diff --git a/man-roxygen/model-common-args.R b/man-roxygen/model-common-args.R
index baf67777..ca609ebe 100644
--- a/man-roxygen/model-common-args.R
+++ b/man-roxygen/model-common-args.R
@@ -56,10 +56,11 @@
 #'   method.
 #'
 #' @param output_dir (string) A path to a directory where CmdStan should write
-#'   its output CSV files. For interactive use this can typically be left at
-#'   `NULL` (temporary directory) since CmdStanR makes the CmdStan output
-#'   (posterior draws and diagnostics) available in \R via methods of the fitted
-#'   model objects. The behavior of `output_dir` is as follows:
+#'   its output CSV files. For MCMC there will be one file per chain; for other
+#'   methods there will be a single file. For interactive use this can typically
+#'   be left at `NULL` (temporary directory) since CmdStanR makes the CmdStan
+#'   output (posterior draws and diagnostics) available in \R via methods of the
+#'   fitted model objects. The behavior of `output_dir` is as follows:
 #'   * If `NULL` (the default), then the CSV files are written to a temporary
 #'   directory and only saved permanently if the user calls one of the `$save_*`
 #'   methods of the fitted model object (e.g.,
diff --git a/man/model-method-diagnose.Rd b/man/model-method-diagnose.Rd
index dff6359c..9a0acd31 100644
--- a/man/model-method-diagnose.Rd
+++ b/man/model-method-diagnose.Rd
@@ -64,10 +64,11 @@ number of chains) when called to generate the initial values. See
 }}
 
 \item{output_dir}{(string) A path to a directory where CmdStan should write
-its output CSV files. For interactive use this can typically be left at
-\code{NULL} (temporary directory) since CmdStanR makes the CmdStan output
-(posterior draws and diagnostics) available in \R via methods of the fitted
-model objects. The behavior of \code{output_dir} is as follows:
+its output CSV files. For MCMC there will be one file per chain; for other
+methods there will be a single file. For interactive use this can typically
+be left at \code{NULL} (temporary directory) since CmdStanR makes the CmdStan
+output (posterior draws and diagnostics) available in \R via methods of the
+fitted model objects. The behavior of \code{output_dir} is as follows:
 \itemize{
 \item If \code{NULL} (the default), then the CSV files are written to a temporary
 directory and only saved permanently if the user calls one of the \verb{$save_*}
diff --git a/man/model-method-generate-quantities.Rd b/man/model-method-generate-quantities.Rd
index c9173c30..bf25602e 100644
--- a/man/model-method-generate-quantities.Rd
+++ b/man/model-method-generate-quantities.Rd
@@ -58,10 +58,11 @@ transformed data and the goal is to generate \emph{different} data for each
 chain.}
 
 \item{output_dir}{(string) A path to a directory where CmdStan should write
-its output CSV files. For interactive use this can typically be left at
-\code{NULL} (temporary directory) since CmdStanR makes the CmdStan output
-(posterior draws and diagnostics) available in \R via methods of the fitted
-model objects. The behavior of \code{output_dir} is as follows:
+its output CSV files. For MCMC there will be one file per chain; for other
+methods there will be a single file. For interactive use this can typically
+be left at \code{NULL} (temporary directory) since CmdStanR makes the CmdStan
+output (posterior draws and diagnostics) available in \R via methods of the
+fitted model objects. The behavior of \code{output_dir} is as follows:
 \itemize{
 \item If \code{NULL} (the default), then the CSV files are written to a temporary
 directory and only saved permanently if the user calls one of the \verb{$save_*}
diff --git a/man/model-method-laplace.Rd b/man/model-method-laplace.Rd
index 2601f558..b033fbe3 100644
--- a/man/model-method-laplace.Rd
+++ b/man/model-method-laplace.Rd
@@ -79,10 +79,11 @@ number of chains) when called to generate the initial values. See
 \item{save_latent_dynamics}{Ignored for this method.}
 
 \item{output_dir}{(string) A path to a directory where CmdStan should write
-its output CSV files. For interactive use this can typically be left at
-\code{NULL} (temporary directory) since CmdStanR makes the CmdStan output
-(posterior draws and diagnostics) available in \R via methods of the fitted
-model objects. The behavior of \code{output_dir} is as follows:
+its output CSV files. For MCMC there will be one file per chain; for other
+methods there will be a single file. For interactive use this can typically
+be left at \code{NULL} (temporary directory) since CmdStanR makes the CmdStan
+output (posterior draws and diagnostics) available in \R via methods of the
+fitted model objects. The behavior of \code{output_dir} is as follows:
 \itemize{
 \item If \code{NULL} (the default), then the CSV files are written to a temporary
 directory and only saved permanently if the user calls one of the \verb{$save_*}
diff --git a/man/model-method-optimize.Rd b/man/model-method-optimize.Rd
index 9513db9f..dcf77444 100644
--- a/man/model-method-optimize.Rd
+++ b/man/model-method-optimize.Rd
@@ -93,10 +93,11 @@ temporary files created when \code{save_latent_dynamics=TRUE} see the
 method.}
 
