ZoneZero

The problem. Fire-safety research from IBHS finds that most homes lost in wildfires are ignited by embers, through small details near the house: needle-filled gutters, open vents, a wood fence touching the wall, bark mulch against the siding. California’s new Zone 0 rules target the first 5 feet around a home. Meanwhile, insurers are dropping homeowners in fire zones, and a professional assessment takes weeks. Homeowners don’t know which fix actually matters. What it does. You upload a short walk-around video, and ZoneZero: Watches. Gemini 4 Argon reviews the video and lists every ember hazard, with the timestamp where it’s visible. Models. Argon writes a 3D model of the property in one pass. It then renders the model from the video’s own viewpoints and corrects it until the renders match the real footage. Burns. A seeded, repeatable ember storm runs on the model and logs the ignition chain. In our demo run, a shrub caught first, then the fence, then the neighbor’s siding, and the house ignited at 60 seconds. Fixes and verifies. Argon picks fixes only from a fixed catalog of 14 measures and reruns the same storm with the same wind and the same random seed. The simulator, not the model, decides whether the chain broke. Checks every wind. 24 Managed Agents test the hardened home in parallel: 8 wind directions × 3 trials, with every result re-checked locally. In the demo, 20 of 24 scenarios ignited before the fixes and 0 of 24 after. Plans. The homeowner gets a ranked action plan with cost bands and a Zone 0 checklist. Guardrails. Generated scene code runs in a sandbox and passes a validator before it’s used. Fixes can only come from the catalog. Every number on screen comes from recorded simulation results, never from the model’s text. Fixes that were tested together are labeled as a set and kept separate from untested suggestions. Built with: Gemini 4 Argon (agentic video understanding, long output, multimodal self-checking), Gemini 3.8 Flash, Antigravity Managed Agents, Three.js, FastAPI and Playwright. ZoneZero is a planning aid based on IBHS and CAL FIRE ember guidance. It is not a certified assessment.