Xcode 26.3 - Agentic Coding with Free OpenAI Account

Want to try agentic coding in Xcode 26.3 but don't want to pay for OpenAI or Claude? You're in luck! This video demonstrates how to build a complete habit tracker app using Xcode's Codex agent with just a free ChatGPT account. Following up on my previous video where I used a paid Claude account, I'm now showing you that anyone can experiment with AI-powered coding assistance without spending a dime. Watch as I build the same habit tracker app from my previous video, but this time using OpenAI's free tier with the Codex agent. In this video, you'll learn how to set up agents and skills in Xcode 26.3, configure your free ChatGPT account, and let the AI build a fully functional SwiftUI app with Swift Data. I'll show you where to place agent files, how to work with the Codex agent, and troubleshoot issues as they arise.The final app includes habit tracking, daily/weekly tracking options, color coding, streak tracking, and sample data for previews—all generated through agentic coding with a free account. If you want to support my work, you can buy me a coffee :)  https://ko-fi.com/stewartlynch/ My Newsletter https://stewartlynch.kit.com Channel Listing Mac App (Free) https://stewartlynch.gumroad.com/l/obsjz Channel Listing Web App  https://stewartlynch.github.io/YouTube/ References mentioned in video:  Xcode 26.3 Agentic Coding https://youtu.be/QdpaI_j0FRU Agent (Paul Hudson) Swift Agents https://github.com/twostraws/SwiftAgents Skills (Antoine van der Lee) SwiftUI Expert Skill https://github.com/AvdLee/SwiftUI-Agent-Skill Swift Concurrency Agent Skill https://github.com/AvdLee/Swift-Concurrency-Agent-Skill Agents.md for Codex: https://gist.github.com/StewartLynch/07f7aad6b1731fbb350bf6c1afdb3006 Prompt for Habit Tracker: https://gist.github.com/StewartLynch/f49165e4309d930516ba1e36a6a818b3 Recommended Resources:  Big Mountain Studio Books  AI Mastery in SwiftUI https://www.bigmountainstudio.com/ai-mastery/77jt8 SwiftUI Views Mastery https://www.bigmountainstudio.com/advanced-views/77jt8 Advanced SwiftUI Views Mastery     https://www.bigmountainstudio.com/advanced-views/77jt8 SwiftUI Animations Mastery https://www.bigmountainstudio.com/animations/77jt8 SwiftData Mastery in SwiftUI     https://www.bigmountainstudio.com/swiftdata/77jt8  Combine Mastery in SwiftUI  https://www.bigmountainstudio.com/combine/77jt8 SwiftUI 5 Book Bundle     https://www.bigmountainstudio.com/book-bundle/77jt8