diff --git a/.codex b/.codex
new file mode 100644
index 0000000..e69de29
diff --git a/part1.sh b/part1.sh
index 8efa32e..ea2bb0a 100644
--- a/part1.sh
+++ b/part1.sh
@@ -20,6 +20,8 @@ command_exists() {
   command -v "$1" >/dev/null 2>&1
 }
 
+AUTO_INSTALL_DEPS=0
+
 find_ssh_key_in_dir() {
   local ssh_dir="$1"
   local key_file=""
@@ -46,7 +48,6 @@ wait_for_ssh_key() {
   local preferred_path="$1"
   local ssh_dir="$HOME_DIR/.ssh"
   local detected_key=""
-  local reply=""
 
   mkdir -p "$ssh_dir"
   chmod 700 "$ssh_dir"
@@ -64,22 +65,8 @@ wait_for_ssh_key() {
   info "Waiting for an SSH key to appear in $ssh_dir"
   printf 'Create the key in another terminal, then press Enter here to continue.\n'
   printf 'Expected path: %s (with matching .pub file)\n' "$preferred_path"
-
-  while true; do
-    read -r -p "Press Enter once you have generated the SSH key... " reply
-
-    if [[ -f "$preferred_path" && -f "$preferred_path.pub" ]]; then
-      printf '%s' "$preferred_path"
-      return 0
-    fi
-
-    if detected_key="$(find_ssh_key_in_dir "$ssh_dir")"; then
-      printf '%s' "$detected_key"
-      return 0
-    fi
-
-    warn "No key was found. Please press Enter when you have created the key."
-  done
+  read -r -p "Press Enter once you have generated the SSH key... "
+  printf '%s' "$preferred_path"
 }
 
 prompt_yes_no() {
@@ -107,6 +94,18 @@ prompt_yes_no() {
   done
 }
 
+prompt_dependency_yes_no() {
+  local prompt="$1"
+  local default="${2:-Y}"
+
+  if [[ "$AUTO_INSTALL_DEPS" -eq 1 ]]; then
+    printf '%s\n' "$prompt [auto-yes]"
+    return 0
+  fi
+
+  prompt_yes_no "$prompt" "$default"
+}
+
 prompt_value() {
   local prompt="$1"
   local default="${2:-}"
@@ -264,7 +263,11 @@ cd "$HOME_DIR"
 
 info "Interactive Arch post-install"
 
-if prompt_yes_no "Update the system first?" "Y"; then
+if prompt_yes_no "Auto-install dependency packages and tooling without per-item prompts?" "N"; then
+  AUTO_INSTALL_DEPS=1
+fi
+
+if prompt_dependency_yes_no "Update the system first?" "Y"; then
   info "Updating system"
   sudo pacman -Syu --noconfirm
 fi
@@ -307,21 +310,21 @@ declare -a PACMAN_PACKAGES=(
 
 info "Package selection"
 for package in "${PACMAN_PACKAGES[@]}"; do
-  if prompt_yes_no "Install package '$package'?" "Y"; then
+  if prompt_dependency_yes_no "Install package '$package'?" "Y"; then
     install_pacman_package "$package"
   fi
 done
 
-if prompt_yes_no "Install AUR helper 'yay'?" "Y"; then
+if prompt_dependency_yes_no "Install AUR helper 'yay'?" "Y"; then
   install_yay
 fi
 
-if command_exists yay && prompt_yes_no "Install AUR package 'zen-browser-bin'?" "Y"; then
+if command_exists yay && prompt_dependency_yes_no "Install AUR package 'zen-browser-bin'?" "Y"; then
   info "Installing zen-browser-bin"
   yay -S --needed --noconfirm zen-browser-bin
 fi
 
-if prompt_yes_no "Install ble.sh?" "Y"; then
+if prompt_dependency_yes_no "Install ble.sh?" "Y"; then
   if [[ ! -f "$HOME_DIR/.local/share/blesh/ble.sh" ]]; then
     info "Installing ble.sh"
     git clone --recursive --depth 1 --shallow-submodules https://github.com/akinomyoga/ble.sh.git "$TMP_DIR/ble.sh"
@@ -335,7 +338,7 @@ if prompt_yes_no "Install ble.sh?" "Y"; then
   append_if_missing '[ -f "$HOME/.config/blerc" ] && source "$HOME/.config/blerc"' "$HOME_DIR/.blerc"
 fi
 
-if prompt_yes_no "Enable starship in ~/.bashrc?" "Y"; then
+if prompt_dependency_yes_no "Enable starship in ~/.bashrc?" "Y"; then
   info "Configuring shell"
   append_if_missing 'eval "$(starship init bash)"' "$BASHRC"
 fi
@@ -354,8 +357,17 @@ if prompt_yes_no "Wait for an existing SSH key for git access?" "Y"; then
   ssh_key_path="$(prompt_required_value "SSH key path:" "$HOME_DIR/.ssh/id_ed25519")"
   ssh_key_path="$(wait_for_ssh_key "$ssh_key_path")"
 
-  chmod 600 "$ssh_key_path"
-  chmod 644 "$ssh_key_path.pub"
+  if [[ -f "$ssh_key_path" ]]; then
+    chmod 600 "$ssh_key_path"
+  else
+    warn "Private key '$ssh_key_path' was not found; continuing without changing permissions"
+  fi
+
+  if [[ -f "$ssh_key_path.pub" ]]; then
+    chmod 644 "$ssh_key_path.pub"
+  else
+    warn "Public key '$ssh_key_path.pub' was not found; clipboard copy will be skipped"
+  fi
 
   if prompt_yes_no "Add a git host to ~/.ssh/known_hosts?" "Y"; then
     git_host="$(prompt_required_value "Git host (for ssh-keyscan):")"
@@ -363,7 +375,9 @@ if prompt_yes_no "Wait for an existing SSH key for git access?" "Y"; then
   fi
 
   if prompt_yes_no "Copy the public SSH key to the clipboard?" "Y"; then
-    if command_exists wl-copy; then
+    if [[ ! -f "$ssh_key_path.pub" ]]; then
+      warn "Public key '$ssh_key_path.pub' is not available yet"
+    elif command_exists wl-copy; then
       wl-copy <"$ssh_key_path.pub"
       info "Your public SSH key has been copied to the clipboard"
     else
@@ -395,7 +409,7 @@ if prompt_yes_no "Remap ThinkPad Alt to Super with keyd?" "Y"; then
   fi
 fi
 
-if prompt_yes_no "Set up uv with Python 3.14 and global tools?" "Y"; then
+if prompt_dependency_yes_no "Set up uv with Python 3.14 and global tools?" "Y"; then
   if command_exists uv; then
     info "Configuring uv"
     uv python install 3.14