GoNoGo

GoNoGo is a tool-using AI agent that helps people decide whether to go ahead with weather-dependent plans, like picnics, rooftop parties, outdoor markets, or community events, by combining two things usually checked separately: live weather and real cost math. Describe your plan in plain language (location, date, headcount, budget), and the agent checks live weather for that location and date, then uses the result to calculate your actual per-person cost, including a backup-plan cost if rain risk is high. It's built on OpenAI function calling with two real tools: a live Open-Meteo weather lookup and a deterministic cost calculator, where the weather result directly feeds into the cost decision instead of just being displayed alongside it. The agent also knows when not to use its tools. General questions get answered directly, and attempts to misuse the calculator for unrelated purposes are politely declined. Chat history persists across sessions in a sidebar, so past plans can be revisited anytime. (Built for the Section B problem statement.)