fix(filesystem): restore summary vector search in cli

tests/test_pageindex_filesystem_scope.py

@@ -58,3 +58,60 @@ def test_semantic_search_scope_filters_explicit_source_type_facets():
         {"folder_path": "/documents"}
     ) == {}
 
+
+def test_existing_summary_projection_index_configures_retrieval_backend(tmp_path, monkeypatch):
+    from pageindex.filesystem import PageIndexFileSystem
+    from pageindex.filesystem.semantic_index import SemanticIndexRecord, SQLiteVecSemanticIndex
+
+    workspace = tmp_path / "workspace"
+    index_dir = workspace / "artifacts" / "projection_indexes"
+    summary_index = SQLiteVecSemanticIndex(index_dir / "summary_only_vector.sqlite")
+    summary_index.reset(
+        dimension=3,
+        metadata={
+            "channel": "summary",
+            "embedding_provider": "openai",
+            "embedding_model": "test-embedding",
+            "embedding_dimensions": 3,
+        },
+    )
+    summary_index.upsert_many(
+        [
+            SemanticIndexRecord(
+                file_ref="file_a",
+                external_id="doc_a",
+                source_type="documents",
+                source_path="documents/a.pdf",
+                title="A",
+                text="summary",
+                vector=[1.0, 0.0, 0.0],
+            )
+        ]
+    )
+    filesystem = PageIndexFileSystem(workspace)
+    calls = []
+
+    def fake_configure(index_dir_arg, **kwargs):
+        calls.append((index_dir_arg, kwargs))
+        filesystem.semantic_retrieval_backend = SummaryBackend("doc_a")
+        return filesystem.semantic_retrieval_backend
+
+    monkeypatch.setattr(
+        filesystem,
+        "configure_hybrid_projection_retrieval",
+        fake_configure,
+    )
+
+    assert filesystem.configure_existing_projection_retrieval() is True
+    assert calls == [
+        (
+            filesystem.summary_projection_index_dir,
+            {
+                "embedding_provider": "openai",
+                "embedding_model": "test-embedding",
+                "embedding_dimensions": 3,
+                "embedding_timeout": 60,
+            },
+        )
+    ]
+    assert filesystem.semantic_retrieval_channels() == ("summary",)

tests/test_pifs_agent_stream.py

@@ -204,6 +204,11 @@ class PIFSAgentStreamTest(unittest.TestCase):
         self.assertIn("do not infer metadata presence or absence", AGENT_TOOL_POLICY)
         self.assertIn("questions about metadata fields", BASH_TOOL_DESCRIPTION)
 
+    def test_prompt_routes_summary_search_to_search_summary(self):
+        self.assertIn("search-summary when the user asks for", BASH_TOOL_DESCRIPTION)
+        self.assertIn("use search-summary <query> <folder>", AGENT_TOOL_POLICY)
+        self.assertIn("do not translate that request into find --where", AGENT_TOOL_POLICY)
+
     def test_system_prompt_sets_workspace_identity_and_scope(self):
         self.assertIn("PageIndex FileSystem Demo Agent", AGENT_SYSTEM_PROMPT)
         self.assertIn("VectifyAI Team", AGENT_SYSTEM_PROMPT)

tests/test_pifs_cli.py

@@ -5,6 +5,24 @@ from pathlib import Path
 class FakeFileSystem:
     def __init__(self, workspace):
         self.workspace = Path(workspace)
+        self.projection_retrieval_configured = False
+
+    def configure_existing_projection_retrieval(self):
+        self.projection_retrieval_configured = True
+        return True
+
+
+def test_cli_workspace_configures_existing_projection_retrieval(monkeypatch, tmp_path):
+    from pageindex.filesystem import cli
+
+    workspace = tmp_path / "workspace"
+
+    monkeypatch.setattr(cli, "PageIndexFileSystem", FakeFileSystem)
+
+    filesystem = cli._filesystem_from_workspace(str(workspace))
+
+    assert filesystem.workspace == workspace
+    assert filesystem.projection_retrieval_configured is True
 
 
 def test_cli_passthrough_invokes_pifs_command_executor(monkeypatch, capsys, tmp_path):