ZEUS GUARD — Pre-Transaction Firewall for Everyday Traders.

Robinhood Chain will onboard millions of first-time on-chain users. These users lose billions every year to drainer approvals, address poisoning, and avoidable liquidations — and no wallet in the ecosystem ships a guardian.

ZEUS GUARD is a pre-transaction firewall for everyday traders. Every transaction is simulated and analyzed before signing: drainer approvals get BLOCKED, risky ones raise an alert, safe ones flow. Dangerous approvals are auto-revoked by the guardian without user action. USDG payments sit in an escrow vault with a challenge window, so a drainer cannot move funds in the same block. An emergency circuit breaker freezes an entire session during an active attack. All telemetry lands on a public Dune dashboard.

How it's built: a Rust policy contract via Arbitrum Stylus (guardian sessions, approval registry with risk scores, USDG escrow, circuit breaker) plus a dissipative-selection risk engine (Gibbs quench β 2→40 over attack archetypes). The engine classifies transactions in ~1.1 ms and scored 100% on our benchmark suite vs 95% for a fixed-threshold baseline. The same selection mechanism was validated on real IBM Quantum hardware (ibm_fez). Honest caveat: benchmark uses synthetic, well-separated attack archetypes; production data will be noisier.

Why this wins users: Robinhood's whole brand is protecting retail. Zeus Guard gives their on-chain users what the app gave stock traders: a guardian that watches every move before money leaves.

Day 1 (Sep 22): dissipative-selection risk engine implemented and benchmarked — 40/40 accuracy on 5 attack archetypes, 1.1 ms per transaction. Stylus Rust contract drafted: guardian sessions, approval registry with risk scores, USDG escrow with challenge window, emergency circuit breaker. Next steps: cargo-stylus deploy to Robinhood Chain testnet, tx-simulation agent, frontend dashboard, Dune telemetry, 3-min demo video.

Final (Oct 1): ZEUS GUARD v6 hardened is LIVE on Arbitrum Sepolia — 0x9b7608536a9704e120f0fc2c6722e2abb0fef848 (Stylus/Rust, activated and ArbOS-cached). The oracle multisig 2-of-3 sits in the money path: vault_send requires a signed risk bundle, and a live red-team run scored 10 PASS / 0 FAIL (forged-risk, bundle-swap and nonce-replay all reverted on-chain, hashes in the repo). Full open-source repo with judge guide and replayable cast commands: github.com/clebson-scott/zeus-guard. Live web demo wallet wired to the contract (read-only): see MVP link. New English and Portuguese demo videos uploaded.