diff --git a/capability_manager/built_in_capabilities/GenerateUserInteractionPlanCapability.py b/capability_manager/built_in_capabilities/GenerateUserInteractionPlanCapability.py
index e69de29..4724912 100644
--- a/capability_manager/built_in_capabilities/GenerateUserInteractionPlanCapability.py
+++ b/capability_manager/built_in_capabilities/GenerateUserInteractionPlanCapability.py
@@ -0,0 +1,18 @@
+"""Capability to generate a user interaction plan."""
+
+from ..Capability import Capability
+
+
+class GenerateUserInteractionPlanCapability(Capability):
+    """Stub that would plan system prompts and expected user responses."""
+
+    def __init__(self):
+        super().__init__(
+            name="GenerateUserInteractionPlanCapability",
+            description="Create an outline of planned interactions with the user.",
+        )
+
+    def execute(self):  # pragma: no cover - minimal stub
+        """Execute generation of the interaction plan."""
+        pass
+
diff --git a/capability_manager/built_in_capabilities/UpdateUserInteractionPlanCapability.py b/capability_manager/built_in_capabilities/UpdateUserInteractionPlanCapability.py
index e69de29..5ceb816 100644
--- a/capability_manager/built_in_capabilities/UpdateUserInteractionPlanCapability.py
+++ b/capability_manager/built_in_capabilities/UpdateUserInteractionPlanCapability.py
@@ -0,0 +1,18 @@
+"""Capability to update an existing user interaction plan."""
+
+from ..Capability import Capability
+
+
+class UpdateUserInteractionPlanCapability(Capability):
+    """Stub for adjusting an existing interaction plan based on feedback."""
+
+    def __init__(self):
+        super().__init__(
+            name="UpdateUserInteractionPlanCapability",
+            description="Modify a previously generated user interaction plan.",
+        )
+
+    def execute(self):  # pragma: no cover - minimal stub
+        """Apply updates to the interaction plan."""
+        pass
+
diff --git a/capability_manager/built_in_capabilities/__init__.py b/capability_manager/built_in_capabilities/__init__.py
index 3cb4f4e..d09326c 100644
--- a/capability_manager/built_in_capabilities/__init__.py
+++ b/capability_manager/built_in_capabilities/__init__.py
@@ -2,10 +2,14 @@
 from .InitialAssessmentCapability import InitialAssessmentCapability
 from .MermaidGanttChartCapability import MermaidGanttChartCapability
 from .UserDialogueCapability import UserDialogueCapability
+from .GenerateUserInteractionPlanCapability import GenerateUserInteractionPlanCapability
+from .UpdateUserInteractionPlanCapability import UpdateUserInteractionPlanCapability
 
 __all__ = [
     "EthicalDecisionMakingCapability",
     "InitialAssessmentCapability",
     "MermaidGanttChartCapability",
     "UserDialogueCapability",
+    "GenerateUserInteractionPlanCapability",
+    "UpdateUserInteractionPlanCapability",
 ]
diff --git a/product_manager/built_in_products/BudgetProposalProduct.py b/product_manager/built_in_products/BudgetProposalProduct.py
index e69de29..7c2b216 100644
--- a/product_manager/built_in_products/BudgetProposalProduct.py
+++ b/product_manager/built_in_products/BudgetProposalProduct.py
@@ -0,0 +1,30 @@
+"""Budget Proposal product stub."""
+
+from ..Product import Product
+
+
+class BudgetProposalProduct(Product):
+    """Represents a simple budget proposal document."""
+
+    def __init__(self):
+        super().__init__(
+            name="BudgetProposalProduct",
+            description="Drafts a basic budget proposal for a project.",
+        )
+
+    def draft(self):  # pragma: no cover - minimal stub
+        """Draft the budget proposal."""
+        pass
+
+    def review(self):  # pragma: no cover - minimal stub
+        """Review the budget proposal."""
+        pass
+
+    def complete(self):  # pragma: no cover - minimal stub
+        """Finalize the budget proposal."""
+        pass
+
+    def export(self):  # pragma: no cover - minimal stub
+        """Export the proposal to persistent storage."""
