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.
curl -O https://raw.githubusercontent.com/fkonovalov/rdrr/main/AGENTS.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/agents-md)<a href="https://agentmods.dev/instructions/fkonovalov/rdrr/agents-md"><img src="https://agentmods.dev/badge/instructions/fkonovalov/rdrr/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.
<a href="https://agentmods.dev/instructions/fkonovalov/rdrr/agents-md"><img src="https://agentmods.dev/badge/instructions/fkonovalov/rdrr/agents-md.svg" alt="Reviewed on agentmods" width="80" 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 5.1 | $0.01161 | $0.01161 |
| Opus 5.5 | $0.00464 | $0.00464 |
| Sonnet 5.5 | $0.00232 | $0.00232 |
| Haiku 4.5 | $0.00116 | $0.00116 |
Grade A, and why
rdrr 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 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.
This is a copy
94% identical to rdrr CLAUDE.md — 2 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
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.
AGENTS.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.
- 2mo ago First seen · 122 lines · 1,161 tokens per session scan A 11f6ae9f214f
rdrr AGENTS.md is an instructions file published in the GitHub repository fkonovalov/rdrr (195 stars, last pushed 11d ago), licensed MIT. It adds 1,161 tokens to every session, about $0.0046 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 94% identical to rdrr CLAUDE.md, differing in 2 lines, and is treated as a copy.
rdrr AGENTS.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| rdrr AGENTS.mdfkonovalov/rdrr | Instructions file | 195 | 11d ago | MIT | A | 1,161 | 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 |