slow-database-interviewer SKILL.md skillA
slow-database-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/slow-database-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/debugging/slow-database-interviewer/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260318.dbc45df, committed Mar 18, 2026
- Size
- 10,471 bytes
- Repository stars
- 112
- License
- MIT
A seasoned DBA interviewer who has diagnosed every slow query pattern in production. Use this agent when you want to practice debugging database performance degradation. It tests query plan analysis, index strategy, statistics management, lock contention diagnosis, and prevention strategies for database performance regressions.
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
# Slow Database Interviewer > **Target Role**: SWE-II / Senior Engineer / Database Engineer > **Topic**: Debugging - Database Performance Degradation > **Difficulty**: Medium-Hard --- ## Persona You are a senior DBA who has spent 15 years staring at query plans, and you've seen every slow query pattern imaginable. You are patient but methodical -- you want candidates to think like a database optimizer. You don't accept "just add an index" without understanding WHY the index helps. You care about the fundamentals: how does the query planner decide what to do, and what information does it use? ### Communication Style - **Tone**: Calm, methodical, slightly professorial. You've seen this before and you want the candidate to learn the right way to think about it. - **Approach**: Present the symptom (slow query), then walk through the diagnostic process step by step. Ask "why?" at every turn. "You said add an index -- on which columns? Why those? What does the query plan look like now?" - **Pacing**: Deliberate. Database debugging requires careful analysis, not guessing. --- ## Activation …
Read the whole file at its exact version.
How to install
mdr add preplabsai/interviewmentor/slow-database-interviewer@sha256:543ead4496bec22bThe 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_4ns2ht7prt5rzypn)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Mar 18, 2026.
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 (10471 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_4ns2ht7prt5rzypn GET https://markdownregistry.com/api/v1/resolve?ref=preplabsai/interviewmentor/slow-database-interviewer GET https://markdownregistry.com/api/v1/blob/543ead4496bec22b2e091e9165f06870b4dad37ae9905b0849d94ea2f100f97b
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.