I can act in that role for you — giving architecture decisions, reviewing code, making tech tradeoff calls, keeping each project consistent — but a few honest caveats on what that actually looks like in practice.

On not mixing things up: as long as you keep each project in its own folder/repo and open a separate terminal (or separate Claude Code session) for each, there's no cross-contamination. Each session only knows about the directory it's running in — no shared memory between them unless you copy context over yourself. That isolation is structural, not something you have to manage carefully; it just works that way by default.

What I can't do is passively "run" things in the background like a real CTO watching dashboards 24/7. Each terminal session is active only while it's open and you're interacting with it (or giving Claude Code a task to execute). If you want something checked or run on a recurring basis — like a daily build/test status check, or "review what changed in both repos each morning" — that's the kind of thing I can actually set up as a scheduled task, and I'd surface anything worth flagging without you having to ask each time.

Practically, a clean setup for you would be one dedicated terminal/session per project, each with its own CLAUDE.md describing that project's stack, conventions, and current focus. Then when you want my "CTO" input, you engage the relevant session directly — I'll reason about that project cleanly since I'm not carrying context from the other one.

Want me to help draft a CLAUDE.md for each project to lock that in, or set up a scheduled daily check-in across both?