diff --git a/cmd/kvlang/run.go b/cmd/kvlang/run.go
index cb81de89..799de799 100644
--- a/cmd/kvlang/run.go
+++ b/cmd/kvlang/run.go
@@ -5,7 +5,6 @@ import (
 	"flag"
 	"fmt"
 	"os"
-	"path/filepath"
 	"strings"
 	"time"
 
@@ -72,7 +71,7 @@ func executeEntry(kv kvspace.KVSpace, entryName string, debug bool) {
 	vtid := vthread.AllocVtid(kv)
 	kv.DelTree(keytree.VThread(vtid))
 	kvspace.MkIndexRecursive(kv, keytree.VThread(vtid)+"/")
-	builtin.WriteRwir(kv, filepath.Base(os.Args[0]))
+	builtin.WriteRwir(kv)
 	if !noterm {
 		term.Register(kv)
 		go term.Serve(kv)
diff --git a/keytree/sys.go b/keytree/sys.go
index a5a67f62..31d77b74 100644
--- a/keytree/sys.go
+++ b/keytree/sys.go
@@ -4,8 +4,3 @@ package keytree
 const RwirRoot = LibRoot
 
 func Rwir(opcode string) string { return RwirRoot + PathSegSep + opcode }
-
-// RwirRuntime 返回 /lib/{runtime}/{opcode}。{runtime} 反射自可执行文件名。
-func RwirRuntime(runtime, opcode string) string {
-	return RwirRoot + PathSegSep + runtime + PathSegSep + opcode
-}
diff --git a/rwir/builtin/rwirs.go b/rwir/builtin/rwirs.go
index 37a8d8db..17ddb8fb 100644
--- a/rwir/builtin/rwirs.go
+++ b/rwir/builtin/rwirs.go
@@ -64,17 +64,14 @@ func countSigParams(sig string) (reads, writes int32) {
 	return
 }
 
-// WriteRwir 将所有已注册的 native rwir 签名写入 /rwir/{runtime}/。
-// rwir 是空函数体（无指令体，仅签名），只能落在 /rwir/{runtime}/，不进 /lib/。
-// {runtime} 反射自可执行文件名（如 kvlang），使多个 runtime 共存于同一 kvspace 不冲突。
-func WriteRwir(kv kvspace.KVSpace, runtime string) {
+// WriteRwir 将所有已注册的 native rwir 签名写入 /lib/<opcode>（kind=rwir，空函数体仅签名）。
+func WriteRwir(kv kvspace.KVSpace) {
 	pairs := make([]kvspace.KVPair, 0, len(rwirregistry))
 	for opcode, op := range rwirregistry {
-		if op.sig == "" { continue }
-		if strings.Contains(opcode, "/") { continue }
+		if op.sig == "" || strings.Contains(opcode, "/") { continue }
 		reads, writes := countSigParams(op.sig)
 		pairs = append(pairs, kvspace.KVPair{
-			Key: keytree.RwirRuntime(runtime, opcode),
+			Key: keytree.Rwir(opcode),
 			Val: kvspace.NewRwir(int32(reads), int32(writes), string(op.sig)),
 		})
 	}