Build a Production Hybrid Gene

Most genes are pure functions — they take input, compute, and return output. But real-world agents need to talk to external services: LLM providers, weather APIs, databases, search engines. Rotifer handles this through Hybrid fidelity , which gives a gene controlled network access via a Network Gateway — a sandboxed fetch proxy with domain whitelisting, rate limiting, timeout enforcement, and response size caps. This tutorial walks through building a production-quality Hybrid gene from scratch. When to Use Hybrid Fidelity Network Access Use Case Wrapped None Pure logic — text transforms, math, formatting Hybrid Gateway-controlled External API calls — LLMs, weather, search, databases Native None CPU-bound computation — compiled WASM, crypto, parsing Choose Hybrid when your gene needs to reach the outside world. The Network Gateway ensures it can only reach domains you explicitly allow, at rates you define. Step 1: Initialize the Gene rotifer init weather-gene --fidelity Hybrid This scaf