feat: add ultra mode

frontend/src/core/subagents/context.ts

@@ -0,0 +1,13 @@
+import { createContext, useContext } from "react";
+
+import type { SubagentState } from "../threads/types";
+
+export const SubagentContext = createContext<Map<string, SubagentState>>(new Map());
+
+export function useSubagentContext() {
+  const context = useContext(SubagentContext);
+  if (context === undefined) {
+    throw new Error("useSubagentContext must be used within a SubagentContext.Provider");
+  }
+  return context;
+}