claude-api

Installation
SKILL.md

Claude API

Build applications with the Anthropic Claude API and SDKs.

When to Activate

  • Building applications that call the Claude API
  • Code imports anthropic (Python) or @anthropic-ai/sdk (TypeScript)
  • User asks about Claude API patterns, tool use, streaming, or vision
  • Implementing agent workflows with Claude Agent SDK
  • Optimizing API costs, token usage, or latency

Model Selection

Model ID Best For
Opus 4.1 claude-opus-4-1 Complex reasoning, architecture, research
Sonnet 4 claude-sonnet-4-0 Balanced coding, most development tasks
Haiku 3.5 claude-3-5-haiku-latest Fast responses, high-volume, cost-sensitive
Related skills
Installs
2.4K
GitHub Stars
179.7K
First Seen
Mar 13, 2026