| name | 0.4.3-understand-datatype_channel |
| description | [0.4.3] A channel dedicated to one message type, enforcing contract clarity at the channel level rather than inside th |
understand-datatype_channel
CALL NUMBER: enterprise_integration_patterns.datatype_channel : deep_message(6), deep_message_channel(1)
DEFINITION: A channel dedicated to one message type, enforcing contract clarity at the channel level rather than inside the payload.
Invoke this skill to understand datatype_channel down to its primitives. The RELATIVE ROOT below is the least-fixed-point closure of everything it bundles from — the full import cone, grouped by the lib each prim comes from. Projected from a prover-typed KB (MAP/SWI-Prolog consistency gate): every reference below resolves.
THE RELATIVE ROOT (the import cone, by lib)
from ?
- channel_bridge (d3): A connection point that joins two channel segments or a channel to an external system, enabling message flow across the boundary while preserving channel semantics.
from deep_message
- dm_004 (d3): document_schema: A formal contract defining the expected payload_structure fields, their types, cardinality, and optionality for a given business_object_type.
- dm_001 (d4): payload_structure: The internal data shape of a document message, comprising typed fields and nested data elements that constitute the complete business data being transmitted.
- dm_002 (d5): semantic_envelope: Metadata wrapper around the payload describing document provenance, intent classification, and temporal context without prescribing receiver action.
- dm_003 (d5): business_object_type: A typed classifier identifying the kind of business entity the document represents, such as purchase_order, invoice, or shipment_manifest.
- dm_005 (d6): content_identifier: A stable unique reference (document_id, correlation token) that identifies this specific document instance across systems and message stores.
- dm_006 (d6): processing_hint: An optional non-directive annotation suggesting preferred handling, urgency, or routing preference without constituting a command.
from deep_message_channel
- untyped_channel (d1): A channel without a declared datatype that accepts messages of any type, serving as the contrast to datatype channels.
from enterprise_integration_patterns
- message_channel (d1): A virtual pipeline through which messages travel from sender to receiver; analogous to a typed stream or queue.
- channel_adapter (d2): A connector that bridges external systems or protocols into a messaging channel, encapsulating the legacy system's API.
- channel_purger (d2): A system management pattern that periodically clears a channel of stale or poison messages to reset system state.
- dead_letter_channel (d2): A channel where messages go after exhausting retries, signaling a delivery failure requiring intervention.
- detour (d2): A system management pattern that reroutes messages through a debugging or inspection step before resuming normal delivery.
- health_check_endpoint (d2): A monitoring interface that exposes integration component status (channels healthy, queues depth, processing lag) for observability.
- invalid_message_channel (d2): A channel that captures malformed or unprocessable messages for manual inspection instead of blocking the main flow.
- point_to_point_channel (d2): A channel with exactly one consumer per message; guarantees that exactly one receiver processes each message.
- polling_consumer (d2): A consumer that repeatedly queries a source for new messages rather than receiving them push-style from a channel.
- publish_subscribe_channel (d2): A channel where one publisher sends and all subscribed receivers consume; each gets its own copy of the message.
- test_message (d2): A system management pattern that injects a known probe message into the flow to verify correct processing downstream.
- wire_tap (d2): A system management pattern that taps into a channel to observe messages without disrupting the normal flow.
- messaging_gateway (d3): A Façade that exposes integration functionality to internal clients while hiding the underlying messaging API and complexity.
- durable_subscriber (d3): A subscriber registration that survives broker restarts; undelivered messages are queued and delivered once the subscriber reconnects.
- event_subscription (d3): The registration of a consumer's interest in receiving messages from a particular channel or topic based on content or type.
- list_of_interceptors (d3): A system management pattern that registers interceptor objects to run before or after message processing for cross-cutting concerns.
CONSUMERS (what needs this)
channel_type_declaration, channel_typing_discipline, message_channel, type_constraint_enforcement, type_matching_check, type_metadata, type_safe_consumer, type_safe_producer, type_schema_binding
Projected from the enterprise integration patterns KB (154 concepts / 176 relations) — consistency-typed by MAP; the facet list after the colon IS the cross-lib dependency web.
(leaf — this is an actual skill.)
