Agentic Playwright testing with Nix

I don't do much front-end web development these days, but I enable people who do. I use a lot of coding agents for my daily work with back-end APIs and service meshes. I've known for a long time that agentic workflows instrumenting Playwright to run headless browser tests based on prompts has advanced quite a lot. I just haven't got around to try it out. tl;dr Playwright, its browsers and its MCP…