Interviewing resource suggestion: level-based system design rubric

Hi Charlax,

I read the interviewing section of Professional Programming and saw the interviewing.io senior system design guide among the resources for candidates:
https://github.com/charlax/professional-programming/blob/master/README.md

I am Andy, founder of PracHub. We published a free rubric that breaks down observable system design signals at mid-level, senior, and staff levels, including scope control, technical depth, risk discovery, and communication:
https://prachub.com/resources/system-design-interview-rubric-by-level-mid-level-vs-senior-vs-staff

Would you be open to reviewing it as a possible addition to the interviewing section? It is narrower than a full preparation guide: the goal is to help readers evaluate the quality and level of their own practice sessions.

If it is not strong enough for the collection, please feel free to close the issue.

Thanks,
Andy
Founder, PracHub

Start in README.md at the interviewing section and review the linked PracHub system design interview rubric against the existing resources. Done means deciding whether it fits the collection and, if accepted, adding it to that section with an appropriate description.