diff --git a/backend/app/modules/scanner/domain/entities.py b/backend/app/modules/scanner/domain/entities.py
index e69de29..8b93918 100644
--- a/backend/app/modules/scanner/domain/entities.py
+++ b/backend/app/modules/scanner/domain/entities.py
@@ -0,0 +1,102 @@
+from dataclasses import dataclass, field
+from datetime import datetime
+
+from app.modules.design.domain.entities import (
+    ADR,
+    ApiContract,
+    Capability,
+    ChangeLogEntry,
+    CodebaseAlignment,
+    DataFlow,
+    DataSecurity,
+    DesignDocument,
+    Domain,
+    DomainEntity,
+    DomainModule,
+    Entity,
+    Environment,
+    ExternalSystem,
+    Integration,
+    Module,
+    ModuleBoundaryRule,
+    OperationalBaseline,
+    ReleasePlan,
+    RuntimeComponent,
+    RuntimeTopology,
+    Scenario,
+    SharedTerm,
+    ScopeAndGoals,
+    SolutionLayer,
+    SystemContext,
+    TechSelection,
+    TraceabilityLink,
+    UbiquitousTerm,
+    UserJourney,
+    ValueFlow,
+)
+from app.modules.design.domain.value_objects import FileStatus
+
+
+@dataclass
+class FileStatusEntry:
+    path: str
+    status: FileStatus
+    content_lines: int
+
+
+@dataclass
+class ScanSummary:
+    total_files: int
+    ok: int
+    sparse: int
+    missing: int
+    placeholder_heavy: int
+    template_residue: int
+
+
+@dataclass
+class ScanResult:
+    """Internal domain object carrying all parsed entities.
+
+    API response (ScanResultResponse) only includes project_id, scanned_at,
+    file_statuses, summary. Entity data is exposed through separate
+    /entities/* endpoints.
+    """
+
+    project_id: str
+    scanned_at: datetime
+    file_statuses: list[FileStatusEntry]
+    summary: ScanSummary
+    # All parsed Design entities
+    capabilities: list[Capability] = field(default_factory=list)
+    modules: list[Module] = field(default_factory=list)
+    entities: list[Entity] = field(default_factory=list)
+    value_flows: list[ValueFlow] = field(default_factory=list)
+    user_journeys: list[UserJourney] = field(default_factory=list)
+    integrations: list[Integration] = field(default_factory=list)
+    data_flows: list[DataFlow] = field(default_factory=list)
+    traceability_links: list[TraceabilityLink] = field(default_factory=list)
+    external_systems: list[ExternalSystem] = field(default_factory=list)
+    runtime_components: list[RuntimeComponent] = field(default_factory=list)
+    tech_selections: list[TechSelection] = field(default_factory=list)
+    environments: list[Environment] = field(default_factory=list)
+    design_documents: list[DesignDocument] = field(default_factory=list)
+    change_log_entries: list[ChangeLogEntry] = field(default_factory=list)
+    adrs: list[ADR] = field(default_factory=list)
+    shared_terms: list[SharedTerm] = field(default_factory=list)
+    domains: list[Domain] = field(default_factory=list)
+    ubiquitous_terms: list[UbiquitousTerm] = field(default_factory=list)
+    scenarios: list[Scenario] = field(default_factory=list)
+    domain_modules: list[DomainModule] = field(default_factory=list)
+    domain_entities: list[DomainEntity] = field(default_factory=list)
+    data_securities: list[DataSecurity] = field(default_factory=list)
+    codebase_alignments: list[CodebaseAlignment] = field(default_factory=list)
+    api_contracts: list[ApiContract] = field(default_factory=list)
+    # MD file-specific (singleton or None)
+    scope_and_goals: ScopeAndGoals | None = None
+    system_context: SystemContext | None = None
+    solution_layer: SolutionLayer | None = None
+    module_boundary_rule: ModuleBoundaryRule | None = None
+    runtime_topology: RuntimeTopology | None = None
+    operational_baseline: OperationalBaseline | None = None
+    release_plan: ReleasePlan | None = None