check-layers

name	check-layers
description	Audit Package.swift for ExtremePackaging layer compliance (downward-only deps, no cycles, no feature-to-feature). Use before merging any package-graph change.

Audit the Package.swift for ExtremePackaging layer compliance.

Read Package.swift and verify:

1. Every target's dependencies flow downward only (Foundation <- DesignSystem <- Infrastructure <- Feature <- App)
2. No circular dependencies exist
3. No feature-to-feature dependencies (features must go through protocols in Infrastructure)
4. All targets have corresponding test targets

Report any violations with the target name, its layer, and which dependency breaks the rule. Suggest the correct fix for each violation.