Start here 6 min read
How I run AI agents on production code
For six months a fleet of AI coding agents has done most of my production work. The agents were never the hard part. This is the machinery that makes it safe.
Lucas Firmo · Senior iOS engineer
I build iOS apps, and the AI agent systems that help ship them.
Practical notes from 13 years of Swift and from running a fleet of AI coding agents on production code. Short, tested, and written for working engineers.
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Latest posts
All posts 2 min read
I moved our production app to Swift 6 in 10 days. Here's what it took.
No big-bang rewrite. Small PRs, a warnings baseline on every PR and tests on the old code before touching it.
4 min read
Identifiable made easy
Learn why SwiftUI lists need stable identity, how Identifiable gives it to them, and the identity mistakes that make rows animate wrong or keep the wrong state.
3 min read
@Binding made easy
Learn how @Binding lets SwiftUI views share and update state seamlessly. We'll cover the difference between read-only and read & write bindings, with clear examples to keep your code clean and in sync.
1 min read
@State made easy
Discover how @State helps SwiftUI views manage their own data. A simple guide with clear examples to understand how state works and why it's essential for building dynamic UIs.
What I write about
iOS and Swift
SwiftUI, Swift 6 concurrency and the patterns that hold up in a large production app.
AI agents on real code
How to run coding agents on a production codebase with review, proof and guardrails.
Engineering practice
Small reviewable steps, tests that fail first, and measuring before and after.
Open to senior iOS and applied AI work
Remote from São Paulo, working US hours. Contractor or EOR, no visa needed.
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