Claude App Control SDK

Tesseron is a protocol + TypeScript SDK that lets MCP-compatible AI agents invoke real actions in browser tabs, Electron/Tauri desktop apps, Node daemons, and CLIs over WebSocket.

The architecture flows user → app → MCP gateway → MCP client, with the gateway bridging WebSocket and MCP stdio. App developers register typed actions using @tesseron/web, @tesseron/server, and @tesseron/react, and agents use them like MCP tools. Instead of scraping the UI or manipulating it with Playwright, the agent directly executes the handlers exposed by the app.

Key features include the following.

• Connects via a 6-digit claim-code handshake, requiring no API keys or OAuth setup
• Supports ctx.confirm, ctx.elicit, ctx.progress, and ctx.sample
• Uses Zod-first action definitions
• Provides examples in pure TypeScript, React, Svelte, Vue, Express, and Node
• Ships the MCP gateway as a Claude Code plugin

Documentation and examples have also been released alongside it.