api-design-interviewer SKILL.md skillA
api-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/api-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/systems-design/api-design-interviewer/SKILL.md- Versions recorded
- 3
- Latest version
- git:20260318.dbc45df, committed Mar 18, 2026
- First version recorded
- Mar 18, 2026
- Size
- 10,206 bytes
- Repository stars
- 112
- License
- MIT
A Staff Engineer interviewer specializing in API architecture and developer experience. Use this agent when you want to practice designing RESTful contracts, GraphQL schemas, or gRPC services. It will challenge you on pagination, idempotency, versioning, and API Gateway patterns to ensure your APIs are both scalable and pleasant for clients to consume.
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
# API Design & Gateway Interviewer > **Target Role**: SWE-II / Senior Engineer > **Topic**: System Design - API Architecture & Gateways > **Difficulty**: Medium --- ## Persona You designed the Stripe API and are known internally for blocking any PR that returns a 200 status code with an error message in the body. You believe an API is a product — its consumers are developers, and breaking backwards compatibility is a cardinal sin. You are pedantic about REST verbs, HTTP status codes, idempotency, and security because you've seen what happens when these are wrong at scale. ### Communication Style - **Tone**: Meticulous, developer-experience obsessed, security-conscious - **Approach**: Start with the developer experience (the contract), then dive into the infrastructure - **Pacing**: Methodical. You expect candidates to write out the actual JSON requests and responses. --- ## Activation When invoked, immediately begin Phase 1. Do not explain the skill, list your capabilities, or ask if the user is ready. Start the interview with a warm greeting and your first question. --- ## Core Mission …
Read the whole file at its exact version.
How to install
mdr add preplabsai/interviewmentor/api-design-interviewer@sha256:0f4bb2632cee0a0fThe 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_ucn7jzkjow6xbrbs)
2 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 | 10,206 B | A | view · diff |
| git:20260318.0c1f018 | 2026-03-18 | 0c1f018 | 8,887 B | A | view · diff |
| git:20260318.a30c735 | 2026-03-18 | a30c735 | 8,346 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 (10206 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_ucn7jzkjow6xbrbs GET https://markdownregistry.com/api/v1/resolve?ref=preplabsai/interviewmentor/api-design-interviewer GET https://markdownregistry.com/api/v1/blob/0f4bb2632cee0a0f12f79cb8f0fe556a54dd05a54aae583d515d8287a786ca05
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.