diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..8c9d70a
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,50 @@
+[build-system]
+requires = ["setuptools>=61.0", "wheel"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "cli-diff-auditor"
+version = "1.0.0"
+description = "A CLI tool that automatically audits code diffs before commit by scanning staged changes for common issues"
+readme = "README.md"
+license = {text = "MIT"}
+requires-python = ">=3.8"
+classifiers = [
+    "Development Status :: 4 - Beta",
+    "Environment :: Console",
+    "Intended Audience :: Developers",
+    "License :: OSI Approved :: MIT License",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.8",
+    "Programming Language :: Python :: 3.9",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
+]
+dependencies = [
+    "click>=8.0",
+    "gitpython>=3.1",
+    "pyyaml>=6.0",
+    "rich>=13.0",
+]
+
+[project.optional-dependencies]
+dev = [
+    "pytest>=7.0",
+    "pytest-cov>=4.0",
+]
+
+[project.scripts]
+diff-auditor = "cli_diff_auditor.cli:main"
+
+[tool.setuptools.packages.find]
+where = ["src"]
+
+[tool.pytest.ini_options]
+testpaths = ["tests"]
+python_files = ["test_*.py"]
+python_functions = ["test_*"]
+addopts = "-v --tb=short"
+
+[tool.setuptools]
+package-dir = {"" = "src"}