OpenRouter tutorial: build a persistent AI agent that monitors Hacker News with the Agent SDK

OpenRouter 教程：用 Agent SDK 搭建常驻 AI Agent 监控 Hacker News

An OpenRouter tutorial uses TypeScript and @openrouter/agent 0.11.0 to build an agent that checks Hacker News on a schedule and writes summaries. File-based memory stops it from re-reporting the same items after a restart.

Why it matters: It combines scheduled checks, persistent memory, cost limits and human approval into one always-on agent, a structure you can move to repo or status-page monitoring.