Talk to Excel in DeepSeek Harness: create/edit spreadsheets, formulas, styles, filters, and tables by conversation; auto-verifies formulas after every edit, repairs silent errors, and validates charts.

IMAP/SMTP email tools for DeepSeek Harness: list, read, search and send mail, with QQ/163/126/Sina/Aliyun/Gmail/Outlook/iCloud presets.