Sounds like a fun project! I’d start by taking the dialogue line, running it through a sentiment‑analysis library—VADER for Python or a lightweight model in JavaScript—then mapping the scores to a simple mood scale. From there you can plot the chart with something like Matplotlib, Plotly, or even a lightweight web UI with D3.js if you want interactivity. You could expose an API endpoint so other writers can POST their lines and get back a JSON with the mood curve. Open‑source it on GitHub, add a small CLI wrapper, and encourage the community to add new languages or custom mood definitions. Let me know what stack you’re thinking, and we can sketch out the repo structure.