November 2024 performance summary for os-climate repositories (witness-energy, witness-core). Delivered a comprehensive overhaul of the investment modeling framework across wind, hydro, anaerobic digestion, and other renewables, incorporating BSpline interpolation, trust-constr optimization, and increased discretization. Implemented per-run initialization to ensure invest_before_year_start is correctly updated and improved input handling. Achieved IEA NZE-aligned calibration for hydropower, wind, and anaerobic digestion with updated investments and initial parameters. Updated production data and refreshed Jacobian and pkl artifacts to maintain model accuracy. Strengthened code quality and test infrastructure with linting, test initializations, and test mode enhancements. Result: more accurate, transparent, and stable investment forecasts with improved reproducibility and faster iteration cycles.

October 2024: Delivered NZE-aligned investment modeling enhancements across witness-energy and witness-core, consolidating hydro, wind, and biogas calibration under a single, target-driven framework and improving data handling, visualization, and reliability. Implemented pre-start biogas investment modeling, refined data ingestion, and updated production factors to better reflect IEA NZE scenario targets (2020-2050). Resolved a core loading bug and corrected hydropower reporting, improving accuracy and trust in results. The work strengthens scenario planning, enables more precise investment trade-offs, and enhances stakeholder-facing dashboards with smoother, more accurate trend visualization.