diff --git a/src/string_reversal.py b/src/string_reversal.py
new file mode 100644
index 00000000..c6d47662
--- /dev/null
+++ b/src/string_reversal.py
@@ -0,0 +1,32 @@
+def reverse_string(s: str) -> str:
+    """
+    Reverse the given string using manual character iteration.
+    
+    Args:
+        s (str): The input string to be reversed.
+    
+    Returns:
+        str: The reversed string.
+    
+    Raises:
+        TypeError: If the input is not a string.
+    """
+    # Validate input
+    if not isinstance(s, str):
+        raise TypeError("Input must be a string")
+    
+    # Convert string to list of characters for manual reversal
+    chars = list(s)
+    
+    # Perform manual reversal using two-pointer technique
+    left, right = 0, len(chars) - 1
+    while left < right:
+        # Swap characters
+        chars[left], chars[right] = chars[right], chars[left]
+        
+        # Move pointers
+        left += 1
+        right -= 1
+    
+    # Convert back to string and return
+    return ''.join(chars)
\ No newline at end of file
diff --git a/tests/test_string_reversal.py b/tests/test_string_reversal.py
new file mode 100644
index 00000000..bd2081e4
--- /dev/null
+++ b/tests/test_string_reversal.py
@@ -0,0 +1,39 @@
+import pytest
+from src.string_reversal import reverse_string
+
+def test_reverse_string_basic():
+    """Test basic string reversal."""
+    assert reverse_string("hello") == "olleh"
+    assert reverse_string("python") == "nohtyp"
+
+def test_reverse_string_empty():
+    """Test reversing an empty string."""
+    assert reverse_string("") == ""
+
+def test_reverse_string_single_char():
+    """Test reversing a single character string."""
+    assert reverse_string("a") == "a"
+
+def test_reverse_string_with_spaces():
+    """Test reversing a string with spaces."""
+    assert reverse_string("hello world") == "dlrow olleh"
+
+def test_reverse_string_with_punctuation():
+    """Test reversing a string with punctuation and mixed characters."""
+    assert reverse_string("hello, world!") == "!dlrow ,olleh"
+    assert reverse_string("a1b2c3") == "3c2b1a"
+
+def test_reverse_string_with_mixed_characters():
+    """Test reversing a string with mixed character types."""
+    assert reverse_string("abc123!@#") == "#@!321cba"
+
+def test_reverse_string_invalid_input():
+    """Test that a TypeError is raised for non-string inputs."""
+    with pytest.raises(TypeError, match="Input must be a string"):
+        reverse_string(123)
+    
+    with pytest.raises(TypeError, match="Input must be a string"):
+        reverse_string(None)
+    
+    with pytest.raises(TypeError, match="Input must be a string"):
+        reverse_string(["list"])