Guides
Faster Xcode builds on CI
How Xcode’s caches behave on GitHub Actions, what macOS minutes cost, and what actually shortens a build. Each guide
stands on its own and cites its sources; where Warmbuild fits, it says so separately.
Caching
Xcode 26 compilation caching on GitHub Actions
What the feature is, how to turn it on, why a fresh runner gets nothing from it, and what sharing it between runners takes.
Caching
Why caching DerivedData with actions/cache doesn’t speed up Xcode builds
Timestamps, absolute paths, size and cache rules, measured on a real build, and what to cache instead.
Cost
What macOS runner minutes cost on GitHub Actions, and how to cut them
Current per-minute prices, how billing counts, a worked month, and seven levers with the YAML for each.
Coding agents
Warm Xcode builds for coding agents
Why every worktree builds cold for Claude Code, Codex and Cursor, how a shared cache fixes it, and a prompt that sets it up.