Data, code and redacted pre-registrations for: The seed-amplitude dependence of the winding density changes sign after the linear stage in an undamped two-dimensional Abelian-Higgs quench at critical coupling

Reproduction package for the paper "The seed-amplitude dependence of the winding density changes sign after the linear stage in an undamped two-dimensional Abelian-Higgs quench at critical coupling" (A. Zalutsky, 2026). It contains the simulation and analysis code (the registered code unchanged except comments and docstrings; post hoc analysis scripts and release tooling labelled as such), every run record with its side-car arrays, the evaluations and sealed calibration bands, and redacted pre-registrations of the main study, its robustness tests and the predecessor flux-trapping study, plus the predecessor's redacted report. Redactions are marked in place and listed in REDACTION_LOG.md with the sha256 of every unredacted source; where redacted process text bears on run selection or execution, a labelled editorial summary preserves the fact. Start with README.md: it gives exact commands that reproduce the paper's headline number, tables and figures from the records. Licences: MIT for code, CC BY 4.0 for data and documents (see LICENSES.md).