuration management - CI/CD optimization and workflow orchestration - Changelog automation and release-note propagation - Release governance, versioning discipline, and merge-conflict mitigation

October 2024: Delivered sub-hour time stepping support in ecmwf/anemoi-core datasets. Refactored time increment calculations into a dedicated utility function to improve error handling and clarity. Updated the changelog to document the feature. No major bugs fixed this month. Impact: enables finer temporal resolution for datasets, reduces maintenance risk via centralized logic, and improves overall testability. Technologies/skills demonstrated: Python refactoring, utility function design, documentation/changelog maintenance, and version control discipline.