api-design SKILL.md skillA
api-design from martinolivero/saas-builder is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add martinolivero/saas-builder/api-design@git:20261007.f2beefePins git:20261007.f2beefe in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- martinolivero/saas-builder
- Path
skills/api-design/SKILL.md- Versions recorded
- 2
- Latest version
- git:20261007.f2beefe, committed Oct 7, 2026
- First version recorded
- Jun 6, 2026
- Size
- 5,372 bytes
- Repository stars
- 4
- License
- MIT
This skill should be used when designing or building an API — endpoints, routes, request/response shapes, error formats, pagination, versioning, or deciding REST vs GraphQL. Trigger phrases include "design the API", "build an endpoint", "REST or GraphQL", "how should I structure my routes", "API error format", "paginate results", "version my API", "validate env vars", "idempotency", "what should this endpoint return". It applies proven REST conventions and a clear REST-vs-GraphQL decision…
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 This skill turns "I need an endpoint" into an API that is consistent, predictable, and safe to evolve. It encodes the conventions that the best public APIs (Stripe, Microsoft, GitHub) share. Analogy: an API is the menu of a restaurant. A good menu is consistent — every dish described the same way, prices where you expect, no surprises. A messy menu makes every order a negotiation. ## Discovery (max 3 questions, only if unknown) 1. Who consumes this — your own React SPA only, or also mobile / partners / the public? 2. Is it mostly simple CRUD, or deeply nested reads across many relations? 3. Is it public-facing (needs versioning + stability) or internal? ## Step 1 — REST vs GraphQL (decide first) **Default to REST.** Reach for **GraphQL only when**: clients need flexible, deeply nested reads across many relations; you have multiple divergent clients (web + mobile + partners); or you're composing several backend services. For a single React SPA on one Postgres DB, REST (or tRPC for end-to-end TS types) is simpler and cacheable. If you do choose GraphQL: - **Solve N+1 from day one with DataLoader** (batch + cache per request). …
Read the whole file at its exact version.
How to install
mdr add martinolivero/saas-builder/api-design@sha256:5231457a449f76d7The line at the top of this page pins the label git:20261007.f2beefe, 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_ypp25kumwfj7tpkg)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Jun 6, 2026 and Oct 7, 2026, about one every 123 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261007.f2beefe latest | 2026-10-07 | f2beefe | 5,372 B | A | view · diff |
| git:20260606.1d02dd6 | 2026-06-06 | 1d02dd6 | 4,346 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 (5372 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
martinolivero/saas-builder · 4 stars · license MIT · pushed 2026-10-11 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_ypp25kumwfj7tpkg GET https://markdownregistry.com/api/v1/resolve?ref=martinolivero/saas-builder/api-design GET https://markdownregistry.com/api/v1/blob/5231457a449f76d7151ba62a67f9c62163e6a3b7513f526a5d397e50af1b789a
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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