+        pass
+
diff --git a/product_manager/built_in_products/BusinessCaseProduct.py b/product_manager/built_in_products/BusinessCaseProduct.py
index e69de29..794b201 100644
--- a/product_manager/built_in_products/BusinessCaseProduct.py
+++ b/product_manager/built_in_products/BusinessCaseProduct.py
@@ -0,0 +1,30 @@
+"""Business case product stub implementation."""
+
+from ..Product import Product
+
+
+class BusinessCaseProduct(Product):
+    """Represents a simple business case document."""
+
+    def __init__(self):
+        super().__init__(
+            name="BusinessCaseProduct",
+            description="Compile a high level business case for the project.",
+        )
+
+    def draft(self):  # pragma: no cover - minimal stub
+        """Draft the business case."""
+        pass
+
+    def review(self):  # pragma: no cover - minimal stub
+        """Review the business case."""
+        pass
+
+    def complete(self):  # pragma: no cover - minimal stub
+        """Finalize the business case."""
+        pass
+
+    def export(self):  # pragma: no cover - minimal stub
+        """Export the business case to persistent storage."""
+        pass
+
diff --git a/product_manager/built_in_products/CommunicationPlanProduct.py b/product_manager/built_in_products/CommunicationPlanProduct.py
index e69de29..90881d2 100644
--- a/product_manager/built_in_products/CommunicationPlanProduct.py
+++ b/product_manager/built_in_products/CommunicationPlanProduct.py
@@ -0,0 +1,30 @@
+"""Communication plan product stub."""
+
+from ..Product import Product
+
+
+class CommunicationPlanProduct(Product):
+    """Represents a basic communication plan."""
+
+    def __init__(self):
+        super().__init__(
+            name="CommunicationPlanProduct",
+            description="Outline project communication channels and frequency.",
+        )
+
+    def draft(self):  # pragma: no cover - minimal stub
+        """Draft the communication plan."""
+        pass
+
+    def review(self):  # pragma: no cover - minimal stub
+        """Review the communication plan."""
+        pass
+
+    def complete(self):  # pragma: no cover - minimal stub
+        """Finalize the communication plan."""
+        pass
+
+    def export(self):  # pragma: no cover - minimal stub
+        """Export the plan to persistent storage."""
+        pass
+
diff --git a/product_manager/built_in_products/LegalRegulatoryReviewProduct.py b/product_manager/built_in_products/LegalRegulatoryReviewProduct.py
index e69de29..869c039 100644
--- a/product_manager/built_in_products/LegalRegulatoryReviewProduct.py
+++ b/product_manager/built_in_products/LegalRegulatoryReviewProduct.py
@@ -0,0 +1,30 @@
+"""Legal and regulatory review product stub."""
+
+from ..Product import Product
+
+
+class LegalRegulatoryReviewProduct(Product):
+    """Represents legal and regulatory compliance review."""
+
+    def __init__(self):
+        super().__init__(
+            name="LegalRegulatoryReviewProduct",
+            description="Check project compliance with legal and regulatory requirements.",
+        )
+
+    def draft(self):  # pragma: no cover - minimal stub
+        """Draft the review."""
+        pass
+
+    def review(self):  # pragma: no cover - minimal stub
+        """Review compliance results."""
+        pass
+
+    def complete(self):  # pragma: no cover - minimal stub
+        """Finalize compliance sign-off."""
+        pass
+
+    def export(self):  # pragma: no cover - minimal stub
+        """Export the review to storage."""
+        pass
+
diff --git a/product_manager/built_in_products/ProcurementStrategyProduct.py b/product_manager/built_in_products/ProcurementStrategyProduct.py
index e69de29..64771da 100644
--- a/product_manager/built_in_products/ProcurementStrategyProduct.py
+++ b/product_manager/built_in_products/ProcurementStrategyProduct.py
@@ -0,0 +1,30 @@
+"""Procurement strategy product stub."""
+
+from ..Product import Product
+
+
+class ProcurementStrategyProduct(Product):
+    """Represents a simple procurement strategy document."""
+
+    def __init__(self):
+        super().__init__(
+            name="ProcurementStrategyProduct",
+            description="Outline how required goods and services will be procured.",
+        )
+
+    def draft(self):  # pragma: no cover - minimal stub
+        """Draft the procurement strategy."""
+        pass
+
+    def review(self):  # pragma: no cover - minimal stub
+        """Review the procurement strategy."""
