Add explicit trade sizing

tests/test_agent_tools.py

@@ -80,6 +80,33 @@ async def test_open_trade_uses_all_available_buying_power_and_allows_repeated_en
         await database.close()
 
 
+async def test_open_trade_accepts_explicit_quote_notional(tmp_path):
+    database = Database(tmp_path / "state.db")
+    await database.open()
+    bybit = FakeBybit()
+    tools = AgentTools(make_config(database.path), database, bybit)  # type: ignore[arg-type]
+    run_id = await database.start_run("test")
+    try:
+        result = await tools.open_trade(
+            "linear",
+            "BTCUSDT",
+            "Buy",
+            "Market",
+            90,
+            "sized entry",
+            take_profit=120,
+            leverage=3,
+            quote_notional=5000,
+            context={"run_id": run_id},
+        )
+
+        assert result["quantity"] == "50"
+        assert result["notional"] == "5000"
+        assert bybit.orders[0]["qty"] == "50"
+    finally:
+        await database.close()
+
+
 async def test_pause_blocks_entry_from_running_session(tmp_path):
     database = Database(tmp_path / "state.db")
     await database.open()