What is llvmkit AGENTS.md?

A set of coding-agent instructions for llvmkit, a project with a handle-based programming model and a reference C++ tree in origcpp/. It covers the repository guidelines, project status, and rules for writing new APIs.

Use it when working on llvmkit, especially when designing new APIs or consulting the origcpp/ reference tree.

It helps an agent understand the current state and compare against the reference implementation before adding API code.

How r3bb1t/llvmkit configures Codex and OpenCode

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/AGENTS.md

Clone the repo

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

Made for: Codex, OpenCode.

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

Your own site

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

Per session 32,255 This file is loaded in full into every session.

When invoked 32,255 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	$0.32255	$0.32255
Opus 5.5	$0.12902	$0.12902
Sonnet 5.5	$0.06451	$0.06451
Haiku 4.5	$0.03225	$0.03225

Measured 18d ago against content hash 81de1b184103, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

llvmkit AGENTS.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 18d 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.

AGENTS.md · 884 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.

18d ago Changed · +82 tokens per session 81de1b184103
24d ago Changed · +3 lines · +64 tokens per session d18418ff530c
26d ago Changed · +16 lines · +948 tokens per session bea50b6c53e9
1mo ago Changed · +8 lines · +437 tokens per session df669f1cc7b7
1mo ago Changed · +2 lines · +251 tokens per session 04708a4e4c60
1mo ago Changed · +7 lines · +192 tokens per session b6093d282543
1mo ago Changed · +38 lines · +1,243 tokens per session 44255be13b29
2mo ago First seen · 810 lines · 29,038 tokens per session scan A 79946d1dadde

Subscribe to this mod's changes

llvmkit AGENTS.md is an instructions file published in the GitHub repository r3bb1t/llvmkit (25 stars, last pushed 6d ago), with no licence file. It adds 32,255 tokens to every session, about $0.1290 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 AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
llvmkit AGENTS.mdr3bb1t/llvmkit	Instructions file	25	6d ago	none	A	32,255	Codex, OpenCode
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 Codex