Deep Dive into Open Agent SDK (Part 6): Multi-LLM Providers and Runtime Controls
An Agent shouldn't be locked to a single LLM provider. Different tasks suit different models — simple questions use cheap models, complex reasoning us…
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Deep Dive into Open Agent SDK (Part 4): Multi-Agent Collaboration
A single Agent, no matter how powerful, is just one executor. Real development tasks are often multi-step and multi-role: someone explores the codebas…
Deep Dive into Open Agent SDK (Part 2): Behind the 34 Built-in Tools
The previous article analyzed how the Agent Loop works, including one crucial step: "execute tools." When the LLM says "I need to call Bash," the SDK …
Deep Dive into Open Agent SDK (Part 1): Agent Loop Internals
Most LLM wrapper libraries do three things: send a request, get a response, done. But a true Agent goes further — it decides whether to call tools, ex…
Open Agent SDK (Swift): Build AI Agent Applications with Native Swift Concurrency
If you're a Swift developer looking to integrate AI Agent capabilities into your macOS apps, the options are slim. Most Agent frameworks are built for…
Beyond the Back Button: Mastering State-Driven Navigation for AI Workflows in SwiftUI
Building an AI-powered app isn't like building a standard CRUD application. In a traditional app, navigation is linear: you tap a button, you push a v…
Background Tasks: The One Actor in the Codebase and the SIGTERM Bug That Only Broke on Linux
Our agent can plan multi-step work with a persistent task DAG, compress its own memory, delegate to subagents, and load skills on demand — all driven …
Building ambient desktop particles for macOS with CAEmitterLayer
I recently shipped a free macOS app called Wisp — a menu bar utility that adds gentle, glowing particles between your wallpaper and your desktop icons…
Building "Guide": An iOS App for Crisis Response
The Mission When an emergency hits a hotel, the biggest enemy is fragmented information. My goal with Guide was to create a reliable, minimalist tool …
Yotei - Highly modular & customizable SwiftUI calendar
I built a calendar package for iOS that focuses on modularity, customization, and performance. GitHub: https://github.com/claustrofob/Yotei Why I buil…
Task System: A File-Based DAG That Survives Context Compaction
In the previous guide, we built a three-layer compaction strategy that lets the agent run indefinitely. That's a major capability — but it comes with …
Context Compaction: Three Layers of Compression That Let an Agent Run Indefinitely
Our agent has come a long way. It runs commands, reads and writes files, tracks its own work, delegates to subagents, and loads skills on demand — sev…
A 13MB Cursor Monitor: AppKit, Undocumented APIs, Zero Dependencies
My company recently started supporting Cursor, so I jumped in. But checking usage meant opening the dashboard every time — and if Max mode was on with…