This handles the math you need when someone asks "is this worth it?" It covers the basics like simple ROI and payback period, plus marketing attribution, CAGR for investment analysis, and break-even calculations. The what-if scenarios and comparative analysis features are genuinely useful if you're building dashboards or internal tools where stakeholders want to play with numbers. It's passed audits from Gen Agent Trust Hub, Socket, and Snyk, which is reassuring given it's pulling nearly 200 installs. Straightforward Python implementation that does what the label says without trying to be more clever than necessary.
npx skills add https://github.com/dkyazzentwatwa/chatgpt-skills --skill roi-calculator