diff --git a/src/adcp/types/__init__.py b/src/adcp/types/__init__.py
index 05e30a572..ca22b447e 100644
--- a/src/adcp/types/__init__.py
+++ b/src/adcp/types/__init__.py
@@ -72,6 +72,24 @@
     "RequestProposalsRequest",
     "RequestProposalsResponse",
     "UnsupportedRefinementDimensionDetails",
+    # Structured protocol error details
+    "AccessibilityViolationDetails",
+    "AccountMovedDetails",
+    "AccountSetupRequiredDetails",
+    "ActionNotAllowedDetails",
+    "ActionNotAllowedReason",
+    "AgentPermissionDeniedDetails",
+    "AudienceTooSmallDetails",
+    "BillingNotPermittedForAgentDetails",
+    "BillingNotSupportedDetails",
+    "BudgetTooLowDetails",
+    "ConflictDetails",
+    "CreativeRejectedDetails",
+    "PolicyViolationDetails",
+    "RateLimitedDetails",
+    "StaleResponseDetails",
+    "VendorErrorCodeRegistry",
+    "VersionUnsupportedDetails",
     # A2UI types
     "A2UiComponent",
     "A2UiSurface",
@@ -1080,14 +1098,17 @@ def __dir__() -> list[str]:
         AcceptedLoss,
         AcceptProposalRequest,
         AcceptProposalResponse,
+        AccessibilityViolationDetails,
         Account,
         AccountAuthorization,
         AccountIdReference,
+        AccountMovedDetails,
         AccountReference,
         AccountReferenceById,
         AccountReferenceByNaturalKey,
         AccountResponse,
         AccountScope,
+        AccountSetupRequiredDetails,
         AccountWithAuthorization,
         AcquireRightsAcquiredResponse,
         AcquireRightsErrorResponse,
@@ -1097,6 +1118,8 @@ def __dir__() -> list[str]:
         AcquireRightsResponse,
         AcquireRightsResponse1,
         Action,
+        ActionNotAllowedDetails,
+        ActionNotAllowedReason,
         ActivateSignalErrorResponse,
         ActivateSignalRequest,
         ActivateSignalResponse,
@@ -1107,6 +1130,7 @@ def __dir__() -> list[str]:
         AgentConfig,
         AgentDeployment,
         AgentDestination,
+        AgentPermissionDeniedDetails,
         AggregatedTotals,
         AiTool,
         Artifact,
@@ -1120,6 +1144,7 @@ def __dir__() -> list[str]:
         AssignedPackage,
         Assignments,
         AudienceSource,
+        AudienceTooSmallDetails,
         AudioContent,
         AudioFormatAsset,
         AudioFormatGroupAsset,
@@ -1137,12 +1162,15 @@ def __dir__() -> list[str]:
         AvailableMetric,
         AvailablePackage,
         AvailableReportingFrequency,
+        BillingNotPermittedForAgentDetails,
+        BillingNotSupportedDetails,
         BothPreviewRender,
         BrandIdentity,
         BrandReference,
         BrandSource,
         BriefAsset,
         BriefFormatAsset,
+        BudgetTooLowDetails,
         BuildCreativeCreative,
         BusinessEntity,
         BusinessEntityResponse,
@@ -1209,6 +1237,7 @@ def __dir__() -> list[str]:
         ComplyTestControllerRequest,
         ComplyTestControllerResponse,
         ComplyTestControllerResponse1,
+        ConflictDetails,
         ConsentBasis,
         Contact,
         ContentIdType,
@@ -1260,6 +1289,7 @@ def __dir__() -> list[str]:
         CreativeFilters,
         CreativeManifest,
         CreativePolicy,
+        CreativeRejectedDetails,
         CreativeStatus,
         CreativeVariant,
         CreditLimit,
@@ -1571,6 +1601,7 @@ def __dir__() -> list[str]:
         PolicyHistory,
         PolicyRevision,
         PolicySummary,
+        PolicyViolationDetails,
         PostalArea,
         PreviewOutputFormat,
         PreviewRender,
@@ -1631,6 +1662,7 @@ def __dir__() -> list[str]:
         PushNotificationConfig,
         QuartileData,
         QuerySummary,
+        RateLimitedDetails,
         ReachUnit,
         RealEstateUnit,
         Recovery,
@@ -1712,6 +1744,7 @@ def __dir__() -> list[str]:
         SortApplied,
         SortDirection,
         Source,
+        StaleResponseDetails,
         Status,
         StatusSummary,
         SyncAccountsAccount,
@@ -1837,6 +1870,7 @@ def __dir__() -> list[str]:
         VcpmFixedRatePricingOption,
         VcpmPricingOption,
         VehicleUnit,
+        VendorErrorCodeRegistry,
         VendorPricingOptionUnion,
         VenueBreakdownItem,
         VerifyBrandClaimPayload,
