Borrowing it
Nothing to install: this file belongs to ankitvgupta/exo. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/ankitvgupta/exo/main/CLAUDE.mdgit clone --depth 1 https://github.com/ankitvgupta/exoWrote 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.
[](https://agentmods.dev/instructions/ankitvgupta/exo/claude-md)<a href="https://agentmods.dev/instructions/ankitvgupta/exo/claude-md"><img src="https://agentmods.dev/badge/instructions/ankitvgupta/exo/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.
<a href="https://agentmods.dev/instructions/ankitvgupta/exo/claude-md"><img src="https://agentmods.dev/badge/instructions/ankitvgupta/exo/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.07393 | $0.07393 |
| Opus 5.5 | $0.02957 | $0.02957 |
| Sonnet 5.5 | $0.01479 | $0.01479 |
| Haiku 4.5 | $0.00739 | $0.00739 |
Grade B, and why
exo CLAUDE.md scanned grade B with 1 finding 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.
Subtle steeringmediumPrompt injection
Instructions that bias recommendations or shape behaviour without the user noticing.
- Run pre-pr in the foreground (or background with `run_in_background`) yourself — never tell the user "you should run pre-pr now." That is a delegation failure; the agent owns this step. The source is not reproduced here
A licence we could not identify
The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.
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 · 384 lines · 7,393 tokens per session scan B c1d748d04063
exo CLAUDE.md is an instructions file published in the GitHub repository ankitvgupta/exo (495 stars, last pushed 1mo ago), with no licence file. It adds 7,393 tokens to every session, about $0.0296 per session on Opus 5.5. A static security scan graded it B with 1 finding (subtle steering). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
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AGENTS.md instructions for deepseek-ai/deepseek-harness, covering agents.md, pre-stable apis and released session data, repository layout, commands and host sandbox failures.