The library

Every prompt, annotated

Real, published system prompts from shipping AI products — each with source attribution and notes on what makes it work.

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Cursor

agent prompt

Cursor — Agent Prompt v1.0 (Claude Sonnet 4)

An earlier, leaner Cursor agent prompt (Claude Sonnet 4) focused on tool-calling rules, aggressive parallel tool execution, search-and-reading bias to…

role definition tool-use protocol parallel tool-call maximization

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