What is leaked-system-prompts CLAUDE.md?

A Claude Code instruction file for adding or updating prompt files in the leaked-system-prompts project. It defines file locations, naming, required front matter, and document content.

Use it when creating or editing leaked prompt files so they follow the repository's required structure.

It prevents prompt files from being placed or formatted incorrectly.

How YeeKal/leaked-system-prompts configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to YeeKal/leaked-system-prompts. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/YeeKal/leaked-system-prompts/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/YeeKal/leaked-system-prompts

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/yeekal/leaked-system-prompts/claude-md/github.svg)](https://agentmods.dev/instructions/yeekal/leaked-system-prompts/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/yeekal/leaked-system-prompts/claude-md"><img src="https://agentmods.dev/badge/instructions/yeekal/leaked-system-prompts/claude-md/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/yeekal/leaked-system-prompts/claude-md"><img src="https://agentmods.dev/badge/instructions/yeekal/leaked-system-prompts/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 1,579 This file is loaded in full into every session.

When invoked 1,579 The same file — it is already loaded in full.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin unknown No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.01579	$0.01579
Opus 5.5	$0.00632	$0.00632
Sonnet 5.5	$0.00316	$0.00316
Haiku 4.5	$0.00158	$0.00158

Measured 2mo ago against content hash 7518eb451129, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

leaked-system-prompts CLAUDE.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

CLAUDE.md · 108 lines

The source is not reproduced here

No licence file

Read it on GitHub

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

2mo ago First seen · 108 lines · 1,579 tokens per session scan A 7518eb451129

Subscribe to this mod's changes

leaked-system-prompts CLAUDE.md is an instructions file published in the GitHub repository YeeKal/leaked-system-prompts (192 stars, last pushed 6mo ago), with no licence file. It adds 1,579 tokens to every session, about $0.0063 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Building agents Writing and docs chatgpt-prompts claude-system-prompt cursor-system-prompt system-prompt system-prompts system-prompts-leak

leaked-system-prompts CLAUDE.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
leaked-system-prompts CLAUDE.mdYeeKal/leaked-system-prompts	Instructions file	192	6mo ago	none	A	1,579	Claude Code
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next.js AGENTS.mdvercel/next.js	Instructions file	143k	yesterday	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	yesterday	MIT	A	4,680	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	274k	2d ago	MIT	A	4,313	Codex, OpenCode

leaked-system-prompts: Instructions file for Claude Code