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Agent Skills are installable SKILL.md guides (plus optional references) for coding agents in Cursor, Claude Code, and similar clients. Cartesia’s official pack is cartesia-ai/skills. Not using skills? Copy the prompt from the AI agent guide into your editor rules instead.

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Install

npx skills add cartesia-ai/skills
When prompted, choose cartesia-api and/or line-voice-agent (you can add both). Before you start
  • API / app work: A Cartesia API key from play.cartesia.ai/keys.
  • Cartesia Line: Same Cartesia key plus an LLM provider key; the Line quickstart walks through setup and cartesia deploy.

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Which skill?

ChooseWhen
cartesia-apiYou call REST or WebSocket APIs (Sonic, Ink, voices), use the Python or JS/TS SDKs, or wire optional MCP in the IDE.
line-voice-agentYou build Cartesia Line agents: cartesia CLI, VoiceAgentApp, telephony, tools, and handoffs.
  • AI agent guide — canonical rules and copy-paste prompt (what the skills enforce).
  • MCP — optional IDE integration; not a replacement for REST/SDKs in shipped apps.
  • llms.txt — machine-readable docs index for agents.