A recap of HackwithBay 3.0, a hackathon held at the AWS Builder Loft in San Francisco where Neo4j was a required tool. Three winning teams built graph-backed AI agent applications in under five hours: VeriGraph (a scientific paper evidence engine using Neo4j to store verifiable VALIDATES/REFUTES verdicts), Constructor (an autonomous semiconductor research assistant treating the graph as an append-only ledger), and The Ultra Super Social Passport (a party icebreaker using community detection and graph traversal to match guests). The post highlights how each team used Neo4j Aura meaningfully — as a typed, constrained source of truth for autonomous agents — and covers three different access patterns: the Bolt driver, the HTTP Query API v2, and RocketRide's built-in Neo4j pipeline component.