fix: expose noninteractive installer flag

scripts/install/install.ps1

@@ -1,5 +1,6 @@
 param(
-    [string]$Release = "latest"
+    [string]$Release = "latest",
+    [switch]$NonInteractive
 )
 
 Set-StrictMode -Version Latest
@@ -27,6 +28,10 @@ function Prompt-YesNo {
         [string]$Prompt
     )
 
+    if ($NonInteractive) {
+        return $false
+    }
+
     if ([Console]::IsInputRedirected -or [Console]::IsOutputRedirected) {
         return $false
     }

scripts/install/install.sh

@@ -3,6 +3,7 @@
 set -eu
 
 RELEASE="latest"
+NON_INTERACTIVE=false
 
 BIN_DIR="${CODEX_INSTALL_DIR:-$HOME/.local/bin}"
 BIN_PATH="$BIN_DIR/codex"
@@ -57,9 +58,12 @@ parse_args() {
         RELEASE="$2"
         shift
         ;;
+      --non-interactive)
+        NON_INTERACTIVE=true
+        ;;
       --help | -h)
         cat <<EOF
-Usage: install.sh [--release VERSION]
+Usage: install.sh [--release VERSION] [--non-interactive]
 EOF
         exit 0
         ;;
@@ -488,6 +492,10 @@ classify_existing_codex() {
 prompt_yes_no() {
   prompt="$1"
 
+  if [ "$NON_INTERACTIVE" = true ]; then
+    return 1
+  fi
+
   if ( : </dev/tty ) 2>/dev/null; then
     printf '%s [y/N] ' "$prompt" >/dev/tty
     if ! IFS= read -r answer </dev/tty; then