Cline

Cline is an open source coding agent used by developers inside IDEs, terminals, and now a standalone desktop app, with this launch spotlighting a new plugin called jev-browser that gives the agent its own browser to work in. Installed through the desktop app's Marketplace under Customize, Plugins, the plugin hands Cline an isolated Playwright Chromium browser through normal Cline tools and delegates bounded browser goals to Jev through Vercel AI Gateway, with automatic before/after screenshots and optional manual actions . Setup requires generating a Vercel AI Gateway API key and saving it into the plugin configuration. The technical split is what makes this interesting for anyone building agentic workflows. Jev uses DOM observations for its action loop, while Cline receives screenshots to independently verify the outcome , so the reasoning model that drives the clicks never has to interpret pixels and the supervising agent still gets a visual audit trail. The main entrypoint, jev_run, takes a URL and a goal, then executes bounded actions against a snapshot of visible DOM targets, which keeps browser use predictable enough to slot into longer coding tasks. Cline itself was founded by Saoud Rizwan and positions the product as an open-source AI coding agent that automates software creation tasks within integrated development environments . The jev-browser plugin matters right now because it is one of the first third-party entries shipping through Cline's new desktop Marketplace, and it shows how the plugin surface can add whole new tool categories (in this case, a fully isolated browser powered by a different model provider) without changes to the core agent.