diff --git a/libs/python/mcp-server/pyproject.toml b/libs/python/mcp-server/pyproject.toml
index 62fc1a2e..ed2ad435 100644
--- a/libs/python/mcp-server/pyproject.toml
+++ b/libs/python/mcp-server/pyproject.toml
@@ -13,8 +13,8 @@ authors = [
 ]
 dependencies = [
     "mcp>=1.6.0,<2.0.0",
-    "cua-agent[all]>=0.2.0,<0.3.0",
-    "cua-computer>=0.2.0,<0.3.0",
+    "cua-agent[all]>=0.3.0,<0.4.0",
+    "cua-computer>=0.3.0,<0.4.0",
 ]
 
 [project.scripts]
diff --git a/tests/files.py b/tests/files.py
index 236ef9e2..bcfbb4f5 100644
--- a/tests/files.py
+++ b/tests/files.py
@@ -136,6 +136,262 @@ async def test_create_dir(computer):
     assert exists is True, "Directory should exist"
     await computer.interface.delete_dir(tmp_dir)
 
+
+@pytest.mark.asyncio(loop_scope="session")
+async def test_read_bytes_basic(computer):
+    """Test basic read_bytes functionality."""
+    tmp_path = "test_read_bytes.bin"
+    test_data = b"Hello, World! This is binary data \x00\x01\x02\x03"
+    
+    # Write binary data using write_text (assuming it handles bytes)
+    await computer.interface.write_text(tmp_path, test_data.decode('latin-1'))
+    
+    # Read all bytes
+    read_data = await computer.interface.read_bytes(tmp_path)
+    assert read_data == test_data, "Binary data should match"
+    
+    await computer.interface.delete_file(tmp_path)
+
+
+@pytest.mark.asyncio(loop_scope="session")
+async def test_read_bytes_with_offset_and_length(computer):
+    """Test read_bytes with offset and length parameters."""
+    tmp_path = "test_read_bytes_offset.bin"
+    test_data = b"0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+    
+    # Write test data
+    await computer.interface.write_text(tmp_path, test_data.decode('latin-1'))
+    
+    # Test reading with offset only
+    read_data = await computer.interface.read_bytes(tmp_path, offset=5)
+    expected = test_data[5:]
+    assert read_data == expected, f"Data from offset 5 should match. Got: {read_data}, Expected: {expected}"
+    
+    # Test reading with offset and length
+    read_data = await computer.interface.read_bytes(tmp_path, offset=10, length=5)
+    expected = test_data[10:15]
+    assert read_data == expected, f"Data from offset 10, length 5 should match. Got: {read_data}, Expected: {expected}"
+    
+    # Test reading from beginning with length
+    read_data = await computer.interface.read_bytes(tmp_path, offset=0, length=10)
+    expected = test_data[:10]
+    assert read_data == expected, f"Data from beginning, length 10 should match. Got: {read_data}, Expected: {expected}"
+    
+    await computer.interface.delete_file(tmp_path)
+
+
+@pytest.mark.asyncio(loop_scope="session")
+async def test_get_file_size(computer):
+    """Test get_file_size functionality."""
+    tmp_path = "test_file_size.txt"
+    test_content = "A" * 1000  # 1000 bytes
+    
+    await computer.interface.write_text(tmp_path, test_content)
+    
+    file_size = await computer.interface.get_file_size(tmp_path)
+    assert file_size == 1000, f"File size should be 1000 bytes, got {file_size}"
+    
+    await computer.interface.delete_file(tmp_path)
+
+
+@pytest.mark.asyncio(loop_scope="session")
+async def test_read_large_file(computer):
+    """Test reading a file larger than 10MB to verify chunked reading."""
+    tmp_path = "test_large_file.bin"
+    
+    # Create a file larger than 10MB (10 * 1024 * 1024 = 10,485,760 bytes)
+    total_size = 12 * 1024 * 1024  # 12MB
+    
+    print(f"Creating large file of {total_size} bytes ({total_size / (1024*1024):.1f}MB)...")
