Hacker News now routes visitors through Anubis, a proof‑of‑work gatekeeper designed to deter aggressive AI scraping. When a browser requests a page, the system challenges it with a lightweight computational puzzle, echoing the classic Hashcash model that once curbed email spam. Legitimate users typically notice no delay, while mass scrapers face a costly bottleneck.

The current deployment runs version 1.21.3, requiring modern JavaScript features. Users employing privacy extensions like JShelter may encounter a block because those tools disable the necessary APIs. Site operators advise disabling such extensions for the domain to ensure smooth access while the PoW filter does its work.

Beyond the immediate hurdle, Anubis buys developers time to refine fingerprinting techniques—examining font rendering quirks and other headless‑browser signals. By raising the price of indiscriminate crawling, the service aims to protect content without resorting to heavyweight authentication, keeping the community‑driven site responsive for genuine readers.