Research Add Items

This supplements an existing research outline by adding new items without starting from scratch. It automatically finds your outline.yaml file, then asks you what to add while optionally running a web search agent in parallel to discover more sources. The merge is smart enough to avoid duplicates and shows you a preview before saving. Useful when your initial research pass missed something or when new angles emerge mid-project. The parallel input approach is clever since sometimes you know exactly what's missing and sometimes you need the search agent to surface options you hadn't considered.