STeam Hashes · AI Builder Cup 2026

Two builders, one engine.

SafeShelf was built in a week for the Retail and Commerce theme of the AI Builder Cup 2026. We split the work into a brain and a face, agreed the shape of every API answer on day one, and built against it in parallel.

GitHubSee the results

Solomon

The brain: engine, data and API

  • Recall and notice data from 8 regions
  • Product identity and copy matching
  • Safety radar, recall and safety-mark checks
  • "Is it real?" listing checks
  • The API, the MCP server and the WhatsApp bot
  • SafeShelfBench and the backtest

Seshu

The face: extension, agents and web

  • Chrome extension and accessibility
  • Google ADK agents: Investigate, Shelf Chat, Safer Alternative
  • My Shelf, scan and report
  • The web page and Google sign-in
  • Voice answers
  • The judges' lab

Google Cloud, end to end.

The same stack serves the extension, the web page, WhatsApp and other agents.

Gemini on Vertex AI

Product matching, hazard reading and the plain-language explanation.

Google ADK

The investigating and chat agents.

Cloud Run

The API and MCP server, in Mumbai (asia-south1).

Cloud SQL

The catalog, recalls and reviews.

Firebase

Hosting, Google sign-in and roles in Firestore.

Chrome MV3 · WhatsApp Cloud API

Where shoppers meet it.

Read the code. All of it.

Everything on this site is in one repository.

GitHubSee the results