Module app 

macOS app integration command implementations.

Responsibilities:

• Implement ralph app open by launching the installed SwiftUI app via the macOS open command.
• Pass workspace context via custom URL scheme ralph://open?workspace=<path>
• Keep the invocation logic testable by separating “plan” from execution.

Not handled here:

• Building or installing the SwiftUI app (see apps/RalphMac/).
• Any in-app IPC; the app drives Ralph by executing the CLI as a subprocess.

Invariants/assumptions:

• The default bundle identifier is com.mitchfultz.ralph.
• Non-macOS platforms reject ralph app open with a clear error and non-zero exit.
• URL scheme ralph:// must be registered in the app’s Info.plist.

Functions

open

Open the Ralph macOS app.