News

Posted on Oct 31

Edited on Oct 31

📅 October 31, 2026 • nullprogram.com

A new option for running coding agents on local hardware appeared on October 31, 2026. Prospero is a coding-agent harness written in C++ with a native Dear ImGui interface, designed for local and open-weight models first, while still working with hosted APIs. Its author announced it on nullprogram.com with the claim that it uses around two orders of magnitude fewer resources than other harnesses, without publishing benchmarks to back that up. A coding-agent harness is the layer around a language model that manages tools, files and the conversation while the model writes and edits code.

How it is built

Prospero ships with no built-in providers, which makes bring-your-own-backend the core design principle. The code is published under the Unlicense, which places it in the public domain.…