Summary for 2026-01: Stabilized dependencies, improved error handling, and hardened build/release processes across two repositories. Key actions include marking cadet==6.0.0a1 as broken to prevent unstable usage; implementing robust exception handling for misconfigured parameters and dependencies in CADET-Core; cleaning up documentation configuration; and upgrading Eigen to v5 with Windows build optimizations and CI/CD updates. Result: reduced downstream risk, faster diagnostics, and more reliable cross-platform builds, supporting faster release readiness and developer productivity.

December 2025 monthly summary for cadet/CADET-Core: Alpha-release versioning and build-system alignment to improve release readiness, downstream validation, and naming compatibility. Implemented core versioning updates and pre-release naming support across the codebase and CMake configuration, signaling ongoing development and enabling future enhancements. No critical bugs reported this month; changes focused on release hygiene and consistency.

In November 2025, CADET-Core delivered meaningful build and modeling improvements that enhance portability, configurability, and developer productivity. Key outcomes include broader Eigen3 compatibility in the CMake build, introduction of wedge geometry in the radial flow model, and a documentation fix to clarify multi-threading build options. These changes reduce environment-specific build friction, expand modeling options for more accurate simulations, and improve documentation clarity for engineers and CI pipelines.

September 2025: For cadet/CADET-Core, delivered targeted robustness improvements, clarified initialization flows, and modernized defaults to simplify onboarding and improve stability. Key outcomes include stronger parameter validation and clearer error messages, better 2DGRM_FV support, richer documentation around initialization and solver options, and a shift to PseudoTransientContinuationSolver as the default nonlinear solver, reducing configuration complexity and improving convergence behavior.

In August 2025, CADET Core delivered major platform improvements focused on simplifying the modeling interface, expanding test coverage, and tightening release processes. Key changes include deprecating legacy particle interfaces and removing obsolete unit operations to reduce debt and enable a generalized, unified modeling stack; unifying the column model builder for consistent unit operations; and adopting a generalized units interface across 1D/2D GRM/LRMP/LRM with accompanying documentation. Expanded testing now covers cross-dimensional GRM comparisons and surface diffusion with per-component evaluation and flexible discretization options. Stability and quality improvements were enacted through critical Jacobian handling fixes, removal of unsupported tests, and parameter multiplexing enhancements. CI/CD and release processes were streamlined to improve reliability and governance, aligning workloads with business needs.

July 2025 focused on delivering modular particle type support and improving numerical robustness in the CADET-Core pipeline, with targeted fixes to ensure data integrity when configurations involve no particles. The work enhances export/record modularity, Jacobian reliability for 1D column units, and overall system maintainability, aligning with business goals of scalable physics simulations and trustworthy data pipelines.

June 2025 performance summary for cadet/CADET-Core focusing on delivering a robust particle modeling stack, generalized 2D column capabilities, and code quality improvements. The work consolidated core architectural changes, expanded test coverage, and introduced performance-oriented enhancements that enable scalable, reliable simulations of porous media with improved developer maintainability.

May 2025 - cadet/CADET-Core: Delivered targeted improvements to CI testing, established naming consistency for DG modules, and simplified discretization options by deprecating the DGSEM collocation variant. No major bugs fixed this month; focus on reliability, maintainability, and development velocity. These changes strengthen business value by improving test coverage, reducing confusion in discretization terminology, and streamlining the feature set for faster iteration.

April 2025 (2025-04) performance review for cadet/CADET-Core focusing on crystallization: Delivered a unified crystallization framework by consolidating PBM, aggregation, and breakage into a single architecture. Refactored CrystallizationReaction to enable caching and multiple reconstruction schemes, boosting runtime efficiency and flexibility. Introduced validation checks to guard against misconfigurations in aggregation parameters, reducing risk of invalid simulations. Enhanced documentation and improved test stability for crystallization and precipitation, including updates to population balances documentation and FD Jacobian test tolerance to mitigate false negatives from numerical challenges. Overall, these efforts reduce maintenance costs, improve simulation accuracy, and enhance developer experience, while delivering tangible business value in reliability, performance, and clarity of the CADET-Core crystallization workflows.

March 2025 monthly summary focused on improving onboarding and installation experience for CADET-Core. Delivered a comprehensive update to Getting Started and Installation Documentation for CADET-Core and its frontend, clarifying installation steps and usage. Added new sections for installation and tutorials to accelerate onboarding and reduce setup time. Work is linked to commit eb75368dd4090e2d2a16e3bcc12c1d730f279734 for traceability.

January 2025 — cadet/CADET-Core: Code cleanup and performance optimization in Lumped Rate Model with Pores. Removed unused CADET_PARFOR_END macro to fix compile-time issues and prevent build-time errors in multithreaded configurations; added optional Intel TBB-based parallelization for 2D Lumped Rate Model with Pores to improve multi-core throughput. These changes reduce build fragility, improve runtime performance where enabled, and demonstrate strong code maintenance and performance engineering.

2024-12 monthly summary for cadet/CADET-Core: Delivered major feature expansions in DG modeling, improved release reliability, and fixed critical runtime issues. Consolidated the release process with a unified workflow, release checklist, and a version bump to v5.0.3, complemented by automated release tests. Expanded modeling capabilities with 2D DG convection-dispersion and LRMP (DG-based), plus enhancements to the DG toolbox for coordinates, stiffness matrices, and readability. Addressed stability and parallel-runtime robustness by fixing solid-volume calculations and adding a guard against unsafe multi-threading when parallel code is disabled. This combination accelerates releases, broadens simulation coverage, and improves robustness in production environments.

November 2024 focused on elevating CADET-Core documentation quality and consistency to improve usability for users and contributors, with targeted enhancements that align with publication standards and governance. The work delivered a centralized, standardized documentation framework and citation approach, setting the stage for scalable knowledge sharing and easier onboarding.

October 2024: Cadet/CADET-Core — Key deliverable was the CADET Verification Documentation Update transitioning guidance from CADET-Reference to CADET-Verification and updating developer guides to reflect the new verification framework. This ensured accurate testing procedures for model verification. No major bugs fixed this month. Impact: clearer testing processes, faster onboarding, and better alignment with current verification standards, contributing to improved product quality and maintainability. Technologies/skills demonstrated: technical writing, Git-based version control, documentation governance, cross-team collaboration on verification standards. Business value: reduces misconfigurations, accelerates QA cycles, and supports smoother adoption of CADET-Verification.

January 2024: Delivered General Rate Model 2D (GRM2D) enhancements in cadet/CADET-Core: a new Model Builder with discretization options and a registration path to unlock simulation usage. This enables users to configure 2D GRM discretization choices and register models for simulations, improving accuracy, flexibility, and time-to-value for engineers running 2D GRM scenarios. No major bugs fixed this month; focus was on feature delivery and integration. Overall impact: more adaptable 2D GRM workflows, improved simulation repeatability, and a solid foundation for future GRM expansion. Technologies demonstrated: model-builder architecture, discretization method integration, model registration flow, and git-based change tracking.