chore: import upstream snapshot with attribution

tests/agents/test_workflow_template.py

@@ -0,0 +1,63 @@
+from types import SimpleNamespace
+
+from application.agents.workflows.schemas import Workflow, WorkflowGraph
+from application.agents.workflows.workflow_engine import WorkflowEngine
+
+
+def create_engine() -> WorkflowEngine:
+    graph = WorkflowGraph(workflow=Workflow(name="Template Test"), nodes=[], edges=[])
+    agent = SimpleNamespace(
+        user="user-1",
+        request_id="req-1",
+        retrieved_docs=[
+            {"title": "Doc A", "text": "Summary A"},
+            {"title": "Doc B", "text": "Summary B"},
+        ],
+    )
+    return WorkflowEngine(graph, agent)
+
+
+def test_workflow_template_supports_agent_namespace_and_legacy_variables():
+    engine = create_engine()
+    engine.state = {"query": "Hello", "chat_history": "[]", "ticket_id": 42}
+
+    rendered = engine._format_template(
+        "{{ agent.query }}|{{ agent.ticket_id }}|{{ query }}|{{ ticket_id }}"
+    )
+
+    assert rendered == "Hello|42|Hello|42"
+
+
+def test_workflow_template_supports_global_namespaces():
+    engine = create_engine()
+    engine.state = {"query": "Hello"}
+
+    rendered = engine._format_template(
+        "{{ source.count }}|{{ source.summaries }}|{{ system.request_id }}"
+    )
+
+    assert rendered.startswith("2|")
+    assert "Doc A" in rendered
+    assert "Summary A" in rendered
+    assert rendered.endswith("|req-1")
+
+
+def test_workflow_template_handles_namespace_conflicts_with_agent_prefix():
+    engine = create_engine()
+    engine.state = {"source": "user-defined-source"}
+
+    rendered = engine._format_template(
+        "{{ agent.source }}|{{ agent_source }}|{{ source.count }}"
+    )
+
+    assert rendered.startswith("user-defined-source|user-defined-source|")
+
+
+def test_workflow_template_gracefully_handles_invalid_template_syntax():
+    engine = create_engine()
+    engine.state = {"query": "Hello"}
+
+    invalid_template = "{{ agent.query "
+    rendered = engine._format_template(invalid_template)
+
+    assert rendered == invalid_template