A business decision that looks good on paper could become an expensive mistake when executed. What if you could test for the consequences before making such decision? That's the problem I set out to solve with KnockOn. @univerHQ just released version 1.4, introducing Space and expanding what developers can build with its SDK. With the introduction of Univer Space, developers can now build agent-native workspaces that bring documents, spreadsheets, file management, and AI workflows into one environment. But what does building with Univer actually look like in practice? I've spent the past few days exploring that question, and the result is KnockOn, an interactive economics lab for small business owners and economics learners, built using the Univer SDK.