feat(tasks): add skill-templated task graph execution

app-instance/backend/tests/unit/test_main_agent_router.py

@@ -158,7 +158,7 @@ def test_router_receives_thinking_mode() -> None:
     provider = RouterProvider('{"action":"simple_chat","reason":"simple"}')
     decision = asyncio.run(
         MainAgentRouter().classify(
-            "你好",
+            "请判断一下这个概念是否合理",
             provider=provider,
             thinking_enabled=False,
         )
@@ -168,11 +168,84 @@ def test_router_receives_thinking_mode() -> None:
     assert provider.calls[0]["thinking_enabled"] is False
 
 
+def test_router_fast_paths_obvious_simple_chat_without_provider_call() -> None:
+    provider = RouterProvider('{"action":"new_task","reason":"should not be used"}')
+
+    decision = asyncio.run(MainAgentRouter().classify("你好", provider=provider))
+    punctuated = asyncio.run(MainAgentRouter().classify("你好！", provider=provider))
+    translation = asyncio.run(MainAgentRouter().classify("翻译这句话：hello world", provider=provider))
+
+    assert not decision.is_task
+    assert decision.action == "simple_chat"
+    assert decision.reason == "obvious_simple_chat"
+    assert not punctuated.is_task
+    assert punctuated.action == "simple_chat"
+    assert not translation.is_task
+    assert translation.action == "simple_chat"
+    assert provider.calls == []
+
+
+def test_router_sends_broad_explanations_to_intent_llm() -> None:
+    provider = RouterProvider('{"action":"simple_chat","reason":"intent decided concept explanation"}')
+
+    explanation = asyncio.run(MainAgentRouter().classify("解释一下什么是 MCP", provider=provider))
+    definition = asyncio.run(MainAgentRouter().classify("什么是 context engineering", provider=provider))
+
+    assert not explanation.is_task
+    assert explanation.reason == "intent decided concept explanation"
+    assert not definition.is_task
+    assert definition.reason == "intent decided concept explanation"
+    assert len(provider.calls) == 2
+
+
+def test_router_fast_paths_obvious_task_without_provider_call() -> None:
+    provider = RouterProvider('{"action":"simple_chat","reason":"should not be used"}')
+
+    decision = asyncio.run(MainAgentRouter().classify("帮我查一下今天深圳天气", provider=provider))
+    current_event = asyncio.run(
+        MainAgentRouter().classify("解释一下今天法国队在世界杯的表现为什么那么好", provider=provider)
+    )
+
+    assert decision.is_task
+    assert decision.action == "create_task"
+    assert decision.reason == "obvious_task"
+    assert current_event.is_task
+    assert current_event.action == "create_task"
+    assert provider.calls == []
+
+
+def test_router_does_not_simple_fast_path_current_event_explanations() -> None:
+    provider = RouterProvider('{"action":"simple_chat","reason":"llm fallback"}')
+
+    decision = asyncio.run(MainAgentRouter().classify("解释一下昨晚法国队在世界杯的表现为什么那么好", provider=provider))
+
+    assert decision.is_task
+    assert decision.action == "create_task"
+    assert decision.reason == "obvious_task"
+    assert provider.calls == []
+
+
+def test_router_keeps_active_task_followups_in_llm_path() -> None:
+    provider = RouterProvider('{"action":"revise_task","reason":"needs revision","short_title":"任务连续性"}')
+
+    decision = asyncio.run(
+        MainAgentRouter().classify(
+            "这个也加上",
+            active_task=_task(),
+            provider=provider,
+        )
+    )
+
+    assert decision.is_task
+    assert decision.action == "revise_task"
+    assert len(provider.calls) == 1
+
+
 def test_router_injects_intent_skill_guidance() -> None:
     provider = RouterProvider('{"action":"new_task","reason":"needs weather tool","short_title":"珠海天气"}')
     decision = asyncio.run(
         MainAgentRouter().classify(
-            "帮我查一下今天珠海天气",
+            "帮我判断这个需求要不要进入任务模式",
             provider=provider,
             intent_skill="Weather and current external data must be routed to new_task.",
         )
@@ -247,7 +320,7 @@ def test_router_retries_once_after_provider_failure() -> None:
 
     decision = asyncio.run(
         MainAgentRouter().classify(
-            "帮我看看昨天的中美会面都谈了什么？",
+            "帮我判断这次中美会面分析需求要不要进入任务模式",
             provider=provider,
         )
     )
@@ -262,7 +335,7 @@ def test_router_fallback_after_two_provider_failures() -> None:
 
     decision = asyncio.run(
         MainAgentRouter().classify(
-            "帮我看看昨天的中美会面都谈了什么？",
+            "帮我判断这次中美会面分析需求要不要进入任务模式",
             provider=provider,
         )
     )