The $130/Month AI Agent Stack That Replaced a $200k Marketing Team

I spent 6 months building an agentic content pipeline that handles research → ideation → draft → QA → publish. Here's the exact architecture and cost breakdown. Research Agent ($8/mo) - Monitors 50+ RSS feeds, 10 competitor blogs - Runs nightly Brave Search queries on trending topics - Scores opportunities by search volume growth + competition gap + expertise alignment - Output: 5-7 viable angles with citations 2.