Shared Kernel

Intent

Provide safe, low-coupling primitives reused across bounded contexts.

Allowed Content

• Pure utilities (formatting, small helpers) with no side effects.
• Shared UI atoms/molecules that do not contain business rules.
• Cross-cutting technical helpers (logging adapters, error wrappers) when they do not introduce new dependencies.

Forbidden Content

• Business logic, policies, or workflow orchestration.
• Cross-capability state stores.
• Domain rules that belong to a specific bounded context.
• Direct platform SDK usage (Firebase/HTTP) unless the shared item is explicitly an infrastructure primitive and the dependency direction is preserved.

Dependency Discipline

• Keep dependencies stable and minimal.
• Avoid importing capability modules into shared.

API Design

• Prefer small, intention-revealing APIs.
• Avoid "god" utility modules; create focused files.