My wife convinced me to finally ship the app we’ve been using for years
My wife and I have been using a shopping list app I built for ourselves for a few years now. Not because I'm a genius product designer. Not because I …
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I Built a macOS App to Detect Fake Lossless Audio
A WAV file is not always what it claims to be. If you download a track labeled .wav from a music store, you assume it's lossless — uncompressed PCM au…
Weekly Dev Log 2026-W03
🗓️ This Week Finally finished the Cyber Security 101 learning path and discovered the AI Security Learning Path on TryHackMe Completed 2 rooms from th…
iOS 26 SDK Is Now Mandatory — Here Is What Actually Changes for Your App
Starting April 28, 2026, Apple will reject any app or update submitted to App Store Connect unless it is built with the iOS 26 SDK. If you have not mi…
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…
Deep Dive into Open Agent SDK (Part 5): Session Persistence and Security
An Agent is more than a one-shot Q&A tool. A truly useful Agent must do three things: remember context (where we left off), control permissions (w…
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 3): MCP Integration in Practice
The previous article looked at the SDK's 34 built-in tools — file read/write, Bash execution, code search — covering common development scenarios. But…
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…
I turned the cutout in the MacBook screen into a dynamic user interface element (DynamicNotch for macOS)
When Apple added notch to the MacBook, many people reacted the same way.: He's there, and you just have to put up with him . Unlike the iPhone, where …
How I built a free-forever iOS travel app with no backend, no analytics, and no ads (as a self-taught dev)
No backend, no analytics, no paid tier, and the story of accidentally becoming a developer while building an app for Kyoto's under-visited 80%. Hi Dev…
Weekly Dev Log 2026-W02
🗓️ This Week 📱 iOS (SwiftUI) Worked on the SwiftUI tutorial and completed Section 4 (Create an algorithm for badges) Built a test file to verify the b…
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 …
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 …
Weekly Dev Log 2026-W01
🗓️ This Week 📱 iOS (SwiftUI) Worked on the SwiftUI tutorial and completed Section 4 Steps 9–12 (Create an algorithm for badges) 🌐 Web Development Star…
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…
On-Device ML iOS: Why Apple's Foundation Models Change Everything
Over 2.8 billion iOS devices now have the computational power to run language models locally — yet most developers are still sending user data to exte…
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…