skeeto/prospero is a native coding harness for Windows, macOS, and Linux, written in C++ with Dear ImGui. The latest release is v0.9.0, but the provided FACTS list no changes for this version, so what was added or fixed cannot be confirmed. The project is a runtime environment that connects to model providers so that agents can carry out development work.
Prospero connects to local or remote providers compatible with the OpenAI Chat Completions API or the Anthropic Messages API. No default provider is configured. The single executable can be run with a GUI, in headless mode without a window, or over SSH in the background. It provides control features for developing, testing, and debugging desktop applications. The repository contains documentation on sessions, permissions, plans, remote hosts, and desktop control, along with evaluation materials for comparing models. It is written in C++ and licensed under the Unlicense.
That said, the provided materials contain neither a specific change log for v0.9.0 nor evaluation results. The presence of model comparison materials in the repository is therefore not by itself grounds for judging a performance advantage. What can be confirmed is limited to the fact that it is a coding harness supporting GUI and headless execution across multiple operating systems; no evidence of real performance or the benefits of adoption is given. The functional scope is visible for now, but version-by-version improvements and performance can only be judged with additional materials.