What is llvmkit CLAUDE.md?

A set of Claude Code instructions for llvmkit, a software project with a handle-based programming model. It covers the project structure, available commands, architecture, and rules for writing an API.

Use it when exploring llvmkit or designing and implementing new APIs with its handle model.

It explains the project's model and conventions before code is added, helping prevent APIs that do not fit its architecture.

How r3bb1t/llvmkit configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to r3bb1t/llvmkit. 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/r3bb1t/llvmkit/master/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/r3bb1t/llvmkit

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/r3bb1t/llvmkit/claude-md/github.svg)](https://agentmods.dev/instructions/r3bb1t/llvmkit/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/r3bb1t/llvmkit/claude-md"><img src="https://agentmods.dev/badge/instructions/r3bb1t/llvmkit/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/r3bb1t/llvmkit/claude-md"><img src="https://agentmods.dev/badge/instructions/r3bb1t/llvmkit/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 5,514 This file is loaded in full into every session.

When invoked 5,514 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	$0.05514	$0.05514
Opus 5.5	$0.02206	$0.02206
Sonnet 5.5	$0.01103	$0.01103
Haiku 4.5	$0.00551	$0.00551

Measured 24d ago against content hash 4f315f7cd13a, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

llvmkit 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 24d 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 · 141 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.

24d ago Changed · +60 tokens per session 4f315f7cd13a
26d ago Changed · +2 lines · +260 tokens per session 3695f78bb61a
1mo ago Changed · +229 tokens per session 9053428f1afa
1mo ago Changed · +2 lines · +247 tokens per session e5b3c81a6417
1mo ago Changed · +234 tokens per session a559cf9a9b27
1mo ago Changed · +3 lines · +420 tokens per session dc3a2bcf2bcd
2mo ago First seen · 134 lines · 4,064 tokens per session scan A 7194192c2118

Subscribe to this mod's changes

llvmkit CLAUDE.md is an instructions file published in the GitHub repository r3bb1t/llvmkit (25 stars, last pushed 6d ago), with no licence file. It adds 5,514 tokens to every session, about $0.0221 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.

llvm llvm-ir llvm-pass

llvmkit CLAUDE.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
llvmkit CLAUDE.mdr3bb1t/llvmkit	Instructions file	25	6d ago	none	A	5,514	Claude Code
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	9,719	GitHub Copilot
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

llvmkit: Instructions file for Claude Code