diff --git a/index.ts b/index.ts
index 0bba242..972db72 100644
--- a/index.ts
+++ b/index.ts
@@ -233,6 +233,20 @@ export default function piIntercomExtension(pi: ExtensionAPI) {
     const entry = { from, message, replyCommand, bodyText };
     void (async () => {
       if (!ctx.isIdle()) {
+        // Non-interactive (pipe) mode: cannot interrupt or start new turns.
+        // Best-effort auto-reply to incoming top-level messages (those without
+        // `replyTo`) so the sender isn't left hanging; reply messages are skipped.
+        if (!ctx.hasUI) {
+          if (client && !message.replyTo) {
+            try {
+              await client.send(from.id, {
+                text: "This agent is running in non-interactive (pipe) mode and cannot respond to messages while working. It will complete its current task and exit.",
+                replyTo: message.id,
+              });
+            } catch { /* best-effort */ }
+          }
+          return;
+        }
         const detached = await requestGracefulDetach();
         if (detached) {
           sendIncomingMessage(entry, "trigger");
diff --git a/package.json b/package.json
index 4f64f42..fc30d3a 100644
--- a/package.json
+++ b/package.json
@@ -4,6 +4,15 @@
   "license": "MIT",
   "type": "module",
   "main": "index.ts",
+  "keywords": ["pi-package"],
+  "pi": {
+    "extensions": ["./index.ts"]
+  },
+  "peerDependencies": {
+    "@mariozechner/pi-coding-agent": "*",
+    "@mariozechner/pi-tui": "*",
+    "@sinclair/typebox": "*"
+  },
   "dependencies": {
     "tsx": "^4.20.0"
   }