ScopeGate

Embodied AI Commerce Gateway for bespoke services: modular Skills for scope gating, SHA-256 contract locks, and PayPal milestone escrow before money moves.

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Inspiration

What it does

How we built it

Challenges we ran into## Inspiration

Independent creators lose hours and money to scope creep, prompt injection, and Item Not Received (INR) chargebacks. ScopeGate places an embodied AI Core Commerce Agent between buyer and seller—gating scope and anchoring cryptographic agreements directly onto PayPal's ledger before money moves.

What It Does

  1. Pre-Order Scope Referee: Isolates briefs in an XML sandbox to veto prompt injections and out-of-scope demands (REJECT) in ~1.5s, while calculating surcharges deterministically in code.
  2. SHA-256 & 40/60 Escrow Ladder: Freezes agreed deliverables and pricing into a 64-char SHA-256 hash, enforcing sequential 40% Deposit (m1) + 60% Balance (m2) gating (HTTP 409 on stage bypass).
  3. Physical PayPal custom_id Anchor: Embeds custom_id = "<contract_hash>:<milestone>" into PayPal Orders v2 (NO_SHIPPING), verified live via GET /v2/checkout/orders/{id} in our Official Ledger Receipt.
  4. Automated Defense Brief (PDF): Logs buyer download IP, User-Agent, and SHA-256 proof, compiling a PayPal Seller Protection-compliant Defense Letter PDF for POST /v1/customer/disputes/{id}/provide-evidence.

Built With & Verified Proof

  • Stack: Node.js (>=22), Express, PayPal Orders v2 & Disputes API (Sandbox), GLM glm-5.3-flash, SHA-256.
  • Verified: 56/56 eval assertions passing (npm run eval) and live PayPal Sandbox dispute PP-R-LKW-10194104 successfully submitted to UNDER_PAYPAL_REVIEW.

Judge Quick Trial (2 Minutes · No Install)

  1. Click Alex · Fullstack → open 💡 Preset Scenarios ▼ at the top.
  2. Test Scope Creep: Native Mobile Apps → instant REJECT.
  3. Test Product Launch Landing Page → instant ACCEPT ($500) → click ✓ Sign & Create Order.
  4. Click Pay m1 · $200.00 (approve in PayPal Sandbox) → click Download deliverable → inspect 🧾 Official Receipt ↗ and 📦 Simulate INR Dispute → 📄 View Defense PDF ↗.

Accomplishments that we're proud of

What we learned

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