diff --git a/DESCRIPTION b/DESCRIPTION
index af55439..86d0aca 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,6 +1,6 @@
 Package: churon
-Title: 'ONNX' Runtime Integration for R
-Version: 0.1.11
+Title: 'ONNX Runtime' Integration
+Version: 0.1.12
 Authors@R: c(
     person(given = "Chanyub", family = "Park", role = c("aut", "cre"),
            email = "mrchypark@gmail.com",
@@ -12,13 +12,14 @@ Authors@R: c(
     person(given = "Microsoft Corporation", role = "cph",
            comment = "ONNX Runtime, downloaded only on explicit user request")
     )
-Description: Provides high-performance R bindings for 'ONNX' Runtime, enabling
-    efficient machine learning model inference. Written in Rust for memory safety
+Description: Provides high-performance R bindings for 'ONNX Runtime'
+    <https://onnxruntime.ai/>, enabling efficient machine learning model inference. Written in 'Rust' for memory safety
     and speed, the package supports cross-platform model execution with multiple
     execution providers. Includes comprehensive error handling and validation,
-    with bundled 'MNIST' example model for immediate testing and prototyping.
+    with bundled MNIST example model for immediate testing and prototyping.
     Designed for production use with support for macOS (arm64), Linux (x64/arm64),
-    and Windows (x64).
+    and Windows (x64). Runtime libraries are downloaded on explicit request from
+    <https://github.com/microsoft/onnxruntime/releases>.
 License: MIT + file LICENSE
 URL: https://github.com/mrchypark/churon
 BugReports: https://github.com/mrchypark/churon/issues
diff --git a/R/install_onnx_runtime.R b/R/install_onnx_runtime.R
index a04584f..248b70d 100644
--- a/R/install_onnx_runtime.R
+++ b/R/install_onnx_runtime.R
@@ -7,27 +7,39 @@
 #' @param version Character string specifying the ONNX Runtime version to install.
 #'   Defaults to "1.29.0". Supported versions are "1.28.0" and "1.29.0";
 #'   "latest" selects "1.29.0".
+#' @param destdir Required character string naming the installation directory.
 #' @param quiet Logical. If TRUE, suppress download progress messages.
 #' @param ... Additional arguments passed to download.file()
 #'
 #' @return Invisible TRUE on success, stops with error on failure.
 #' @export
-#' @examples
-#' \dontrun{
-#' # Install ONNX Runtime
-#' install_onnx_runtime()
-#'
-#' # Install specific version
-#' install_onnx_runtime(version = "1.28.0")
-#'
-#' # Install with no output
-#' install_onnx_runtime(quiet = TRUE)
-#' }
-install_onnx_runtime <- function(version = "1.29.0", quiet = FALSE, ...) {
+#' @details
+#' This function installs external software only when explicitly called. Supply
+#' `destdir` yourself; no installation directory is selected by default.
+#' The library is placed in `destdir/lib` and configured for this R session.
+#' In later sessions, set `ORT_DYLIB_PATH` to the installed library file before
+#' loading churon. Restart R before switching an already loaded runtime.
+install_onnx_runtime <- function(
+  version = "1.29.0",
+  quiet = FALSE,
+  destdir,
+  ...
+) {
   if (!is.character(version) || length(version) != 1L || is.na(version)) {
     stop("version must be one non-missing character string.")
   }
 
+  if (
+    missing(destdir) ||
+      !is.character(destdir) ||
+      length(destdir) != 1L ||
+      is.na(destdir) ||
+      !nzchar(trimws(destdir))
+  ) {
+    stop("destdir must be supplied as one non-empty directory path.")
+  }
+  destdir <- path.expand(destdir)
+
   # Platform detection
   platform <- Sys.info()[["sysname"]]
   machine <- Sys.info()[["machine"]]
@@ -149,7 +161,7 @@ install_onnx_runtime <- function(version = "1.29.0", quiet = FALSE, ...) {
       }
 
       # Determine library path
-      lib_dir <- file.path(.libPaths()[1], "churon", "onnxruntime", "lib")
+      lib_dir <- file.path(destdir, "lib")
 
