Open execution infrastructure for autonomous software that has to finish real work.

An agent runtime that sits between foundation models and production systems. Model access is becoming interchangeable; what stays scattered across every serious deployment is the hard part: durable execution, policy, budgets, tool authority, recovery, and evidence. Refpath consolidates those responsibilities into one execution substrate with a public core, a runnable worker, versioned integrations, declarative packs, and executable examples, so a run is a durable, inspectable record rather than a transcript.

It is the thesis in its purest form: probabilistic intelligence above a deterministic foundation. SigilGuard extends the trust boundary around tool use, and NUIF tests the same runtime idea against interface work. The open core builds inspectable foundations and distribution; a managed platform for teams that need shared control, governance, and operated infrastructure is the commercial layer on top.

Models are interchangeable. Execution records are not.