postshock 0.2.1

Fixes

• Forward explicit PCA settings from SynthPrediction() to dbw(), including the MultiPool dispatcher. Validate dimensions against the available SVD directions. Explicit PCA failures, unsuccessful or unknown DBW status, and invalid weights now produce errors instead of silently substituting equal weights; the default NULL and disabled-DBW paths remain.
• Forward all shared model, matching, penalty, seasonal and control settings through the MultiPool dispatcher. Reject conflicting settings while preserving separate baseline/pool DBW switches and unnormalized pool weights.
• Require complete, finite, aligned inputs when additional donor ARIMAX covariates are selected. Report invalid rows and available dates rather than deleting covariate rows and misaligning responses. Other input-policy branches retain their existing behavior.
• Restrict automatic GARCH-X selection to fits with numerical convergence code zero, finite nonempty coefficients and finite BIC. Preserve the first eligible fit on exact BIC ties; report an error if none qualifies. Backcast refits must meet the same conditions and strictly improve BIC. Non-finite standard errors alone do not disqualify a point fit.
• Pass the specified or detected per-window period to automatic ARIMA’s response frequency, with strict validation of explicit periods. Retain the non-seasonal ARIMA(1,1,1) donor failure fallback.
• Correct and align documentation for GARCH-X order c(q, p, o): q is GARCH, p is ARCH, and o is the asymmetry order.

Reproducibility

• Add aapl_s1_input, derived from the unchanged frozen Apple objects, with evaluation observations separate from fitting and matching inputs.
• Install the Apple input builder, shared analysis and version/function-body identity checks under replication/. The Technical Report uses these installed resources and executable results without an adjacent manuscript.
• Hash replication function bodies as UTF-8 bytes with fixed LF line endings, avoiding false implementation-mismatch errors on Windows. Retain the version, implementation-identity and numerical checks.

Compatibility

Public function signatures and existing frozen data are unchanged. Previously ignored explicit settings may now change forecasts; invalid donor ARIMAX inputs, failed explicit PCA requests and ineligible automatic GARCH-X fits can now produce errors. These corrections preserve the article’s existing main application specifications.