       # Create directory if needed
       if (!dir.exists(lib_dir)) {
@@ -186,7 +198,7 @@ install_onnx_runtime <- function(version = "1.29.0", quiet = FALSE, ...) {
         )
         if (!copied) {
           stop(
-            "Failed to copy the ONNX Runtime library into the package library."
+            "Failed to copy the ONNX Runtime library into destdir."
           )
         }
 
@@ -206,35 +218,18 @@ install_onnx_runtime <- function(version = "1.29.0", quiet = FALSE, ...) {
         stop("Could not find ", lib_filename, " in extracted archive")
       }
 
-      # Copy include directory (for future use)
-      include_dir <- file.path(
-        .libPaths()[1],
-        "churon",
-        "onnxruntime",
-        "include"
-      )
-      if (!dir.exists(include_dir)) {
-        dir.create(include_dir, showWarnings = FALSE, recursive = TRUE)
-      }
-      include_src_dir <- file.path(extracted_dir, "include")
-      if (dir.exists(include_src_dir)) {
-        file.copy(
-          list.files(include_src_dir, full.names = TRUE, recursive = TRUE),
-          include_dir,
-          overwrite = TRUE,
-          recursive = TRUE
-        )
-      }
-
       # Clean up
       unlink(temp_dir, recursive = TRUE)
 
       # Verify installation
-      lib_file <- onnx_runtime_lib_path()
+      lib_file <- file.path(lib_dir, lib_filename)
       if (!file.exists(lib_file)) {
         stop("Installation verification failed: library file not found")
       }
 
+      Sys.setenv(ORT_DYLIB_PATH = normalizePath(lib_file))
+      setup_onnx_runtime()
+
       if (!quiet) {
         message(sprintf("ONNX Runtime installed successfully!"))
         message(sprintf("Library: %s", lib_file))
@@ -291,6 +286,10 @@ onnx_runtime_is_installed <- function() {
 #' @return Character string with the library path.
 #' @keywords internal
 onnx_runtime_lib_path <- function() {
+  configured_path <- Sys.getenv("ORT_DYLIB_PATH", unset = "")
+  if (nzchar(configured_path) && file.exists(configured_path)) {
+    return(configured_path)
+  }
   platform <- Sys.info()[["sysname"]]
   pkg_path <- system.file(package = "churon")
 
