diff --git a/quick_calc/pyproject.toml b/quick_calc/pyproject.toml
index cdde5e7..a84a92e 100644
--- a/quick_calc/pyproject.toml
+++ b/quick_calc/pyproject.toml
@@ -5,3 +5,7 @@ description = "Add your description here"
 readme = "README.md"
 requires-python = ">=3.12"
 dependencies = []
+
+[tool.pytest.ini_options]
+testpaths = ["tests"]
+pythonpath = ["src"]
diff --git a/quick_calc/src/__init__.py b/quick_calc/src/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/quick_calc/src/__pycache__/__init__.cpython-312.pyc b/quick_calc/src/__pycache__/__init__.cpython-312.pyc
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diff --git a/quick_calc/src/__pycache__/quick_calc.cpython-312.pyc b/quick_calc/src/__pycache__/quick_calc.cpython-312.pyc
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diff --git a/quick_calc/src/quick_calc.py b/quick_calc/src/quick_calc.py
new file mode 100644
index 0000000..ee7ebcd
--- /dev/null
+++ b/quick_calc/src/quick_calc.py
@@ -0,0 +1,23 @@
+def add(a, b):
+    """
+    Add two numbers together.
+    
+    Args:
+        a: First number (int or float)
+        b: Second number (int or float)
+        
+    Returns:
+        The sum of a and b
+        
+    Raises:
+        TypeError: If either argument is not a number
+    """
+    # Check if both arguments are numbers (int or float) but not booleans
+    # In Python, bool is a subclass of int, so we need to check for bool separately
+    if isinstance(a, bool) or isinstance(b, bool):
+        raise TypeError(f"Boolean values are not allowed, got {type(a).__name__} and {type(b).__name__}")
+    
+    if not isinstance(a, (int, float)) or not isinstance(b, (int, float)):
+        raise TypeError(f"Both arguments must be numbers (int or float), got {type(a).__name__} and {type(b).__name__}")
+    
+    return a + b
\ No newline at end of file
diff --git a/quick_calc/tests/__init__.py b/quick_calc/tests/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/quick_calc/tests/__pycache__/__init__.cpython-312.pyc b/quick_calc/tests/__pycache__/__init__.cpython-312.pyc
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diff --git a/quick_calc/tests/__pycache__/test_addition.cpython-312-pytest-8.3.4.pyc b/quick_calc/tests/__pycache__/test_addition.cpython-312-pytest-8.3.4.pyc
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diff --git a/quick_calc/tests/test_addition.py b/quick_calc/tests/test_addition.py
new file mode 100644
index 0000000..aff244a
--- /dev/null
+++ b/quick_calc/tests/test_addition.py
@@ -0,0 +1,130 @@
+import pytest
+import sys
+import os
+# Add the src directory to the path
+sys.path.insert(0, os.path.join(os.path.dirname(__file__), '..'))
+
+from src.quick_calc import add
+
+
+class TestAddition:
+    """Test cases for the add function covering all edge cases."""
+    
+    def test_positive_integers(self):
+        """Test addition of positive integers."""
+        assert add(2, 3) == 5
+        assert add(100, 200) == 300
+        assert add(1, 1) == 2
+    
+    def test_negative_integers(self):
+        """Test addition of negative integers."""
+        assert add(-2, -3) == -5
+        assert add(-100, -200) == -300
+        assert add(-1, -1) == -2
+    
+    def test_mixed_positive_negative_integers(self):
+        """Test addition of positive and negative integers."""
+        assert add(5, -3) == 2
+        assert add(-5, 3) == -2
+        assert add(10, -10) == 0
+        assert add(-10, 10) == 0
+    
+    def test_zero_addition(self):
+        """Test addition involving zero."""
+        assert add(0, 0) == 0
+        assert add(5, 0) == 5
+        assert add(0, 5) == 5
+        assert add(-5, 0) == -5
+        assert add(0, -5) == -5
+    
+    def test_positive_floats(self):
+        """Test addition of positive floating point numbers."""
