com_r35157_nenjim-hubd-impl_ref/openspec/changes/archive/2026-08-11-70-refactor-notification-services/tasks.md

1. Notification API Migration

• 1.1 Add the documented BoundNotificationService, AddressedNotificationService, and NotificationDestination API under com.r35157.service.notification.
• 1.2 Remove the old API package, marker interface, notifier contracts, and all compatibility aliases.

2. Transport Implementations

• 2.1 Migrate and rename Pushover to PushoverNotificationService, accept and validate ΩNotificationMessageΩ, and preserve the existing delivery flow.
• 2.2 Migrate and rename Discord to DiscordNotificationService, validate direct messages, and preserve its unimplemented delivery status.
• 2.3 Migrate SMTP to SMTPNotificationService with a validated address-and-subject SMTPDestination, direct binding convenience, direct message validation, and unimplemented delivery status.
• 2.4 Update every production call site and inline example, then confirm the old package and removed types have no remaining production references.

3. Verification

• 3.1 Compile main and test source sets and complete the repository's normal assembly/build without changing tests.
• 3.2 Strictly validate the OpenSpec change and run whitespace/diff checks.
• 3.3 Review the complete diff for scope, generated-source changes, test changes, transport-independent consumer dependencies, and preservation of excluded services.