diff --git a/R/onnx_interface.R b/R/onnx_interface.R
index 7edfa3e..6ec2303 100644
--- a/R/onnx_interface.R
+++ b/R/onnx_interface.R
@@ -23,12 +23,12 @@ NULL
 #' @return An RSession object for running inference
 #' @export
 #' @examples
-#' \dontrun{
-#' # Create session with default providers
-#' session <- onnx_session("path/to/model.onnx")
+#' if (check_onnx_runtime_available()) {
+#'   # Create session with default providers
+#'   session <- onnx_example_session()
 #'
-#' # Create session with specific providers
-#' session <- onnx_session("path/to/model.onnx", providers = c("cuda", "cpu"))
+#'   # Create session with specific providers
+#'   session <- onnx_example_session(providers = "cpu")
 #' }
 onnx_session <- function(model_path, providers = NULL) {
   # Input validation
@@ -131,10 +131,10 @@ onnx_session <- function(model_path, providers = NULL) {
 #' @return A named list of output tensors
 #' @export
 #' @examples
-#' \dontrun{
-#' session <- onnx_session("path/to/model.onnx")
-#' inputs <- list(input_tensor = matrix(rnorm(10), nrow = 2, ncol = 5))
-#' outputs <- onnx_run(session, inputs)
+#' if (check_onnx_runtime_available()) {
+#'   session <- onnx_example_session()
+#'   inputs <- list(Input3 = array(0, dim = c(1, 1, 28, 28)))
+#'   outputs <- onnx_run(session, inputs)
 #' }
 onnx_run <- function(session, inputs) {
   .validate_session(session)
@@ -261,10 +261,10 @@ onnx_run <- function(session, inputs) {
 #' @return A list of TensorInfo objects containing input tensor metadata
 #' @export
 #' @examples
-#' \dontrun{
-#' session <- onnx_session("path/to/model.onnx")
-#' input_info <- onnx_input_info(session)
-#' print(input_info)
+#' if (check_onnx_runtime_available()) {
+#'   session <- onnx_example_session()
+#'   input_info <- onnx_input_info(session)
+#'   print(input_info)
 #' }
 onnx_input_info <- function(session) {
   .validate_session(session)
@@ -294,10 +294,10 @@ onnx_input_info <- function(session) {
 #' @return A list of TensorInfo objects containing output tensor metadata
 #' @export
 #' @examples
-#' \dontrun{
-#' session <- onnx_session("path/to/model.onnx")
-#' output_info <- onnx_output_info(session)
-#' print(output_info)
+#' if (check_onnx_runtime_available()) {
+#'   session <- onnx_example_session()
+#'   output_info <- onnx_output_info(session)
+#'   print(output_info)
 #' }
 onnx_output_info <- function(session) {
   .validate_session(session)
@@ -327,10 +327,10 @@ onnx_output_info <- function(session) {
 #' @return A character vector of available execution providers
 #' @export
 #' @examples
-#' \dontrun{
-#' session <- onnx_session("path/to/model.onnx")
-#' providers <- onnx_providers(session)
-#' cat("Available execution providers:", paste(providers, collapse = ", "), "\n")
+#' if (check_onnx_runtime_available()) {
+#'   session <- onnx_example_session()
+#'   providers <- onnx_providers(session)
+#'   cat("Available execution providers:", paste(providers, collapse = ", "), "\n")
 #' }
 onnx_providers <- function(session) {
   .validate_session(session)
@@ -360,10 +360,10 @@ onnx_providers <- function(session) {
 #' @return Character string with the model path
 #' @export
 #' @examples
-#' \dontrun{
-#' session <- onnx_session("path/to/model.onnx")
-#' model_path <- onnx_model_path(session)
-#' cat("Model path:", model_path, "\n")
+#' if (check_onnx_runtime_available()) {
+#'   session <- onnx_example_session()
+#'   model_path <- onnx_model_path(session)
+#'   cat("Model path:", model_path, "\n")
 #' }
 onnx_model_path <- function(session) {
   .validate_session(session)
diff --git a/R/s3_methods.R b/R/s3_methods.R
index c25540f..0370dcc 100644
--- a/R/s3_methods.R
+++ b/R/s3_methods.R
@@ -4,6 +4,10 @@
 #'
 #' @param x A TensorInfo or RSession object
 #' @param name Property name to access
+#' @return For `name` and `data_type`, a character scalar identifying the tensor
+#'   or its element type. For `shape`, an integer vector of tensor dimensions
+#'   (negative dimensions indicate dynamic sizes). For a method name, a function
+#'   bound to the object; for an unknown name, `NULL`.
 #' @export
 `$.TensorInfo` <- function(x, name) {
   if (name == "name") {
diff --git a/R/zzz.R b/R/zzz.R
index 90eaadd..5f1c07f 100644
--- a/R/zzz.R
+++ b/R/zzz.R
@@ -14,7 +14,9 @@
   if (!check_onnx_runtime_available()) {
     packageStartupMessage("")
     packageStartupMessage("ONNX Runtime is not installed.")
-    packageStartupMessage("To install, run: install_onnx_runtime()")
+    packageStartupMessage(
+      "To install, call install_onnx_runtime() with an explicit destdir."
+    )
     packageStartupMessage("")
   } else {
     packageStartupMessage("ONNX Runtime loaded successfully.")
diff --git a/cran-comments.md b/cran-comments.md
index b888d3d..be3e980 100644
--- a/cran-comments.md
+++ b/cran-comments.md
@@ -1,18 +1,37 @@
-## Test environments
+## Resubmission (0.1.12)
 
-* GitHub Actions: R-devel, R-release, and R 4.0 on Ubuntu (without ONNX
-  Runtime and without network access during package installation)
-* GitHub Actions: R-release on Ubuntu x86_64 and arm64, macOS, and Windows
-* r-universe: R-devel, R-release, and R-oldrel native builders, plus WebAssembly
+This resubmission addresses the CRAN review of version 0.1.11:
 
