Given a short story, outline or role-play log, the agent first recommends a format (feature, short, series or short drama), then writes a prompt pack that fixes what must be kept, what may change and what is forbidden. It moves on to a scene outline and screenplay drafts, each followed by a self-check report, and on request to key-shot, scene-level or shot-by-shot storyboards and a list of characters, scenes, props, motifs and costume states. Every stage loads its own template and stops for confirmation, results are saved as Markdown files, and inputs under about 500 characters or bare concepts are sent back for more material. The instructions are written in Chinese, and a complete worked example project is included.