+    
+    # Create large file content (this will test the chunked writing functionality)
+    large_content = b"X" * total_size
+    
+    # Write the large file using write_bytes (will automatically use chunked writing)
+    await computer.interface.write_bytes(tmp_path, large_content)
+    
+    # Verify file size
+    file_size = await computer.interface.get_file_size(tmp_path)
+    assert file_size == total_size, f"Large file size should be {total_size} bytes, got {file_size}"
+    
+    print(f"Large file created successfully: {file_size} bytes")
+    
+    # Test reading the entire large file (should use chunked reading)
+    print("Reading large file...")
+    read_data = await computer.interface.read_bytes(tmp_path)
+    assert len(read_data) == total_size, f"Read data size should match file size. Got {len(read_data)}, expected {total_size}"
+    
+    # Verify content (should be all 'X' characters)
+    expected_data = b"X" * total_size
+    assert read_data == expected_data, "Large file content should be all 'X' characters"
+    
+    print("Large file read successfully!")
+    
+    # Test reading with offset and length on large file
+    offset = 5 * 1024 * 1024  # 5MB offset
+    length = 2 * 1024 * 1024  # 2MB length
+    read_data = await computer.interface.read_bytes(tmp_path, offset=offset, length=length)
+    assert len(read_data) == length, f"Partial read size should be {length}, got {len(read_data)}"
+    assert read_data == b"X" * length, "Partial read content should be all 'X' characters"
+    
+    print("Large file partial read successful!")
+    
+    # Clean up
+    await computer.interface.delete_file(tmp_path)
+    print("Large file test completed successfully!")
+
+@pytest.mark.asyncio(loop_scope="session")
+async def test_read_write_text_with_encoding(computer):
+    """Test reading and writing text files with different encodings."""
+    print("Testing text file operations with different encodings...")
+    
+    tmp_path = "test_encoding.txt"
+    
+    # Test UTF-8 encoding (default)
+    utf8_content = "Hello, 世界! 🌍 Ñoño café"
+    await computer.interface.write_text(tmp_path, utf8_content, encoding='utf-8')
+    read_utf8 = await computer.interface.read_text(tmp_path, encoding='utf-8')
+    assert read_utf8 == utf8_content, "UTF-8 content should match"
+    
+    # Test ASCII encoding
+    ascii_content = "Hello, World! Simple ASCII text."
+    await computer.interface.write_text(tmp_path, ascii_content, encoding='ascii')
+    read_ascii = await computer.interface.read_text(tmp_path, encoding='ascii')
+    assert read_ascii == ascii_content, "ASCII content should match"
+    
+    # Test Latin-1 encoding
+    latin1_content = "Café, naïve, résumé"
+    await computer.interface.write_text(tmp_path, latin1_content, encoding='latin-1')
+    read_latin1 = await computer.interface.read_text(tmp_path, encoding='latin-1')
+    assert read_latin1 == latin1_content, "Latin-1 content should match"
+    
+    # Clean up
+    await computer.interface.delete_file(tmp_path)
+    print("Text encoding test completed successfully!")
+
+@pytest.mark.asyncio(loop_scope="session")
+async def test_write_text_append_mode(computer):
+    """Test appending text to files."""
+    print("Testing text file append mode...")
+    
+    tmp_path = "test_append.txt"
+    
+    # Write initial content
+    initial_content = "First line\n"
+    await computer.interface.write_text(tmp_path, initial_content)
+    
+    # Append more content
+    append_content = "Second line\n"
+    await computer.interface.write_text(tmp_path, append_content, append=True)
+    
+    # Read and verify
+    final_content = await computer.interface.read_text(tmp_path)
+    expected_content = initial_content + append_content
+    assert final_content == expected_content, f"Expected '{expected_content}', got '{final_content}'"
+    
+    # Append one more line
+    third_content = "Third line\n"
+    await computer.interface.write_text(tmp_path, third_content, append=True)
+    
+    # Read and verify final result
+    final_content = await computer.interface.read_text(tmp_path)
+    expected_content = initial_content + append_content + third_content
+    assert final_content == expected_content, f"Expected '{expected_content}', got '{final_content}'"
+    
+    # Clean up
+    await computer.interface.delete_file(tmp_path)
+    print("Text append test completed successfully!")
