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Analyze weekly marketing campaign performance data across channels. Use when analyzing multi-channel digital marketing data to calculate funnel metrics (CTR, CVR) and compare to benchmarks, compute cost and revenue efficiency metrics (ROAS, CPA, Net Profit), or get budget reallocation recommendations based on performance rules.

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Generate educational practice questions from lecture notes to test student understanding. Use when users request practice questions, exam preparation materials, study guides, or assessment items based on lecture content.

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Comprehensive diagnostic analysis of time series data. Use when users provide CSV time series data and want to understand its characteristics before forecasting - stationarity, seasonality, trend, forecastability, and transform recommendations.

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Stage the relevant git changes and create a commit using this repo's emoji-prefixed conventional commit format. Use when the user asks Codex to commit changes, stage and commit selected files, or draft a concise Chinese commit message from the current diff.

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Plan and implement interactive chapter or playground pages for this Docusaurus repo. Use when Codex needs to port AI-generated JSX into JoyRL Book, add a standalone interactive route under `src/pages/`, wire a chapter into interactive mode, or extend the current left-reading/right-playground interaction pattern.

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