+        pass
+
+    def complete(self):  # pragma: no cover - minimal stub
+        """Finalize the procurement strategy."""
+        pass
+
+    def export(self):  # pragma: no cover - minimal stub
+        """Export the strategy."""
+        pass
+
diff --git a/product_manager/built_in_products/ProjectApprovalDocumentationProduct.py b/product_manager/built_in_products/ProjectApprovalDocumentationProduct.py
index e69de29..652e189 100644
--- a/product_manager/built_in_products/ProjectApprovalDocumentationProduct.py
+++ b/product_manager/built_in_products/ProjectApprovalDocumentationProduct.py
@@ -0,0 +1,30 @@
+"""Project approval documentation product stub."""
+
+from ..Product import Product
+
+
+class ProjectApprovalDocumentationProduct(Product):
+    """Represents documentation for project approval."""
+
+    def __init__(self):
+        super().__init__(
+            name="ProjectApprovalDocumentationProduct",
+            description="Collate materials required for formal project approval.",
+        )
+
+    def draft(self):  # pragma: no cover - minimal stub
+        """Draft the approval documentation."""
+        pass
+
+    def review(self):  # pragma: no cover - minimal stub
+        """Review the approval documentation."""
+        pass
+
+    def complete(self):  # pragma: no cover - minimal stub
+        """Finalize documentation for approval."""
+        pass
+
+    def export(self):  # pragma: no cover - minimal stub
+        """Export the approval documentation."""
+        pass
+
diff --git a/product_manager/built_in_products/ProjectCharterProduct.py b/product_manager/built_in_products/ProjectCharterProduct.py
index e69de29..a0e3a3c 100644
--- a/product_manager/built_in_products/ProjectCharterProduct.py
+++ b/product_manager/built_in_products/ProjectCharterProduct.py
@@ -0,0 +1,30 @@
+"""Project charter product stub."""
+
+from ..Product import Product
+
+
+class ProjectCharterProduct(Product):
+    """Represents a basic project charter."""
+
+    def __init__(self):
+        super().__init__(
+            name="ProjectCharterProduct",
+            description="Summarize project objectives, scope and stakeholders.",
+        )
+
+    def draft(self):  # pragma: no cover - minimal stub
+        """Draft the project charter."""
+        pass
+
+    def review(self):  # pragma: no cover - minimal stub
+        """Review the project charter."""
+        pass
+
+    def complete(self):  # pragma: no cover - minimal stub
+        """Finalize the project charter."""
+        pass
+
+    def export(self):  # pragma: no cover - minimal stub
+        """Export the charter."""
+        pass
+
diff --git a/product_manager/built_in_products/ProjectOrganisationChartProduct.py b/product_manager/built_in_products/ProjectOrganisationChartProduct.py
index e69de29..82d1682 100644
--- a/product_manager/built_in_products/ProjectOrganisationChartProduct.py
+++ b/product_manager/built_in_products/ProjectOrganisationChartProduct.py
@@ -0,0 +1,30 @@
+"""Project organisation chart product stub."""
+
+from ..Product import Product
+
+
+class ProjectOrganisationChartProduct(Product):
+    """Represents a project organisation chart."""
+
+    def __init__(self):
+        super().__init__(
+            name="ProjectOrganisationChartProduct",
+            description="Visual depiction of project roles and reporting lines.",
+        )
+
+    def draft(self):  # pragma: no cover - minimal stub
+        """Draft the organisation chart."""
+        pass
+
+    def review(self):  # pragma: no cover - minimal stub
+        """Review the organisation chart."""
+        pass
+
+    def complete(self):  # pragma: no cover - minimal stub
+        """Finalize the organisation chart."""
+        pass
+
+    def export(self):  # pragma: no cover - minimal stub
+        """Export the chart."""
+        pass
+
diff --git a/product_manager/built_in_products/ProjectScheduleProduct.py b/product_manager/built_in_products/ProjectScheduleProduct.py
index e69de29..a11c5e5 100644
--- a/product_manager/built_in_products/ProjectScheduleProduct.py
+++ b/product_manager/built_in_products/ProjectScheduleProduct.py
@@ -0,0 +1,30 @@
+"""Project schedule product stub."""
