trycua ships CUA-S1, small "System 1" models for bounded computer-use decisions, with weights on Hugging Face

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trycua/cua (25,471 stars) introduced CUA-S1 in its README on 2026-09-19 via PRs #3992 and #3994 — a family of small specialized System 1 models for computer use, drawing an explicit line between bounded decisions and general agent planning. The first artifact, cua-s1-forms, is public and ungated on Hugging Face under MIT (89 likes at time of check), and community ports already exist: FluidInference/cua-s1-forms-coreml (35 downloads) and yasserrmd/cua-s1-forms-onnx, both updated within a day. The repo is explicit that the GitHub component is source-only, early research, and that weight terms for future releases are not settled — worth noting before anyone plans around the MIT label.