Swiftui on Ronan O Ciosoig

Don't Make It Public. Give It a Boundary

Sun, 04 Oct 2026 23:30:43 +0000

A module can already be right about what’s internal and still be wrong about what’s public. In this article I explore what should go in the API for a pure SwiftUI module, the syntax to make it work, and the reasoning behind it.

This is the third part of a series about how to enhance validation in the agentic loop. See the accompanying code repo on Github here.

Faster UX review

I was working on the checkout flow. It was a funnel of the following screens: shopping cart, address, delivery and extras, payment method, card entry, processing, and confirmation. What I needed to iterate on back then was a new payment method. It was tedious to have to click through all the screens each time, so I decided to add a scenario in the micro-app for payment methods, giving direct access to each step.

AI Writes Fast. Your Safety Net Needs to Be Faster.

Sat, 01 Aug 2026 12:37:28 +0000

I’ve been writing code for the past year switching between Copilot, Claude Code and Codex (sorry Cursor, it just didn’t happen). With these tools, building a flow of screens for an app — the UI, the model, a first pass at test coverage — takes minutes instead of days.

What hasn’t gotten any faster is what happens next: the review process of the code changes before merging it into a large, live production project. It has to be manually reviewed line by line. Am I confident that an agent-generated PR is correct? Definitely not. It generates plausible code that compiles, but often has a subtle change that isn’t correct. In general, the higher velocity output in generated code has led to more bugs — AI-generated code creates 1.7x more problems than human-written code, per CodeRabbit’s analysis.