+
+from ..Product import Product
+
+
+class ProjectScheduleProduct(Product):
+    """Represents a basic project schedule."""
+
+    def __init__(self):
+        super().__init__(
+            name="ProjectScheduleProduct",
+            description="Create a timeline of project activities.",
+        )
+
+    def draft(self):  # pragma: no cover - minimal stub
+        """Draft the project schedule."""
+        pass
+
+    def review(self):  # pragma: no cover - minimal stub
+        """Review the project schedule."""
+        pass
+
+    def complete(self):  # pragma: no cover - minimal stub
+        """Finalize the project schedule."""
+        pass
+
+    def export(self):  # pragma: no cover - minimal stub
+        """Export the schedule."""
+        pass
+
diff --git a/product_manager/built_in_products/ProjectScopeStatementProduct.py b/product_manager/built_in_products/ProjectScopeStatementProduct.py
index e69de29..51f0e47 100644
--- a/product_manager/built_in_products/ProjectScopeStatementProduct.py
+++ b/product_manager/built_in_products/ProjectScopeStatementProduct.py
@@ -0,0 +1,30 @@
+"""Project scope statement product stub."""
+
+from ..Product import Product
+
+
+class ProjectScopeStatementProduct(Product):
+    """Represents a brief statement of project scope."""
+
+    def __init__(self):
+        super().__init__(
+            name="ProjectScopeStatementProduct",
+            description="Define the scope and deliverables of the project.",
+        )
+
+    def draft(self):  # pragma: no cover - minimal stub
+        """Draft the scope statement."""
+        pass
+
+    def review(self):  # pragma: no cover - minimal stub
+        """Review the scope statement."""
+        pass
+
+    def complete(self):  # pragma: no cover - minimal stub
+        """Finalize the scope statement."""
+        pass
+
+    def export(self):  # pragma: no cover - minimal stub
+        """Export the scope statement."""
+        pass
+
diff --git a/product_manager/built_in_products/QualityManagementPlanProduct.py b/product_manager/built_in_products/QualityManagementPlanProduct.py
index e69de29..920891e 100644
--- a/product_manager/built_in_products/QualityManagementPlanProduct.py
+++ b/product_manager/built_in_products/QualityManagementPlanProduct.py
@@ -0,0 +1,30 @@
+"""Quality management plan product stub."""
+
+from ..Product import Product
+
+
+class QualityManagementPlanProduct(Product):
+    """Represents a quality management plan."""
+
+    def __init__(self):
+        super().__init__(
+            name="QualityManagementPlanProduct",
+            description="Describe quality assurance and control activities.",
+        )
+
+    def draft(self):  # pragma: no cover - minimal stub
+        """Draft the quality management plan."""
+        pass
+
+    def review(self):  # pragma: no cover - minimal stub
+        """Review the quality management plan."""
+        pass
+
+    def complete(self):  # pragma: no cover - minimal stub
+        """Finalize the quality management plan."""
+        pass
+
+    def export(self):  # pragma: no cover - minimal stub
+        """Export the quality management plan."""
+        pass
+
diff --git a/product_manager/built_in_products/ResourcePlanProduct.py b/product_manager/built_in_products/ResourcePlanProduct.py
index e69de29..3b66a63 100644
--- a/product_manager/built_in_products/ResourcePlanProduct.py
+++ b/product_manager/built_in_products/ResourcePlanProduct.py
@@ -0,0 +1,30 @@
+"""Resource plan product stub."""
+
+from ..Product import Product
+
+
+class ResourcePlanProduct(Product):
+    """Represents a basic resource plan."""
+
+    def __init__(self):
+        super().__init__(
+            name="ResourcePlanProduct",
+            description="Plan for labour and material resources required.",
+        )
+
+    def draft(self):  # pragma: no cover - minimal stub
+        """Draft the resource plan."""
+        pass
+
+    def review(self):  # pragma: no cover - minimal stub
+        """Review the resource plan."""
+        pass
+
+    def complete(self):  # pragma: no cover - minimal stub
+        """Finalize the resource plan."""
+        pass
+
+    def export(self):  # pragma: no cover - minimal stub
+        """Export the plan."""
