Docusign has lost almost a quarter of its market value this year on concern that new AI tools could help customers create in-house version of the software it sells. The company is trying to head off this risk by integrating with the most disruptive AI player of all, OpenAI's ChatGPT. Docusign is bringing its contract-management technology directly into ChatGPT, letting users draft, manage, and sign agreements without leaving the popular AI chat interface.