Gatekeeper the trust layer for production web agents Gemini 3.5 Flash · Gemma · Playwright · Lambda H100 ★ GitHub

Trust your agent to act unattended.

You built an agent that clicks "issue refund" in your real app. Here's what lets you turn it on.

Live agent · real DOM

Verify the customer & check the refund policy
Click Issue refund
Confirm — the refund actually posts

Success = the refund posted to the live DOM, never the dialog merely opening.

Now upgrade the agent. The gate runs an independent eval — and refuses any regression.
Every action ships a tamper-evident signed receipt.
It self-heals — reliability climbs, provably never-worse.