Add purpose and demand model extension

infospace/concepts/purpose-demand.yaml

@@ -0,0 +1,67 @@
+id: concept-catalog/purpose-demand
+title: Purpose And Consumer Demand Concept Catalog
+owner: model/purpose-demand-extension
+status: candidate
+version: "0.1"
+concepts:
+  - id: purpose
+    title: Purpose
+    proposed_owner: kernel/itc-core
+    definition: Generic reason or use-value orientation for an actor, artifact, capability, or repo in a context.
+  - id: consumer-purpose
+    title: ConsumerPurpose
+    proposed_owner: model/information-space
+    definition: Declared purpose from a consumer of a producer repo, artifact, profile, service, or canon surface.
+  - id: use-case
+    title: UseCase
+    proposed_owner: model/information-space
+    definition: Bounded scenario in which a consumer applies a producer capability to satisfy a purpose.
+  - id: demand-signal
+    title: DemandSignal
+    proposed_owner: model/information-space
+    definition: Traceable observation indicating consumer need, use, friction, request, value, or preference.
+  - id: consumer-need
+    title: ConsumerNeed
+    proposed_owner: model/information-space
+    definition: Need expressed or inferred from a consumer purpose and demand signals.
+  - id: producer-capability
+    title: ProducerCapability
+    proposed_owner: model/governance
+    definition: Capability, profile, interface, artifact, or service the producer can intentionally provide or promise.
+  - id: purpose-fit
+    title: PurposeFit
+    proposed_owner: model/governance
+    definition: Evaluation of how well producer scope and capabilities satisfy a consumer purpose.
+  - id: scope-pressure
+    title: ScopePressure
+    proposed_owner: model/governance
+    definition: Pressure on producer scope caused by unmet, repeated, high-value, or strategically aligned consumer purposes.
+  - id: evolution-request
+    title: EvolutionRequest
+    proposed_owner: model/task
+    definition: Proposed change to producer artifacts, interfaces, profiles, standards, or scope created in response to purpose pressure.
+relationships:
+  - source: ConsumerPurpose
+    type: anchored_in
+    target: ConsumerIntent
+  - source: ConsumerPurpose
+    type: expresses
+    target: UseCase
+  - source: UseCase
+    type: creates
+    target: DemandSignal
+  - source: DemandSignal
+    type: indicates
+    target: ConsumerNeed
+  - source: ProducerCapability
+    type: satisfies
+    target: ConsumerNeed
+  - source: PurposeFit
+    type: evaluates
+    target: ConsumerPurpose
+  - source: ScopePressure
+    type: arises_from
+    target: PurposeFit
+  - source: EvolutionRequest
+    type: responds_to
+    target: ScopePressure