The previous two posts covered how events flow from the SDK to the UI. This post focuses on visualizing one specific type of event: tool calls. Tool invocations are the most frequent operations in an Agent application. A typical task might call tools twenty or thirty times—reading files, writing files, executing commands, searching code. If every tool call renders as the same gray block, it's hard
Post 1 covered how AgentBridge converts the SDK's AsyncStream<SDKMessage> into [AgentEvent]. This post looks at what [AgentEvent] becomes — how TimelineView renders 18 event types, handles scroll behavior, and stays smooth when the event count gets large. TimelineView is the main body of the workspace, filling all the space between the sidebar and the input box. Its view hierarchy is shallow: Time
I'm a fullstack web developer with 6 years of experience. Python, Rust, JS, databases, and APIs. That's my day job. I had never touched electronics. A few weeks ago, I decided to build CyberKey. The itch came from something boring at work: my VPN disconnects when I lock my computer, and I have to type a TOTP code several times a day. Unlock my phone, open the authenticator app, read the code, type