diff --git a/bin/rbtop b/bin/rbtop
index 7186ada..0e6d6a7 100755
--- a/bin/rbtop
+++ b/bin/rbtop
@@ -1,3 +1,35 @@
-#!/bin/bash
-# rbtop - Connect to apricot and run btop (transient install)
-ssh -t apricot.lan "sudo dnf install -y --transient btop && btop"
+#!/bin/sh
+# rbtop — connect to apricot and run btop (transient dnf install on first run).
+#
+# Prefers mosh over ssh when both ends have it (better resilience for the
+# interactive TUI under sleep/roam/network blips). Override with
+# RBTOP_TRANSPORT=ssh to force ssh.
+
+set -eu
+
+HOST=${RBTOP_HOST:-apricot.lan}
+INNER='sudo dnf install -y --transient btop && btop'
+
+# Reuse rclaude's auto-installer for shared deps (mosh, etc.). Idempotent —
+# the marker in ~/.cache/rclaude/ skips re-running on every invocation.
+if command -v rclaude >/dev/null 2>&1; then
+    rclaude install --on "$HOST" >&2 || true
+fi
+
+case ${RBTOP_TRANSPORT:-auto} in
+    ssh)  use=ssh ;;
+    mosh) use=mosh ;;
+    *)
+        use=ssh
+        if command -v mosh >/dev/null 2>&1 \
+           && ssh -o BatchMode=yes -o ConnectTimeout=3 "$HOST" 'command -v mosh-server' >/dev/null 2>&1; then
+            use=mosh
+        fi
+        ;;
+esac
+
+if [ "$use" = mosh ]; then
+    exec mosh "$HOST" -- sh -c "$INNER"
+else
+    exec ssh -t -o ServerAliveInterval=30 -o ServerAliveCountMax=6 "$HOST" "$INNER"
+fi
diff --git a/bin/rclaude b/bin/rclaude
index d9cdfa4..17e315d 100755
--- a/bin/rclaude
+++ b/bin/rclaude
@@ -350,14 +350,25 @@ detect_os_on() {
 }
 
 # Install <pkgs> on <host> using its native package manager. Uses sudo for
-# system pkgs on Linux; brew (no sudo) on macOS.
+# system pkgs on Linux; brew (no sudo) on macOS. On bootc/Silverblue-style
+# immutable systems (signaled by /run/ostree-booted), dnf is given
+# `--transient` so the install lands in an overlay that survives until
+# reboot — rclaude's per-host marker is invalidated below on reboot so it
+# re-installs automatically.
 install_pkgs_on() {
     _h=$1; _os=$2; shift 2
     _pkgs=$*
     [ -z "$_pkgs" ] && return 0
+    _dnf_flags="-y"
+    if [ "$_os" = "rhel" ]; then
+        if _probe_on "$_h" 'test -e /run/ostree-booted && echo bootc; :' | grep -q bootc; then
+            _dnf_flags="-y --transient"
+            printf 'rclaude: %s is bootc/immutable — using --transient overlay\n' "$_h" >&2
+        fi
+    fi
     case $_os in
         macos)  _cmd="brew install $_pkgs" ;;
-        rhel)   _cmd="sudo dnf install -y $_pkgs" ;;
+        rhel)   _cmd="sudo dnf install $_dnf_flags $_pkgs" ;;
         debian) _cmd="sudo apt-get update && sudo apt-get install -y $_pkgs" ;;
         *)
             echo "rclaude: don't know how to install $_pkgs on $_h ($_os) — do it manually" >&2
@@ -397,17 +408,21 @@ setup_host() {
         echo "rclaude: couldn't detect OS on $_h; skipping setup" >&2
         return 0
     fi
-    # Probe system binaries.
+    # Probe system binaries. The trailing `; :` guarantees a 0 exit from the
+    # remote shell so `set -e` in our caller doesn't kill us when a missing
+    # binary's `command -v` returns 1 inside the loop. Newline-delim output;
+    # the awk comparison below ignores delimiter shape.
     _missing=""
-    _have=$(_probe_on "$_h" 'for c in tmux rsync mosh; do command -v "$c" >/dev/null 2>&1 && echo "$c"; done')
+    _have=$(_probe_on "$_h" 'for c in tmux rsync mosh; do command -v "$c" >/dev/null 2>&1 && echo "$c"; done; :')
     for c in tmux rsync mosh; do
-        case " $_have " in *" $c "*) ;; *) _missing="$_missing $c" ;; esac
+        printf '%s\n' "$_have" | grep -Fxq "$c" || _missing="$_missing $c"
     done
     if [ -n "$_missing" ]; then
         install_pkgs_on "$_h" "$_os" $_missing || true
     fi
-    # Python SDK for triage. Try to install per-user without sudo.
-    _has_sdk=$(_probe_on "$_h" 'for p in python3.13 python3.12 python3.11 python3; do b=$(command -v "$p" 2>/dev/null) || continue; "$b" -c "import claude_code_batch_sdk" 2>/dev/null && echo "$b" && break; done')
+    # Python SDK for triage. Try to install per-user without sudo. Same `; :`
+    # guard for the same reason.
+    _has_sdk=$(_probe_on "$_h" 'for p in python3.13 python3.12 python3.11 python3; do b=$(command -v "$p" 2>/dev/null) || continue; "$b" -c "import claude_code_batch_sdk" 2>/dev/null && echo "$b" && break; done; :')
     if [ -z "$_has_sdk" ]; then
         _pick=$(_probe_on "$_h" 'for p in python3.12 python3.11 python3; do command -v "$p" 2>/dev/null && break; done | head -1')
         if [ -n "$_pick" ]; then
@@ -911,7 +926,7 @@ case ${1:-} in
     list)             shift; cmd_list    "$@"; exit ;;
     resume)           shift; cmd_resume  "$@"; exit ;;
     triage)           shift; cmd_triage  "$@"; exit ;;
-    setup)            shift; cmd_setup   "$@"; exit ;;
+    setup|install)    shift; cmd_setup   "$@"; exit ;;
     -v|--version)     cmd_version; exit ;;
     -h|--help|help)   cmd_help; exit ;;
 esac