fix: complete spawn chain — market_research→design, design→reviews+roundtable

Closes the two broken links in the incubation pipeline:
- market_research now spawns company_design (Phase 1→2)
- company_design now spawns 4 design_reviews + design_roundtable (Phase 2→3/4)

Also: cleaned up design_review to use identity-driven review instead of IF/ELSE blocks

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

templates/company_design.yml

@@ -80,5 +80,57 @@ steps:
   - type: document
     filename: "company-design-spec-{{task_name_slug}}"
 
+  - type: package
+    hint: |
+      The design specification is complete. Now spawn four independent reviews —
+      one from each board member — plus a roundtable that depends on all four.
+      The roundtable will reach consensus and spawn the polish step automatically.
+    schema:
+      design_spec: string
+    spawn:
+      - task_type: design_review
+        task_name: "Design Review (Peter): {task.message}"
+        agent_name: Peter
+        priority: 6
+        context:
+          design_spec: "{design_spec}"
+          review_focus: financial_viability
+
+      - task_type: design_review
+        task_name: "Design Review (David): {task.message}"
+        agent_name: David
+        priority: 6
+        context:
+          design_spec: "{design_spec}"
+          review_focus: technical_feasibility
+
+      - task_type: design_review
+        task_name: "Design Review (Sarah): {task.message}"
+        agent_name: Sarah
+        priority: 6
+        context:
+          design_spec: "{design_spec}"
+          review_focus: market_fit
+
+      - task_type: design_review
+        task_name: "Design Review (Elena): {task.message}"
+        agent_name: Elena
+        priority: 6
+        context:
+          design_spec: "{design_spec}"
+          review_focus: operational_completeness
+
+      - task_type: design_roundtable
+        task_name: "Design Roundtable: {task.message}"
+        agents: [Peter, David, Sarah, Elena]
+        priority: 7
+        context:
+          design_spec: "{design_spec}"
+        depends_on:
+          - "Design Review (Peter): {task.message}"
+          - "Design Review (David): {task.message}"
+          - "Design Review (Sarah): {task.message}"
+          - "Design Review (Elena): {task.message}"
+
   - type: close
     rag_update: true