Move things to external.ts

external.ts

@@ -1,6 +1,38 @@
-import type { AgentName } from "./main.ts";
+/**
+ * ⚠️ NO IMPORTS except modes.ts - this file is imported by Next.js and must avoid pulling in backend code.
+ * All shared constants, types, and data used by both the Next.js app and the action runtime live here.
+ * Other files in action/ re-export from this file for backward compatibility.
+ */
+
 import type { Mode } from "./modes.ts";
 
+// mcp name constant
+export const ghPullfrogMcpName = "gh-pullfrog";
+
+// agent manifest - static metadata about available agents
+export const agentsManifest = {
+  claude: {
+    name: "claude",
+    apiKeys: ["anthropic_api_key"],
+  },
+  codex: {
+    name: "codex",
+    apiKeys: ["openai_api_key"],
+  },
+  cursor: {
+    name: "cursor",
+    apiKeys: ["cursor_api_key"],
+  },
+  gemini: {
+    name: "gemini",
+    apiKeys: ["google_api_key", "gemini_api_key"],
+  },
+} as const;
+
+// agent name type - union of agent slugs
+export type AgentName = keyof typeof agentsManifest;
+
+// payload type for agent execution
 export type Payload = {
   "~pullfrog": true;