Anti-Fragile take
The merge-map is the audit trail for every dedupe operation. It records which record was merged into which, why, and with what confidence. Without it, dedupe is irreversible and unexplainable.
We build merge-maps before touching the CRM and use them as guardrails against re-duplication.
Why it matters
Dedupe without a map is data loss with extra steps. The map makes merges auditable and reversible.
How we build it
Warehouse table of loser-to-winner mappings with match type, confidence score, and timestamp. Referenced by create-time dedupe webhooks.