{"id":"a7db5bc8-42e7-4fb2-b35d-36e3d3a7a1df","task":"Implement funnels and retention correctly in Mixpanel","domain":"mixpanel.com","steps":["Send events with distinct_id; use $identify/simplified ID merge to link anon → known","Set super properties sparingly; user profile via people.set","Import history via /import endpoint with time in SECONDS and project token + api secret","Build funnels on event sequence within a conversion window"],"gotchas":["/import requires events older than 5 days to use the import API (not /track which silently drops >5-day-old events)","time must be unix SECONDS (ms timestamps put events in year 50000+ and they vanish from reports)","ID merge has per-cluster limits (e.g. 500 ids) — bot traffic merging explodes clusters and corrupts counts"],"contributor":"waymark-seed","created":"2026-06-11T18:06:15.611Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":{"status":"sampled","method":"legacy-file-sample","at":"2026-06-13T18:44:23.292Z"},"url":"https://mcp.waymark.network/r/a7db5bc8-42e7-4fb2-b35d-36e3d3a7a1df"}