feat: add PageIndex SDK with local/cloud dual-mode support (#207)

tests/test_agent.py

@@ -0,0 +1,14 @@
+from pageindex.agent import AgentRunner, SYSTEM_PROMPT
+from pageindex.backend.protocol import AgentTools
+
+
+def test_agent_runner_init():
+    tools = AgentTools(function_tools=["mock_tool"])
+    runner = AgentRunner(tools=tools, model="gpt-4o")
+    assert runner._model == "gpt-4o"
+
+
+def test_system_prompt_has_tool_instructions():
+    assert "list_documents" in SYSTEM_PROMPT
+    assert "get_document_structure" in SYSTEM_PROMPT
+    assert "get_page_content" in SYSTEM_PROMPT