feat: expose authoring contract inventory

src/wf_transport_rpc_http/client/drafts.py

@@ -5,6 +5,7 @@ from typing import Any, Literal, cast
 
 from wf_api import CapabilityStepUpdate
 from wf_api.models import (
+    AuthoringContractInventoryPayload,
     CompileDraftWorkspaceResult,
     CreateArtifactFromWorkspaceResult,
     CreateDraftWorkspaceFromCapabilityResult,
@@ -76,6 +77,25 @@ class RpcDraftClientMixin:
             {"workspace_id": workspace_id, "include_draft": include_draft},
         )
 
+    async def inspect_draft_authoring_contract(
+        self: RpcCaller,
+        *,
+        workspace_id: str,
+        revision: int,
+        selected_step_id: str | None = None,
+    ) -> AuthoringContractInventoryPayload | DraftWorkspaceResult:
+        return cast(
+            AuthoringContractInventoryPayload | DraftWorkspaceResult,
+            await self._call(
+                "workflow.draft_workspaces.inspect_authoring_contract",
+                {
+                    "workspace_id": workspace_id,
+                    "revision": revision,
+                    "selected_step_id": selected_step_id,
+                },
+            ),
+        )
+
     async def create_draft_workspace_from_capability(
         self: RpcCaller,
         *,

src/wf_transport_rpc_http/methods/drafts.py

@@ -7,6 +7,7 @@ while registering nested handlers for response validation and OpenRPC output.
 import fastapi_jsonrpc as jsonrpc
 
 from wf_api.models import (
+    AuthoringContractInventoryPayload,
     CompileDraftWorkspaceResult,
     CreateArtifactFromWorkspaceResult,
     CreateDraftWorkspaceFromCapabilityResult,
@@ -33,6 +34,7 @@ from ..models import (
     DeleteDraftWorkspaceParams,
     GetDraftWorkspaceParams,
     HandleDraftParams,
+    InspectDraftAuthoringContractParams,
     ListDraftWorkspacesParams,
     PatchDraftParams,
     PatchDraftWorkspaceParams,
@@ -113,6 +115,22 @@ def register_methods(
         except (ValueError, KeyError, LookupError, FileNotFoundError) as exc:
             raise_workflow_rpc_error(exc)
 
+    @entrypoint.method(
+        name="workflow.draft_workspaces.inspect_authoring_contract",
+        errors=[WorkflowRpcError],
+    )
+    async def workflow_draft_workspaces_inspect_authoring_contract(
+        params: InspectDraftAuthoringContractParams = RpcParams(),
+    ) -> AuthoringContractInventoryPayload | DraftWorkspaceResult:
+        try:
+            return await server.api.inspect_draft_authoring_contract(
+                workspace_id=params.workspace_id,
+                revision=params.revision,
+                selected_step_id=params.selected_step_id,
+            )
+        except (ValueError, KeyError, LookupError, FileNotFoundError) as exc:
+            raise_workflow_rpc_error(exc)
+
     @entrypoint.method(
         name="workflow.draft_workspaces.create_from_capability",
         errors=[WorkflowRpcError],

src/wf_transport_rpc_http/models.py

@@ -147,6 +147,12 @@ class GetDraftWorkspaceParams(RpcParamsModel):
     include_draft: bool = False
 
 
+class InspectDraftAuthoringContractParams(RpcParamsModel):
+    workspace_id: str = Field(min_length=1)
+    revision: int = Field(ge=1)
+    selected_step_id: str | None = Field(default=None, min_length=1)
+
+
 class PatchDraftWorkspaceParams(RpcParamsModel):
     workspace_id: str = Field(min_length=1)
     revision: int = Field(ge=1)