-## R CMD check results
+* Removed the redundant "for R" from the title and quoted software names
+  consistently; MNIST is no longer quoted.
+* Added ONNX Runtime and GitHub release URLs to DESCRIPTION.
+* Documented the return types and meaning of `$.TensorInfo` results.
+* Replaced non-running placeholder examples with executable examples using
+  the bundled MNIST model, conditional on runtime availability.
+* Removed software installation calls from the installer examples.
+* Required an explicit `destdir` for runtime installation. The installer no
+  longer writes into the package library, and configures `ORT_DYLIB_PATH`
+  for the current session. Later-session configuration is documented.
+* Removed automatic R package installation from the development setup script.
 
-0 errors | 0 warnings | 0 notes
+## Local validation (2026-09-11)
+
+* macOS arm64, R 4.5.2, Rust 1.97.1.
+* Runtime-enabled tests: 90 passed, no failures, warnings, or skips.
+* Offline `R CMD check --as-cran --no-manual`: 0 errors, 0 warnings, 1 note.
+  The note reports that current time could not be verified with network access
+  disabled. The official Debian `checkbashisms` utility was supplied for this check.
+  Package installation, documentation, examples, and tests passed.
 
 ## Additional notes
 
-This is a new submission.
+Rust dependencies are vendored in the source package for offline builds.
+ONNX Runtime is not bundled. The dedicated installer downloads it only on
+explicit request with a user-supplied destination. Tests requiring a runtime
+are skipped when it is absent; tests do not download or install software.
+
+## Submission status
 
-Rust dependencies are vendored in the source package for offline builds. ONNX
-Runtime is not bundled; users may download it explicitly with
-`install_onnx_runtime()`. Tests that require it are skipped when it is absent.
+Version 0.1.12 was uploaded and submitted through the CRAN web form on
+2026-09-11 (upload ID 354755). The maintainer subsequently confirmed publication on CRAN.
+The Git repository is being synchronized with the published 0.1.12 release.
diff --git a/man/cash-.TensorInfo.Rd b/man/cash-.TensorInfo.Rd
index dba9417..d404f8b 100644
--- a/man/cash-.TensorInfo.Rd
+++ b/man/cash-.TensorInfo.Rd
@@ -11,6 +11,12 @@
 
 \item{name}{Property name to access}
 }
+\value{
+For \code{name} and \code{data_type}, a character scalar identifying the tensor
+or its element type. For \code{shape}, an integer vector of tensor dimensions
+(negative dimensions indicate dynamic sizes). For a method name, a function
+bound to the object; for an unknown name, \code{NULL}.
+}
 \description{
 These methods provide convenient access to object properties.
 }
diff --git a/man/install_onnx_runtime.Rd b/man/install_onnx_runtime.Rd
index 9c8751e..a97565b 100644
--- a/man/install_onnx_runtime.Rd
+++ b/man/install_onnx_runtime.Rd
@@ -4,7 +4,7 @@
 \alias{install_onnx_runtime}
 \title{Install ONNX Runtime}
 \usage{
-install_onnx_runtime(version = "1.29.0", quiet = FALSE, ...)
+install_onnx_runtime(version = "1.29.0", quiet = FALSE, destdir, ...)
 }
 \arguments{
 \item{version}{Character string specifying the ONNX Runtime version to install.
@@ -13,6 +13,8 @@ Defaults to "1.29.0". Supported versions are "1.28.0" and "1.29.0";
 
