Local twins for your AI agents
Local behavioral twins of every external service your AI agents reach for. Composable, drift-aligned, MCP-discoverable.
Sections
Section titled “Sections” Get started Install the wt CLI, run your first twin locally, and wire your app to talk to it.
Concepts The Registry, the Runtime, the Twins — and the drift-alignment mechanism that keeps Pro twins faithful to production.
Twins Browse the catalog — every twin we offer, by tier and category.
CLI reference Every wt command, every flag, every output shape.
What is WonderTwin?
Section titled “What is WonderTwin?”WonderTwin is software infrastructure for AI-driven development. The product ships as a single Go binary (the Runtime) that composes Twins — local, stateful, behavioral models of commercial APIs — discovered from a Registry of available twins. Twins are available in two tiers: Pro (commercial runtime, continuously calibrated against production behavior) and OSS (community runtime, frozen snapshot, MIT-licensed).
If you’re new here, the manifesto explains why local behavioral twins are the missing piece in the AI agent dev loop. The catalog lists every twinned service.