Fetch - Universal URL Fetcher (Anti-Block Layer)

ZAO universal URL fetcher — picks the right tool per URL when WebFetch is blocked. Routes Reddit URLs to zao-fetch-reddit.sh (curl + Mozilla UA + .json), X/Twitter URLs to zao-fetch-x.sh (syndication endpoint + nitter + wayback fallback), HN to Algolia API, GitHub to gh CLI, others to WebFetch. Use when WebFetch returns a block message, when researching social-media content, or when the user shares a Reddit/X URL.