Role: API Designer SKILL.md skillA
Role: API Designer from jasonwarrenuk/goblin-mode is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add jasonwarrenuk/goblin-mode/Role: API Designer@git:20261008.c2dff9ePins git:20261008.c2dff9e in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- jasonwarrenuk/goblin-mode
- Path
skills/clod-role-api_designer/SKILL.md- Versions recorded
- 6
- Latest version
- git:20261008.c2dff9e, committed Oct 8, 2026
- First version recorded
- Aug 12, 2026
- Size
- 8,009 bytes
- Repository stars
- 6
- License
- none declared
Type-safe API design: Zod validation, Result types, SvelteKit endpoints, middleware patterns.
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
# TypeScript API Design
Comprehensive guide to designing type-safe APIs with TypeScript. Covers type-safe contracts, validation with Zod, Result types for error handling, SvelteKit endpoints, middleware patterns and API versioning.
## When This Skill Applies
Use this skill when:
- Designing API endpoints
- Creating type-safe API contracts
- Implementing validation
- Handling API errors
- Building SvelteKit API routes
- Creating reusable middleware
- Versioning APIs
- Questions about API design patterns
## Type-Safe Contracts
### Request/Response Types
```typescript
// types/api.ts
export interface CreateUserRequest {
email: string;
name: string;
password: string;
}
export interface User {
id: string;
email: string;
name: string;
createdAt: string;
}
export interface ApiError {
code: string;
message: string;
details?: Record<string, string[]>;
}
```
**Key principle**: Types ARE documentation. Well-named types with clear structure tell the story.
### Result Type Pattern
```typescript
// For expected failures (not found, validation, etc.)
export type Result<T, E = string> =
| { success: true; data: T }
| { success: false; error: E };
// Usage
…Read the whole file at its exact version.
How to install
mdr add jasonwarrenuk/goblin-mode/Role: API Designer@sha256:25bc79203e38d61cThe line at the top of this page pins the label git:20261008.c2dff9e, 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_zrmdgzr4hnddcuhr)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 6 versions of this file, between Aug 12, 2026 and Oct 8, 2026, about one every 11 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261008.c2dff9e latest | 2026-10-08 | c2dff9e | 8,009 B | A | view · diff |
| git:20260910.0097f1d | 2026-09-10 | 0097f1d | 7,935 B | A | view · diff |
| git:20260814.769885b | 2026-08-14 | 769885b | 7,936 B | A | view · diff |
| git:20260813.199d770 | 2026-08-13 | 199d770 | 7,977 B | A | view · diff |
| git:20260813.874484b | 2026-08-13 | 874484b | 7,867 B | A | view · diff |
| git:20260812.cb14bd6 | 2026-08-12 | cb14bd6 | 7,882 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 (8009 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
jasonwarrenuk/goblin-mode · 6 stars · license none declared · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_zrmdgzr4hnddcuhr GET https://markdownregistry.com/api/v1/resolve?ref=jasonwarrenuk/goblin-mode/Role: API Designer GET https://markdownregistry.com/api/v1/blob/25bc79203e38d61c2495e6766245727b90f75c501a2d521592ee529bd9f59db7
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.