Changes in version 0.1.1                        

Resubmission of 0.1.0, which CRAN returned for changes in February 2026.

Bug fixes

  - Covariates observed in only some pre-treatment years are aggregated
    over the observed years. Previously mean() received the missing
    values, the feature became NA, and it was dropped without a message,
    so a specification meant to match on many covariates could keep only
    one.
  - Placebo inference keeps control units whose names contain spaces,
    hyphens or periods. Previously these units were silently left out of
    the placebo distribution.
  - Two-sided placebo p-values (expected_direction = "two_sided") rank
    units by absolute effect. Previously the unit with the largest
    effect received p = 0.
  - Outcome models no longer share one mutable synthetic-control fit
    (the augmented SCM model altered the fit used by the others), and
    ridge/lasso cross-validation folds are deterministic.
  - run_spec_curve_analysis() passes cores to spec_curve(), which
    previously ran single-threaded unless params contained its own cores
    entry.
  - Parallel workers run the same SCMs code as the calling session (fork
    clusters on Unix); on Windows, a mismatch with the installed package
    is an error.

Silent failures are now errors

  - A failed placebo run stops with the unit's name instead of being
    skipped.
  - scdata() names donors that have no pre-treatment data instead of
    failing with an unrelated error.
  - Ridge penalty estimation stops instead of falling back to default
    values.
  - plot_spec_curve() stops when SHAP values do not cover the
    specification grid.

Changes

  - expected_direction defaults to "two_sided" in inference_sc(),
    inference_placebo(), spec_curve() and run_spec_curve_analysis().
  - New curve-level statistic curve_stat = "median_tau" (signed median).
    One-sided curve-level tests (two_sided = FALSE) require it, because
    the other statistics are non-negative.
  - scest() exposes the inner interior-point solver tolerances
    (margin.ipop, sigf.ipop, bound.ipop).
  - SHAP attribution encodes every level of each categorical
    specification choice.
  - plot_spec_curve() always draws Panel B labels as rich text
    (richtext_feature_labels is removed) and no longer prints SHAP merge
    diagnostics.
  - Requires 'CVXR' 1.9.0 or later, which replaced solve() with
    psolve(). 'ECOSolveR' is now imported directly, because 'CVXR' no
    longer provides the default ECOS solver.