by asgeirtj
Documented system prompts from Anthropic - Claude Fable 5.1, Opus 5.5, Claude Design, Claude Code. OpenAI - ChatGPT GPT-6-Astra, Codex. Google - Gemini 3.8 Flash, 3.1 Pro, Antigravity. xAI - Grok, Grok Bot, Cursor, Kimi and more! Updated regularly.
# Add to your Claude Code skills
git clone https://github.com/asgeirtj/system_prompts_leaksGuides for using ai agents skills like system_prompts_leaks.
Last scanned: 4/15/2026
{
"issues": [],
"status": "PASSED",
"scannedAt": "2026-04-15T06:03:11.321Z",
"semgrepRan": false,
"npmAuditRan": true,
"pipAuditRan": true
}See how system_prompts_leaks compares with popular alternatives.
system_prompts_leaks is an open-source ai agents skill for AI coding assistants such as Claude Code, Codex CLI, and ChatGPT, built by asgeirtj. Documented system prompts from Anthropic - Claude Fable 5.1, Opus 5.5, Claude Design, Claude Code. OpenAI - ChatGPT GPT-6-Astra, Codex. Google - Gemini 3.8 Flash, 3.1 Pro, Antigravity. xAI - Grok, Grok Bot, Cursor, Kimi and more! Updated regularly. It has 68,505 GitHub stars.
Yes. system_prompts_leaks passed SkillsLLM's automated security scan — a dependency vulnerability audit plus prompt-injection heuristics — with no high-severity issues. You can read the full report in the Security Report section on this page.
Clone the repository with "git clone https://github.com/asgeirtj/system_prompts_leaks" and add it to your Claude Code skills directory (see the Installation section above).
system_prompts_leaks is primarily written in JavaScript. It is open-source under asgeirtj on GitHub, so you can review or fork the full source.
Yes. SkillsLLM lists many other AI Agents skills you can browse and compare side by side. Open the AI Agents category from the badge at the top of this page, or use the Related Skills and comparison links further down to weigh system_prompts_leaks against similar tools.
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⚠️ Third-Party Software Notice
This skill is third-party open-source software developed and hosted independently on GitHub. SkillsLLM is an informational directory and does not control or maintain the underlying repository.
Any security checks, ratings, or warnings displayed by SkillsLLM are automated and limited in scope. They do not constitute a security certification or guarantee that the software is safe, error-free, or free from malicious code, vulnerabilities, compromised dependencies, or prompt-injection risks.
Review the source code, permissions, dependencies, and configuration before installing or running any third-party skill. Use is at your own risk. To the maximum extent permitted by applicable law, SkillsLLM is not liable for losses arising from third-party software.
See comparison
Understand your agents in production
The Washington Post built its interactive story on prompts from this repo: See the hidden rules behind AI. Then use them to rewrite this article. (May 11, 2026)
CEPS' AI World built a live data dashboard from this repo's files: System prompts and what they tell us about the chat before the chat (July 10, 2026)
The full verbatim system prompts behind the most popular chatbots in the world. Carefully curated and complete. Feel free to open up a PR or get in contact if you got a different result.
| What | Date | Link |
|---|---|---|
| GPT-6-Sol Codex | September 27, 2026 | GPT-6-Sol Codex system prompt |
| GPT-6-Luna Codex | September 27, 2026 | GPT-6-Luna Codex system prompt |
| Fable 5.1 Claude Code Desktop | September 27, 2026 | Claude Code desktop app system prompt (Fable 5.1) |
| Claude Opus 5.5 | September 22, 2026 | Claude Opus 5.5 system prompt |
| Opus 5.5 Claude Code | September 22, 2026 | Claude Code system prompt (Opus 5.5) |
| Grok 4.7 | September 21, 2026 | Grok 4.7 system prompt (Grok CLI) |
| Claude Projects | September 21, 2026 | Claude Projects - Thread Claude system prompt |
| Claude Code Advisor tool | September 15, 2026 | Advisor tool prompts (both sides) |