+        pass
+
diff --git a/product_manager/built_in_products/RiskManagementPlanProduct.py b/product_manager/built_in_products/RiskManagementPlanProduct.py
index e69de29..0df76fc 100644
--- a/product_manager/built_in_products/RiskManagementPlanProduct.py
+++ b/product_manager/built_in_products/RiskManagementPlanProduct.py
@@ -0,0 +1,30 @@
+"""Risk management plan product stub."""
+
+from ..Product import Product
+
+
+class RiskManagementPlanProduct(Product):
+    """Represents a risk management plan."""
+
+    def __init__(self):
+        super().__init__(
+            name="RiskManagementPlanProduct",
+            description="Identify and plan responses to potential risks.",
+        )
+
+    def draft(self):  # pragma: no cover - minimal stub
+        """Draft the risk management plan."""
+        pass
+
+    def review(self):  # pragma: no cover - minimal stub
+        """Review the risk management plan."""
+        pass
+
+    def complete(self):  # pragma: no cover - minimal stub
+        """Finalize the risk management plan."""
+        pass
+
+    def export(self):  # pragma: no cover - minimal stub
+        """Export the plan."""
+        pass
+
diff --git a/product_manager/built_in_products/StakeholderAnalysisProduct.py b/product_manager/built_in_products/StakeholderAnalysisProduct.py
index e69de29..bbc7a70 100644
--- a/product_manager/built_in_products/StakeholderAnalysisProduct.py
+++ b/product_manager/built_in_products/StakeholderAnalysisProduct.py
@@ -0,0 +1,30 @@
+"""Stakeholder analysis product stub."""
+
+from ..Product import Product
+
+
+class StakeholderAnalysisProduct(Product):
+    """Represents a simple stakeholder analysis."""
+
+    def __init__(self):
+        super().__init__(
+            name="StakeholderAnalysisProduct",
+            description="Identify stakeholders and analyse their influence.",
+        )
+
+    def draft(self):  # pragma: no cover - minimal stub
+        """Draft the stakeholder analysis."""
+        pass
+
+    def review(self):  # pragma: no cover - minimal stub
+        """Review the stakeholder analysis."""
+        pass
+
+    def complete(self):  # pragma: no cover - minimal stub
+        """Finalize the stakeholder analysis."""
+        pass
+
+    def export(self):  # pragma: no cover - minimal stub
+        """Export the analysis."""
+        pass
+
diff --git a/product_manager/built_in_products/__init__.py b/product_manager/built_in_products/__init__.py
index e69de29..39e5698 100644
--- a/product_manager/built_in_products/__init__.py
+++ b/product_manager/built_in_products/__init__.py
@@ -0,0 +1,34 @@
+"""Collection of built-in product stubs."""
+
+from .BudgetProposalProduct import BudgetProposalProduct
+from .BusinessCaseProduct import BusinessCaseProduct
+from .CommunicationPlanProduct import CommunicationPlanProduct
+from .LegalRegulatoryReviewProduct import LegalRegulatoryReviewProduct
+from .ProcurementStrategyProduct import ProcurementStrategyProduct
+from .ProjectApprovalDocumentationProduct import ProjectApprovalDocumentationProduct
+from .ProjectCharterProduct import ProjectCharterProduct
+from .ProjectOrganisationChartProduct import ProjectOrganisationChartProduct
+from .ProjectScheduleProduct import ProjectScheduleProduct
+from .ProjectScopeStatementProduct import ProjectScopeStatementProduct
+from .QualityManagementPlanProduct import QualityManagementPlanProduct
+from .ResourcePlanProduct import ResourcePlanProduct
+from .RiskManagementPlanProduct import RiskManagementPlanProduct
+from .StakeholderAnalysisProduct import StakeholderAnalysisProduct
+
+__all__ = [
+    "BudgetProposalProduct",
+    "BusinessCaseProduct",
+    "CommunicationPlanProduct",
+    "LegalRegulatoryReviewProduct",
+    "ProcurementStrategyProduct",
+    "ProjectApprovalDocumentationProduct",
+    "ProjectCharterProduct",
+    "ProjectOrganisationChartProduct",
+    "ProjectScheduleProduct",
+    "ProjectScopeStatementProduct",
+    "QualityManagementPlanProduct",
+    "ResourcePlanProduct",
+    "RiskManagementPlanProduct",
+    "StakeholderAnalysisProduct",
+]
+