5,800 Lines in One Day: Bootstrapping a Full Pipeline With gpt-5-codex

The hardest part of a new project is "where do I start." I started by handing the entire scaffolding job to gpt-5-codex. ShortsMaker — a tool that takes saju (Korean astrology) data and produces short-form video — went from zero to 5,800 lines across 4 commits in a single day. Scaffold Everything in One Shot Do not create files one by one. Generate the entire skeleton at once. The prompt: "Bootstrap a Python project that generates short-form video from saju data. CLI: shortsmaker create profile.json produces an MP4 Architecture: Python backend + React/Remotion renderer pyproject.toml, src layout Hooks system for extensibility Multilingual support (Korean, English, Japanese, Chinese) Include directory structure, core modules, config files, and sample data. The result must be immediately runnable." The failing version: "Make me a Python project." The difference: a specific invocation example ( shortsmaker create profile.json ), named tech stack, architecture pattern (hooks, src layout),