Real, published system prompts from shipping AI products — each with source attribution and notes on what makes it work.
A long, dated (2025-08-20) Codex CLI system prompt with rich behavioral sections: personality/tone, preamble messages before tool calls, an update_pla…
A compact utility prompt that generates a short title summarizing a chat conversation. Constrains output to ~8 words or fewer, unquoted, impersonal, a…
A compact Codex CLI developer message framing the model as a terminal-based agentic coding assistant in a sandboxed, git-backed workspace. It sets a k…
The system prompt for Xcode's in-editor coding assistant, specializing in analyzing an open Apple project. It enforces an Apple-first stance (Swift, S…
The Cline VSCode coding-agent prompt built around an XML tool-call protocol with a strict one-tool-per-message, wait-for-confirmation loop. It documen…
System prompt for Trae AI's chat mode, an agentic IDE coding assistant operating on the 'AI Flow' paradigm. Structured with XML sections (identity, pu…
JSON tool-schema definitions for Trae's agentic Builder mode, covering 18 tools spanning task tracking, codebase retrieval, file editing, command exec…
Full agent system prompt for GitHub Copilot in VS Code, combining an identity/instructions block with an embedded JSON array of ~20 tool definitions a…