SUPPLEMENTARY DATA PACKAGE

The synthetic dataset and all derived data files supporting this methodological demonstration are provided in the Supplementary Information accompanying this article. The supplementary package contains the fixed-seed synthetic record-level dataset, construct descriptives, correlation matrix, model coefficients, prediction surface, platform and weekly summaries, theme summaries, measurement audit, robustness summary, and a data-provenance note. No confidential, participant-level, or real-user data were used.

Evidence boundary
All records and derived outputs in this package are synthetic and were created for a fixed-seed methodological demonstration. They are not observations of platform users, survey respondents, private messages, or human participants.
