diff --git a/R/gpd.R b/R/gpd.R
index 3c98521..3cffd77 100644
--- a/R/gpd.R
+++ b/R/gpd.R
@@ -53,6 +53,7 @@ qgeneralized_pareto <- function(p, mu = 0, sigma = 1, k = 0, lower.tail = TRUE,
 #' Zhang, J., and Stephens, M. A. (2009). A new and efficient estimation method
 #' for the generalized Pareto distribution. *Technometrics* **51**, 316-325.
 #'
+#' @noRd
 gpdfit <- function(x, wip = TRUE, min_grid_pts = 30, sort_x = TRUE) {
   # see section 4 of Zhang and Stephens (2009)
   if (sort_x) {
diff --git a/R/pareto_smooth.R b/R/pareto_smooth.R
index e9b558f..e5f1aff 100644
--- a/R/pareto_smooth.R
+++ b/R/pareto_smooth.R
@@ -637,6 +637,7 @@ ps_tail_length <- function(ndraws, r_eff, ...) {
 #' @param are_weights (logical) are the diagnostics for weights
 #' @param ... unused
 #' @return diagnostic message
+#' @noRd
 pareto_k_diagmsg <- function(diags, are_weights = FALSE, ...) {
   khat <- diags$khat
   min_ss <- diags$min_ss
diff --git a/man/ps_convergence_rate.Rd b/man/ps_convergence_rate.Rd
new file mode 100644
index 0000000..535f0eb
--- /dev/null
+++ b/man/ps_convergence_rate.Rd
@@ -0,0 +1,32 @@
+% Generated by roxygen2: do not edit by hand
+% Please edit documentation in R/pareto_smooth.R
+\name{ps_convergence_rate}
+\alias{ps_convergence_rate}
+\title{Pareto convergence rate}
+\usage{
+ps_convergence_rate(k, ndraws, ...)
+}
+\arguments{
+\item{k}{pareto-k values}
+
+\item{ndraws}{number of draws}
+
+\item{...}{unused}
+}
+\value{
+convergence rate
+}
+\description{
+Given number of draws and scalar or array of k's, compute the
+relative convergence rate of PSIS estimate RMSE. See Appendix B of
+Vehtari et al. (2024). This function is exported to be usable by
+other packages. For user-facing diagnostic functions, see
+\code{\link{pareto_convergence_rate}} and \code{\link{pareto_diags}}.
+}
+\seealso{
+Other helper-functions: 
+\code{\link{ps_khat_threshold}()},
+\code{\link{ps_min_ss}()},
+\code{\link{ps_tail_length}()}
+}
+\concept{helper-functions}
diff --git a/man/ps_khat_threshold.Rd b/man/ps_khat_threshold.Rd
new file mode 100644
index 0000000..d82ebcb
--- /dev/null
+++ b/man/ps_khat_threshold.Rd
@@ -0,0 +1,31 @@
+% Generated by roxygen2: do not edit by hand
+% Please edit documentation in R/pareto_smooth.R
+\name{ps_khat_threshold}
+\alias{ps_khat_threshold}
+\title{Pareto k-hat threshold}
+\usage{
+ps_khat_threshold(ndraws, ...)
+}
+\arguments{
+\item{ndraws}{number of draws}
+
+\item{...}{unused}
+}
+\value{
+threshold
+}
+\description{
+Given number of draws, computes khat threshold for reliable Pareto
+smoothed estimate (to have small probability of large error). See
+section 3.2.4, equation (13) of Vehtari et al. (2024). This
+function is exported to be usable by other packages. For
+user-facing diagnostic functions, see \code{\link{pareto_khat_threshold}} and
+\code{\link{pareto_diags}}.
+}
+\seealso{
+Other helper-functions: 
+\code{\link{ps_convergence_rate}()},
+\code{\link{ps_min_ss}()},
+\code{\link{ps_tail_length}()}
+}
+\concept{helper-functions}
diff --git a/man/ps_min_ss.Rd b/man/ps_min_ss.Rd
new file mode 100644
index 0000000..533cfa3
--- /dev/null
+++ b/man/ps_min_ss.Rd
@@ -0,0 +1,30 @@
+% Generated by roxygen2: do not edit by hand
+% Please edit documentation in R/pareto_smooth.R
+\name{ps_min_ss}
+\alias{ps_min_ss}
+\title{Pareto-smoothing minimum sample-size}
+\usage{
+ps_min_ss(k, ...)
+}
+\arguments{
+\item{k}{pareto k value}
+
+\item{...}{unused}
+}
+\value{
+minimum sample size
+}
+\description{
+Given Pareto-k computes the minimum sample size for reliable Pareto
+smoothed estimate (to have small probability of large error). See
+section 3.2.3 in Vehtari et al. (2024). This function is exported
+to be usable by other packages. For user-facing diagnostic functions, see
+\code{\link{pareto_min_ss}} and \code{\link{pareto_diags}}.
+}
+\seealso{
+Other helper-functions: 
+\code{\link{ps_convergence_rate}()},
+\code{\link{ps_khat_threshold}()},
+\code{\link{ps_tail_length}()}
+}
+\concept{helper-functions}
diff --git a/man/ps_tail_length.Rd b/man/ps_tail_length.Rd
new file mode 100644
index 0000000..036afe3
--- /dev/null
+++ b/man/ps_tail_length.Rd
@@ -0,0 +1,30 @@
+% Generated by roxygen2: do not edit by hand
+% Please edit documentation in R/pareto_smooth.R
+\name{ps_tail_length}
+\alias{ps_tail_length}
+\title{Pareto tail length}
+\usage{
+ps_tail_length(ndraws, r_eff, ...)
+}
+\arguments{
+\item{ndraws}{number of draws}
+
+\item{r_eff}{relative efficiency}
+
+\item{...}{unused}
+}
+\value{
+tail length
+}
+\description{
+Calculate the tail length from number of draws and relative efficiency
+r_eff. See Appendix H in Vehtari et al. (2024). This function is
+used internally and is exported to be available for other packages.
+}
+\seealso{
+Other helper-functions: 
+\code{\link{ps_convergence_rate}()},
+\code{\link{ps_khat_threshold}()},
+\code{\link{ps_min_ss}()}
+}
+\concept{helper-functions}