Reproducibility package for: Temporal robustness of Thomas–Fiering stochastic streamflow generation under expanding observational records

Reproducibility package supporting the manuscript “Temporal robustness of Thomas–Fiering stochastic streamflow generation under expanding observational records”. The archive contains the analysis-ready monthly streamflow dataset for seven Peruvian gauging stations over the common 1978–2017 period, station metadata and data dictionary, R scripts implementing the complete Thomas–Fiering analysis workflow, and the supplementary material in both reader-ready and machine-readable formats. The experimental design includes a 20-year calibration (TF20; 1978–1997) followed by independent retrospective evaluation during 1998–2017, a 40-year calibration (TF40; 1978–2017), comparison of TF20 and TF40 stochastic representations over the common 2018–2037 prospective horizon, a stationary Monte Carlo control based on 2,000 pseudo-series per station, and a targeted quality-control sensitivity analysis for Las Minas. The deposited monthly dataset is the analysis-ready input used by the computational workflow. Original daily streamflow observations are not redistributed and remain available from the Autoridad Nacional del Agua (ANA) Visor por Cuenca platform. Generated intermediate and final code outputs are not archived because they can be reproduced by running the supplied scripts. The Supplementary Information PDF is included together with individual supplementary tables and figures.