diff --git a/extensions/googlechat/package.json b/extensions/googlechat/package.json
index ed7ba487ce0..d76ddc648cd 100644
--- a/extensions/googlechat/package.json
+++ b/extensions/googlechat/package.json
@@ -10,6 +10,11 @@
   "peerDependencies": {
     "openclaw": ">=2026.3.2"
   },
+  "peerDependenciesMeta": {
+    "openclaw": {
+      "optional": true
+    }
+  },
   "openclaw": {
     "extensions": [
       "./index.ts"
diff --git a/extensions/memory-core/package.json b/extensions/memory-core/package.json
index 3669df92fb1..063921d9c0f 100644
--- a/extensions/memory-core/package.json
+++ b/extensions/memory-core/package.json
@@ -7,6 +7,11 @@
   "peerDependencies": {
     "openclaw": ">=2026.3.2"
   },
+  "peerDependenciesMeta": {
+    "openclaw": {
+      "optional": true
+    }
+  },
   "openclaw": {
     "extensions": [
       "./index.ts"
diff --git a/src/infra/install-package-dir.ts b/src/infra/install-package-dir.ts
index 8cf6388f6ca..5c5527000cf 100644
--- a/src/infra/install-package-dir.ts
+++ b/src/infra/install-package-dir.ts
@@ -126,7 +126,7 @@ export async function installPackageDir(params: {
     await sanitizeManifestForNpmInstall(params.targetDir);
     params.logger?.info?.(params.depsLogMessage);
     const npmRes = await runCommandWithTimeout(
-      ["npm", "install", "--omit=dev", "--silent", "--ignore-scripts"],
+      ["npm", "install", "--omit=dev", "--omit=peer", "--silent", "--ignore-scripts"],
       {
         timeoutMs: Math.max(params.timeoutMs, 300_000),
         cwd: params.targetDir,
diff --git a/src/test-utils/exec-assertions.ts b/src/test-utils/exec-assertions.ts
index 50bf54f61e4..def16cdfa05 100644
--- a/src/test-utils/exec-assertions.ts
+++ b/src/test-utils/exec-assertions.ts
@@ -11,7 +11,14 @@ export function expectSingleNpmInstallIgnoreScriptsCall(params: {
     throw new Error("expected npm install call");
   }
   const [argv, opts] = first;
-  expect(argv).toEqual(["npm", "install", "--omit=dev", "--silent", "--ignore-scripts"]);
+  expect(argv).toEqual([
+    "npm",
+    "install",
+    "--omit=dev",
+    "--omit=peer",
+    "--silent",
+    "--ignore-scripts",
+  ]);
   expect(opts?.cwd).toBe(params.expectedCwd);
 }