Add purpose and demand model extension

workplans/ITC-WP-0006-purpose-and-demand-model.md

@@ -4,7 +4,7 @@ type: workplan
 title: "Purpose And Demand Model Extension"
 domain: canon
 repo: info-tech-canon
-status: proposed
+status: finished
 priority: high
 created: "2026-05-23"
 updated: "2026-05-23"
@@ -47,7 +47,7 @@ PURPOSES
 
 ```task
 id: ITC-WP-0006-T01
-status: todo
+status: done
 priority: high
 state_hub_task_id: "654ce87f-2967-4998-8528-3ec6db31ff1c"
 ```
@@ -68,7 +68,7 @@ state_hub_task_id: "654ce87f-2967-4998-8528-3ec6db31ff1c"
 
 ```task
 id: ITC-WP-0006-T02
-status: todo
+status: done
 priority: high
 state_hub_task_id: "9fb752da-3daa-4f7b-96d4-3887673e68c2"
 ```
@@ -82,7 +82,7 @@ state_hub_task_id: "9fb752da-3daa-4f7b-96d4-3887673e68c2"
 
 ```task
 id: ITC-WP-0006-T03
-status: todo
+status: done
 priority: high
 state_hub_task_id: "f2ec2951-fe90-48c6-acf2-35e0b7183513"
 ```
@@ -96,7 +96,7 @@ state_hub_task_id: "f2ec2951-fe90-48c6-acf2-35e0b7183513"
 
 ```task
 id: ITC-WP-0006-T04
-status: todo
+status: done
 priority: medium
 state_hub_task_id: "5cfd80ee-3b04-4389-862b-d7913e953076"
 ```
@@ -110,3 +110,14 @@ state_hub_task_id: "5cfd80ee-3b04-4389-862b-d7913e953076"
 - PURPOSES is defined enough to use in the first consumer evaluations.
 - The relation between INTENT, SCOPE, and PURPOSES is explicit.
 - Governance model extension candidates are documented for review.
+
+## Implementation Notes
+
+- Added a candidate Purpose and Demand model extension under Governance.
+- Added a structured concept catalog for Purpose, ConsumerPurpose, UseCase,
+  DemandSignal, ConsumerNeed, ProducerCapability, PurposeFit, ScopePressure,
+  and EvolutionRequest.
+- Added the INTENT/SCOPE/PURPOSES pattern and governance extension mapping.
+- Added canon-side examples for user-engine, railiance-fabric, and repo-scoping.
+- Extended validation and retrieval generation so the new PURPOSES assets are
+  indexed, briefed, and checked.

workplans/index.yaml

@@ -83,7 +83,7 @@ workplans:
 
   - id: ITC-WP-0006
     title: Purpose And Demand Model Extension
-    status: proposed
+    status: finished
     priority: high
     path: workplans/ITC-WP-0006-purpose-and-demand-model.md
     depends_on: