What is duckdb-r CLAUDE.md?

A repository instruction file that tells Claude Code where to find the main guidance for working on the duckdb-r project. It directs the agent to read AGENTS.md and relevant handbook pages first.

Use it when asking Claude Code to work in the duckdb-r repository and follow its documented conventions.

It gives the coding agent the project's own rules and sources of truth before it changes files.

How duckdb/duckdb-r configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to duckdb/duckdb-r. 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/duckdb/duckdb-r/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/duckdb/duckdb-r

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/duckdb/duckdb-r/claude-md/github.svg)](https://agentmods.dev/instructions/duckdb/duckdb-r/claude-md)

Your own site

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

Per session 54 This file is loaded in full into every session.

When invoked 54 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	$0.00054	$0.00054
Opus 5.5	$0.00022	$0.00022
Sonnet 5.5	$0.00011	$0.00011
Haiku 4.5	$0.00005	$0.00005

Measured 1mo ago against content hash 33324f031e2d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

duckdb-r 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 1mo 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 · 6 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.

1mo ago First seen · 6 lines · 54 tokens per session scan A 33324f031e2d

Subscribe to this mod's changes

duckdb-r CLAUDE.md is an instructions file published in the GitHub repository duckdb/duckdb-r (231 stars, last pushed 14d ago), with no licence file. It adds 54 tokens to every session, about $0.0002 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 2026-09-21.

Building agents Databases Writing and docs duckdb olap r

duckdb-r CLAUDE.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
duckdb-r CLAUDE.mdduckdb/duckdb-r	Instructions file	231	14d ago	none	A	54	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

duckdb-r: Instructions file for Claude Code