system-design-frameworks SKILL.md skillA

system-design-frameworks from zoolcoder/scoutjobs is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned
mdr add zoolcoder/scoutjobs/system-design-frameworks@git:20261018.2e6d9bd

Pins git:20261018.2e6d9bd in mdr.lock. Pin the fingerprint instead.

Audit grade
A, 17 of 17 checks passed
Kind
SKILL.md skill
Repository
zoolcoder/scoutjobs
Path
skills/system-design-frameworks/SKILL.md
Versions recorded
2
Latest version
git:20261018.2e6d9bd, committed Oct 18, 2026
First version recorded
Oct 11, 2026
Size
11,077 bytes
Repository stars
3
License
MIT

Reference frameworks (RESHADED, the 4S shorthand), capacity estimation cheatsheet, core building blocks (load balancing, caching, queues, sharding, replication, CAP), common tradeoffs, and anti-patterns for system design interview prep. Use when running /mock-sysdesign, /practice-sysdesign, /sysdesign-explain, or /debrief-sysdesign, or whenever discussing architecture, capacity estimation, or design tradeoffs.

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

# System Design Frameworks

## RESHADED framework

Default structure for a 45-60 minute open-ended design question. Budget roughly 10 minutes for Requirements + Estimation, 20-25 for Storage through Detailed design, 10 for Evaluation + wrap-up. Announce each stage transition out loud — interviewers score process, not just the final diagram.

### Requirements

- Split functional (what the system does) from non-functional (latency, availability, consistency, durability targets).
- Ask scoping questions before drawing anything: who uses it, what ships in v1, read-heavy or write-heavy?
- Attach numbers to non-functional requirements: "redirect p99 < 100 ms", "99.9% available" — never "fast and reliable".
- Restate the agreed scope and get explicit interviewer sign-off before moving on.

**Weak:** "A URL shortener — okay. I'll hash the URL, store the mapping in a database, and redirect on lookup."

**Strong:** "Scope check first: shorten and redirect are v1; custom aliases and analytics are out. I'll assume ~100:1 read:write. Non-functional targets: redirect p99 < 100 ms, 99.9% availability, and no mapping may ever be lost — durability beats freshness here."

### Estimation
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint
mdr add zoolcoder/scoutjobs/system-design-frameworks@sha256:06aaf96a7d779a55

The line at the top of this page pins the label git:20261018.2e6d9bd, 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.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_tcuacporxildea4r.svg)](https://markdownregistry.com/a/art_tcuacporxildea4r)

2 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 2 versions of this file, between Oct 11, 2026 and Oct 18, 2026, about one every 7 days.

versioncommittedcommitsizeaudit
git:20261018.2e6d9bd latest2026-10-18 2e6d9bd 11,077 BA view · diff
git:20261011.1b0ba962026-10-11 1b0ba96 18,554 BA view

Audit of the latest version

A  17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (11077 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

GitHub

zoolcoder/scoutjobs · 3 stars · license MIT · pushed 2026-10-18 · branch develop

API

GET https://markdownregistry.com/api/v1/artifacts/art_tcuacporxildea4r
GET https://markdownregistry.com/api/v1/resolve?ref=zoolcoder/scoutjobs/system-design-frameworks
GET https://markdownregistry.com/api/v1/blob/06aaf96a7d779a5583a9e9b8ce0874475816b60db123bb5dfe120181f7afeba9

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.

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