fix(abiba): backport EADDRINUSE handler + private message to format to TS source

pi-zulip-extension/package-lock.json

@@ -2668,6 +2668,7 @@
       "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.9.3.tgz",
       "integrity": "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==",
       "dev": true,
+      "license": "Apache-2.0",
       "bin": {
         "tsc": "bin/tsc",
         "tsserver": "bin/tsserver"

pi-zulip-extension/src/index.ts

@@ -14,6 +14,7 @@
 import type { ExtensionAPI, ExtensionContext } from "@mariozechner/pi-coding-agent";
 import { createClient } from "zulip-js";
 import { spawnSync } from "node:child_process";
+
 import http from "node:http";
 import fs from "node:fs";
 import path from "node:path";
@@ -201,7 +202,8 @@ async function createZulipQueue(config: ZulipConfig) {
     }): Promise<void> {
       const formBody = new URLSearchParams();
       formBody.append("type", params.type);
-      formBody.append("to", String(params.to));
+      // Zulip API: private messages need JSON array of user IDs, stream messages accept string/number
+      formBody.append("to", params.type === "private" ? JSON.stringify([params.to]) : String(params.to));
       if (params.subject) formBody.append("subject", params.subject);
       formBody.append("content", params.content);
 
@@ -259,6 +261,14 @@ function startHealthServer(port: number, getState: () => Record<string, unknown>
     }
   });
 
+  server.on("error", (err: any) => {
+    if (err.code === "EADDRINUSE") {
+      console.warn(`[zulip-ext] Port :${port} already in use — skipping health endpoint`);
+    } else {
+      console.error(`[zulip-ext] Health server error:`, err.message);
+    }
+  });
+
   server.listen(port, "127.0.0.1", () => {
     console.log(`[zulip-ext] Health endpoint on :${port}`);
   });
@@ -597,7 +607,7 @@ export default async function (pi: ExtensionAPI) {
   // Usage: /zulip-send-test "targetEmail" "message body"
   pi.registerCommand("zulip-send-test", {
     description: "Send a test message to Zulip user: /zulip-send-test <email> <message>",
-    handler: async (args: string, ctx: ExtensionCommandContext) => {
+    handler: async (args: string, ctx: ExtensionContext) => {
       const parts = args.trim().match(/^([^\s]+)\s+(.+)$/);
       const targetEmail = parts?.[1] ?? config.agent.owner_email;
       const message = parts?.[2] ?? "Test message from pi Zulip extension";