# deep-research

> Claude/Codex skill by [@firecrawl](https://omgskills.com/library/firecrawl/index.md) · 1.2k stars · Updated 2026-04-19

Multi-source research with source triangulation and fact-checking. Use for any research task requiring 3+ sources.

## Install

```sh
git clone https://github.com/firecrawl/web-agent /tmp/web-agent && ln -s /tmp/web-agent/agent-core/src/skills/definitions/deep-research ~/.claude/skills/deep-research
```

## From README

Deep Research Search Strategy Break the topic into 3-5 distinct angles 2-3 queries per angle using different terminology Use site: operator for targeted searches (e.g. site:arxiv.org, site:github.com) Include official, comparison, and review-oriented queries Aim for 5-10 unique, high-quality sources Extraction Scrape each source with a targeted query parameter -- don't dump full pages into context Extract: key claims, data points, dates, attributed quotes Record author, publication, date, and URL for every source Fact-Checking Cross-reference claims across 2+ sources Flag single-source claims explicitly Assign confidence: high (3+ sources agree), medium (2), low (1 or conflicting) Include contrarian viewpoints -- don't confirmation-bias the results Output Structure by subtopic, not by source Inline citations for every claim Call formatOutput with the structured data

## Links

- HTML page: https://omgskills.com/skills/firecrawl/firecrawl-agent/deep-research/
- GitHub: https://github.com/firecrawl/web-agent
- Author: [@firecrawl](https://omgskills.com/library/firecrawl/index.md)

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