diff --git a/cookbooks/trees/foundary.yaml b/cookbooks/trees/foundary.yaml
index 65462f7..7940098 100644
--- a/cookbooks/trees/foundary.yaml
+++ b/cookbooks/trees/foundary.yaml
@@ -80,44 +80,49 @@ steps:
       - sdlc_initialized: .data.initialized
 
   # ============================================================
-  # SECTION 2: ARCHITECT (Shell Stubs for Future Chat/Blueprint APIs)
-  # Documents the conversational architect flow that will use
-  # POST /projects/{id}/chat and GET /projects/{id}/blueprints
+  # SECTION 2: ARCHITECT
+  # Conversational product design via architect API.
+  # Starts a conversation, refines architecture, generates blueprint.
   # ============================================================
-  architect-session:
-    description: "Simulate architect conversation (stub for future chat API)"
+  architect-start:
+    description: "Start architect conversation about product goals"
     depends_on: [verify-sdlc]
-    action: shell
-    command: |
-      cat <<'ARCHITECT'
-      ============================================================
-      FOUNDARY ARCHITECT SESSION (Future: POST /projects/{id}/chat)
-      ============================================================
-      The architect conversation would:
-      1. Discuss product goals for a task management studio
-      2. Identify core entities: projects, tasks, labels, assignments
-      3. Propose two features for MVP:
-         - Feature 1: data-models (Core Data Models & Persistence)
-         - Feature 2: task-management-ui (Task Management UI)
-      4. Generate blueprint (Future: GET /projects/{id}/blueprints)
+    action: api
+    method: POST
+    endpoint: "/projects/{{ .outputs.create-project.project_id }}/architect/start"
+    body:
+      prompt: "I want to build a task management studio. The product needs: 1) Core data models for Task, Project, Label, and Assignment entities with full CRUD stored in Postgres via studio-db, exposed as REST endpoints on studio-api. 2) A React frontend in studio-ui with a Kanban board (drag-and-drop columns: To Do, In Progress, Done), task creation/edit modals, and filtering by label and assignee. Propose the architecture and identify the two MVP features we should build."
+    outputs:
+      - conversation_id: .data.id
 
-      Feature definitions for downstream SDLC:
-      {
-        "features": [
-          {
-            "slug": "data-models",
-            "title": "Core Data Models & Persistence",
-            "requirements": "Define Task, Project, Label, and Assignment entities with full CRUD. Postgres storage via studio-db. REST endpoints on studio-api. Include migrations, repository layer, service layer, and handler tests."
-          },
-          {
-            "slug": "task-management-ui",
-            "title": "Task Management UI",
-            "requirements": "React UI in studio-ui for managing tasks. Kanban board view with drag-and-drop columns (To Do, In Progress, Done). Task creation/edit modal. Filter by label and assignee. Connects to studio-api REST endpoints."
-          }
-        ]
-      }
-      ARCHITECT
-      echo "Architect session complete — feature definitions ready"
+  architect-refine:
+    description: "Refine architecture with component details"
+    depends_on: [architect-start]
+    action: api
+    method: POST
+    endpoint: "/projects/{{ .outputs.create-project.project_id }}/architect/continue/{{ .outputs.architect-start.conversation_id }}"
+    body:
+      message: "Good. Let's define exactly two features for the MVP: Feature 1 'data-models' covers the persistence layer (Task, Project, Label, Assignment entities, migrations, repository layer, service layer, handler tests). Feature 2 'task-management-ui' covers the React frontend (Kanban board, task CRUD modals, label/assignee filters). Feature 2 depends on Feature 1 being complete since it consumes the API. Please confirm this breakdown and note any architectural considerations."
+
+  architect-generate-blueprint:
+    description: "Generate structured blueprint from conversation"
+    depends_on: [architect-refine]
+    action: api
+    method: POST
+    endpoint: "/projects/{{ .outputs.create-project.project_id }}/architect/generate-blueprint/{{ .outputs.architect-start.conversation_id }}"
+    body:
+      name: "foundary-studio-mvp"
+    outputs:
+      - blueprint_id: .data.blueprint.id
+
+  architect-verify-blueprint:
+    description: "Verify blueprint was persisted"
+    depends_on: [architect-generate-blueprint]
+    action: api
+    method: GET
+    endpoint: "/projects/{{ .outputs.create-project.project_id }}/blueprints/{{ .outputs.architect-generate-blueprint.blueprint_id }}"
+    outputs:
+      - blueprint_name: .data.name
 
   # ============================================================
   # SECTION 3: FEATURE 1 — Core Data Models (draft → released)
@@ -127,7 +132,7 @@ steps:
   # --- Phase 1: Draft ---
   f1-create-feature:
     description: "Create data-models feature in draft phase"
-    depends_on: [architect-session]
+    depends_on: [architect-verify-blueprint]
     action: api
     method: POST
     endpoint: "/projects/{{ .outputs.create-project.project_id }}/sdlc/features"