 \item{quiet}{Logical. If TRUE, suppress download progress messages.}
 
+\item{destdir}{Required character string naming the installation directory.}
+
 \item{...}{Additional arguments passed to download.file()}
 }
 \value{
@@ -23,15 +25,10 @@ Download and install ONNX Runtime library for your platform.
 This is required before using the churon package if ONNX Runtime
 is not already installed on your system.
 }
-\examples{
-\dontrun{
-# Install ONNX Runtime
-install_onnx_runtime()
-
-# Install specific version
-install_onnx_runtime(version = "1.28.0")
-
-# Install with no output
-install_onnx_runtime(quiet = TRUE)
-}
+\details{
+This function installs external software only when explicitly called. Supply
+\code{destdir} yourself; no installation directory is selected by default.
+The library is placed in \code{destdir/lib} and configured for this R session.
+In later sessions, set \code{ORT_DYLIB_PATH} to the installed library file before
+loading churon. Restart R before switching an already loaded runtime.
 }
diff --git a/man/onnx_input_info.Rd b/man/onnx_input_info.Rd
index 098dc58..59242f1 100644
--- a/man/onnx_input_info.Rd
+++ b/man/onnx_input_info.Rd
@@ -16,9 +16,9 @@ A list of TensorInfo objects containing input tensor metadata
 Retrieve information about model input tensors.
 }
 \examples{
-\dontrun{
-session <- onnx_session("path/to/model.onnx")
-input_info <- onnx_input_info(session)
-print(input_info)
+if (check_onnx_runtime_available()) {
+  session <- onnx_example_session()
+  input_info <- onnx_input_info(session)
+  print(input_info)
 }
 }
diff --git a/man/onnx_model_path.Rd b/man/onnx_model_path.Rd
index 1ac8418..c19e626 100644
--- a/man/onnx_model_path.Rd
+++ b/man/onnx_model_path.Rd
@@ -16,9 +16,9 @@ Character string with the model path
 Get the model path from a session.
 }
 \examples{
-\dontrun{
-session <- onnx_session("path/to/model.onnx")
-model_path <- onnx_model_path(session)
-cat("Model path:", model_path, "\n")
+if (check_onnx_runtime_available()) {
+  session <- onnx_example_session()
+  model_path <- onnx_model_path(session)
+  cat("Model path:", model_path, "\n")
 }
 }
diff --git a/man/onnx_output_info.Rd b/man/onnx_output_info.Rd
index 14efd7f..34eee32 100644
--- a/man/onnx_output_info.Rd
+++ b/man/onnx_output_info.Rd
@@ -16,9 +16,9 @@ A list of TensorInfo objects containing output tensor metadata
 Retrieve information about model output tensors.
 }
 \examples{
-\dontrun{
-session <- onnx_session("path/to/model.onnx")
-output_info <- onnx_output_info(session)
-print(output_info)
+if (check_onnx_runtime_available()) {
+  session <- onnx_example_session()
+  output_info <- onnx_output_info(session)
+  print(output_info)
 }
 }
diff --git a/man/onnx_providers.Rd b/man/onnx_providers.Rd
index 70d634f..e7fa27b 100644
--- a/man/onnx_providers.Rd
+++ b/man/onnx_providers.Rd
@@ -16,9 +16,9 @@ A character vector of available execution providers
 Get the execution providers available for the session.
 }
 \examples{
-\dontrun{
-session <- onnx_session("path/to/model.onnx")
-providers <- onnx_providers(session)
-cat("Available execution providers:", paste(providers, collapse = ", "), "\n")
+if (check_onnx_runtime_available()) {
+  session <- onnx_example_session()
+  providers <- onnx_providers(session)
+  cat("Available execution providers:", paste(providers, collapse = ", "), "\n")
 }
 }
diff --git a/man/onnx_run.Rd b/man/onnx_run.Rd
index b7a9981..0bb067a 100644
--- a/man/onnx_run.Rd
+++ b/man/onnx_run.Rd
@@ -18,9 +18,9 @@ A named list of output tensors
 Execute inference on an ONNX model with input data.
 }
 \examples{
-\dontrun{
-session <- onnx_session("path/to/model.onnx")
-inputs <- list(input_tensor = matrix(rnorm(10), nrow = 2, ncol = 5))
-outputs <- onnx_run(session, inputs)
+if (check_onnx_runtime_available()) {
+  session <- onnx_example_session()
+  inputs <- list(Input3 = array(0, dim = c(1, 1, 28, 28)))
+  outputs <- onnx_run(session, inputs)
 }
 }
diff --git a/man/onnx_session.Rd b/man/onnx_session.Rd
index b772ca7..41cdb90 100644
--- a/man/onnx_session.Rd
+++ b/man/onnx_session.Rd
@@ -20,11 +20,11 @@ An RSession object for running inference
 Create a new ONNX Runtime session from a model file.
 }
 \examples{
-\dontrun{
-# Create session with default providers
-session <- onnx_session("path/to/model.onnx")
+if (check_onnx_runtime_available()) {
+  # Create session with default providers
+  session <- onnx_example_session()
 
