Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add instructions/fkonovalov/rdrr/claude-mdgit clone --depth 1 https://github.com/fkonovalov/rdrrWrote 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.
[](https://agentmods.dev/instructions/fkonovalov/rdrr/claude-md)<a href="https://agentmods.dev/instructions/fkonovalov/rdrr/claude-md"><img src="https://agentmods.dev/badge/instructions/fkonovalov/rdrr/claude-md.svg" alt="Measured on agentmods" height="20"></a>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 | $0.01162 | $0.01162 |
| Opus 5 | $0.00581 | $0.00581 |
| Sonnet 5 | $0.00232 | $0.00232 |
| Haiku 4.5 | $0.00116 | $0.00116 |
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 today.
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.
Copies of this mod
1 near-identical copy found in the catalogue:
- rdrr AGENTS.md — 94% identical, 2 lines differ
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-- useunknownand narrow. noUncheckedIndexedAccessis enabled -- always handleundefinedfrom index access.verbatimModuleSyntax-- useimport typefor type-only imports.- Target: ES2022. Use modern syntax:
Object.hasOwn(),Array.at(),structuredClone().
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.
- today Changed · +10 tokens per session ca130d9c2f3b
- 5d ago First seen · 122 lines · 1,152 tokens per session scan A 123cbdf077e7
rdrr CLAUDE.md is an instructions file published in the GitHub repository fkonovalov/rdrr (174 stars, last pushed 3d ago), licensed MIT. It adds 1,162 tokens to every session, about $0.0058 per session on Opus 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.
Other instructions, from other repositories
webdown CLAUDE.md
Claude Code instructions for kelp/webdown, covering webdown development guide, working with claude, version management (semantic versioning), modern python development setup (python 3.10+) and build & testing commands.
firecrawl AGENTS.md
AGENTS.md instructions for firecrawl/firecrawl: Firecrawl is a web scraper API. The directory you have access to is a monorepo.
firecrawl CLAUDE.md
Claude Code instructions for firecrawl/firecrawl: Firecrawl is a web scraper API. The directory you have access to is a monorepo.
crit AGENTS.md
AGENTS.md instructions for tomasz-tomczyk/crit, covering crit — development guide, project map, key architecture decisions, running and projects.
llm-wiki-compiler AGENTS.md
AGENTS.md instructions for atomicstrata/llm-wiki-compiler, covering llmwiki, development guidelines, code style & standards, clean code rules and comments and documentation.
webclaw CLAUDE.md
Claude Code instructions for 0xMassi/webclaw, covering webclaw, architecture, core modules (webclaw-core), fetch modules (webclaw-fetch) and llm modules (webclaw-llm).