diff --git a/bin/rclaude b/bin/rclaude
index b70ab11..6222c6e 100755
--- a/bin/rclaude
+++ b/bin/rclaude
@@ -659,7 +659,12 @@ cmd_resume() {
                     exit 1 ;;
             esac
             migrate_session "$_host" "$_dst" "$_target" "$_session_cwd" "$_dst_cwd" || exit
-            RCLAUDE_RESUME_ID=$_target exec "$0" "$_dst" "$_dst_cwd"
+            # Pass src + src_cwd to the launch path so it can rsync the project
+            # tree if the dst dir doesn't exist (set RCLAUDE_MIGRATE_SYNC=none
+            # to skip and just mkdir).
+            RCLAUDE_MIGRATE_FROM=$_host RCLAUDE_MIGRATE_FROM_CWD=$_session_cwd \
+                RCLAUDE_RESUME_ID=$_target \
+                exec "$0" "$_dst" "$_dst_cwd"
             ;;
     esac
 }
@@ -778,15 +783,53 @@ fi
 # Remote: pre-flight the directory so a typo or missing path fails loudly
 # here instead of silently killing the tmux pane and closing the ssh
 # transport (which looks like a generic 'Connection closed' to the user).
+#
+# Cross-host mirror exception: when invoked via `resume --on`, we've just
+# migrated the session JSONL but the project files may not exist on the
+# target. In that case auto-mkdir so the conversation can be resumed; the
+# user can sync project files separately (rsync / git clone). The session
+# state is what matters most for resume.
 if ! ssh -o BatchMode=yes -o ConnectTimeout=5 "$host" "test -d ${dir}" 2>/dev/null; then
-    echo "rclaude: directory not found on $host: $dir" >&2
-    case $dir in
-        *@proj/*|*@apps/*|*@pkg/*)
-            echo "  hint: '@proj/@apps/@pkg' are Claude-instruction aliases, not real shell paths." >&2
-            echo "  See ~/.claude/instructions/project-paths.md for the real ~/Code/<bucket>/<project> mapping." >&2
-            ;;
-    esac
-    exit 1
+    if [ -n "${RCLAUDE_RESUME_ID:-}" ] && [ -n "${RCLAUDE_MIGRATE_FROM:-}" ]; then
+        # Cross-host mirror landing: try to rsync the project tree from
+        # source to dst so claude has the files it expects. Falls back to
+        # mkdir-only when sync is disabled or rsync fails. Both endpoints
+        # being remote is unsupported (no two-hop relay).
+        _sync_mode=${RCLAUDE_MIGRATE_SYNC:-rsync}
+        _src_host=$RCLAUDE_MIGRATE_FROM
+        _src_dir=$RCLAUDE_MIGRATE_FROM_CWD
+        _did_rsync=0
+        if [ "$_sync_mode" = "rsync" ] && command -v rsync >/dev/null 2>&1; then
+            _src_local=0; _dst_local=0
+            is_local "$_src_host" && _src_local=1
+            is_local "$host"      && _dst_local=1
+            if [ $((_src_local + _dst_local)) -ge 1 ]; then
+                _src_arg=$([ "$_src_local" = 1 ] && printf '%s/' "$_src_dir" || printf '%s:%s/' "$_src_host" "$_src_dir")
+                _dst_arg=$([ "$_dst_local" = 1 ] && printf '%s/' "$dir"      || printf '%s:%s/' "$host"      "$dir")
+                printf 'rclaude: rsyncing %s → %s ...\n' "$_src_arg" "$_dst_arg" >&2
+                if rsync -a --info=stats1 "$_src_arg" "$_dst_arg" >&2; then
+                    _did_rsync=1
+                else
+                    echo "rclaude: rsync failed; falling back to empty mkdir" >&2
+                fi
+            fi
+        fi
+        if [ "$_did_rsync" = 0 ]; then
+            echo "rclaude: $dir doesn't exist on $host — creating empty dir for session resume." >&2
+            echo "  (sync separately if needed: rsync -a $_src_dir/ $host:$dir/)" >&2
+            ssh -o BatchMode=yes -o ConnectTimeout=5 "$host" "mkdir -p ${dir}" 2>/dev/null || {
+                echo "rclaude: mkdir failed on $host: $dir" >&2; exit 1; }
+        fi
+    else
+        echo "rclaude: directory not found on $host: $dir" >&2
+        case $dir in
+            *@proj/*|*@apps/*|*@pkg/*)
+                echo "  hint: '@proj/@apps/@pkg' are Claude-instruction aliases, not real shell paths." >&2
+                echo "  See ~/.claude/instructions/project-paths.md for the real ~/Code/<bucket>/<project> mapping." >&2
+                ;;
+        esac
+        exit 1
+    fi
 fi
 
 sync_tmux_conf "$host"