#mcp

The architecture for letting an agent (or CI) drive the live s&box editor: compile-gate, spawn, play, inject input, read telemetry, screenshot, assert, and gate a merge on the numbers, with no human at the keyboard.

Glyph-block corruption in an MCP camera_screenshot is a capture-path artifact, not a live-render bug. The same UI renders text perfectly on the real screen. You cannot screenshot your way out of it: the requested width/height does not change the UI render scale, and sub-native requests crop the top-left. Verify geometry from a capture, never text fidelity; font-face and legibility are owner-eyeball checks.

The engine ships its built-in [McpTool]s as full C# source, not compiled DLLs: check addons/tools/Code/Mcp/*.cs for canonical patterns before inventing your own.

The editor MCP port is one engine-global preference, not a per-project setting. When the configured port is already bound by another open editor, the second editor logs a bind failure and starts no MCP server at all; it does not auto-increment to a free port. Bump the port by hand before (or after) launching the second editor, and have agents discover the live port by scanning and matching the Project field instead of pinning a number.