rclaude: add --version (git sha + date + repo path; -dirty if uncommitted)

bin/rclaude

@@ -164,9 +164,26 @@ cmd_resume() {
 # Dispatch
 # ---------------------------------------------------------------------------
 
+cmd_version() {
+    # Resolve symlink → real script → repo root.
+    _self=$0
+    while [ -L "$_self" ]; do _self=$(readlink "$_self"); done
+    _repo=$(cd "$(dirname "$_self")/.." 2>/dev/null && pwd)
+    if [ -d "$_repo/.git" ] && command -v git >/dev/null 2>&1; then
+        _sha=$(git -C "$_repo" rev-parse --short HEAD 2>/dev/null)
+        _dirty=""
+        [ -n "$(git -C "$_repo" status --porcelain 2>/dev/null)" ] && _dirty="-dirty"
+        _date=$(git -C "$_repo" log -1 --format=%cd --date=short HEAD 2>/dev/null)
+        printf 'rclaude (session-tools) %s%s  %s  %s\n' "$_sha" "$_dirty" "$_date" "$_repo"
+    else
+        printf 'rclaude (session-tools)  %s\n' "$_repo"
+    fi
+}
+
 case ${1:-} in
-    list)   shift; cmd_list   "$@"; exit ;;
-    resume) shift; cmd_resume "$@"; exit ;;
+    list)            shift; cmd_list    "$@"; exit ;;
+    resume)          shift; cmd_resume  "$@"; exit ;;
+    -v|--version)    cmd_version; exit ;;
 esac
 
 # ---------------------------------------------------------------------------