DarkPancakes/clipforge ? reverse-engineered prompt

Build me a Python tool called ClipForge that can turn a topic or a custom script into a finished vertical short video for YouTube Shorts or TikTok.

I want a simple command line flow where I can run one command, give it a topic and a style, and it writes a short script, creates matching AI visuals, adds a natural sounding voice, puts animated word by word subtitles on the video, and exports a ready to upload 1080 by 1920 MP4. It should also work if I give it my own script instead of using AI writing. Use FFmpeg for the final render, and make sure it can fall back gracefully if image generation or an LLM key is not available.

It would be great if there is also a small Python API so I can generate videos from code, plus a few example scripts showing the basic use. If you need to check current docs for the AI image or voice services, look them up online first.