feat(agent): align the document tools with the harness-trained shape — ls, read(path), grep(pattern, path?)

tests/unit/test_llm_stream_teardown.py

@@ -39,7 +39,7 @@ def _chunk(content: str) -> SimpleNamespace:
 
 def _tool_chunk() -> SimpleNamespace:
     """One chunk carrying a malformed-arguments tool call (index 0)."""
-    fn = SimpleNamespace(name="read_document", arguments='{"source": "Homelab",')
+    fn = SimpleNamespace(name="read", arguments='{"path": "Homelab",')
     tc = SimpleNamespace(index=0, id="call_x", function=fn)
     delta = SimpleNamespace(content=None, tool_calls=[tc])
     return SimpleNamespace(choices=[SimpleNamespace(delta=delta)])
@@ -194,7 +194,7 @@ def test_llm_error_materialization_passes_through_and_closes() -> None:
     async def drain() -> None:
         async for _ in llm.chat_stream(
             [{"role": "user", "content": "q"}],
-            tools=[{"type": "function", "function": {"name": "read_document"}}],
+            tools=[{"type": "function", "function": {"name": "read"}}],
         ):
             pass