Z1 proxy gives Claude hands on React apps

Z1 bridges the gap between static code analysis and runtime execution, transforming Claude from a simple code generator into a full-cycle autonomous engineer.

• –Injectable client-side bundle provides LLMs with direct access to the React Fiber tree, component props, and state.
• –Zero-config integration allows it to wrap existing dev commands (e.g., `npm run dev`) without any application-level code changes.
• –MCP-based tooling enables agents to simulate backend failures, throttle network speeds, and manipulate the DOM via `z1_inject` and `z1_click`.
• –Local-first architecture ensures security by keeping all interception and log streaming on the developer's machine.
• –Represents a shift toward "agentic" developer tools that verify fixes against a running app rather than just passing unit tests.