added opencode serve command

packages/opencode/src/cli/cmd/serve.ts

@@ -0,0 +1,50 @@
+import { App } from "../../app/app"
+import { Provider } from "../../provider/provider"
+import { Server } from "../../server/server"
+import { Share } from "../../share/share"
+import { cmd } from "./cmd"
+
+export const ServeCommand = cmd({
+  command: "serve",
+  builder: (yargs) =>
+    yargs
+      .option("port", {
+        alias: ["p"],
+        type: "number",
+        describe: "port to listen on",
+        default: 4096,
+      })
+      .option("hostname", {
+        alias: ["h"],
+        type: "string",
+        describe: "hostname to listen on",
+        default: "127.0.0.1",
+      }),
+  describe: "starts a headless opencode server",
+  handler: async (args) => {
+    const cwd = process.cwd()
+    await App.provide({ cwd }, async () => {
+      const providers = await Provider.list()
+      if (Object.keys(providers).length === 0) {
+        return "needs_provider"
+      }
+
+      const hostname = args.hostname
+      const port = args.port
+
+      await Share.init()
+      const server = Server.listen({
+        port,
+        hostname,
+      })
+
+      console.log(
+        `opencode server listening on http://${server.hostname}:${server.port}`,
+      )
+
+      await new Promise(() => {})
+
+      server.stop()
+    })
+  },
+})