feat(vscodex): add remote Codex collaboration module

aether-vscodex/vscode-extension/src/cli.ts

@@ -0,0 +1,30 @@
+import { CodexAgentAdapter } from "./codexAgentAdapter";
+import { RelayHost } from "./relayHost";
+import { StdioRelayTransport } from "./relayClient";
+
+/** Standalone bridge: relay frames in stdin, relay frames out on stdout. */
+async function main(): Promise<void> {
+  const logger = {
+    debug: (message: string, ...args: unknown[]) => console.error(`[debug] ${message}`, ...args),
+    info: (message: string, ...args: unknown[]) => console.error(`[info] ${message}`, ...args),
+    warn: (message: string, ...args: unknown[]) => console.error(`[warn] ${message}`, ...args),
+    error: (message: string, ...args: unknown[]) => console.error(`[error] ${message}`, ...args),
+  };
+  const command = process.env.CODEX_COMMAND || "codex";
+  const args = process.env.CODEX_APP_SERVER_ARGS ? JSON.parse(process.env.CODEX_APP_SERVER_ARGS) as string[] : ["app-server", "--stdio"];
+  const adapter = new CodexAgentAdapter({ command, args, defaultCwd: process.env.CODEX_WORKSPACE, logger });
+  const relay = new StdioRelayTransport(process.stdin, process.stdout, logger);
+  const host = new RelayHost({ adapter, relay, sendHandshake: true, logger });
+  const shutdown = async (): Promise<void> => {
+    await host.stop();
+    process.exit(0);
+  };
+  process.once("SIGINT", () => void shutdown());
+  process.once("SIGTERM", () => void shutdown());
+  await host.start();
+}
+
+void main().catch((error) => {
+  console.error(error instanceof Error ? error.stack ?? error.message : String(error));
+  process.exitCode = 1;
+});