| acorr_diagnostics | Autocorrelation diagnostics for residuals |
| afni_restricted_plan | Build an AFNI-style restricted AR plan from root parameters |
| fit_noise | Fit an AR/ARMA noise model (run-aware) and return a whitening plan |
| print.fmriAR_plan | Pretty-print an fmriAR whitening plan |
| sandwich_from_whitened_resid | GLS standard errors from whitened residuals |
| whiten | Fit and apply whitening in one call |
| whiten_apply | Apply a whitening plan to design and data matrices |