| ChatGPT Work Codex (local) | September 13, 2026 | ChatGPT Work Codex local system prompt |
| Gemini 3.8 Flash | September 13, 2026 | Gemini 3.8 Flash system prompt |
| Fable 5.1 Claude Code headless | September 5, 2026 | Claude Code headless system prompt (Fable 5.1) |
| GPT-6-Astra Codex | September 4, 2026 | Codex GPT-6-Astra system prompt |
| Claude Fable 5.1 | September 1, 2026 | Claude Fable 5.1 system prompt · Claude Code (Fable 5.1) |
| Grok 4.6 | August 29, 2026 | Grok 4.6 system prompt |
| Grok Bot | August 21, 2026 | Grok Bot system prompt |
| Gemini 3.7 Flash | August 18, 2026 | Gemini 3.7 Flash system prompt |
| Muse Code (Meta's coding CLI) | August 17, 2026 | Muse Code system prompt |
| Claude Cowork (new capture + setup skills) | August 17, 2026 | Claude Cowork system prompt · setup skills |
| Claude Science | August 14, 2026 | Claude Science system prompt |
| GPT-5.6 Codex | July 26, 2026 | Codex GPT-5.6 system prompt |
| Grok 4.5 | July 26, 2026 | Grok 4.5 system prompt |
| Claude Opus 5 | July 24, 2026 | Claude Opus 5 system prompt · Claude Code (Opus 5) |
| Claude Design (full prompt + 53 tools + 22 skills + 10 starter components) | July 23, 2026 | Claude Design system prompt · skills · starter components |
| Perplexity | July 17, 2026 | Perplexity AI system prompt |
| Claude Code (new models) | July 16, 2026 | Claude Code system prompt (Fable 5) · Sonnet 5 |
| OpenCode · Pi · CommandCode | July 16, 2026 | OpenCode system prompt · Pi system prompt · CommandCode CLI system prompt |
| Model | Prompt |
|---|---|
| Claude Opus 5.5 | Claude Opus 5.5 system prompt |
| Claude Fable 5.1 | Claude Fable 5.1 system prompt |
| Claude Opus 5 | Claude Opus 5 system prompt |
| Claude Fable 5 | Claude Fable 5 system prompt |
| Claude Opus 4.8 | Claude Opus 4.8 system prompt |
| Claude Sonnet 5 | Claude Sonnet 5 system prompt |
| Claude Opus 4.7 | Claude Opus 4.7 system prompt |
| Claude Opus 4.6 | Claude Opus 4.6 system prompt · No tools |
| Claude Sonnet 4.6 | Claude Sonnet 4.6 system prompt · No tools |
| Injected reminders | Claude.ai injected reminders |
| Component | Prompt |
|---|---|
| Opus 5.5 Claude Code | Claude Code system prompt (Opus 5.5) |
| Fable 5.1 Claude Code | Claude Code system prompt (Fable 5.1) |
| Fable 5.1 Claude Code Desktop | Claude Code desktop app system prompt (Fable 5.1) · Fable 5 |
| Fable 5.1 Claude Code headless | Claude Code headless system prompt (Fable 5.1) |
| Opus 5 Claude Code | Claude Code system prompt (Opus 5) |
| Fable 5 Claude Code | Claude Code system prompt (Fable 5) |
| Opus 4.8 Claude Code | Claude Code system prompt (Opus 4.8) |
| Sonnet 5 Claude Code | Claude Code system prompt (Sonnet 5) |
| Claude Code (older models) | Opus 4.7 · Opus 4.6 · Sonnet 4.6 · Haiku 4.5 |
| Subagents | Claude Code subagent system prompts |
| Advisor tool | Advisor tool prompts (both sides) |
| Skills & commands | Claude Code skills · Slash commands |
| Docs assistant | docs.claude.com assistant instructions |
| Product | Prompt |
|---|---|
| Claude Projects | Claude Projects - Thread Claude system prompt |
| Claude Design | Claude Design system prompt · skills · starter components |
| Claude Cowork | Claude Cowork system prompt · Dispatch · setup skills |
| Claude Science | Claude Science system prompt |
| Claude for Microsoft 365 | Claude for Excel · Claude for Word · Claude in PowerPoint |
| Claude in Chrome | Claude in Chrome extension system prompt |
| Claude iOS app | Claude mobile iOS system prompt |
| Model | Prompt |
|---|---|
| ChatGPT 5.6 Sol | ChatGPT 5.6 system prompt (Sol, extra high) |
| ChatGPT 5.5 Thinking | ChatGPT 5.5 Thinking system prompt |
| ChatGPT 5.5 Instant | ChatGPT 5.5 Instant system prompt |
| ChatGPT 5.4 | ChatGPT 5.4 Thinking system prompt |
| ChatGPT 5.3 | ChatGPT 5.3 Instant system prompt |
| ChatGPT 5.2 | ChatGPT 5.2 Thinking system prompt |
| ChatGPT 5 | ChatGPT 5 Thinking system prompt · Agent mode |
| ChatGPT Atlas | ChatGPT Atlas system prompt |
| ChatGPT 4.5 | ChatGPT 4.5 system prompt |
| ChatGPT 4o | [ChatGPT 4o system |