Put an agent to work listening on Reddit

Part 3 of a 5-part series on building agents from scratch in Claude Code, featuring a real brand example. We build an agent that monitors Reddit for brand mentions, competitor reviews, and market conversations across previously identified keywords. Output: social listening brief & Reddit thread database. Tech introduced: MCP servers. To follow along, use the repo at https://github.com/juliegrumman/soapbox-progro-starter