In March 2026, fpsim/fpsim delivered automation improvements, expanded birth-spacing modeling across parous women, and laid a robust calibration infrastructure with localization across multiple geographies. The work enhances automation, modeling fidelity, and global readiness while addressing calibration stability and data-driven decision support.

January 2026 monthly summary for starsimhub/starsim: Delivered cross-component feature parity and stability improvements. Key features include BoolArr Bitwise Operators with symmetric behavior to uids, automated BoolState results for People, and Loop.plot_cpu fixes for pandas 3.0.0. Added module states handling changes, new data processing utilities, and changelog updates. These efforts improve developer ergonomics, reliability of simulation results, and data visualization stability, delivering measurable business value.

October 2025 monthly summary: Consolidated stability, localization accuracy, and tooling enhancements across starsim and fpsim. Implemented critical initialization ordering fix in Starsim, overhauled the FPSIM location system with robust tooling and tests, tuned locale-specific parameters for Côte d'Ivoire, and standardized data types in birth spacing to prevent downstream issues. These changes reduce runtime errors, improve simulation fidelity, and streamline deployment and maintenance.

Month: 2025-09 — Two primary work streams: FPsim location handling and fpsim plotting reliability. Delivered standardized FPsim location parameter loading across all locations with explicit location requirements, recursive merging for partial dictionaries, improved error handling, and updated tutorials/documentation. Also fixed plotting quality in fpsim: MCPR UN data x-axis handling, time vector access, re-enabled ASFR plots, corrected axis units in calibration plotting, and addressed a plot_method_mix bug; version and changelog updated. Impact: improved data visualization accuracy, reproducibility across geographic contexts, and overall reliability; reduced misconfiguration risk; better onboarding and maintainability. Technologies/skills demonstrated: Python refactoring, test-driven development, recursive dictionary merging, enhanced error handling, plotting fixes, and comprehensive documentation updates.

In August 2025, FPSIM delivered core modeling and time-handling enhancements, improving simulation accuracy, robustness, and maintainability. Key refactors include explicit boolean state representations, time-aware calculations (ti_to_debut), and streamlined distribution integration with Starsim objects. The release also standardized versioning and documentation, enhancing reproducibility and onboarding.

2025-07 FPSIM monthly summary: Delivered two major streams: (1) MMBA Analyzer reliability improvements improving data processing correctness and test coverage; (2) Release 3.0.1 introducing default verbosity silencing, with corresponding doc and tutorial updates. This cycle included code cleanups (rename results to mmba_results), path reference fixes, removal of legacy use_subnational logic, and a regression test (test_method_mix_by_age).

June 2025 performance summary for fpsim/fpsim: Delivered a major core API overhaul, added longitudinal history tracking, stabilized release infrastructure, and fixed critical simulation data issues. This work improves performance, consistency, and business value by enabling faster feature delivery and more accurate simulations.

April 2025 (fpsim/fpsim) Monthly Summary: Focused on stability, performance, and maintainability to accelerate research cycles and ensure reliable results across simulations and analyses. Key features delivered: - Test suite improvements: expanded coverage for test_change_people_state, test_scenarios, and test_integration; enhanced robustness and CI readiness. - Interventions refactor: migrated to ss.Intervention base class and removed the older fpsim Intervention dependency for easier extension and maintenance. - Initialization and defaults: added default sim keys, updated education/contraception module inits, and tightened default pars for fp_pars. - Parser consolidation: consolidated sim_pars and fp_pars into a single pars input for Sim with more consistent parameter keys. Major bugs fixed: - Fix simulation references and plotting: resolved references to sim.npts, corrected to_df and plot behavior, and addressed array-length handling when collecting results. - Post-merge fixes and miscellaneous: targeted fixes after RC2 merge and other small updates. - Age tracking fixes and death handling: corrected abortion/miscarriage age tracking and optimized death handling to remove dead agents earlier. - Plotting/visualization and structure tweaks: improved plotting scaling and aligned class structures with new version. - Tutorials and run outputs cleanup: corrected serial->parallel naming in tutorials and dropped noisy run outputs from certain t-steps. Overall impact and accomplishments: - Significantly improved reliability of tests and simulations, reducing flaky results and downtime. - Achieved faster experiment throughput via parallel execution for fp.run and streamlined parameter handling. - Refactored core components (Interventions, Multisim inheritance) for easier future maintenance and feature extension. - Enhanced data handling, plotting correctness, and baseline management to support repeatable experiments and credible results. Technologies/skills demonstrated: - Python OOP design and refactors (ss.Intervention, ss.Multisim), test engineering (pytest-like coverage), data ingestion and plotting workflows, and performance optimization through parallelization. - Baseline management, documentation improvements, and consistent parameter schemas to support scalable research pipelines.

March 2025 performance summary: FPSIM focus centered on stability, data-model enhancements, and API-friendly parameter handling, resulting in more reliable simulations and richer analytics capabilities. Cross-repo work advanced aging behavior, births handling, and monthly-duration semantics, while introducing foundational data structures and analytics features to support scalable scenario analysis. The month also strengthened testing and integration infrastructure to improve release readiness and reproducibility of results.

February 2025 FPSim monthly summary: Focused on stabilizing and expanding test coverage, reorganizing the architecture to Starsim/ss conventions, and laying groundwork for future module development. Outcome highlights include robust intervention and reproductive modeling tests, a critical results-configuration bug fix, and a major refactor to enable easier maintenance and future v3 module integration. These efforts improve reliability, maintainability, and readiness for broader deployment of contraception scenarios and state-change validations.

January 2025: Delivered DHS-based household network models for the starsim project, introducing static and evolving networks using DHS data to drive household dynamics in simulations. This work enables more realistic scenario testing and policy analysis with demographic-driven network structures.