I’m Jonathan, the CTO of Loyal, with over two decades of experience in software development for startups. This space is where I share my experiences, insights, and opinions—both popular and unconventional.
My ramblings will be on mobile and web applications, startup launches, favorite books, user acquisition, user experience, (maybe parenting) and most importantly, driving revenue.
A disk-space tool showed me 141 GB in com.docker.docker. My cleanup.sh had been running weekly for two years and barely touched it. The culprit wasn't images, containers, or volumes — it was a buildx builder Kamal created and never cleaned up. Here's the script that actually works.
Last month I built a Claude Code skill that produces JJG product plans. This month I built the loop that turns those plans into shipped features — one at a time, with persona QA, agent reviews, and a CEO email at the end.
Xcode hides simulator bloat in three different folders across your disk. A disk-space tool showed me 98 GB in CoreSimulator, 107 GB in AssetsV2, and 125 GB across 19 simulator runtimes. Here's the script that cleans it all.
TDD and BDD are still relevant — but AI coding demands a higher-level philosophy. Here's the full abstraction ladder and where your value as a developer now lives.
Color in your UI is never decorative — it's instructional. Every green chip, red badge, and purple button teaches users a micro-lesson about what things mean, what's urgent, and where to click. Here's how to build a color system that actually works.
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