ci/lint: ruff format pass and fix compact seed test typing

Apply pending ruff format; narrow AssistantChatMessage.content before
membership checks so basedpyright accepts Unset|None unions.

tests/test_agent/test_compact.py

@@ -96,9 +96,7 @@ def test_compact_disabled_when_max_tokens_zero() -> None:
         ToolChatMessage(content="x" * 500, tool_call_id="1"),
     ]
     out = compact_messages_for_request(messages, max_tokens=0)
-    assert out[0] is messages[0] or (
-        isinstance(out[0], ToolChatMessage) and out[0].content == "x" * 500
-    )
+    assert out[0] is messages[0] or (isinstance(out[0], ToolChatMessage) and out[0].content == "x" * 500)
 
 
 def test_measure_messages_tokens_calibrates_to_api_hint() -> None:

tests/test_agent/test_compact_summarize.py

@@ -53,8 +53,10 @@ def test_build_compacted_seed_messages() -> None:
     assert isinstance(seed[0], SystemChatMessage)
     assert seed[0].content == "sys"
     assert isinstance(seed[1], AssistantChatMessage)
-    assert "summary text" in seed[1].content
-    assert "session 3" in seed[1].content
+    content = seed[1].content
+    assert isinstance(content, str)
+    assert "summary text" in content
+    assert "session 3" in content
 
 
 class SummaryClient:

tests/test_agent/test_loop.py

@@ -617,7 +617,6 @@ async def test_retry_after_resume_orphan_user() -> None:
     await store.close()
 
 
-
 async def test_chat_agent_system_prompt_prepended() -> None:
     from plyngent.lmproto.openai_compatible.model import SystemChatMessage