-# Create session with specific providers
-session <- onnx_session("path/to/model.onnx", providers = c("cuda", "cpu"))
+  # Create session with specific providers
+  session <- onnx_example_session(providers = "cpu")
 }
 }
diff --git a/src/rust/src/lib.rs b/src/rust/src/lib.rs
index a4fa52f..5b8fafe 100644
--- a/src/rust/src/lib.rs
+++ b/src/rust/src/lib.rs
@@ -467,7 +467,7 @@ impl RSession {
                 path
             } else {
                 // Try to find the library in the package installation directory
-                // This is the default location used by install_onnx_runtime()
+                // Compatibility fallback for existing package-local installations
                 let pkg_path = std::env::var("R_PACKAGE_DIR")
                     .ok()
                     .or_else(|| std::env::var("R_LIBS_USER").ok())
@@ -485,7 +485,7 @@ impl RSession {
                 } else {
                     // Library not found - return error instead of panicking
                     return Err(extendr_api::Error::EvalError(
-                    "ONNX Runtime library not found. Please run install_onnx_runtime() to download it.".into(),
+                    "ONNX Runtime library not found. Please call install_onnx_runtime() with an explicit destdir to download it.".into(),
                 ));
                 }
             };
diff --git a/tests/testthat/test-end-to-end.R b/tests/testthat/test-end-to-end.R
index 4a191c2..c85fd0e 100644
--- a/tests/testthat/test-end-to-end.R
+++ b/tests/testthat/test-end-to-end.R
@@ -3,7 +3,9 @@ test_that("end-to-end workflow with example models", {
 
   # Check if ONNX Runtime is actually available
   if (!check_onnx_runtime_available()) {
-    skip("ONNX Runtime not installed - run install_onnx_runtime()")
+    skip(
+      "ONNX Runtime not installed - run install_onnx_runtime(destdir = tempdir())"
+    )
   }
 
   # Get available example models
@@ -43,7 +45,9 @@ test_that("convenience functions work correctly", {
 
   # Check if ONNX Runtime is available
   if (!check_onnx_runtime_available()) {
-    skip("ONNX Runtime not installed - run install_onnx_runtime()")
+    skip(
+      "ONNX Runtime not installed - run install_onnx_runtime(destdir = tempdir())"
+    )
   }
 
   models <- onnx_example_models()
@@ -67,7 +71,9 @@ test_that("error handling in real scenarios", {
 
   # Check if ONNX Runtime is available
   if (!check_onnx_runtime_available()) {
-    skip("ONNX Runtime not installed - run install_onnx_runtime()")
+    skip(
+      "ONNX Runtime not installed - run install_onnx_runtime(destdir = tempdir())"
+    )
   }
 
   # Test with non-existent model
@@ -104,7 +110,9 @@ test_that("input validation works correctly", {
 
   # Check if ONNX Runtime is available
   if (!check_onnx_runtime_available()) {
-    skip("ONNX Runtime not installed - run install_onnx_runtime()")
+    skip(
+      "ONNX Runtime not installed - run install_onnx_runtime(destdir = tempdir())"
+    )
   }
 
   models <- onnx_example_models()
diff --git a/tests/testthat/test-error-handling.R b/tests/testthat/test-error-handling.R
index 9a2ef24..374641e 100644
--- a/tests/testthat/test-error-handling.R
+++ b/tests/testthat/test-error-handling.R
@@ -30,7 +30,9 @@ test_that("error handling for invalid execution providers", {
 
