refactor(pifs): remove legacy command prompt filter

pageindex/filesystem/agent.py

@@ -124,15 +124,6 @@ Tool policy:
 - Distinguish default/register metadata from caller-provided custom metadata when the evidence supports it.
 """
 
-LEGACY_SEMANTIC_COMMAND_SURFACE_TERMS = (
-    "search-summary",
-    "search-entity",
-    "search-relation",
-    "semantic-grep",
-    "find --name",
-    "find --relation",
-)
-
 STREAM_MODE_ALIASES = {
     "": "off",
     "none": "off",
@@ -273,16 +264,6 @@ def compact_tool_output_preview(
     return preview
 
 
-def agent_visible_command_surface(executor: PIFSCommandExecutor) -> str:
-    """Hide legacy semantic command hints from ask/chat default instructions."""
-    lines = []
-    for line in executor.describe_available_command_surfaces().splitlines():
-        if any(term in line for term in LEGACY_SEMANTIC_COMMAND_SURFACE_TERMS):
-            continue
-        lines.append(line)
-    return "\n".join(lines)
-
-
 def build_agent_initial_context(
     filesystem: PageIndexFileSystem,
     *,
@@ -312,7 +293,7 @@ def build_agent_initial_context(
                 ensure_ascii=False,
             ),
             "Workspace retrieval capabilities:",
-            agent_visible_command_surface(executor),
+            executor.describe_available_command_surfaces(),
         ]
     )
 

tests/test_pifs_agent_stream.py

@@ -273,28 +273,6 @@ class PIFSAgentStreamTest(unittest.TestCase):
         self.assertIn("cat <path> --structure", demo_prompt)
         self.assertNotIn("search-summary", demo_prompt)
 
-    def test_built_agent_instructions_filter_legacy_semantic_command_surface(self):
-        class LegacySemanticBackend:
-            semantic_tool_channels = ("summary", "entity", "relation")
-
-        with tempfile.TemporaryDirectory() as workspace:
-            filesystem = PageIndexFileSystem(
-                workspace,
-                semantic_retrieval_backend=LegacySemanticBackend(),
-            )
-            instructions = build_pifs_agent_instructions(filesystem)
-
-        self.assertIn('browse [-R] <folder> "<query>"', instructions)
-        for old_command in (
-            "search-summary",
-            "search-entity",
-            "search-relation",
-            "semantic-grep",
-            "find --name",
-            "find --relation",
-        ):
-            self.assertNotIn(old_command, instructions)
-
     def test_prompt_rejects_find_grep_as_exhaustive_search(self):
         self.assertIn("Do not use find | grep as an exhaustive search", AGENT_TOOL_POLICY)
         self.assertIn("find output can be scoped or limited", AGENT_TOOL_POLICY)