+        assert abs(add(2.5, 3.7) - 6.2) < 1e-10  # Using approximate comparison
+        assert add(1.1, 2.2) == pytest.approx(3.3)
+    
+    def test_negative_floats(self):
+        """Test addition of negative floating point numbers."""
+        assert add(-2.5, -3.7) == pytest.approx(-6.2)
+        assert add(-1.1, -2.2) == pytest.approx(-3.3)
+    
+    def test_mixed_positive_negative_floats(self):
+        """Test addition of positive and negative floating point numbers."""
+        assert add(5.5, -3.3) == pytest.approx(2.2)
+        assert add(-5.5, 3.3) == pytest.approx(-2.2)
+        assert add(10.0, -10.0) == 0.0
+    
+    def test_integer_and_float(self):
+        """Test addition of integers and floats."""
+        assert add(5, 2.5) == 7.5
+        assert add(2.5, 5) == 7.5
+        assert add(-5, 2.5) == -2.5
+        assert add(2.5, -5) == -2.5
+    
+    def test_large_numbers(self):
+        """Test addition of large numbers."""
+        assert add(1000000, 2000000) == 3000000
+        assert add(1e10, 1e10) == 2e10
+        assert add(-1e10, 1e10) == 0
+    
+    def test_very_small_numbers(self):
+        """Test addition of very small numbers."""
+        assert add(1e-10, 1e-10) == pytest.approx(2e-10)
+        assert add(1e-15, 0) == pytest.approx(1e-15)
+    
+    def test_floating_point_precision(self):
+        """Test addition with floating point precision considerations."""
+        assert add(0.1, 0.2) == pytest.approx(0.3)
+    
+    def test_type_error_with_strings(self):
+        """Test that adding strings raises TypeError."""
+        with pytest.raises(TypeError):
+            add("hello", "world")
+        with pytest.raises(TypeError):
+            add("5", 3)
+        with pytest.raises(TypeError):
+            add(5, "3")
+    
+    def test_type_error_with_lists(self):
+        """Test that adding lists raises TypeError."""
+        with pytest.raises(TypeError):
+            add([1, 2], [3, 4])
+        with pytest.raises(TypeError):
+            add([1], 5)
+        with pytest.raises(TypeError):
+            add(5, [1])
+    
+    def test_type_error_with_none(self):
+        """Test that adding None raises TypeError."""
+        with pytest.raises(TypeError):
+            add(None, 5)
+        with pytest.raises(TypeError):
+            add(5, None)
+        with pytest.raises(TypeError):
+            add(None, None)
+    
+    def test_type_error_with_boolean(self):
+        """Test that adding booleans raises TypeError."""
+        with pytest.raises(TypeError):
+            add(True, 5)
+        with pytest.raises(TypeError):
+            add(5, False)
+        with pytest.raises(TypeError):
+            add(True, False)
+    
+    def test_type_error_with_dict(self):
+        """Test that adding dicts raises TypeError."""
+        with pytest.raises(TypeError):
+            add({}, {})
+        with pytest.raises(TypeError):
+            add({"a": 1}, 5)
+        with pytest.raises(TypeError):
+            add(5, {"a": 1})
+    
+    def test_type_error_with_set(self):
+        """Test that adding sets raises TypeError."""
+        with pytest.raises(TypeError):
+            add({1, 2}, {3, 4})
+        with pytest.raises(TypeError):
+            add({1, 2}, 5)
+        with pytest.raises(TypeError):
+            add(5, {1, 2})
\ No newline at end of file
diff --git a/quick_calc/uv.lock b/quick_calc/uv.lock
new file mode 100644
index 0000000..d98e009
--- /dev/null
+++ b/quick_calc/uv.lock
@@ -0,0 +1,7 @@
+version = 1
+requires-python = ">=3.12"
+
+[[package]]
+name = "quick-calc"
+version = "0.1.0"
+source = { virtual = "." }