from __future__ import annotations

import asyncio
from typing import Dict, Iterable


async def prefetch_many(links: Iterable[str]) -> Dict[str, str]:
    """Prefetch resources referenced in the plan.

    This minimal implementation simply simulates network latency and returns a
    dictionary indicating the URLs were observed. Real deployments should replace
    this with an HTTP client that caches responses or streams artifacts into the
    runtime environment.
    """

    results: Dict[str, str] = {}
    for url in links:
        # Simulate asynchronous prefetch without external dependencies.
        await asyncio.sleep(0)
        results[url] = "prefetched"
    return results