+
+@pytest.mark.asyncio(loop_scope="session")
+async def test_large_text_file(computer):
+    """Test reading and writing large text files (>5MB) to verify chunked operations."""
+    print("Testing large text file operations...")
+    
+    tmp_path = "test_large_text.txt"
+    
+    # Create a large text content (approximately 6MB)
+    # Each line is about 100 characters, so 60,000 lines ≈ 6MB
+    line_template = "This is line {:06d} with some additional text to make it longer and reach about 100 chars.\n"
+    large_content = ""
+    num_lines = 60000
+    
+    print(f"Generating large text content with {num_lines} lines...")
+    for i in range(num_lines):
+        large_content += line_template.format(i)
+    
+    content_size_mb = len(large_content.encode('utf-8')) / (1024 * 1024)
+    print(f"Generated text content size: {content_size_mb:.2f} MB")
+    
+    # Write the large text file
+    print("Writing large text file...")
+    await computer.interface.write_text(tmp_path, large_content)
+    
+    # Read the entire file back
+    print("Reading large text file...")
+    read_content = await computer.interface.read_text(tmp_path)
+    
+    # Verify content matches
+    assert read_content == large_content, "Large text file content should match exactly"
+    
+    # Test partial reading by reading as bytes and decoding specific portions
+    print("Testing partial text reading...")
+    
+    # Read first 1000 characters worth of bytes
+    first_1000_chars = large_content[:1000]
+    first_1000_bytes = first_1000_chars.encode('utf-8')
+    read_bytes = await computer.interface.read_bytes(tmp_path, offset=0, length=len(first_1000_bytes))
+    decoded_partial = read_bytes.decode('utf-8')
+    assert decoded_partial == first_1000_chars, "Partial text reading should match"
+    
+    # Test appending to large file
+    print("Testing append to large text file...")
+    append_text = "\n--- APPENDED CONTENT ---\nThis content was appended to the large file.\n"
+    await computer.interface.write_text(tmp_path, append_text, append=True)
+    
+    # Read and verify appended content
+    final_content = await computer.interface.read_text(tmp_path)
+    expected_final = large_content + append_text
+    assert final_content == expected_final, "Appended large text file should match"
+    
+    # Clean up
+    await computer.interface.delete_file(tmp_path)
+    print("Large text file test completed successfully!")
+
+@pytest.mark.asyncio(loop_scope="session")
+async def test_text_file_edge_cases(computer):
+    """Test edge cases for text file operations."""
+    print("Testing text file edge cases...")
+    
+    tmp_path = "test_edge_cases.txt"
+    
+    # Test empty file
+    empty_content = ""
+    await computer.interface.write_text(tmp_path, empty_content)
+    read_empty = await computer.interface.read_text(tmp_path)
+    assert read_empty == empty_content, "Empty file should return empty string"
+    
+    # Test file with only whitespace
+    whitespace_content = "   \n\t\r\n   \n"
+    await computer.interface.write_text(tmp_path, whitespace_content)
+    read_whitespace = await computer.interface.read_text(tmp_path)
+    assert read_whitespace == whitespace_content, "Whitespace content should be preserved"
+    
+    # Test file with special characters and newlines
+    special_content = "Line 1\nLine 2\r\nLine 3\tTabbed\nSpecial: !@#$%^&*()\n"
+    await computer.interface.write_text(tmp_path, special_content)
+    read_special = await computer.interface.read_text(tmp_path)
+    assert read_special == special_content, "Special characters should be preserved"
+    
+    # Test very long single line (no newlines)
+    long_line = "A" * 10000  # 10KB single line
+    await computer.interface.write_text(tmp_path, long_line)
+    read_long_line = await computer.interface.read_text(tmp_path)
+    assert read_long_line == long_line, "Long single line should be preserved"
+    
+    # Clean up
+    await computer.interface.delete_file(tmp_path)
+    print("Text file edge cases test completed successfully!")
+
 if __name__ == "__main__":
     # Run tests directly
     pytest.main([__file__, "-v"])