What is VaCuus CLAUDE.md?

Project instructions for coding agents working on VaCuus, including its issue tracker, rules, and background information.

Following VaCuus conventions, using its Beads issue tracker, and choosing the right instructions for different agent tasks.

They give an agent the project context and working rules it needs before making changes.

How ufna/VaCuus configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to ufna/VaCuus. 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/ufna/VaCuus/master/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/ufna/VaCuus

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/ufna/vacuus/claude-md/github.svg)](https://agentmods.dev/instructions/ufna/vacuus/claude-md)

Your own site

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

Per session 3,349 This file is loaded in full into every session.

When invoked 3,349 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	$0.03349	$0.03349
Opus 5.5	$0.01340	$0.01340
Sonnet 5.5	$0.00670	$0.00670
Haiku 4.5	$0.00335	$0.00335

Measured 16d ago against content hash e9f450662d61, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

VaCuus 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 16d 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 · 199 lines

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.

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.

16d ago Changed · -4 tokens per session e9f450662d61
20d ago Changed · +12 lines · +363 tokens per session 4d3f25058e75
1mo ago Changed · +6 lines · +155 tokens per session 9fe3057205e4
2mo ago First seen · 181 lines · 2,835 tokens per session scan A f5d9838fd469

Subscribe to this mod's changes

VaCuus CLAUDE.md is an instructions file published in the GitHub repository ufna/VaCuus (42 stars, last pushed yesterday), with no licence file. It adds 3,349 tokens to every session, about $0.0134 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.

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VaCuus CLAUDE.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
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VaCuus: Instructions file for Claude Code