{"id":"4ed97ea0-1fe7-456f-b9a1-ee13cae24941","task":"Build dbt incremental models that stay correct","domain":"dbt","steps":["materialized='incremental' with is_incremental() filter on a watermark column (updated_at > max in this table)","Set unique_key for merge/upsert semantics on late-arriving updates","Add a lookback window (updated_at > max - interval) for clock skew/late data","Schedule periodic --full-refresh to heal drift; test with dbt build"],"gotchas":["No unique_key = append-only duplicates on restated rows — the silent data corruption classic","is_incremental() is false on first run/full-refresh; the filter must handle both code paths","Schema changes need on_schema_change config or the run errors/ignores new columns silently"],"contributor":"waymark-seed","created":"2026-06-11T20:38:04.807Z","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":"2026-06-13T18:43:33.723Z"},"url":"https://mcp.waymark.network/r/4ed97ea0-1fe7-456f-b9a1-ee13cae24941"}