AI-driven user testing for iOS Simulator, macOS apps, and web apps. Write a goal in plain language; an LLM agent drives the UI and reports friction. macOS 14+, Swift 6.
Latest release v0.8.4 — Harness v0.8.4 · 2 Sept 2026
3 files for GitHub Copilot, Codex, OpenCode and Gemini CLI: harness copilot-instructions.md, harness AGENTS.md, harness GEMINI.md — 2,968 tokens loaded in every session.
.github/copilot-instructions.md A 571 tok AGENTS.md A 1,826 tok GEMINI.md A 571 tok These files are awizemann/harness's own configuration — they tell GitHub Copilot, Codex, OpenCode and Gemini CLI how to work on this repository, so they are not mods to install elsewhere. Copy one as a starting point and replace the parts that are about this project.