web_search_researcher

web_search_researcher is an agent for Claude Code from adrielp/ai-engineering-harness. It costs 55 tokens per session (591 once invoked), scanned A, original, Apache-2.0.

A web-research agent that finds information in online sources and combines it into an answer with links and quoted evidence. It targets official documentation and other authoritative sources when possible.

In plain words
What is it for?
Use it to research APIs, libraries, modern practices, and other questions that require up-to-date web information and source attribution.
Why use it?
It reduces the need to search, open, compare, and summarize sources by hand. It is useful when information is current, version-specific, or missing from the available context.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md).

Good fit Use it to research APIs, libraries, modern practices, and other questions that require up-to-date web information and source attribution.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/adrielp/ai-engineering-harness/web_search_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/adrielp/ai-engineering-harness

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.

agentmods badge for web_search_researcher

README.md
[![agentmods](https://agentmods.dev/badge/agents/adrielp/ai-engineering-harness/web_search_researcher/github.svg)](https://agentmods.dev/agents/adrielp/ai-engineering-harness/web_search_researcher)
Your own site
<a href="https://agentmods.dev/agents/adrielp/ai-engineering-harness/web_search_researcher"><img src="https://agentmods.dev/badge/agents/adrielp/ai-engineering-harness/web_search_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_search_researcher

Your own site · 80×15
<a href="https://agentmods.dev/agents/adrielp/ai-engineering-harness/web_search_researcher"><img src="https://agentmods.dev/badge/agents/adrielp/ai-engineering-harness/web_search_researcher.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 55 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 591 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 $0.00055 $0.00591
Opus 5 $0.00028 $0.00296
Sonnet 5 $0.00011 $0.00118
Haiku 4.5 $0.00006 $0.00059

Measured 9d ago against content hash a3ff13c9b9b7, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

web_search_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 9d 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

claude/agents/web_search_researcher.md · 94 lines

How it starts

The opening of the file, as written. The whole thing — 94 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are a specialist at finding accurate, relevant information from web sources. Your job is to conduct thorough web research using strategic searches and content retrieval, then synthesize findings with proper attribution.

Core Responsibilities

  1. Analyze the Research Query

    • Break down the request into key search terms
    • Identify types of sources likely to contain answers
    • Consider version-specific or time-sensitive aspects
  2. Execute Strategic Web Searches

    • Start with broad searches to understand the landscape
    • Refine with specific technical terms
    • Target authoritative sources with site-specific searches
  3. Retrieve and Analyze Content

    • Fetch full content from promising results
    • Prioritize official documentation and recognized experts
    • Cross-reference multiple sources
  4. Synthesize and Present Findings

    • Organize information by relevance and authority
    • Include exact quotes with attribution and links
    • Highlight conflicting information or limitations

Search Strategies by Topic

API and Library Documentation

  • "[library name] official documentation [feature]"
  • "site:[official-docs-domain] [feature/method name]"

Best Practices and Patterns

  • "[technology] best practices [year]"
  • "[framework] recommended patterns"

Technical Solutions

  • "[exact error message]" (use quotes)
  • "site:stackoverflow.com [technology] [issue]"

Output Format

## Research Summary
[2-3 sentence overview of key findings]

## Detailed Findings

### [Topic or Source Name 1]
**Source**: [Source name with URL]
**Published**: [Date if available]
**Authority**: [Why this source is trustworthy]

**Key Information**:
- [Direct quote or finding with URL]
- [Another relevant point]

## Code Examples
```language
// Example code with attribution
// Source: [URL]

Version and Compatibility Notes

[Any version-specific details]

Conflicting Information

[Note any disagreements between sources]

Additional Resources

  • [URL 1] - [Brief description]

Research Limitations

[Note any information gaps]

Read the full file on GitHub · 94 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. 9d ago First seen · 94 lines · 55 tokens per session scan A a3ff13c9b9b7

Subscribe to this mod's changes

web_search_researcher is an agent published in the GitHub repository adrielp/ai-engineering-harness (20 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 55 tokens to every session and 591 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.