July 2026: Delivered flexible data-processing enhancements and platform stability improvements for Mantid, driving reproducibility, cross-platform reliability, and faster data analysis workflows. Key features delivered include parameterization of AlignAndFocusPowderSlim and AlignAndFocusPowderFromFiles to support CalibrationWorkspace and MaskWorkspace, and a Linux Qt6 upgrade with CI/build workflow improvements. These changes reduce configuration friction, enable more precise powder analysis, and strengthen maintainability and cross-platform performance.

June 2026 monthly summary for mantid project (mantidproject/mantid). Focused on delivering two major initiatives: FileFinder enhancements for multi-run querying and robust hint parsing, and Qt6 migration with code cleanup. These efforts improve data retrieval performance, platform compatibility, and long-term maintainability while preserving existing behavior and ensuring tests cover new functionality.

May 2026 monthly summary for mantidproject/mantid: Highlights include delivering Python exposure and caching API for InstrumentDataService with retrieval, existence checks, and cache management (with tests); resolving a crash in Instrument Viewer when masking all detectors; adding memory footprint measurement and per-class memory reporting for instrument geometry; upgrading Pixi to 0.60.0; and CI workflow optimization to skip Windows builds for oRNl-next PRs. These changes improve data access performance, memory management, stability, and CI efficiency, enabling faster workflows and more reliable operations for users and developers.

Month: 2026-04 — Delivered Cylindrical sample absorption and multiple scattering corrections for constant-wavelength experiments, enabling accurate corrections for cylindrical geometries and improving data fidelity in Mantid. No major bugs fixed this period; focus was on feature delivery and quality engineering. Overall impact: strengthens Mantid's cylindrical analysis capabilities, reduces post-processing effort, and expands applicable workflows for users working with cylindrical samples. Technologies/skills demonstrated: algorithm design for physics-based corrections, integration with Mantid APIs, version-controlled development, and clear commit-oriented collaboration.

February 2026: Delivered cross-platform FileFinder enhancements, memory allocator migration to TBB malloc, and macOS Clang visibility fixes. These changes improve instrument detection in file discovery, optimize memory usage, and stabilize builds on macOS, delivering higher reliability and performance for data workflows across platforms.

January 2026: Implemented a comprehensive enhancement to AlignAndFocusPowderSlim that adds GroupingWorkspace and SplittersWorkspace support, enabling many-to-many bank-to-spectra mappings and simultaneous grouping/splitting. Removed instrument-specific hard-coding (VULCAN) to enable instrument-agnostic workflows and introduced a Python API to create SplittersWorkspace directly from Python. This work improves scripting usability, expands data-processing flexibility for powder diffraction, and lays groundwork for more scalable, reproducible analysis pipelines.

December 2025 Mantid development: This month focused on delivering significant enhancements to AlignAndFocusPowderSlim and reinforcing stability across the module. Key features delivered include full-time event splitting via ProcessBankSplitFullTimeTask integrated with AlignAndFocusPowderSlim, with NexusLoader unittest support; uncertainty propagation in the AlignAndFocusPowderSlim output; and new focus position parameters (L1, L2, Polar, Azimuthal) to improve focusing. Major bug fixes include Coverity defect resolution in AlignAndFocusPowderSlim, improving error handling, splitter map robustness, and ensuring necessary frequency logs before operation. Overall impact: improved data accuracy, reliability, and testability, enabling more trustworthy powder diffraction results and smoother CI/pipeline integration. Technologies/skills demonstrated include Python/C++ development, unit testing and mocking (NexusLoader), stability improvements, and readiness for release.

November 2025: Focused on strengthening test architecture for AlignAndFocusPowderSlim in the mantid project. Implemented modular testing by relocating header files to inc, introduced a dedicated ProcessEventsTask test, and updated header paths to improve organization, maintainability, and testability. These changes lay groundwork for faster, higher-quality iterations and easier on-boarding of new contributors.

October 2025 performance snapshot for mantid project. Delivered a targeted enhancement to AlignAndFocusPowderSlim that enables multi-workspace output when a splitter workspace is provided, facilitating per-splitter-target data organization and simplifying configuration by removing the SplitterTarget property. The change aligns with ongoing efforts to improve workflow flexibility and data organization in complex spectrometry workflows.

September 2025 monthly summary focusing on delivered features and robustness improvements across mantid and neutrons/data_workflow. Key outcomes include workflow streamlining, data handling improvements, and testing enhancements that deliver business value and improve developer productivity.

