import type { BrowserBackend } from "@/features/agent/tools/types"; type BrowserContextPromptInput = {  enabled: boolean;  backend: BrowserBackend;  url: string;  vision: boolean;}; export function browserContextPrompt({  enabled,  backend,  url,  vision,}: BrowserContextPromptInput): string {  if (!enabled) return "";  const activeUrl = url && url !== "about:blank" ? url : "about:blank";  return [    "<browser_context>",    "A server-side browser is available this turn via the browser_* tools; navigation and reads run on the host, and the user may optionally watch it in the Browser panel.",    `Backend: ${backend}.`,    `Active URL: ${activeUrl}.`,    "The page body has not been preloaded into this prompt. To inspect it, call browser_get_text or browser_get_html first.",    vision      ? "Screenshots are available on demand with browser_screenshot when visual layout matters."      : "This model may not be vision-capable; prefer browser_get_text/browser_get_html over browser_screenshot.",    "Use browser_navigate only for intentional navigation.",    // Counter the narrate-and-stop failure mode: when the browser is open, models    // tend to emit a one-line plan ("Let me check X, then rebuild Y") with NO    // tool call and stop — the agent loop ends the turn and nothing happens until    // the user nudges "go on". Tell the model to ACT in the same turn instead.    "When you state a plan, carry it out in the SAME turn by calling the tools you described — do not end your turn after only saying what you will do. Keep going until the task is complete, narrating briefly as you act.",    "</browser_context>",  ].join("\n");}