add more codex logic

agents/index.ts

@@ -0,0 +1,9 @@
+import type { AgentName } from "../main.ts";
+import { claude } from "./claude.ts";
+import { codex } from "./codex.ts";
+import type { Agent } from "./shared.ts";
+
+export const agents = {
+  claude,
+  codex,
+} as const satisfies Record<AgentName, Agent>;