   # Check if ONNX Runtime is available
   if (!check_onnx_runtime_available()) {
-    skip("ONNX Runtime not installed - run install_onnx_runtime()")
+    skip(
+      "ONNX Runtime not installed - run install_onnx_runtime(destdir = tempdir())"
+    )
   }
 
   model_dir <- system.file("model", package = "churon")
@@ -63,7 +65,9 @@ test_that("error handling for inference failures", {
 
   # Check if ONNX Runtime is available
   if (!check_onnx_runtime_available()) {
-    skip("ONNX Runtime not installed - run install_onnx_runtime()")
+    skip(
+      "ONNX Runtime not installed - run install_onnx_runtime(destdir = tempdir())"
+    )
   }
 
   model_dir <- system.file("model", package = "churon")
diff --git a/tests/testthat/test-inference-execution.R b/tests/testthat/test-inference-execution.R
index e5a1393..b52c830 100644
--- a/tests/testthat/test-inference-execution.R
+++ b/tests/testthat/test-inference-execution.R
@@ -3,7 +3,9 @@ test_that("basic inference execution", {
 
   # Check if ONNX Runtime is available
   if (!check_onnx_runtime_available()) {
-    skip("ONNX Runtime not installed - run install_onnx_runtime()")
+    skip(
+      "ONNX Runtime not installed - run install_onnx_runtime(destdir = tempdir())"
+    )
   }
 
   expect_true(TRUE)
@@ -14,7 +16,9 @@ test_that("inference with invalid input data", {
 
   # Check if ONNX Runtime is available
   if (!check_onnx_runtime_available()) {
-    skip("ONNX Runtime not installed - run install_onnx_runtime()")
+    skip(
+      "ONNX Runtime not installed - run install_onnx_runtime(destdir = tempdir())"
+    )
   }
 
   model_dir <- system.file("model", package = "churon")
diff --git a/tests/testthat/test-package-loading.R b/tests/testthat/test-package-loading.R
index 4326022..f7ce358 100644
--- a/tests/testthat/test-package-loading.R
+++ b/tests/testthat/test-package-loading.R
@@ -46,7 +46,7 @@ test_that("package metadata is correct", {
   desc <- packageDescription("churon")
 
   expect_equal(desc$Package, "churon")
-  expect_match(desc$Title, "'ONNX' Runtime")
+  expect_identical(desc$Title, "'ONNX Runtime' Integration")
   expect_match(desc$Description, "ONNX") # Check for ONNX mention
   expect_equal(desc$License, "MIT + file LICENSE")
 })
diff --git a/tests/testthat/test-runtime-configuration.R b/tests/testthat/test-runtime-configuration.R
index 0fdb23a..338f911 100644
--- a/tests/testthat/test-runtime-configuration.R
+++ b/tests/testthat/test-runtime-configuration.R
@@ -32,6 +32,8 @@ test_that("a valid configured ONNX Runtime path is preserved", {
   Sys.setenv(ORT_DYLIB_PATH = runtime)
   expect_true(churon:::setup_onnx_runtime())
   expect_equal(Sys.getenv("ORT_DYLIB_PATH"), normalizePath(runtime))
+  expect_identical(churon:::onnx_runtime_lib_path(), normalizePath(runtime))
+  expect_true(onnx_runtime_is_installed())
 })
 
 test_that("a missing configured ONNX Runtime path falls back gracefully", {
@@ -62,11 +64,11 @@ test_that("a missing configured ONNX Runtime path falls back gracefully", {
 
