Three ways to list files and directories up to 3 levels deep on macOS: tree, find, and ls glob patterns.

Breadcrumb navigation is the trail of screen titles showing your path through an app, named after the Hansel and Gretel fairy tale.

Learn what brew tap does and why install guides require it before brew install for third-party packages.

Reset frozen macOS system processes like Dock, Finder, Bluetooth, and audio without rebooting using killall and launchctl.

Delete all GitHub Actions caches with a single command using GitHub CLI instead of clicking through the web interface.

Downsample images before display to cut memory from 26MB to under 1MB per image on iOS.

Install iOS, tvOS, watchOS, and visionOS simulator runtimes from Terminal using xcodebuild.

Migrate from deprecated UIApplicationDelegate application(_:open:options:) to UISceneDelegate scene(_:openURLContexts:) in iOS 26.

Learn what the shebang line does in scripts and how to use it with zsh, bash, python, and swift.

A Swift builder pattern that reduces MCP server boilerplate from 50+ lines to just 3.