What is rdrr CLAUDE.md?

Repository instructions for an AI coding assistant working on rdrr, a TypeScript library and command-line tool that turns web addresses into clean Markdown text. They describe its supported sources, folders, and common commands.

Use them when developing, testing, or navigating rdrr, including its web, YouTube, GitHub, PDF, and social-content extractors.

They give the assistant the project context needed to change the right part of the code. They also explain how different kinds of web content are detected and processed.

How fkonovalov/rdrr configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to fkonovalov/rdrr. 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/fkonovalov/rdrr/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/fkonovalov/rdrr

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/fkonovalov/rdrr/claude-md/github.svg)](https://agentmods.dev/instructions/fkonovalov/rdrr/claude-md)

Your own site

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

Per session 1,162 This file is loaded in full into every session.

When invoked 1,162 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 original 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	$0.01162	$0.01162
Opus 5.5	$0.00465	$0.00465
Sonnet 5.5	$0.00232	$0.00232
Haiku 4.5	$0.00116	$0.00116

Measured 2mo ago against content hash ca130d9c2f3b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

rdrr 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 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.

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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

rdrr AGENTS.md — 94% identical, 2 lines differ

CLAUDE.md · 122 lines

How it starts

The opening of the file, as written. The whole thing — 122 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

This file provides context for AI assistants working in this repository.

What is this project?

rdrr is a TypeScript library and CLI that converts any URL into clean markdown. 10x fewer tokens for AI agents.

Supports: webpages, YouTube transcripts, GitHub issues/PRs/discussions/files, Stack Overflow, npm packages, X/Twitter, llms.txt.

npm: rdrr
Homepage: https://rdrr.app

Project structure

Path	Role
`src/index.ts`	Library entry -- barrel exports
`src/cli.ts`	CLI entry (commander)
`src/rdrr.ts`	Orchestrator: `parse(url)` detects type, routes to provider
`src/detect.ts`	URL classification (YouTube, GitHub, npm, X, webpage)
`src/types.ts`	Public types
`src/shared.ts`	Shared utilities
`src/extract/`	Domain: HTML content extraction engine
`src/extract/sites/`	Site-specific extractors (reddit, twitter, etc.)
`src/extract/elements/`	Element processors (code, math, images, footnotes)
`src/extract/filters/`	Content filtering (hidden, scoring, patterns)
`src/extract/utils/`	DOM helpers
`src/provider/`	Domain: Content providers (web, youtube, github, stackoverflow, npm, x)

Common commands

pnpm build       # tsc --noEmit && tsdown
pnpm dev         # tsdown --watch
pnpm test        # vitest run
pnpm lint        # knip && oxlint ./src
pnpm fmt         # oxfmt --write .

Code conventions

TypeScript

Strict TypeScript. Avoid any -- use unknown and narrow.
noUncheckedIndexedAccess is enabled -- always handle undefined from index access.
verbatimModuleSyntax -- use import type for type-only imports.
Target: ES2022. Use modern syntax: Object.hasOwn(), Array.at(), structuredClone().

Read the full file on GitHub · 122 lines

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.

2mo ago Changed · +10 tokens per session ca130d9c2f3b
2mo ago First seen · 122 lines · 1,152 tokens per session scan A 123cbdf077e7

Subscribe to this mod's changes

rdrr CLAUDE.md is an instructions file published in the GitHub repository fkonovalov/rdrr (195 stars, last pushed 11d ago), licensed MIT. It adds 1,162 tokens to every session, about $0.0046 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.

LLM ai-agents cli markdown opensource web-scraping

rdrr CLAUDE.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
rdrr CLAUDE.mdfkonovalov/rdrr	Instructions file	195	11d ago	MIT	A	1,162	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

rdrr: Instructions file for Claude Code