Building a Local-First Rehab Cost Analyzer with an AI Agent (Full Build + Replication Guide)

Why this post exists This is both a retrospective and a replication guide . Over a single working session, an AI agent (Hermes Agent, running locally on my Mac) took a vague idea — "estimate rehab cost from public property data, locally" — and produced a working, committed, pushed to GitHub application. No human wrote the code by hand; the agent did, and I (the human) steered, reviewed the…