dsh-plugin-spreadjs-editor

Handling spreadsheets inside DeepSeek Harness used to mean dragging files out of the browser, opening a separate desktop app, and dragging them back in once you were done. This plugin folds spreadsheet work directly into the right-side file tree: select a .xlsx, .xlsm, .csv, .sjs, or .ssjson file to preview it inline, or launch SpreadJS Designer for full editing. The editor follows the system light or dark theme automatically and ships with SpreadJS 19.1.4 and Designer 19.1.4 built in, so there is no build step to worry about.

The more interesting piece is how it collaborates with an AI agent. Pair it with the dsh-spreadjs-driver plugin and you can simply tell the agent to make the amount column red and watch the change land on the sheet you are looking at. The editor hands its live workbook to a same-page bridge service, so the edit targets the very object the Designer is rendering rather than a file copy. The file on disk stays untouched until you explicitly ask for a save, and unsaved edits are never clobbered.

It suits developers, analysts, and ops engineers who regularly work with tabular data inside Harness and want to both skim and tweak workbooks quickly and lean on an agent for bulk edits, all while keeping every step inspectable and reversible.