 \item{output_dir}{(string) A path to a directory where CmdStan should write
-its output CSV files. For interactive use this can typically be left at
-\code{NULL} (temporary directory) since CmdStanR makes the CmdStan output
-(posterior draws and diagnostics) available in \R via methods of the fitted
-model objects. The behavior of \code{output_dir} is as follows:
+its output CSV files. For MCMC there will be one file per chain; for other
+methods there will be a single file. For interactive use this can typically
+be left at \code{NULL} (temporary directory) since CmdStanR makes the CmdStan
+output (posterior draws and diagnostics) available in \R via methods of the
+fitted model objects. The behavior of \code{output_dir} is as follows:
 \itemize{
 \item If \code{NULL} (the default), then the CSV files are written to a temporary
 directory and only saved permanently if the user calls one of the \verb{$save_*}
diff --git a/man/model-method-pathfinder.Rd b/man/model-method-pathfinder.Rd
index db3185a3..85fc9236 100644
--- a/man/model-method-pathfinder.Rd
+++ b/man/model-method-pathfinder.Rd
@@ -98,10 +98,11 @@ temporary files created when \code{save_latent_dynamics=TRUE} see the
 method.}
 
 \item{output_dir}{(string) A path to a directory where CmdStan should write
-its output CSV files. For interactive use this can typically be left at
-\code{NULL} (temporary directory) since CmdStanR makes the CmdStan output
-(posterior draws and diagnostics) available in \R via methods of the fitted
-model objects. The behavior of \code{output_dir} is as follows:
+its output CSV files. For MCMC there will be one file per chain; for other
+methods there will be a single file. For interactive use this can typically
+be left at \code{NULL} (temporary directory) since CmdStanR makes the CmdStan
+output (posterior draws and diagnostics) available in \R via methods of the
+fitted model objects. The behavior of \code{output_dir} is as follows:
 \itemize{
 \item If \code{NULL} (the default), then the CSV files are written to a temporary
 directory and only saved permanently if the user calls one of the \verb{$save_*}
diff --git a/man/model-method-sample.Rd b/man/model-method-sample.Rd
index ce21c60c..526c9c88 100644
--- a/man/model-method-sample.Rd
+++ b/man/model-method-sample.Rd
@@ -111,10 +111,11 @@ temporary files created when \code{save_latent_dynamics=TRUE} see the
 method.}
 
 \item{output_dir}{(string) A path to a directory where CmdStan should write
-its output CSV files. For interactive use this can typically be left at
-\code{NULL} (temporary directory) since CmdStanR makes the CmdStan output
-(posterior draws and diagnostics) available in \R via methods of the fitted
-model objects. The behavior of \code{output_dir} is as follows:
+its output CSV files. For MCMC there will be one file per chain; for other
+methods there will be a single file. For interactive use this can typically
+be left at \code{NULL} (temporary directory) since CmdStanR makes the CmdStan
+output (posterior draws and diagnostics) available in \R via methods of the
+fitted model objects. The behavior of \code{output_dir} is as follows:
 \itemize{
 \item If \code{NULL} (the default), then the CSV files are written to a temporary
 directory and only saved permanently if the user calls one of the \verb{$save_*}
diff --git a/man/model-method-sample_mpi.Rd b/man/model-method-sample_mpi.Rd
index 8b0c3ddb..ca7203da 100644
--- a/man/model-method-sample_mpi.Rd
+++ b/man/model-method-sample_mpi.Rd
@@ -110,10 +110,11 @@ temporary files created when \code{save_latent_dynamics=TRUE} see the
 method.}
 
 \item{output_dir}{(string) A path to a directory where CmdStan should write
-its output CSV files. For interactive use this can typically be left at
-\code{NULL} (temporary directory) since CmdStanR makes the CmdStan output
-(posterior draws and diagnostics) available in \R via methods of the fitted
-model objects. The behavior of \code{output_dir} is as follows:
+its output CSV files. For MCMC there will be one file per chain; for other
+methods there will be a single file. For interactive use this can typically
+be left at \code{NULL} (temporary directory) since CmdStanR makes the CmdStan
+output (posterior draws and diagnostics) available in \R via methods of the
+fitted model objects. The behavior of \code{output_dir} is as follows:
 \itemize{
 \item If \code{NULL} (the default), then the CSV files are written to a temporary
 directory and only saved permanently if the user calls one of the \verb{$save_*}
diff --git a/man/model-method-variational.Rd b/man/model-method-variational.Rd
index 6b894b74..3678f11e 100644
--- a/man/model-method-variational.Rd
+++ b/man/model-method-variational.Rd
@@ -94,10 +94,11 @@ temporary files created when \code{save_latent_dynamics=TRUE} see the
 method.}
 
 \item{output_dir}{(string) A path to a directory where CmdStan should write
-its output CSV files. For interactive use this can typically be left at
-\code{NULL} (temporary directory) since CmdStanR makes the CmdStan output
-(posterior draws and diagnostics) available in \R via methods of the fitted
-model objects. The behavior of \code{output_dir} is as follows:
+its output CSV files. For MCMC there will be one file per chain; for other
+methods there will be a single file. For interactive use this can typically
+be left at \code{NULL} (temporary directory) since CmdStanR makes the CmdStan
+output (posterior draws and diagnostics) available in \R via methods of the
+fitted model objects. The behavior of \code{output_dir} is as follows:
 \itemize{
 \item If \code{NULL} (the default), then the CSV files are written to a temporary
 directory and only saved permanently if the user calls one of the \verb{$save_*}