032 default override basic

// Test 642: Basic Default Override
// Tests that user-defined build steps override stdlib defaults
//
// The stdlib provides ~[default] build:step definitions
// User code can override by defining the same name without [default]
// Expected: User's version wins, diagnostic shows "overridden by main"

~import "$std/build"

// User overrides the default "run" step
~std.build:step(name: "run") {
    echo "USER VERSION: Running custom command"
}

// User defines a new step (no default exists)
~std.build:step(name: "test") {
    echo "Running tests"
}