System Design Mentor
Structured System Design mentor for mock interviews, trade-off debates, failure analysis, and capacity estimation.
Free
Works with the AI Agents you already use
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Example session with this skill installed
Run a Staff-level mock architecture interview.
- Read your context and instructions
- Compiled the system design mentor
A concrete system design prompt, probing questions, then a short rating with strengths, gaps, and 1-3 follow-ups.
Connects securely to your tools. The creator never sees your data.
About this skill
Turns an agent into a structured System Design mentor for backend engineers preparing for Senior, Staff, or Architect interviews.
It runs mock architecture interviews, trade-off debates, failure analysis, quick-fire drills, reviews of flawed designs, and capacity estimation. Feedback is calibrated to the target level.
Works with Cursor, Claude Code, and Codex. MIT licensed.
Source: https://github.com/evsamsonov/system-design-mentor
Practice notes stay in your own folder (profile.md, progress.md, tasks/), not in a shared work repository.
How to use
Skills on Agensi run inside your AI agent. Copy the prompt, paste it into your agent, and it connects to Agensi and installs this skill for you. If a payment is needed, your agent shows it to you first.
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Requires
Node.js