diff --git a/sh/self.sh b/sh/self.sh
index 08ca24f..9a937a8 100644
--- a/sh/self.sh
+++ b/sh/self.sh
@@ -1,3 +1,24 @@
+# meta doc
+rwx_doc() {
+	local name="${1}"
+	[ -n "${name}" ] || return
+	local doc line module
+	rwx_ifs_set
+	for module in $(rwx_find_shell "${RWX_ROOT_SYSTEM}"); do
+		while read -r line; do
+			case "${line}" in
+				"#"*) doc="${doc}${line}" ;;
+				"${name}() {")
+					echo "${doc}"
+					return
+					;;
+				*) doc="" ;;
+			esac
+		done < "${RWX_ROOT_SYSTEM}/${module}"
+	done
+	rwx_ifs_unset
+}
+
 # ╭──────┬───────╮
 # │ self │ check │
 # ╰──────┴───────╯