feat(aggregation): Implement sub-agent summarization pass

tests/test_subagent_summarization.py

@@ -0,0 +1,47 @@
+import pytest
+from unittest.mock import MagicMock, patch
+from src import ai_client
+from src import summarize
+from pathlib import Path
+
+def test_run_subagent_summarization_gemini():
+ with patch("src.ai_client._provider", "gemini"), \
+      patch("src.ai_client._gemini_client") as mock_client, \
+      patch("src.ai_client._ensure_gemini_client"):
+  mock_resp = MagicMock()
+  mock_resp.text = "Smart Summary"
+  mock_client.models.generate_content.return_value = mock_resp
+  
+  res = ai_client.run_subagent_summarization("test.py", "print('hello')", True, "Outline")
+  assert res == "Smart Summary"
+  mock_client.models.generate_content.assert_called_once()
+
+def test_run_subagent_summarization_anthropic():
+ with patch("src.ai_client._provider", "anthropic"), \
+      patch("src.ai_client._anthropic_client") as mock_client, \
+      patch("src.ai_client._ensure_anthropic_client"):
+  mock_resp = MagicMock()
+  mock_block = MagicMock()
+  mock_block.text = "Anthropic Summary"
+  mock_resp.content = [mock_block]
+  mock_client.messages.create.return_value = mock_resp
+  
+  res = ai_client.run_subagent_summarization("test.py", "print('hello')", True, "Outline")
+  assert res == "Anthropic Summary"
+  mock_client.messages.create.assert_called_once()
+
+def test_summarise_file_integration():
+ with patch("src.ai_client.run_subagent_summarization") as mock_run:
+  mock_run.return_value = "Smart AI Summary"
+  
+  # Ensure we don't hit the real cache for this test
+  with patch("src.summarize._summary_cache") as mock_cache:
+   mock_cache.get_summary.return_value = None
+   
+   p = Path("test_file.py")
+   content = "def hello():\n pass"
+   summary = summarize.summarise_file(p, content)
+   
+   assert "Smart AI Summary" in summary
+   assert "**Outline:**" in summary
+   assert "functions: hello" in summary