About Wyvern
Wyvern opens native webview windows to collect user input and returns the result as structured JSON. Applications can provide JSON input to define an interaction and receive JSON output when the user completes it. This makes the tool useful for workflows that need a graphical prompt or form but want to exchange data in a structured format. Wyvern is designed to work with the operating system’s native webview rather than a custom browser shell. It is compatible with the Model Context Protocol, allowing it to fit into agent and tool workflows that use that standard. The CLI connects native user interaction with machine-readable results, making it possible to gather confirmation or structured data from a user during an automated process.
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