Field notes

Insights from engineers shipping with LingCode

Real codebases. Real prompts. Real numbers. How power users prototype faster, scale agents in big repos, and pick the tech stack combinations that actually work.

Sample · 2026-05-11 · 12 min read AI workflow Xcode

How I use Claude agents in a 200K-line Xcode project

Six months of running an autonomous agent against a real iOS codebase. Where it shines, where it breaks, and the five workflow patterns that became habit.

Coming soon Prototyping Multi-agent

From idea to TestFlight in six hours

A real walkthrough of a side-project that shipped to TestFlight in an afternoon. Tech stack, prompts, pitfalls, and what was worth automating vs. what wasn't.

Coming soon Scaling Cost

Routing five providers: when each one wins

A breakdown of which model gets which task, with cost-per-PR numbers across Claude, GPT, DeepSeek, Gemini, and LingModel over a quarter of real work.

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