TDD-GPT-Agent integrates OpenAI’s GPT-4 or GPT-3.5 models in a Python-based CLI to drive a fully automated test-driven development cycle. Given a developer’s function specification, it generates pytest test files, runs tests locally, analyzes failures, and produces implementation code to satisfy assertions. It repeats the cycle until all tests pass. Configurable via a YAML file, the agent supports prompt customization, session logging, Git integration, and can be embedded in CI/CD pipelines for continuous quality assurance. This AI-driven workflow accelerates development, improves coverage, and enforces reliable code.