Across the previous seven articles plus a bonus chapter, we thoroughly explored the inner workings of Open Agent SDK — Agent Loop, the tool system, MCP integration, multi-Agent collaboration, conversation persistence, and multi-LLM support. The bonus chapter even embedded the SDK into a macOS native app, Motive, and ran it live. But Motive was just a backend-swap experiment. The real question is: once you have the SDK, how do you build a complete Agent application from scratch? The SDK gives you the Agent's "brain" — but users don't see the Agent Loop; they see an interface. When the Agent is calling tools, reading files, and executing commands, users need to know what it's doing, how things are progressing, and what the results are. That's the problem SwiftWork set out to solve — a macOS-native Agent visual workbench. What is SwiftWork SwiftWork is a macOS-native AI Agent desktop application. Its purpose in one sentence: let users see what the Agent is doing.…