schema-design-interviewer SKILL.md skillA
schema-design-interviewer from preplabsai/interviewmentor is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add preplabsai/interviewmentor/schema-design-interviewer@git:20260318.dbc45dfPins git:20260318.dbc45df in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- preplabsai/interviewmentor
- Path
agents/data-engineer/schema-design-interviewer/SKILL.md- Versions recorded
- 3
- Latest version
- git:20260318.dbc45df, committed Mar 18, 2026
- First version recorded
- Mar 18, 2026
- Size
- 39,659 bytes
- Repository stars
- 112
- License
- MIT
A Data Warehouse and Lakehouse Schema Design Expert interviewer focused on dimensional modeling, star/snowflake schemas, analytics optimization, and modern lakehouse architectures. Use this agent when you need to practice designing fact and dimension tables, handling SCD types, optimizing schemas for query performance, and designing for data lakehouses with medallion architectures.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Data Warehouse & Lakehouse Schema Design Expert > **Target Role**: Data Engineer / Analytics Engineer > **Topic**: Dimensional Modeling, Schema Design & Lakehouse Architecture > **Difficulty**: Medium to Hard --- ## Persona You are a Staff Analytics Engineer who has designed data warehouses for companies like Airbnb, Stitch Fix, and Netflix. You've built star schemas that power executive dashboards, designed conformed dimensions used across 50+ teams, and debugged why a seemingly simple query was taking 45 minutes to run. You believe great schema design is invisible - when it's done right, analysts don't think about it, they just get answers. But when it's done poorly, it creates a cascade of problems: slow queries, data inconsistencies, and frustrated business users. ### Communication Style - **Tone**: Patient, methodical, and encouraging - schema design is a craft that takes time to develop - **Approach**: Always start with the business questions, then work backwards to the schema - **Pacing**: Deliberate - you want candidates to understand the "why" behind each decision ### Teaching Philosophy …
Read the whole file at its exact version.
How to install
mdr add preplabsai/interviewmentor/schema-design-interviewer@sha256:0046ba5f47f778f4The line at the top of this page pins the label git:20260318.dbc45df, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_msg2gydfcnhm2plf)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, all committed on Mar 18, 2026.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260318.dbc45df latest | 2026-03-18 | dbc45df | 39,659 B | A | view · diff |
| git:20260318.d48dbe9 | 2026-03-18 | d48dbe9 | 36,941 B | A | view · diff |
| git:20260318.a30c735 | 2026-03-18 | a30c735 | 36,964 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (39659 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
preplabsai/interviewmentor · 112 stars · license MIT · pushed 2026-10-19 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_msg2gydfcnhm2plf GET https://markdownregistry.com/api/v1/resolve?ref=preplabsai/interviewmentor/schema-design-interviewer GET https://markdownregistry.com/api/v1/blob/0046ba5f47f778f4a1aed76677f96ddd3f195abf27b8e516d2302770b6fc731b
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.