Deep Diligence Agent: An Open Blueprint Requiring Evidence for Every Claim

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The Deep Diligence Agent is an open blueprint built on the LangChain deep agents harness within a custom governance layer, designed to make diligence reports traceable. It starts with a brief that the agent turns into a plan, which a person must approve before any research begins. Specialist researchers then work in parallel on financial, product, and market questions, and any finding lacking a citation to a real case document is refused outright. Sources must be registered before use, and a separate verification pass re-checks each claim against the cited documents, pulling out claims that fail. The design treats a report as an evidence task rather than a writing task, aiming to prevent weak or unverifiable statements from reaching reviewers.

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