diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..195b99b
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,57 @@
+[build-system]
+requires = ["setuptools>=61.0", "wheel"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "i18n-guardian"
+version = "1.0.0"
+description = "A CLI tool that scans codebases for internationalization issues"
+readme = "README.md"
+requires-python = ">=3.10"
+license = {text = "MIT"}
+authors = [
+    {name = "i18n-guardian Team"}
+]
+keywords = ["i18n", "internationalization", "cli", "l10n", "localization"]
+classifiers = [
+    "Development Status :: 4 - Beta",
+    "Intended Audience :: Developers",
+    "License :: OSI Approved :: MIT License",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12"
+]
+
+dependencies = [
+    "click>=8.1.8",
+    "tree-sitter>=0.25.2",
+    "pyyaml>=6.0.3",
+    "rich>=14.3.2",
+    "pathspec>=1.0.4",
+]
+
+[project.optional-dependencies]
+dev = [
+    "pytest>=9.0.2",
+    "pytest-cov>=6.1.2",
+]
+
+[project.scripts]
+i18n-guardian = "i18n_guardian.cli:main"
+
+[tool.setuptools.packages.find]
+where = ["."]
+
+[tool.pytest.ini_options]
+testpaths = ["tests"]
+python_files = ["test_*.py"]
+python_classes = ["Test*"]
+python_functions = ["test_*"]
+
+[tool.coverage.run]
+source = ["i18n_guardian"]
+omit = ["tests/*"]
+
+[tool.coverage.report]
+exclude_lines = ["pragma: no cover", "def __repr__", "raise AssertionError", "raise NotImplementedError"]