Forward --remote to setup agent in cli.new installer

install.sh

@@ -26,6 +26,10 @@ help_text="Options
    --agents
    Install or reuse the Railway CLI, then configure Railway agent support
 
+   --remote
+   When used with --agents, configure the remote HTTP MCP server at
+   mcp.railway.com instead of the local stdio server
+
    -r, --remove
    Uninstall railway
 
@@ -393,6 +397,7 @@ is_build_available() {
 UNINSTALL=0
 HELP=0
 AGENTS=0
+REMOTE=0
 RAILWAY_HOME_DIR=""
 RAILWAY_ENV_FILE=""
 RAILWAY_FISH_ENV_FILE=""
@@ -477,6 +482,10 @@ while [ "$#" -gt 0 ]; do
     AGENTS=1
     shift 1
     ;;
+  --remote)
+    REMOTE=1
+    shift 1
+    ;;
   -h | --help)
     HELP=1
     shift 1
@@ -520,6 +529,12 @@ else
   VERBOSE=
 fi
 
+# --remote only takes effect alongside --agents (it routes setup agent to the
+# hosted MCP server). Warn loudly rather than silently no-op.
+if [ "$REMOTE" = 1 ] && [ "$AGENTS" != 1 ]; then
+  warn "--remote has no effect without --agents. Re-run with both flags to configure remote MCP."
+fi
+
 write_env_files() {
   local quoted_railway_home
   local fish_railway_home
@@ -887,6 +902,7 @@ warn_existing_path_conflict() {
 run_agent_setup() {
   local railway_bin="$1"
   local yes=""
+  local remote=""
 
   if [ -z "${RAILWAY_INSTALL_REQUEST_ID-}" ]; then
     RAILWAY_INSTALL_REQUEST_ID="install_$(od -vAn -N16 -tx1 < /dev/urandom | tr -d ' \n')"
@@ -897,6 +913,10 @@ run_agent_setup() {
     yes="-y"
   fi
 
+  if [ "$REMOTE" = 1 ]; then
+    remote="--remote"
+  fi
+
   if [ -t 0 ] && [ -z "${FORCE-}" ]; then
     if "$railway_bin" whoami >/dev/null 2>&1; then
       info "Already logged in to Railway."
@@ -906,7 +926,7 @@ run_agent_setup() {
     fi
   fi
 
-  "$railway_bin" setup agent $yes
+  "$railway_bin" setup agent $yes $remote
 
   if ! "$railway_bin" whoami >/dev/null 2>&1; then
     warn "Next: run '$railway_bin login' to finish setup (opens a browser)."
@@ -993,6 +1013,15 @@ if [ "$AGENTS" = 1 ] && has railway; then
   esac
 
   if [ "$BREW_INSTALL" = 1 ]; then
+    if [ "$REMOTE" = 1 ]; then
+      # --remote was added in a newer release. Continuing with an older brewed
+      # CLI would call `setup agent --remote` and fail with an unrecognized-arg
+      # error after we already told the user we were continuing. Refuse early.
+      error "Railway CLI was installed via Homebrew (version $CURRENT_VERSION)."
+      error "The --remote flag requires Railway CLI $RAILWAY_VERSION or newer."
+      error "Run 'brew upgrade railway' first, then re-run cli.new --agents --remote."
+      exit 1
+    fi
     warn "Railway CLI was installed via Homebrew."
     warn "Run 'brew upgrade railway' to update from $CURRENT_VERSION to $RAILWAY_VERSION, then re-run cli.new --agents."
     info "Continuing with $CURRENT_VERSION."