Changes in version 0.1.1 (2026-06-29) - Update Zenodo DOI to 10.5281/zenodo.20724550 (version 0.1.1 archive). Changes in version 0.1.0 Initial CRAN release. New features - prior_fraction() computes the per-group prior fraction (pooling or shrinkage factor) for hierarchical models. Accepts a brmsfit object directly, or a manual path supplying prior precision and likelihood information for any other fitting engine (Stan, JAGS, etc.). Supports gaussian, bernoulli, binomial, poisson, and negbinomial families. Has print and plot methods. - smoothbp_advisor() reports the same Fisher information decomposition for changepoint random effects in smoothbp fits, and recommends centred vs. non-centred parameterisation per group. Has print and plot methods. Notes The underlying geometry (analytic connection, curvature, chain-level coupling diagnostic, and experimental samplers) is reproduction code for the companion paper and lives in the source repository's paper/ directory rather than in the installed package.