What is web-researcher?

A web-research agent that gathers topic-related material from websites, tutorials, articles, and official documentation, then records findings with citations. Citations identify the source so readers can check the claim.

Use it to collect eight to fifteen relevant sources, extract claims and quotations, record publication dates and URLs, and save the research for later book writing and fact-checking.

It removes the need to manually search many sources and organize their key points. It also helps prioritize official and up-to-date material for technology topics that change quickly.

How tobyilee/book-writer configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to tobyilee/book-writer. 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/tobyilee/book-writer/main/.claude/agents/web-researcher.md

Clone the repo

git clone --depth 1 https://github.com/tobyilee/book-writer

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/agents/tobyilee/book-writer/web-researcher/github.svg)](https://agentmods.dev/agents/tobyilee/book-writer/web-researcher)

Your own site

<a href="https://agentmods.dev/agents/tobyilee/book-writer/web-researcher"><img src="https://agentmods.dev/badge/agents/tobyilee/book-writer/web-researcher/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/agents/tobyilee/book-writer/web-researcher"><img src="https://agentmods.dev/badge/agents/tobyilee/book-writer/web-researcher.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 44 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 413 The whole file, excluding the scripts and references it only reads on demand.

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	$0.00044	$0.00413
Opus 5.5	$0.00018	$0.00165
Sonnet 5.5	$0.00009	$0.00083
Haiku 4.5	$0.00004	$0.00041

Measured 1mo ago against content hash f09cef2b3f94, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

web-researcher 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/agents/web-researcher.md · 26 lines

What it actually says

Web Researcher

일반 웹(공식 문서·블로그·기사·튜토리얼)에서 주제 자료를 모아 {slug}/research/web.md에 쓴다. 논문과 커뮤니티 토론은 다른 리서처가 맡는다. 소스 우선순위·수집 가이드·출력 형식은 web-research 스킬을 따른다.

입력

주제·주요 내용·대상 독자, genre, 슬러그.

이 역할에서 중요한 것

이 파일은 나중에 fact-checker가 본문 사실을 대조하는 원장이 된다. 인용은 요약하지 말고 원문 그대로, 출처(URL·저자·발행일)와 함께 남긴다.
tech-book에서 버전·API·수치는 공식 1차 소스(릴리스 노트·체인지로그·공식 문서·RFC)를 우선한다. 각 자료에 발행일을 적고 버전 정보는 "{버전}/{연도} 기준"으로 못 박는다. 빠르게 변하는 주제의 오래된 자료에는 "구버전 정보일 수 있음"을 붙인다.
대상 독자가 한국 독자면 한국어 자료 비중을 높인다.

재실행

보강 요청: 기존 항목을 유지하고 새 자료를 append하며, 상단에 를 남긴다.
전체 재실행: web_v1.md로 백업한 뒤 새로 쓴다.

반환값: 파일 경로, 수집 건수, 수집 한계 한 줄.

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 Changed · -48 lines · +13 tokens per session f09cef2b3f94
2mo ago First seen · 74 lines · 31 tokens per session scan A 836cbf9d8a77

Subscribe to this mod's changes

web-researcher is an agent published in the GitHub repository tobyilee/book-writer (85 stars, last pushed 3d ago), licensed MIT. It adds 44 tokens to every session and 413 once invoked, 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 2026-08-30.

Research

web-researcher next to 6 agents from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
web-researchertobyilee/book-writer	Agent	85	3d ago	MIT	A	44	Claude Code
playwright-test-generatormicrosoft/playwright	Agent	99k	yesterday	Apache-2.0	A	151	Claude Code
.NET-Notebook-Migration-Agentmicrosoft/ai-agents-for-beginners	Agent	79k	4d ago	MIT	A	33	Claude Code
code-revieweranthropics/claude-cookbooks	Agent	54k	2d ago	MIT	A	52	Claude Code
AVM Owner Triagegithub/awesome-copilot	Agent	41k	yesterday	MIT	A	61	Claude Code
Ultimate Transparent Thinking Beast Modegithub/awesome-copilot	Agent	41k	yesterday	MIT	A	11	Claude Code
WinForms Expertgithub/awesome-copilot	Agent	41k	yesterday	MIT	A	19	Claude Code

book-writer: Agent for Claude Code