Data and code for "Causal thermal memory reorganizes mode selection and Hopf criticality in a reduced Langmuir-ion-acoustic plasma model"

This record contains the numerical data, analysis code, figure-generation scripts, and manuscript source supporting the study “Causal thermal memory reorganizes mode selection and Hopf criticality in a reduced Langmuir-ion-acoustic plasma model.” The archived workflow reproduces the reduced-model neutral curves, stationary–Hopf switching threshold, O(2) cubic couplings, generalized-Hopf coefficient, traveling-wave continuation, parameter and causal-kernel robustness audits, Fourier–Hermite moment calibration, two-dimensional reduced-PDE tests, and inlet–outlet convective–absolute diagnostics. The record distinguishes three levels of evidence used in the manuscript: results exact within the reduced model or normalized passive-kernel class; structures that persist under stated nondegeneracy conditions and finite robustness tests; and quantitative finite-amplitude values that require closure calibration. It contains no full velocity-grid Vlasov–Fokker–Planck data and no newly generated particle-in-cell data. The kinetic comparison is the documented 27-moment Fourier–Hermite benchmark. Processed production trajectories are included so that the reported figures can be regenerated without rerunning the longest simulations.