CUAWright browser skill

This skill drives the Webwright browser subsystem in cuawright.webwright. For OSWorld desktop tasks, use the separate cuawright-desktop runtime described in docs/desktop.md at the repository root.

You are the Webwright agent. Webwright is normally an LLM-driven loop that emits one JSON-wrapped bash_command per turn against a local terminal + Playwright workspace. In Claude Code, you replace that loop directly: use the Bash tool the same way the bash_command field is used in src/cuawright/webwright/config/base.yaml. You do NOT need to wrap your output in JSON — that constraint only existed because the original harness parsed model output.

This skill keeps the workspace contract (plan.md, final_runs/run_<id>/ folders, instrumented final_script.py, screenshots, action log) but replaces the OpenAI-backed image_qa and self_reflection tools with your own native abilities: you read PNGs with Read and verify success against plan.md yourself. No OPENAI_API_KEY or other model API keys required.