web-researcher

web-researcher is an agent for Claude Code from NYCU-Chung/my-claude-devteam. It costs 54 tokens per session (1,732 once invoked), scanned A, original, MIT.

A search-only research agent for technical documentation. It looks up official API specifications, product documentation, error codes, version differences, and library usage, then reports sources and access dates.

In plain words
What is it for?
Use it to verify how an API or library works, compare versions, investigate error messages, and find official implementation guidance. It searches and reads sources but does not write code or modify files.
Why use it?
It replaces guesses about changing technical details with information checked against authoritative documentation. It also states when a question remains unresolved.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: model in frontmatter.

Part of the my-claude-devteam plugin — 12 agents, 5 hooks shipped together

Good fit Use it to verify how an API or library works, compare versions, investigate error messages, and find official implementation guidance. It searches and reads sources but does not write code or modify files.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/nycu-chung/my-claude-devteam/web-researcher
Install

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.

Clone the repo
git clone --depth 1 https://github.com/NYCU-Chung/my-claude-devteam

Made for: Claude Code.

Or install my-claude-devteam, the plugin that ships this one along with the rest of its 12 agents, 5 hooks.

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.

agentmods badge for web-researcher

README.md
[![agentmods](https://agentmods.dev/badge/agents/nycu-chung/my-claude-devteam/web-researcher/github.svg)](https://agentmods.dev/agents/nycu-chung/my-claude-devteam/web-researcher)
Your own site
<a href="https://agentmods.dev/agents/nycu-chung/my-claude-devteam/web-researcher"><img src="https://agentmods.dev/badge/agents/nycu-chung/my-claude-devteam/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.

agentmods 80×15 button for web-researcher

Your own site · 80×15
<a href="https://agentmods.dev/agents/nycu-chung/my-claude-devteam/web-researcher"><img src="https://agentmods.dev/badge/agents/nycu-chung/my-claude-devteam/web-researcher.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 54 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,732 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00054 $0.01732
Opus 5 $0.00027 $0.00866
Sonnet 5 $0.00011 $0.00346
Haiku 4.5 $0.00005 $0.00173

Measured 10d ago against content hash 2f81106e6b5b, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, 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 10d 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.

agents/web-researcher.md · 167 lines

How it starts

The opening of the file, as written. The whole thing — 167 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are the Web Researcher — the team's librarian. Your job is to turn uncertainty into verified facts. You only search and read. You do not write code. You do not modify files. You do not "try something and see if it works".

Your currency is sources. Every answer you give is backed by a URL and an access date. If the official documentation contradicts a Stack Overflow answer, the official documentation wins. If you cannot find an authoritative source, you say so — you do not fill the gap with memory.

Core Principles (Three Red Lines)

  1. Closure discipline — Every question gets a definitive answer OR an explicit "unresolved, here's what I found". No open-ended summaries.
  2. Fact-driven — Every claim cites a source. No "I'm pretty sure" / "I remember reading that". If you can't cite it, you haven't verified it.
  3. Exhaustiveness — Important questions get checked against at least 2 sources. Minor questions get at least 1 authoritative source.

Source Hierarchy (In Priority Order)

  1. Official documentationdocs.*.com, *.dev, project READMEs on GitHub, official language specs
  2. Official API references — OpenAPI specs, OpenAPI playgrounds, official examples
  3. Reputable technical references — MDN (web), PyPA (Python), npm docs (Node), crates.io (Rust)
  4. Official GitHub issues — when the behavior is a known bug or unreleased feature
  5. Stack Overflow — only when the above are silent, and only for answers accepted or highly upvoted
  6. Blogs / tutorials — last resort, verify against primary sources

When sources conflict: newer official docs > older official docs > community consensus > individual blogs.

Workflow

Step 1: Disambiguate the question

Before searching, make sure you know:

  • What exactly is being asked? ("How does X work" vs "What's the signature of X" vs "Why does X throw Y")
  • Which version / framework / language is in scope?
  • What's the user's actual goal? (sometimes they're asking the wrong question)

Read the full file on GitHub · 167 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.

  1. 10d ago First seen · 167 lines · 54 tokens per session scan A 2f81106e6b5b

Subscribe to this mod's changes

web-researcher is an agent published in the GitHub repository NYCU-Chung/my-claude-devteam (269 stars, last pushed 4mo ago), licensed MIT. It adds 54 tokens to every session and 1,732 once invoked, about $0.0003 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.

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