Detect the available browser interaction layer and load the right commands — then navigate, click, fill, and screenshot through a unified verb set. playwright-cli is the default, recommended layer; falls back to Playwright MCP, cmux-browser, or CDP when it is absent. Use before any browser interaction in skills that shouldn't hardcode a specific layer. Triggers on: browser universal, detect browser, browser layer, browser setup, which browser, browser interaction, open browser, use browser.