deep-researchlisted
Install: claude install-skill Fusion-Data-Company/underwriter-os
# Deep Research
Turn a plain-language question into a thorough, source-cited briefing. This is the research engine the other plays lean on.
## When to use
The user wants more than a quick answer: "research the Nashville multifamily market," "what's happening with construction costs," "look into this developer," "find everything on this incentive program."
## Tools, in order of preference
1. **Claude's built-in web search** — always available, no setup.
2. **Tavily, Exa, Firecrawl** if the user has connected them (their own keys) — exact call patterns in `underwriter-os/docs/DATA-SOURCES.md`. Also **FRED**/**Census** for macro & demographic facts, and a connected parcel data source (`quarry-parcels`) for property/owner facts.
3. **Yardi Matrix / finance connectors** if connected (real estate / market data).
Run the full method below regardless of which tools fire.
## Method
1. **Clarify the decision.** One sharp question if scope is unclear: what decision will this inform, and how deep do they need it? Then proceed.
2. **Decompose** the question into 4–8 sub-questions. State them.
3. **Fan out:** search each sub-question. Prefer primary and authoritative sources (government data, company filings, official market reports, reputable trade press). Note the date of every source.
4. **Triangulate:** confirm important facts across 2+ independent sources. Flag anything you can only find once as "single-source — verify."
5. **Adversarially check:** actively look for data that cont