api-shape-explorer SKILL.md skillA

api-shape-explorer from zebbern/claude-code-guide is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned
mdr add zebbern/claude-code-guide/api-shape-explorer@git:20260531.164971d

Pins git:20260531.164971d in mdr.lock. Pin the fingerprint instead.

Audit grade
A, 17 of 17 checks passed
Kind
SKILL.md skill
Repository
zebbern/claude-code-guide
Path
skills/api-shape-explorer/SKILL.md
Versions recorded
1
Latest version
git:20260531.164971d, committed May 31, 2026
Size
3,365 bytes
Repository stars
4,666
License
MIT

Generate multiple radically different interface designs for a module using parallel sub-agents. Use when user wants to design an API, explore interface options, compare module shapes, or mentions "design it twice".

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

# Design an Interface

Based on "Design It Twice" from "A Philosophy of Software Design": your first idea is unlikely to be the best. Generate multiple radically different designs, then compare.

## Workflow

### 1. Gather Requirements

Before designing, understand:

- [ ] What problem does this module solve?
- [ ] Who are the callers? (other modules, external users, tests)
- [ ] What are the key operations?
- [ ] Any constraints? (performance, compatibility, existing patterns)
- [ ] What should be hidden inside vs exposed?

Ask: "What does this module need to do? Who will use it?"

### 2. Generate Designs (Parallel Sub-Agents)

Spawn 3+ sub-agents simultaneously using Task tool. Each must produce a **radically different** approach.

```
Prompt template for each sub-agent:

Design an interface for: [module description]

Requirements: [gathered requirements]

Constraints for this design: [assign a different constraint to each agent]
- Agent 1: "Minimize method count - aim for 1-3 methods max"
- Agent 2: "Maximize flexibility - support many use cases"
- Agent 3: "Optimize for the most common case"
- Agent 4: "Take inspiration from [specific paradigm/library]"

Output format:
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint
mdr add zebbern/claude-code-guide/api-shape-explorer@sha256:e4c35d909cc5e9bd

The line at the top of this page pins the label git:20260531.164971d, 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_qmlyfr65mmwfgm44.svg)](https://markdownregistry.com/a/art_qmlyfr65mmwfgm44)

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

Versions

The registry has recorded 1 version of this file, committed on May 31, 2026.

versioncommittedcommitsizeaudit
git:20260531.164971d latest2026-05-31 164971d 3,365 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 (3365 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

zebbern/claude-code-guide · 4,666 stars · license MIT · pushed 2026-10-19 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_qmlyfr65mmwfgm44
GET https://markdownregistry.com/api/v1/resolve?ref=zebbern/claude-code-guide/api-shape-explorer
GET https://markdownregistry.com/api/v1/blob/e4c35d909cc5e9bdbc31aa8359af6fb0e00f5659904e55cc3d2c8c11c72f7cb0

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.

More from zebbern/claude-code-guide

academic-paper-reviewer SKILL.md skill
zebbern/claude-code-guide · skills/academic-paper-reviewer/SKILL.md · Simulates academic peer review, evaluating papers across Originality, Methodology, Results, and Writing to provide…
git:20260531.164971d · audit A · 4,666 stars
active-directory-attacks SKILL.md skill
zebbern/claude-code-guide · skills/active-directory-attacks/SKILL.md · This skill should be used when the user asks to "attack Active Directory", "exploit AD", "Kerberoasting", "DCSync"…
v1.1 · audit A · 4,666 stars
api-fuzzing-bug-bounty SKILL.md skill
zebbern/claude-code-guide · skills/api-fuzzing-bug-bounty/SKILL.md · This skill should be used when the user asks to "test API security", "fuzz APIs", "find IDOR vulnerabilities", "test…
v1.1 · audit C · 4,666 stars
audit-flow SKILL.md skill
zebbern/claude-code-guide · skills/audit-flow/SKILL.md · Interactive system flow tracing across CODE, API, AUTH, DATA, NETWORK layers with SQLite persistence and Mermaid…
v1.0.0 · audit A · 4,666 stars
authentication-patterns SKILL.md skill
zebbern/claude-code-guide · skills/authentication-patterns/SKILL.md · Authentication patterns: session vs JWT vs OAuth comparison, provider selection (NextAuth, Clerk, Supabase Auth)…
git:20260531.164971d · audit A · 4,666 stars
aws-penetration-testing SKILL.md skill
zebbern/claude-code-guide · skills/aws-penetration-testing/SKILL.md · This skill should be used when the user asks to "pentest AWS", "test AWS security", "enumerate IAM", "exploit cloud…
v1.1 · audit B · 4,666 stars
broken-authentication SKILL.md skill
zebbern/claude-code-guide · skills/broken-authentication/SKILL.md · This skill should be used when the user asks to "test for broken authentication vulnerabilities", "assess session…
v1.1 · audit A · 4,666 stars
burp-suite-testing SKILL.md skill
zebbern/claude-code-guide · skills/burp-suite-testing/SKILL.md · This skill should be used when the user asks to "intercept HTTP traffic", "modify web requests", "use Burp Suite for…
v1.1 · audit B · 4,666 stars
caching SKILL.md skill
zebbern/claude-code-guide · skills/caching/SKILL.md · Caching strategies — invalidation, TTL guidelines, cache keys, cache layers, and when not to cache. Use when…
git:20260531.164971d · audit A · 4,666 stars
chart-image SKILL.md skill
zebbern/claude-code-guide · skills/chart-image/SKILL.md · Generate publication-quality PNG chart images from data, supporting line, bar, area, candlestick, pie, and heatmap…
v2.5.1 · audit A · 4,666 stars
cloud-penetration-testing SKILL.md skill
zebbern/claude-code-guide · skills/cloud-penetration-testing/SKILL.md · This skill should be used when the user asks to "perform cloud penetration testing", "assess Azure or AWS or GCP…
v1.1 · audit C · 4,666 stars
code-documenter SKILL.md skill
zebbern/claude-code-guide · skills/code-documenter/SKILL.md · Use when adding docstrings, creating API documentation, or building documentation sites. Invoke for OpenAPI/Swagger…
v1.0.0 · audit A · 4,666 stars

Every file in zebbern/claude-code-guide

Browse by kind, by grade A, or by owner.