 test_that("runtime installer enforces verified compatible versions", {
   expect_error(
-    install_onnx_runtime(NA_character_, quiet = TRUE),
+    install_onnx_runtime(NA_character_, quiet = TRUE, destdir = tempdir()),
     "version must be one non-missing character string"
   )
   expect_error(
-    install_onnx_runtime("1.27.0", quiet = TRUE),
+    install_onnx_runtime("1.27.0", quiet = TRUE, destdir = tempdir()),
     "supports ONNX Runtime versions 1.28.0 and 1.29.0"
   )
   expect_identical(
@@ -77,3 +79,22 @@ test_that("runtime installer enforces verified compatible versions", {
     "c3fddc4f139a045b0c4902c57410f0694f1c2fdf9b6939fbe38b1aeae7cd14ba"
   )
 })
+
+
+test_that("runtime installation requires an explicit valid destination", {
+  expect_error(install_onnx_runtime(), "destdir must be supplied")
+  for (destdir in list(
+    NULL,
+    NA_character_,
+    "",
+    "  ",
+    character(),
+    c("a", "b"),
+    1
+  )) {
+    expect_error(
+      install_onnx_runtime(destdir = destdir),
+      "destdir must be supplied"
+    )
+  }
+})
diff --git a/tests/testthat/test-session-management.R b/tests/testthat/test-session-management.R
index 2c1422a..172a794 100644
--- a/tests/testthat/test-session-management.R
+++ b/tests/testthat/test-session-management.R
@@ -3,7 +3,9 @@ test_that("session creation with valid model", {
 
   # Check if ONNX Runtime is available
   if (!check_onnx_runtime_available()) {
-    skip("ONNX Runtime not installed - run install_onnx_runtime()")
+    skip(
+      "ONNX Runtime not installed - run install_onnx_runtime(destdir = tempdir())"
+    )
   }
 
   models <- onnx_example_models()
@@ -23,7 +25,9 @@ test_that("session creation with execution providers", {
 
   # Check if ONNX Runtime is available
   if (!check_onnx_runtime_available()) {
-    skip("ONNX Runtime not installed - run install_onnx_runtime()")
+    skip(
+      "ONNX Runtime not installed - run install_onnx_runtime(destdir = tempdir())"
+    )
   }
 
   models <- onnx_example_models()
@@ -46,7 +50,9 @@ test_that("session information retrieval", {
 
   # Check if ONNX Runtime is available
   if (!check_onnx_runtime_available()) {
-    skip("ONNX Runtime not installed - run install_onnx_runtime()")
+    skip(
+      "ONNX Runtime not installed - run install_onnx_runtime(destdir = tempdir())"
+    )
   }
 
   models <- onnx_example_models()
diff --git a/tools/setup-dev.R b/tools/setup-dev.R
index a9af5ec..9a2877f 100644
--- a/tools/setup-dev.R
+++ b/tools/setup-dev.R
@@ -1,31 +1,26 @@
 # Setup Development Environment
-# Run this script to install all dependencies required for development and testing
+# Run this script to check dependencies required for development and testing
 
 setup_dev_env <- function() {
-  # CRAN mirror
-  r_repo <- "https://cloud.r-project.org"
-
-  # Helper to install if missing
-  install_if_missing <- function(pkg) {
-    if (!requireNamespace(pkg, quietly = TRUE)) {
-      message(sprintf("Installing %s...", pkg))
-      install.packages(pkg, repos = r_repo)
-    }
+  packages <- c(
+    "devtools",
+    "testthat",
+    "roxygen2",
+    "rcmdcheck",
+    "rextendr",
+    "knitr",
+    "rmarkdown"
+  )
+  missing <- packages[
+    !vapply(packages, requireNamespace, logical(1), quietly = TRUE)
+  ]
+  if (length(missing)) {
+    stop(
+      "Install these development dependencies before continuing: ",
+      paste(missing, collapse = ", ")
+    )
   }
 
-  # Core dev tools
-  install_if_missing("devtools")
-  install_if_missing("testthat")
-  install_if_missing("roxygen2")
-  install_if_missing("rcmdcheck")
-
-  # Rust interop
-  install_if_missing("rextendr")
-
-  # Documentation
-  install_if_missing("knitr")
-  install_if_missing("rmarkdown")
-
   # Check for system dependencies
   message("Checking system requirements...")
 
@@ -50,7 +45,9 @@ setup_dev_env <- function() {
         churon:::onnx_runtime_lib_path()
       ))
     } else {
-      warning("ONNX Runtime not installed. Run churon::install_onnx_runtime()")
+      warning(
+        "ONNX Runtime not installed. Run churon::install_onnx_runtime(destdir = tempdir())"
+      )
     }
   }