Cookiecutter PyPackage is a cookiecutter template that generates a modern Python package project with production-ready tooling. It produces a src-layout package with a Typer CLI, pytest tests, Ruff linting, ty type checking, uv dependency management, and a justfile task runner. The generated project includes security-hardened GitHub Actions workflows for CI, PyPI publishing via Trusted Publishers, documentation deployment with Zensical, CodeQL and zizmor security scanning, and Dependabot for dependency updates. The template itself is a Python package with a CLI wrapper around cookiecutter, a development watcher for live template iteration, and a comprehensive post-generation hook that optionally sets up a GitHub repository, enables Pages, and creates the PyPI environment. The codebase demonstrates strong engineering practices: comprehensive test coverage, clear separation of concerns, and thoughtful security defaults. It is actively maintained with recent commits and a well-documented changelog.