Web Research

by langchain-ai6a3a12bc5b3aNo license30K starsListed Oct 8, 2026Updated Oct 8, 2026Repository updated today

Searches multiple web sources, synthesizes findings, and produces cited research reports using delegated subagents. Use when the user asks to research a topic online, search the web, look something up, find current information, compare options, or produce a research report.

Instructions onlyResearch & Analysis
AI-generated overview

Plans, delegates and synthesizes multi-source web research into a cited report.

What it does
Breaks a research question into non-overlapping subtopics, writes a research plan file, and delegates each subtopic to a subagent that runs a limited number of web searches and saves findings to local markdown files. It then reads those findings files, synthesizes the results, and produces a response or report that answers the original question with cited source URLs and noted gaps.
When to use it
Use when the user asks to research a topic online, search the web, look something up, find current information, compare options, or produce a research report. It suits simple fact-finding, comparative analysis and more complex multi-subtopic investigations.
Requirements
No scripts ship with the skill; it is instructions only. It relies on agent tools for web search, URL fetching, task delegation to subagents, and local file read/write/list operations, plus network access for web sources.

Web Research Skill

Research Process

Step 1: Create and Save Research Plan

Before delegating to subagents, you MUST:

  1. Create a research folder - Organize all research files in a dedicated folder relative to the current working directory:

    mkdir research_[topic_name]

    This keeps files organized and prevents clutter in the working directory.

  2. Analyze the research question - Break it down into distinct, non-overlapping subtopics

  3. Write a research plan file - Use the write_file tool to create research_[topic_name]/research_plan.md containing:

    • The main research question
    • 2-5 specific subtopics to investigate
    • Expected information from each subtopic
    • How results will be synthesized

Planning Guidelines:

  • Simple fact-finding: 1-2 subtopics
  • Comparative analysis: 1 subtopic per comparison element (max 3)
  • Complex investigations: 3-5 subtopics

Step 2: Delegate to Research Subagents

For each subtopic in your plan:

  1. Use the task tool to spawn a research subagent with:

    • Clear, specific research question (no acronyms)
    • Instructions to write findings to a file: research_[topic_name]/findings_[subtopic].md
    • Budget: 3-5 web searches maximum
  2. Run up to 3 subagents in parallel for efficient research

Subagent Instructions Template:

Research [SPECIFIC TOPIC]. Use the web_search tool to gather information.After completing your research, use write_file to save your findings to research_[topic_name]/findings_[subtopic].md.Include key facts, relevant quotes, and source URLs.Use 3-5 web searches maximum.

Step 3: Synthesize Findings

After all subagents complete:

  1. Review the findings files that were saved locally:

    • First run list_files research_[topic_name] to see what files were created
    • Then use read_file with the file paths (e.g., research_[topic_name]/findings_*.md)
    • Important: Use read_file for LOCAL files only, not URLs
  2. Synthesize the information - Create a comprehensive response that:

    • Directly answers the original question
    • Integrates insights from all subtopics
    • Cites specific sources with URLs (from the findings files)
    • Identifies any gaps or limitations
  3. Write final report (optional) - Use write_file to create research_[topic_name]/research_report.md if requested

Note: If you need to fetch additional information from URLs, use the fetch_url tool, not read_file.

Best Practices

  • Plan before delegating - Always write research_plan.md first
  • Clear subtopics - Ensure each subagent has distinct, non-overlapping scope
  • File-based communication - Have subagents save findings to files, not return them directly
  • Systematic synthesis - Read all findings files before creating final response
  • Stop appropriately - Don't over-research; 3-5 searches per subtopic is usually sufficient

Source and attribution

Source:langchain-ai/deepagentsinlibs/code/examples/skills/web-researchat commit6a3a12b

License: No license

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Web Research Agent Skill | SourceWeft