Module dead_letter 

Dead letter queue for undeliverable messages.

When a KernelMessage cannot be delivered (target not found, inbox full, timeout, governance denied, agent exited), it is routed to the DeadLetterQueue instead of being silently dropped.

Structs

DeadLetter

A dead-lettered message with metadata.

DeadLetterQueue

Queue for messages that could not be delivered.

Enums

DeadLetterReason

Reason a message was dead-lettered.

Constants

DEFAULT_DLQ_CAPACITY

Default maximum number of dead letters retained.