August 2025 monthly summary focusing on delivering business value, stabilizing data workflows, and improving developer productivity across Mantid and neutron data projects.

Concise monthly summary for July 2025 focused on business value and technical accomplishments across two repositories. Key features delivered and major fixes delivered this month: Key features delivered: - PV Data Handling Refactor and Cache Purge Improvements (neutrons/data_workflow): Refactored PV data handling by removing the PVString model, consolidated cache purging logic, and introduced configurable cache purge timeouts. Also enhanced testing for data listening and purging mechanisms to streamline data management and improve reliability of PV value retention. Commit 57d178a26c73308bece05a85fb2d595c6c1ea1ef (Keep last PV value #251). - Time-based filtering enhancements for AlignAndFocusPowderSlim (TimeROI, multi-range, and time-based data loading) (mantidproject/mantid): Added TimeROI support, multi-range time filtering, and flexible data loading paths (including loading times from logs/run properties) to improve precise data selection and processing. Commits include 94c3acb37373ac8a5ce0d02b36269f7ed96c1a63, 909c7c095e3505dfcf752437c77705eab7c894ba, 6097a0c4ad0a001faee9879721e30470f53273fe, e448e8048751eb346e0ab86a5d1feeec86977124, a02aafe6f471fc29f338a91de9d47163a1076e20, 430f03d3521fbecc22b362ab33752fdfb9f783fe, f5c8a02fd58f996ae3ed47de21a998ae6b277df7. - Load sample environment logs in LoadWANDSCD (mantidproject/mantid): Extended LoadWANDSCD to load sample environment logs and their units from input files, enabling richer metadata handling. Commit ce21fb055d025bce679555cfa2338e17e87acb7f. - AlignAndFocusPowderSlim: support for input binning units option (mantidproject/mantid): Introduced configurable input binning units (default d-spacing) so that data can be processed in different unit systems with consistent time-of-flight output. Commit e5ba1d0335ced80a8ad6a1869c258d9592b991ef. - Bug fix: AlignAndFocusPowderSlim and chunked loading calibration fixes (mantidproject/mantid): Fixed incorrect idmax calculation in BankCalibration when loading in chunks and ensured correct maximum detector ID handling across chunked loads; added tests for multiple chunking strategies. Commits 4bab0bfdd8a1c5a73de8e16e598d4728e7ea1c36 and abcbffdbc2e8f1c06cca0d576b9cffb731c8f906. - Codebase refactor and modularization of AlignAndFocusPowderSlim (mantidproject/mantid): Moved internal classes into dedicated files/subdirectories and reorganized code to improve modularity and maintainability. Commits 0007c022f2184700122fd453953e273676fdbedf and 7b47aa70b73b969aa6ac1161cfd9a08f290b4f46.

June 2025 monthly summary highlighting key deliverables and improvements across mantid and neutron data workflow. The month focused on safer deprecation of legacy Nexus algorithms, stability and robustness in testing, configuration simplification, performance optimization for large data processing, and expanded instrument variable support. These efforts reduce technical debt, improve reliability, and accelerate data processing workflows for users and developers.

May 2025 monthly summary focusing on key achievements and business value. Delivered strategic deprecations and codebase modernization in Mantid and addressed frontend reliability in data workflows. Key changes include deprecating IntegratePeaksMD v1, migrating Nexus to Mantid::Nexus and removing NeXus usage, and fixing Live Update frontend selectors for dynamic data updates.

April 2025 monthly summary for mantid project (mantid). Focus on delivering business value through robust peak analysis, improved goniometer handling, and API deprecation planning. Highlights include implementing dynamic goniometer convention inference and angle filtering fixes for PredictPeaks; enabling HKL peak position display from Q values in Sliceviewer; and deprecating LoadPreNexus and LoadPreNexusMonitors with clear deprecation notes.

February 2025 monthly summary for mantidproject/mantid. Focused on consolidating Nexus components and hardening NeXus core to support larger datasets and maintainable code. Delivered Nexus library consolidation: merged NexusCpp into the main Nexus library and renamed NexusHDF5 descriptor to Nexus descriptor, reducing fragmentation and easing future maintenance. Improved NeXus robustness with log simplification to reduce noise and adoption of 64-bit dimension sizing to prevent integer overflows in large datasets. These changes improve stability, scalability, and long-term maintainability, enabling safer data processing pipelines for large experiments.