@@ -1852,6 +1886,7 @@ def __dir__() -> list[str]:
         VerifyBrandClaimsResponseBulk,
         VerifyBrandClaimsSignedResponse,
         VerifyBrandClaimsSignedSuccessPayload,
+        VersionUnsupportedDetails,
         VideoContent,
         VideoFormatAsset,
         VideoFormatGroupAsset,
diff --git a/src/adcp/types/_eager.py b/src/adcp/types/_eager.py
index f2bb2c0bb..e96facdf3 100644
--- a/src/adcp/types/_eager.py
+++ b/src/adcp/types/_eager.py
@@ -48,17 +48,23 @@
     AcceptedLoss,
     AcceptProposalRequest,
     AcceptProposalResponse,
+    AccessibilityViolationDetails,
     Account,
     AccountAuthorization,
+    AccountMovedDetails,
     AccountReference,
     AccountScope,
+    AccountSetupRequiredDetails,
     AccountWithAuthorization,
     AcquireRightsRequest,
     AcquireRightsResponse,
+    ActionNotAllowedDetails,
+    ActionNotAllowedReason,
     ActivateSignalRequest,
     ActivateSignalResponse,
     AdcpProtocol,
     AdvertiserIndustry,
+    AgentPermissionDeniedDetails,
     AggregatedTotals,
     AiTool,
     Artifact,
@@ -67,13 +73,17 @@
     AssignedPackage,
     Assignments,
     AudienceSource,
+    AudienceTooSmallDetails,
     Authentication,
     AuthenticationScheme,
     AuthorizationRequiredDetails,
     AuthorizedAgents,
     AvailableMetric,
     AvailablePackage,
+    BillingNotPermittedForAgentDetails,
+    BillingNotSupportedDetails,
     BrandReference,
+    BudgetTooLowDetails,
     BusinessEntity,
     BuyingMode,
     BuyProductsRequest,
@@ -99,6 +109,7 @@
     CompatibilityPurchaseCoordinatorInput,
     ComplyTestControllerRequest,
     ComplyTestControllerResponse,
+    ConflictDetails,
     Contact,
     ContentIdType,
     ContentStandards,
@@ -126,6 +137,7 @@
     CreativeApprovalStatus,
     CreativeAssignment,
     CreativePolicy,
+    CreativeRejectedDetails,
     CreativeStatus,
     CreditLimit,
     DaastTrackingEvent,
@@ -260,6 +272,7 @@
     PlacementPresentationDocument,
     PlacementPresentationReference,
     PlacementReference,
+    PolicyViolationDetails,
     PostalArea,
     PreviewOutputFormat,
     PreviewRender,
@@ -289,6 +302,7 @@
     PushNotificationConfig,
     QuartileData,
     QuerySummary,
+    RateLimitedDetails,
     ReachUnit,
     ReferenceRenderer,
     Refine,
@@ -348,6 +362,7 @@
     Sort,
     SortApplied,
     SortDirection,
+    StaleResponseDetails,
     StatusSummary,
     SyncAccountsRequest,
     SyncAccountsResponse,
@@ -394,6 +409,7 @@
     VastTrackingEvent,
     VastVersion,
     VcpmPricingOption,
+    VendorErrorCodeRegistry,
     VenueBreakdownItem,
     VerifyBrandClaimPayload,
     VerifyBrandClaimRequest,
@@ -408,6 +424,7 @@
     VerifyBrandClaimsResponseBulk,
     VerifyBrandClaimsSignedResponse,
     VerifyBrandClaimsSignedSuccessPayload,
+    VersionUnsupportedDetails,
     ViewThreshold,
     WcagLevel,
     WebhookChallenge,
@@ -1014,6 +1031,24 @@ def __init__(self, *args: object, **kwargs: object) -> None:
     "RequestProposalsRequest",
     "RequestProposalsResponse",
     "UnsupportedRefinementDimensionDetails",
+    # Structured protocol error details
+    "AccessibilityViolationDetails",
+    "AccountMovedDetails",
+    "AccountSetupRequiredDetails",
+    "ActionNotAllowedDetails",
+    "ActionNotAllowedReason",
+    "AgentPermissionDeniedDetails",
+    "AudienceTooSmallDetails",
+    "BillingNotPermittedForAgentDetails",
+    "BillingNotSupportedDetails",
+    "BudgetTooLowDetails",
+    "ConflictDetails",
+    "CreativeRejectedDetails",
+    "PolicyViolationDetails",
+    "RateLimitedDetails",
+    "StaleResponseDetails",
+    "VendorErrorCodeRegistry",
+    "VersionUnsupportedDetails",
     "A2UiComponent",
     "A2UiSurface",
     "Account",
diff --git a/tests/fixtures/public_api_snapshot.json b/tests/fixtures/public_api_snapshot.json
index 80f995d46..ab2841562 100644
--- a/tests/fixtures/public_api_snapshot.json
+++ b/tests/fixtures/public_api_snapshot.json
@@ -618,14 +618,17 @@
     "AcceptProposalRequest",
     "AcceptProposalResponse",
     "AcceptedLoss",
+    "AccessibilityViolationDetails",
     "Account",
     "AccountAuthorization",
     "AccountIdReference",
+    "AccountMovedDetails",
     "AccountReference",
