Golang Architecture

Not usually.

If orders, inventory, and notifications are separate capabilities, putting them all into one big service struct often creates a god service and blurs ownership.

A better Go shape is:

- keep separate domain-focused services or packages, such as `orders`, `inventory`, and `notifications`
- define small interfaces where one capability depends on another
- wire them together in `main` or constructors

For example:

- `internal/orders.Service`
- `internal/inventory.Service`
- `internal/notifications.Service`

Then `orders.Service` can depend on small consumer-side interfaces like:

```go
type InventoryChecker interface {
    Reserve(ctx context.Context, sku string, qty int) error
}

type Notifier interface {
    SendOrderConfirmed(ctx context.Context, orderID string) error
}
```

That keeps business rules in the owning package, avoids hidden globals, and makes testing easier.

Use one service struct only if those responsibilities are truly one tightly coupled capability. If it is already handling multiple domains, split it by capability and compose them at the application boundary.