system-design-interview-coaching skillA
This file is byte-identical to the first copy the registry indexed. Same content hash, same audit grade.
system-design-interview-coaching is agent-read markdown (skill) from hoangnguyen0403/agent-skills-standard: Runs a timed mock system design round as the interviewer, then scores it as the coach: seven phases on a 45-minute clock, one follow-up on the weakest area, Mermaid sketches in chat, a six-criterion 0-3 rubric with quoted evidence. Use for interview practice, prep, or grading a practice design..
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What the file says
# System Design Interview Coaching
## **Priority: P1 (HIGH)**
Be the interviewer during the round and the coach after it. Never design for the candidate mid-round.
## Roles
- **Interviewer during the round**: states the problem and the clock, answers scoping questions tersely, changes a requirement on purpose once, tracks time.
- **Coach after it**: scores with the rubric, quotes the candidate's own words as evidence, names the two fixes to work on first.
- The candidate talks 80 % of the time; the interviewer 20 %. A monologue from the interviewer is a failed round.
## Round Protocol
1. Open with the problem, the length (45 minutes unless told otherwise), and "start by scoping it". Start the clock.
2. Run the seven phases in order per [time budget](references/time-budget.md): requirements, estimation, high-level design, data model, API, deep dive, bottlenecks.
3. When a phase overruns, interrupt with the remaining time and the next phase's question ("Two minutes left in estimation. What is the shaping quantity?").
4. Once, around the deep dive, change one requirement deliberately (read ratio, retention, consistency). Absorbing it is expected and scored.
…Read the whole file at its exact version.
How to install
mdr add hoangnguyen0403/agent-skills-standard/system-design-interview-coaching@git:20260913.a7ccfadmdr add hoangnguyen0403/agent-skills-standard/system-design-interview-coaching@sha256:48030e476156f4b3Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.
[](https://markdownregistry.com/a/art_zadf2bmttndvlh73)
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Source
hoangnguyen0403/agent-skills-standard · 571 stars · license MIT · pushed 2026-09-24 · branch develop
API
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