     "AccountReferenceById",
     "AccountReferenceByNaturalKey",
     "AccountResponse",
     "AccountScope",
+    "AccountSetupRequiredDetails",
     "AccountWithAuthorization",
     "AcquireRightsAcquiredResponse",
     "AcquireRightsErrorResponse",
@@ -635,6 +638,8 @@
     "AcquireRightsResponse",
     "AcquireRightsResponse1",
     "Action",
+    "ActionNotAllowedDetails",
+    "ActionNotAllowedReason",
     "ActivateSignalErrorResponse",
     "ActivateSignalRequest",
     "ActivateSignalResponse",
@@ -645,6 +650,7 @@
     "AgentConfig",
     "AgentDeployment",
     "AgentDestination",
+    "AgentPermissionDeniedDetails",
     "AggregatedTotals",
     "AiTool",
     "Artifact",
@@ -658,6 +664,7 @@
     "AssignedPackage",
     "Assignments",
     "AudienceSource",
+    "AudienceTooSmallDetails",
     "AudioContent",
     "AudioFormatAsset",
     "AudioFormatGroupAsset",
@@ -675,12 +682,15 @@
     "AvailableMetric",
     "AvailablePackage",
     "AvailableReportingFrequency",
+    "BillingNotPermittedForAgentDetails",
+    "BillingNotSupportedDetails",
     "BothPreviewRender",
     "BrandIdentity",
     "BrandReference",
     "BrandSource",
     "BriefAsset",
     "BriefFormatAsset",
+    "BudgetTooLowDetails",
     "BuildCreativeCreative",
     "BusinessEntity",
     "BusinessEntityResponse",
@@ -747,6 +757,7 @@
     "ComplyTestControllerRequest",
     "ComplyTestControllerResponse",
     "ComplyTestControllerResponse1",
+    "ConflictDetails",
     "ConsentBasis",
     "Contact",
     "ContentIdType",
@@ -798,6 +809,7 @@
     "CreativeFilters",
     "CreativeManifest",
     "CreativePolicy",
+    "CreativeRejectedDetails",
     "CreativeStatus",
     "CreativeVariant",
     "CreditLimit",
@@ -1109,6 +1121,7 @@
     "PolicyHistory",
     "PolicyRevision",
     "PolicySummary",
+    "PolicyViolationDetails",
     "PostalArea",
     "PreviewOutputFormat",
     "PreviewRender",
@@ -1169,6 +1182,7 @@
     "PushNotificationConfig",
     "QuartileData",
     "QuerySummary",
+    "RateLimitedDetails",
     "ReachUnit",
     "RealEstateUnit",
     "Recovery",
@@ -1250,6 +1264,7 @@
     "SortApplied",
     "SortDirection",
     "Source",
+    "StaleResponseDetails",
     "Status",
     "StatusSummary",
     "SyncAccountsAccount",
@@ -1375,6 +1390,7 @@
     "VcpmFixedRatePricingOption",
     "VcpmPricingOption",
     "VehicleUnit",
+    "VendorErrorCodeRegistry",
     "VendorPricingOptionUnion",
     "VenueBreakdownItem",
     "VerifyBrandClaimPayload",
@@ -1390,6 +1406,7 @@
     "VerifyBrandClaimsResponseBulk",
     "VerifyBrandClaimsSignedResponse",
     "VerifyBrandClaimsSignedSuccessPayload",
+    "VersionUnsupportedDetails",
     "VideoContent",
     "VideoFormatAsset",
     "VideoFormatGroupAsset",
diff --git a/tests/test_public_api.py b/tests/test_public_api.py
index 43acc86db..2a3c0a010 100644
--- a/tests/test_public_api.py
+++ b/tests/test_public_api.py
@@ -112,6 +112,36 @@ def test_request_response_types_are_exported():
         assert hasattr(adcp, type_name), f"{type_name} not exported from adcp package"
 
 
+def test_structured_error_details_are_exported():
+    """Every generated error-detail model is available from ``adcp.types``."""
+    from adcp import types
+
+    error_detail_types = [
+        "AccessibilityViolationDetails",
+        "AccountMovedDetails",
+        "AccountSetupRequiredDetails",
+        "ActionNotAllowedDetails",
+        "ActionNotAllowedReason",
+        "AgentPermissionDeniedDetails",
+        "AudienceTooSmallDetails",
+        "AuthorizationRequiredDetails",
+        "BillingNotPermittedForAgentDetails",
+        "BillingNotSupportedDetails",
+        "BudgetTooLowDetails",
+        "ConflictDetails",
+        "CreativeRejectedDetails",
+        "PolicyViolationDetails",
+        "RateLimitedDetails",
+        "StaleResponseDetails",
+        "UnsupportedRefinementDimensionDetails",
+        "VendorErrorCodeRegistry",
+        "VersionUnsupportedDetails",
+    ]
+
+    for type_name in error_detail_types:
+        assert getattr(types, type_name).__name__ == type_name
+
+
 def test_pricing_option_types_are_exported():
     """All pricing option types are accessible from main package."""
     import adcp