September 2025 performance summary for fpsim/fpsim and starsimhub/starsim. Delivered foundational architecture and data pipelines, completed modularization of data loading, restructured and refactored pars-related code (including migration and removal), extended task orchestration with Run All, and enhanced observability with loading state management and warnings. Addressed stability and correctness via a broad set of bug fixes across parsing, configuration, verbose logging, and date handling. Result: more reliable data processing, faster end-to-end runs, reduced maintenance burden, and clearer change tracking through a consolidated changelog.

August 2025 performance summary: Delivered substantial architectural improvements and a broad set of feature enhancements across fpsim/fpsim and starsimhub/starsim, driving modularity, reproducibility, and faster decision support for stakeholders. The team completed major refactoring to modularize data flows, introduced new modules and improved sorting, expanded default configurations, and exposed simulation results for downstream analytics and benchmarking. A batch-run workflow and enhanced experiment configuration and calibration capabilities enable scalable, repeatable experiments and faster iteration cycles. Reliability and quality improvements were achieved via test infrastructure updates, cleanup of deprecated methods, and targeted fixes to ensure stability of plots, tests, and domain-specific validations. Baseline computations, visualization enhancements, and documentation updates improve reproducibility and decision-quality across models. Top 5 achievements for the month include the following feature deliveries and structural improvements, with representative commits shown for traceability: - Code Restructuring and Data Flow Reorganization to modularize FP parsers and relocate data components (commits: fff229b17b03b7777b6928029fa86849f21cf077; de94b86888ac0b29c275a501ef7e3e59ccb8d0f5; 2490359b52d90c040eda8103a985be564e712347; dc976a215e7c571b1df9b926c03668c4e73a9aa9; 433cafef6b304eca39f1798e3a8e621c9f45ae52; 4423165643a5af0e1831745ecea789cd3bcc127c). - Module Support Addition and Result Sorting Enhancements to improve data processing and presentation (commits: 40e21f618aa481c7bf470c62a9db7e73a381e3c8; 8ba88886b9aad159700878737c5708feacb251bb). - Simulation Results Integration and Comparative Analytics enabling downstream analytics and batch experiments (commits: 8d9ed60f9334afde35dc04cef3b8cd79aed9ed01; fabf1a2e11276601a69fe09f67c550a6447d6256; 098180a44d60f77ce5a1755d0185d33a997f84f4; 1bd660d6b5ad863ba3a36e0a880021b035a9cfb4; fa93492d65c417ea88727182c355c00535cd2a5d; 1ca8cf3edf9b0298d1204d1ee53e656bcbe3e32d). - Reliability and Quality Improvements through test infrastructure updates, cleanup of deprecated methods, and stability fixes (commits: 030687cfbefecdd6e0a2157f15d5b0af33723638; 7cff52c2746cac0b9879c47d084fb56a5fd97afe; f79f51d857e7fea791f34e48aaac4443bf6bba43; 5723e2514a61abda5e452f525a57e8fb7f8023bd; 9c37a3e456e91c2b0223b58f920f5ce636064da9). - Baseline reproducibility and visualization enhancements including calibration visuals and plotting controls (commits: 1454edd6a42230b3776421313103d43b8a2d369f; f92772d6aafd8a4f2708b6b8a27869782bf0d7e1; 7f2fcea8563b9dacf395c7902a3f0b2c357fd8f3).

July 2025 performance summary for fpsim/fpsim and starsimhub/starsim. Focused on reliability, performance analytics, and developer productivity. Key progress includes a robust test execution workflow enabling full test runs, reruns, and parallel execution; stabilization of parallel tests with initialization and update-correctness fixes; a new longitudinal testing and age-diff capability; and the introduction of a time-series results infrastructure with updated baselines. Substantial code-quality improvements and configuration hygiene were completed to accelerate delivery and reduce risk. On the analytics side, plotting and parameter handling were enhanced (lognormal support, refactors, and location unwrapping). In starsim, beta distribution classes (beta and beta_mean) were added to broaden statistical modeling capabilities. Overall, these changes deliver faster, more reliable feedback loops, more robust baselines, and stronger data-driven decision making for product and research teams.

June 2025 monthly summary for starsimhub/starsim: Delivered Pregnancy parity tracking within Pregnancy demographics, enabling explicit tracking of the number of pregnancies and reproductive history in the simulation. Parity is initialized to 0 by default and increments automatically upon delivery, supporting more accurate demographic modeling and forecasting. No core bugs reported this month; changes are focused on data model enrichment with low risk of regressions. Improved data fidelity and analytics readiness for demographic forecasting in health simulations.

May 2025 monthly work summary focusing on key accomplishments in starsim. Implemented population removal and emigration tracking to improve population dynamics fidelity and analytics. Key changes include adding ti_removed to People, updating step_die to account for deaths and removals, generalizing remove_dead to handle agents exiting population, and introducing new_emigrants result to track removals. Commit 46e1bbddea3f1446adb2c45aa7496b9a77acef48 (people proptieries).

March 2025 performance summary for fpsim/fpsim and starsimhub/starsim. Delivered a broad architecture refactor across fpsim/fpsim to improve modularity and performance, including decoupling plotting, parallelization, and module switching, while cleaning up imports and aligning baselines. Strengthened the test suite with expanded coverage, stability fixes, scenario/test education additions, and reinstitution of previously removed tests to boost reliability. Hardened the data pipeline and baseline synchronization, prepared new model coefficients, and updated data assets to support upcoming experiments. Deprecated the plotting subsystem to reduce maintenance surface and focus on data-centric workflows, while continuing to advance data provisioning (country data files) and CSV export readiness. Added documentation and tutorials improvements to expedite onboarding; in starsimhub/starsim, standardized tutorial notebooks’ environments and refined progress output to improve presentation and reproducibility of simulations.

February 2025 FPSIM: Reorganized repository structure, expanded test infrastructure, and introduced region-aware checks and performance improvements. Focused on maintainability, test reliability, and scalable execution across datasets.

January 2025: Delivered cross-repo improvements across starsimhub/starsim and fpsim/fpsim, focusing on accuracy, test reliability, and empowerment-enabled simulations. Key outcomes include enhanced demographic result summarization, corrected yearly aggregation unit mapping, expanded empowerment-enabled simulations, improved change_people_state interventions with robust tests, and streamlined test suites and configurations to accelerate validation while preserving fidelity. These changes improve analytics accuracy, reduce maintenance costs, and enable faster iteration on simulation scenarios across both repositories.

Concise monthly summary for 2024-12 covering the starsimhub/starsim repo. The month focused on delivering core data handling improvements for simulation results, refactoring for maintainability, stabilizing testing, and minor release housekeeping. The work lays the foundation for more robust analytics and easier future contributions.

November 2024 monthly summary for starsimhub/starsim: Delivered critical hardening of calibration input validation and improved error handling to enhance the reliability of the calibration workflow. Replaced outdated 'conform' references with nll_fn and ensured validation supports both string and callable forms, reducing runtime errors and enabling safer reconfiguration of calibration parameters.

Monthly summary for 2024-10 focusing on business value and technical achievements in fpsim/fpsim.