The library

Every prompt, annotated

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

2 prompts Sort

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

Amp

agent prompt

Amp — Coding Agent (Claude Sonnet 4.x)

Sourcegraph Amp's full system prompt tuned for Claude Sonnet 4.x, captured as the raw API message YAML. Defines an autonomous software-engineering age…

role definition tool-use protocol agency mandate

119 7.6k 7.9k words