Hacker News feed of items. Pass kind = top (default) | new | best | ask | show | job to pick the feed. Returns each item's id, type, author, time (unix + ISO), title, URL, text (for self-posts), score, descendant + kid counts, parent (for comments), dead/deleted flags, and canonical news.ycombinator.com URL. Default limit = 30, max 100. Useful for tech-sentiment + topic tracking.