claude-code-system-prompts/system-prompts/skill-build-claude-api-and-sdk-apps.md

Build Claude API / Anthropic SDK apps. TRIGGER when: code imports anthropic/@anthropic-ai/sdk; user asks to use the Claude API, Anthropic SDKs, or Managed Agents (/v1/agents, /v1/sessions); or asks to add a Claude feature (prompt caching, adaptive thinking, compaction, code_execution, batch, files API, citations, memory tool) or a Claude model (Opus/Sonnet/Haiku) to a Claude file. DO NOT TRIGGER when: file imports openai/non-Anthropic SDK, filename signals another provider (agent-openai.py, *-generic.py), code is provider-neutral, or task is general programming/ML.