Send the sharp feedback, not the polite feedback.

Right now the best contact path is direct email. That keeps feedback tight while StackMax is still taking shape.

If you are reaching out about product feedback, include the workflow you were trying to complete, what felt unclear, and what you expected to happen instead.

The most useful notes are about trust, readability, and decision quality: where the UI feels too certain, where evidence is hard to inspect, and where a stack builder would still need another tool.

That is the leverage right now. Not cosmetic opinions in a vacuum.