What is reader CLAUDE.md?

Repository instructions for Claude Code, an AI coding assistant, when working on the Jina AI Reader codebase. They describe the repository, its related documentation, and common build, run, and test commands.

Explaining the codebase structure, running its build and development commands, and following its testing and contribution workflow.

They give the assistant the project context and the exact commands and rules needed to work safely in the repository.

How jina-ai/reader configures Claude Code

About the project

Jina Reader is an open-source service that turns web pages and submitted documents into text formatted for large language models, and provides a separate endpoint for web search. It is used in AI agents and retrieval-augmented generation systems that need information from the web. The catalogue instruction helps agents use Reader as an input source.

jina-ai/reader · 12,238 stars · on GitHub · jina.ai

Reuse

Borrowing it

Nothing to install: this file belongs to jina-ai/reader. 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/jina-ai/reader/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/jina-ai/reader

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/jina-ai/reader/claude-md/github.svg)](https://agentmods.dev/instructions/jina-ai/reader/claude-md)

Your own site

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

Per session 2,542 This file is loaded in full into every session.

When invoked 2,542 The same file — it is already loaded in full.

Security scan A 1 finding. 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	$0.02542	$0.02542
Opus 5.5	$0.01017	$0.01017
Sonnet 5.5	$0.00508	$0.00508
Haiku 4.5	$0.00254	$0.00254

Measured 2mo ago against content hash fac7f3591702, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

reader CLAUDE.md scanned grade A with 1 finding 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

- Engines (URL→HTML): `puppeteer.ts` (browser), `curl.ts` (curl-impersonate), `cf-browser-rendering.ts`. `auto` is the default and is implemented in `crawler.ts`.

CLAUDE.md · 127 lines

How it starts

The opening of the file, as written. The whole thing — 127 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Repository identity

This is the oss branch of reader-saas, the codebase behind https://r.jina.ai (URL → markdown) and https://s.jina.ai (search → markdown). It is published to https://github.com/jina-ai/reader. The MongoDB-backed SaaS storage layer is not in this branch — only the stateless and bucket-cached storage modes ship here.

Companion docs in this repo:

architecture.md — engines, formatting profiles, abuse mitigation, deployment topology.
CONTRIBUTING.md — full env var table, dev workflow, test policy.
cookbooks.md — header recipes for common downstream pipelines (RAG, embedding, deep research, uploads, etc.).

Common commands

Build / run:

npm run build — runs integrity-check.cjs (requires licensed/GeoLite2-City.mmdb to exist) then tsc -p .. The integrity check is not optional — bare tsc will skip it.
npm run build:watch — incremental build for the F5 debug flow.
npm start — runs the compiled crawler entrypoint (build/stand-alone/crawl.js).
npm run dry-run — NODE_ENV=dry-run boots search.js, resolves the DI graph, then exits via finalizer.terminate(). Used in the Dockerfile to warm NODE_COMPILE_CACHE.

Local services (docker compose up -d):

minio on :9000 (API) / :9001 (console) — also aliased as minio.dev.jina.ai. Only needed when running with BucketStorageLayer.

VSCode F5 launches Debug Stand Alone Crawl (or Search / SERP), which runs Backend:prepare (docker compose + tsc watch) first. --env-file=.secret.local is loaded by Node directly — that file is gitignored and must be created locally.

Three independent stand-alone servers:

build/stand-alone/crawl.js — mounts CrawlerHost (the r.jina.ai surface).
build/stand-alone/search.js — mounts SearcherHost. At startup it deletes any registry entries tagged 'crawl', so search and crawl are mutually exclusive on a single process.
build/stand-alone/serp.js — SERP-only.

Read the full file on GitHub · 127 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 First seen · 127 lines · 2,542 tokens per session scan A fac7f3591702

Subscribe to this mod's changes

reader CLAUDE.md is an instructions file published in the GitHub repository jina-ai/reader (12,238 stars, last pushed 5mo ago), licensed Apache-2.0. It adds 2,542 tokens to every session, about $0.0102 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

LLM proxy

reader CLAUDE.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
reader CLAUDE.mdjina-ai/reader	Instructions file	12k	5mo ago	Apache-2.0	A	2,542	Claude Code
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	today	MIT	A	7,461	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	5,516	GitHub Copilot
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	today	MIT	A	4,680	Codex, OpenCode
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	274k	2d ago	MIT	A	4,313	Codex, OpenCode

reader: Instructions file for Claude Code