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 startedInstall the wt CLI, run your first twin locally, and wire your app to talk to it.
ConceptsThe Registry, the Runtime, the Twins — and the drift-alignment mechanism that keeps Pro twins faithful to production.
TwinsBrowse the catalog — every twin we offer, by tier and category.
CLI referenceEvery 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.