Initial commit: add .gitignore and README

contracts/test/AtomicExecutorLargeBatch.t.sol

@@ -0,0 +1,70 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.20;
+
+import {Test, console} from "forge-std/Test.sol";
+import {AtomicExecutor} from "../AtomicExecutor.sol";
+
+contract MockTarget {
+    uint256 public value;
+    
+    function setValue(uint256 _value) external {
+        value = _value;
+    }
+}
+
+contract AtomicExecutorLargeBatchTest is Test {
+    AtomicExecutor executor;
+    MockTarget target;
+    address owner = address(1);
+    address user = address(2);
+
+    function setUp() public {
+        vm.prank(owner);
+        executor = new AtomicExecutor(owner);
+        
+        target = new MockTarget();
+        
+        vm.prank(owner);
+        executor.setAllowedTarget(address(target), true);
+    }
+
+    function testVeryLargeBatch() public {
+        // Test with 100 calls (near gas limit)
+        address[] memory targets = new address[](100);
+        bytes[] memory calldatas = new bytes[](100);
+
+        for (uint i = 0; i < 100; i++) {
+            targets[i] = address(target);
+            calldatas[i] = abi.encodeWithSignature("setValue(uint256)", i);
+        }
+
+        uint256 gasBefore = gasleft();
+        vm.prank(user);
+        executor.executeBatch(targets, calldatas);
+        uint256 gasUsed = gasBefore - gasleft();
+        
+        // Verify last value
+        assertEq(target.value(), 99);
+        
+        // Log gas usage for optimization
+        console.log("Gas used for 100 calls:", gasUsed);
+    }
+
+    function testGasLimitBoundary() public {
+        // Test with calls that approach block gas limit
+        // This helps identify optimal batch size
+        address[] memory targets = new address[](50);
+        bytes[] memory calldatas = new bytes[](50);
+
+        for (uint i = 0; i < 50; i++) {
+            targets[i] = address(target);
+            calldatas[i] = abi.encodeWithSignature("setValue(uint256)", i);
+        }
+
+        vm.prank(user);
+        executor.executeBatch(targets, calldatas);
+        
+        assertEq(target.value(), 49);
+    }
+}
+