declarative Markdown workflow layer

tests/test_builtin_extension_catalog.py

@@ -13,6 +13,7 @@ def test_builtin_extension_registry_lists_query_processors_and_backend():
     assert "processor.uppercase" in ids
     assert "processor.include" in ids
     assert "backend.local-sqlite" in ids
+    assert "workflow.markdown-dataflow" in ids
 
 
 def test_builtin_processor_descriptors_capture_safety_and_provenance():
@@ -48,3 +49,18 @@ def test_builtin_local_sqlite_descriptor_exposes_backend_capabilities():
         "mkt cache query",
         "mkt search",
     ]
+
+
+def test_builtin_workflow_descriptor_exposes_cli_and_safety():
+    registry = builtin_extension_registry()
+
+    descriptor = registry.get("workflow.markdown-dataflow")
+
+    assert descriptor.kind == "workflow-engine"
+    assert descriptor.safety["writes_output_files"] is True
+    assert descriptor.safety["assisted_generation"] == "adapter-only"
+    assert descriptor.cli["commands"] == [
+        "mkt workflow inspect",
+        "mkt workflow plan",
+        "mkt workflow run",
+    ]