feat: add imessage rpc adapter

src/imessage/probe.ts

@@ -0,0 +1,33 @@
+import { detectBinary } from "../commands/onboard-helpers.js";
+import { loadConfig } from "../config/config.js";
+import { createIMessageRpcClient } from "./client.js";
+
+export type IMessageProbe = {
+  ok: boolean;
+  error?: string | null;
+};
+
+export async function probeIMessage(
+  timeoutMs = 2000,
+): Promise<IMessageProbe> {
+  const cfg = loadConfig();
+  const cliPath = cfg.imessage?.cliPath?.trim() || "imsg";
+  const dbPath = cfg.imessage?.dbPath?.trim();
+  const detected = await detectBinary(cliPath);
+  if (!detected) {
+    return { ok: false, error: `imsg not found (${cliPath})` };
+  }
+
+  const client = await createIMessageRpcClient({
+    cliPath,
+    dbPath,
+  });
+  try {
+    await client.request("chats.list", { limit: 1 }, { timeoutMs });
+    return { ok: true };
+  } catch (err) {
+    return { ok: false, error: String(err) };
+  } finally {
+    await client.stop();
+  }
+}