Module manager 

Core PackageManager and Runner traits plus production/test impls.

Structs

MockResponse

Scripted response for one call.

MockRunner

Test runner that records every call and returns scripted responses.

RealRunner

Production runner — spawns a child process via Command.

RunOutcome

Result of a single process invocation.

Enums

PackageError

Errors produced by package manager operations.

Traits

PackageManager

Abstraction over a system package manager.

Runner

Abstraction over process execution so tests can verify behaviour without invoking real system commands.