User & Cohort Forensics

The arcs

Single user deep-dive: get_amp_user_data include: 'id' (resolve the user: email, user ID, device ID, or amplitude ID) → include: 'profile' (lifecycle, acquisition, usage stats) → include: 'timeline' (session-aware event history). include: 'both' gets profile + timeline in one call when you know you'll need both. Summarize journeys; don't dump raw events.

Population analysis (batched): build the user set first (query_amplitude_data with a user-ID group_by to rank by volume, or use_amplitude_cohorts action: 'find' for a filtered set) → get_amp_user_data include: 'timeline' in parallel batches — up to 10 identifiers per call, 10–20 calls in flight is normal for population analysis; hundreds of calls total is fine. Keep each call narrow (event types, window) so responses stay small.