The library

Every prompt, annotated

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

3 prompts
Claude Code
tool schema

Claude Code — Tool Definitions (JSON Schema)

Machine-readable JSON array of Claude Code's 15 tool definitions, each with a descriptive prose blurb and an input_schema. Tools include Task (subagen…

tool-use protocol constraint setting few-shot
214 3.3k 5.2k words
Claude Code
agent prompt

Claude Code 2.0.0 — Full System Prompt & Tool Suite

The complete shipped system prompt for Claude Code v2.0.0 (Sonnet 4.5), bundled with its full tool catalog. It defines a terse CLI software-engineerin…

role definition tool-use protocol few-shot
159 278 8.6k words
Claude Code
agent prompt

Claude Code — Core System Prompt (Sonnet 4)

An earlier, leaner Claude Code system prompt (Sonnet 4, dated 2025-08-19) without the bundled tool schemas. It sets the terse CLI persona, prescribes …

role definition few-shot constraint setting
157 5.8k 2.6k words