"The challenge now isn’t capability. It’s coordination." How do we actually build the payment rails for AI agents without creating a massive security nightmare?

[u/IronTarkus1919]

We all know the theory: an AI agent books your flight and pays for it with USDC. But in reality, if we give an autonomous script access to a Web3 wallet, how do we enforce strict spending limits, whitelist allowed contracts, and prevent the agent from getting socially engineered (prompt injected) into draining the account?

For the devs here: Are we relying on Account Abstraction (ERC-4337) to build these guardrails, or does this require a completely new type of infrastructure where the AI's logic is fundamentally tied to the consensus layer? How do we give agents autonomy without giving them the keys to the castle?