Introduction | Installation | Quick Start | Option A — via the meta-package | Option B — install only the domain you need | The Ecosystem | Best Practices for Classification | What works | What doesn't help (or hurts) | Summary | Configuration | Get an API key | Store your key in .Renviron (recommended) | Run entirely locally with no API key | Supported Models | Ensemble & multi-model classification | API Reference (brief) | R ↔ Python type translation | Where to go from here

What cat.ademic adds | Install | Classify abstracts you already have | Fetch papers from a journal | Fetch papers by topic | Classify full-text PDFs | Summarize before classifying | Tips for academic work | Where to learn more

What cat.web adds | Install | Classify a list of URLs | Classify raw text instead | Use web context to disambiguate | Summarize before classifying | Tips for web-data work | Where to learn more

What cat.pol adds | Install | See available data sources | Fetch and classify ordinances | Filter by date range and document type | Classify your own policy text | Summarize before classifying | Tips for political-text work | Where to learn more

What cat.cog does | Install | Score a directory of drawings | Score a vector of individual files | The four CERAD shapes | Image preparation tips | Use a strong vision model | Validation | Where to learn more

What cat.survey adds | Install | Quick classification | Multi-label survey responses | Discovering a category scheme when you don't have one | Recommendations for survey work | Where to learn more

What cat.vader adds | Install | Classify text you already have | Pull and classify in one call | Discovering categories from a feed | Tips for social-media data | Where to learn more