Univer's Office SDK Hits 1.0 With an AI Agent Toolkit
Software / news
Univer's Office SDK Hits 1.0 With an AI Agent Toolkit
DreamNum's open-source spreadsheet-and-document engine folds six editors into one Apache-2.0 runtime, four years after the project's first commit.
Univer, an open-source SDK for embedding spreadsheets, documents and slides into other software, reached version 1.0.0 on Sept. 24, according to the release DreamNum published on GitHub. The company calls the project "the Office Harness for AI Agents," and 1.0 adds a Server SDK and an AI SDK meant to let a coding agent read and edit an Office document in TypeScript rather than through a human-facing editor.
DreamNum, the company behind the project, shipped two follow-up patches within hours of the main release, a pace that shows how much last-minute cleanup a four-year-old codebase needed to reach a stable 1.0.
| Release | Published (UTC) |
|---|---|
| v1.0.0 | Sept. 24, 2026, 03:27 |
| v1.0.1 | Sept. 24, 2026, 08:44 |
| v1.0.2 | Sept. 24, 2026, 11:32 |
Six editors, one runtime, and an AI SDK
Univer's repository, created on GitHub in September 2022, now carries 19,225 stars and 1,635 forks. Version 1.0 combines six editors, Sheets, Docs, Slides, Boards, Bases and PDFs, under one plugin and command system with a shared Facade API for each. The AI SDK, the release notes say, lets a developer script an agent that reads a document, updates a formula, generates a chart and checks the visual result, all from a TypeScript process rather than a browser session.
What breaks for anyone upgrading from 0.25
The release notes list changes that only someone reading them closely would catch. Univer's supported browser baseline moves from Chrome 70 to Chrome 88, and prebuilt UMD script-tag bundles are gone in favor of module builds. Several Facade calls are removed outright, including createUniverSheet() in favor of createWorkbook(). DreamNum also pulled a feature called Uniscript that let an application register custom formulas by sending function source code over RPC for remote deserialization on a Worker, a pattern the notes describe as replaced by bundling trusted functions directly rather than transmitting code to run elsewhere. The 0.25 branch gets security patches only through September 2027, one year out.
The founder's Feishu pedigree
Univer's founder and chief executive, Liu Yang, led the spreadsheet team at Feishu, ByteDance's workplace platform also sold internationally as Lark, where he worked on pivot tables and charts, according to a profile published by 36Kr. Before founding DreamNum, Liu built Luckysheet, an earlier open-source spreadsheet project that 36Kr reports passed 16,000 GitHub stars. Two other DreamNum engineers named in the profile, Shen Weimin and Min Chengcheng, also previously worked at Feishu.
36Kr reports that DreamNum has raised a seed round from individual investors, with the amount undisclosed, and that the company sells Univer Pro, a paid layer adding real-time collaboration and enterprise integrations on top of the open-source SDK. The profile also states that DreamNum's AI spreadsheet product, Capalyze, scored 68.86 percent on the SpreadsheetBench evaluation in December 2025, ahead of ChatGPT Agent and Excel Copilot. That figure comes from the company itself; The Terminal could not independently verify it.
Where the SDK is already deployed
36Kr's profile names Novartis, Samsung, Faben Information and Digital Horsepower as business customers embedding the Univer engine, and says Capalyze's overseas consumer version has more than 100,000 paying users. DreamNum did not respond to those figures in the GitHub release itself, which focuses only on the technical changes in 1.0.
Univer is not the only agent-facing open-source project drawing scrutiny for what its benchmarks do and do not show. A rival project's own speed claim fell from 24 milliseconds to roughly 3 seconds once an outside tester ran it, and a separate open-source agent manager, Paperclip, patched a maximum-severity flaw only to leak API keys again weeks later. Univer's AI SDK is new enough that it has not yet faced that kind of outside testing.
DreamNum has not said when Univer Pro's enterprise features will be ported to match the 1.0 API, or whether Capalyze's benchmark score will be published somewhere independent parties can rerun it.
Sources
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