Playwright-core is the foundation of the Playwright testing and automation library. It provides the core APIs for interacting with Chromium, Firefox, and WebKit browsers. Unlike "playwright", it doesn't bundle browser binaries, offering a smaller installation footprint for advanced users who manage browser installations independently. It's ideal when you need precise control over browser versions or embedding Playwright within existing browser environments. Leveraging its APIs, you can automate browser actions, capture screenshots, and emulate user interactions.