This is a straightforward prompt for having Claude handle time series work like forecasting, seasonality detection, and trend decomposition. You'd reach for it when you need to predict future values from historical data, spot cyclical patterns in sales or traffic, or break down temporal data into its component parts. The skill comes from aj-geddes' useful-ai-prompts collection, which has 245 GitHub stars and passes all three security audits. It covers the standard time series toolkit: autocorrelation analysis, confidence intervals, and the classic decomposition into trend, seasonal, and residual components. Good fit if you're doing exploratory data analysis on timestamped data and want Claude to guide the analytical approach rather than just crunching numbers.
npx skills add https://github.com/aj-geddes/useful-ai-prompts --skill time-series-analysis