diff --git a/docs/INTEGRATION.md b/docs/INTEGRATION.md
index a79c405..9e3d239 100644
--- a/docs/INTEGRATION.md
+++ b/docs/INTEGRATION.md
@@ -66,6 +66,7 @@ The script:
 - writes via `openclaw config set ... --json`
 - creates config backup first
 - restores backup automatically if any install step fails
+- restarts gateway during install, then validates `whisper-gateway/no-reply` is visible via `openclaw models list/status`
 - writes a change record for every install/uninstall:
   - directory: `~/.openclaw/whispergate-install-records/`
   - latest pointer: `~/.openclaw/whispergate-install-record-latest.json`
diff --git a/scripts/install-whispergate-openclaw.mjs b/scripts/install-whispergate-openclaw.mjs
index 111ad8f..6e479b7 100755
--- a/scripts/install-whispergate-openclaw.mjs
+++ b/scripts/install-whispergate-openclaw.mjs
@@ -45,6 +45,19 @@ function runOpenclaw(args, { allowFail = false } = {}) {
   }
 }
 
+function validateNoReplyModelAvailable() {
+  const modelRef = `${NO_REPLY_PROVIDER_ID}/${NO_REPLY_MODEL_ID}`;
+  const list = runOpenclaw(["models", "list"], { allowFail: true }) || "";
+  if (!list.includes(modelRef)) {
+    throw new Error(`post-install validation failed: model not listed: ${modelRef}`);
+  }
+
+  const status = runOpenclaw(["models", "status", "--json"], { allowFail: true }) || "";
+  if (!status.includes(NO_REPLY_PROVIDER_ID)) {
+    throw new Error(`post-install validation failed: provider not visible in models status: ${NO_REPLY_PROVIDER_ID}`);
+  }
+}
+
 function getJson(pathKey) {
   const out = runOpenclaw(["config", "get", pathKey, "--json"], { allowFail: true });
   if (out == null || out === "") return { exists: false };
@@ -158,6 +171,9 @@ if (mode === "install") {
       ],
     });
 
+    runOpenclaw(["gateway", "restart"]);
+    validateNoReplyModelAvailable();
+
     const after = {
       [PATH_PLUGINS_LOAD]: getJson(PATH_PLUGINS_LOAD),
       [PATH_PLUGIN_ENTRY]: getJson(PATH_PLUGIN_ENTRY),