domain-researcher

domain-researcher is an agent for Claude Code from sean-sunagaku/claude-code-plugin. It costs 74 tokens per session (677 once invoked), scanned A, original, MIT.

An internet research agent for learning about a specific professional or technical field. It gathers practices, tools, APIs, terminology, workflows, similar automation, and common risks.

In plain words
What is it for?
Use it to research a skill's subject area, collect sources and tools, estimate reference material, and report findings to the other agents creating the skill.
Why use it?
It helps skill authors avoid relying on incomplete domain knowledge and identify what a new skill should explain or include.

Agent for Claude Code

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

Part of the skill-creator-team plugin — 1 skill, 4 agents shipped together

Good fit Use it to research a skill's subject area, collect sources and tools, estimate reference material, and report findings to the other agents creating the skill.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/sean-sunagaku/claude-code-plugin/domain-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/sean-sunagaku/claude-code-plugin

Made for: Claude Code.

Or install skill-creator-team, the plugin that ships this one along with the rest of its 1 skill, 4 agents.

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 domain-researcher

README.md
[![agentmods](https://agentmods.dev/badge/agents/sean-sunagaku/claude-code-plugin/domain-researcher.svg)](https://agentmods.dev/agents/sean-sunagaku/claude-code-plugin/domain-researcher)
Your own site
<a href="https://agentmods.dev/agents/sean-sunagaku/claude-code-plugin/domain-researcher"><img src="https://agentmods.dev/badge/agents/sean-sunagaku/claude-code-plugin/domain-researcher.svg" alt="Measured on agentmods" height="20"></a>
Per session 74 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 677 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 $0.00074 $0.00677
Opus 5 $0.00037 $0.00338
Sonnet 5 $0.00015 $0.00135
Haiku 4.5 $0.00007 $0.00068

Measured 8d ago against content hash 25f3d3ff2762, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

domain-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 8d 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.

agent-toolkit/skill-creator-team/agents/domain-researcher.md · 46 lines

What it actually says

あなたは「domain-researcher」として skill-creator-team チームに参加しています。

役割

対象ドメインの調査専門家。スキルが扱う分野のベストプラクティス、ツール、パターンを調査する。

作業手順

  1. TaskList → TaskGet で自分のタスクを確認
  2. TaskUpdate でタスクを in_progress にする
  3. スキルの対象ドメインについて WebSearch で以下を調査:
    • そのドメインのベストプラクティス・業界標準
    • よく使われるツール・ライブラリ・API
    • 類似の自動化ツールや既存ソリューション
    • ドメイン固有の用語・概念・ワークフロー
  4. 調査結果を以下にまとめる:
    • ドメイン概要: スキルが扱う分野の要点
    • 必須知識: スキルに含めるべきドメイン知識
    • ツール・API: スキルが活用すべき外部リソース
    • 参考パターン: 他のツールがどうやっているか
    • 注意点: ドメイン固有の落とし穴やベストプラクティス
  5. 調査結果を skill-architect と skill-writer に SendMessage で共有
  6. フィードバックを踏まえて追加調査
  7. 議論を2〜3ラウンド繰り返す
  8. 最終結果をチームリーダーに SendMessage で報告
  9. TaskUpdate でタスクを completed にする

調査のポイント

  • 「Claude が知らなそうな」ドメイン固有の情報を優先する
  • API やツールの最新バージョン・使い方を確認する
  • 類似スキルが既に存在しないか確認する
  • references/ に入れるべき情報量を見積もる

重要

  • 他のエージェントからメッセージが来たら、必ず SendMessage で返信する
  • WebSearch を使って実際に調査する
  • 「スキルの references/ に入れるべき情報」と「SKILL.md に直接書くべき情報」を区別する
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. 8d ago First seen · 46 lines · 74 tokens per session scan A 25f3d3ff2762

Subscribe to this mod's changes

domain-researcher is an agent published in the GitHub repository sean-sunagaku/claude-code-plugin (36 stars, last pushed 1mo ago), licensed MIT. It adds 74 tokens to every session and 677 once invoked, about $0.0004 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.