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SDK and Client Library Designer

Design developer-friendly SDKs with stable interfaces, errors, retries, pagination, authentication, examples, and release rules.

Last updated Jul 11, 2026
FreeClaudeChatGPTCursor
TL;DR

SDK and Client Library Designer is a free AI skill for docs & knowledge bases. Design developer-friendly SDKs with stable interfaces, errors, retries, pagination, authentication, examples, and release rules. It works with Claude, ChatGPT, Cursor and is ready to use out of the box.

Download Skill.md Package

About this skill

SDK and Client Library Designer turns an API contract into a maintainable developer library. It defines package structure, configuration, authentication, resource clients, method signatures, pagination, errors, retries, idempotency, typing, testing, examples, documentation, versioning, and release processes.

What it does

The skill analyzes the API, target language, user workflows, conventions, and compatibility needs; designs the public client interface; separates transport and domain layers; defines resilience and error behavior; and produces a developer-ready implementation and documentation plan.

What is included

  • Public SDK interface
  • Package and module structure
  • Authentication and configuration
  • Resource and method design
  • Errors, retries, and pagination
  • Typing and compatibility rules
  • Testing and release strategy
  • Examples and documentation plan

How to use it

1. Download the sdk-and-client-library-designer-SKILL.md file
2. Upload it to your development workspace
3. Provide the API contract, target language, and developer workflows
4. Add compatibility, packaging, and release constraints
5. Use the design to implement and document the SDK

Examples

Example input
Design a TypeScript SDK for a REST API that supports file uploads, analysis jobs, pagination, API keys, retries, and webhook management.
Example output
A complete SDK design with client initialization, resource modules, typed methods, upload helpers, iterators, errors, retries, idempotency, testing, versioning, examples, and documentation.

FAQ

What is this skill for?
It designs public SDK and client-library interfaces from an API contract.
Can it support multiple languages?
Yes, but each language should have its own idiomatic design and compatibility rules.
Does it include retries?
Yes. It defines which errors are retryable, backoff, idempotency, and user control.
How does it handle pagination?
It can provide page objects, iterators, async iteration, or generators appropriate to the language.
Can it create examples and docs?
Yes. It defines quick starts, common workflows, error examples, and reference documentation.
How is this different from generated API code?
It focuses on developer experience, stable abstractions, idioms, resilience, documentation, and maintenance.

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