The short answer
Astra synthesizes customer interviews by reading every transcript, clustering themes, and ranking insights by frequency × severity. She accepts transcripts from Granola, Notion, raw .txt files, or video recordings (auto-transcribed first), reads each in full, extracts every claim or pain point with the verbatim quote, clusters quotes into themes (e.g., "onboarding friction," "missing integration," "price too high"), counts mentions per theme, and ranks by frequency × emotional intensity. Output is a Lark brief with the top 5 themes, 2-3 verbatim quotes per theme, recommended actions, and routed Linear tickets per theme (product issues to product, sales objections to sales, marketing gaps to marketing). The synthesis is reproducible — re-run with new transcripts and Astra updates the same brief, showing what shifted.