---
id: cfc0687c-a071-42ea-a906-1dd8b1c7484a
type: decision
title: "Store DeckConfig with Decks"
tags: [mantimon-tcg, architecture, decision, deck, database]
importance: 0.7
confidence: 0.8
created: "2026-01-31T17:32:48.578182+00:00"
updated: "2026-01-31T17:32:48.578182+00:00"
---

When a deck is created, the DeckConfig used for validation should be persisted with the deck in the database. This ensures: 1) The deck can be re-validated later with the same rules it was created under, 2) Different game modes can have different rules, 3) Historical decks remain valid even if default rules change. Implementation: Add deck_config JSONB column to decks table, update DeckResponse to include it, update deck service to persist on create/update.