February 2026 (2026-02) monthly summary for ecmwf/anemoi-core: Migration Rollback Functionality Cleanup. Delivered targeted migration subsystem cleanup by removing unused rollback functionality, reducing maintenance burden and risk of incorrect rollbacks. Change implemented via commit 5490b80541ac938395ec80fd8fd5591ce6073e40 as part of PR #830, with emphasis on code clarity and dependency reduction. Result: safer migrations, smaller surface area, and clearer guidelines for future migration tooling improvements. This work enhances stability for deployments and developer onboarding.

October 2025 monthly summary for the ecmwf/anemoi-core repository, highlighting the work delivered in 2025-10 and its business and technical impact.

September 2025 monthly summary for ecmwf/anemoi-core focusing on migration tooling stability and test reliability. Delivered a critical fix to Migration Import Path Validation and Error Handling in the Anemoi Framework, addressing the base package path for migration imports and escalating related warnings to errors to improve detection in integration tests. This change enhances migration reliability and CI feedback loops, reducing risk of undetected migration issues.

In August 2025, the ecmwf/anemoi-inference repo focused on improving test infrastructure by updating the get_test_data fixture to use the GetTestData class from anemoi.utils.testing. This refactor clarifies typing, enhances maintainability of the testing suite, and reduces risk of typing-related issues in tests. No major bugs were fixed this month; the activity centered on a targeted quality-of-life improvement with measurable impact on code clarity and test reliability. The work supports faster onboarding and more reliable CI.

July 2025 (ecmwf/anemoi-inference): Implemented a major feature to add per-input pre-processors and per-output post-processors in the Anemoi inference framework, enabling per-source preprocessing and per-destination post-processing. This resolves issues with applying uniform preprocessors to diverse inputs and enhances output handling, including the tee path. The work is driven by modular inner-level processors and is backed by commit 59664cbf07f3b87d968c46e8033ad92eeb077a89 (feat: inner-level processors (#260)). No critical bugs were reported this month; this feature lays groundwork for broader data source support and safer experimentation across pipelines.

June 2025 monthly summary for ecmwf/anemoi-inference focused on stability, reliability, and configuration flexibility. Delivered a critical bug fix in Cutout and implemented OmegaConf-based configuration management with interpolation and overrides, enhancing experiment reproducibility and maintainability.