---

name: crdt description: Loro CRDT state management with loro-mirror. Use when working on files in src/lib/crdt/.

CRDT Guidelines

Critical: Draft-Style Mutations Only

Copy// CORRECT - mutate in place
setState((state) => {
  state.transactions[id] = transaction;
});

// WRONG - returning new objects breaks change tracking
setState((state) => ({
  ...state,
  transactions: { ...state.transactions, [id]: transaction },
}));

Rules

• Import types from schema.ts, don't redeclare
• Soft deletes: Set deletedAt timestamp, never remove from document
• Use crypto.randomUUID() for IDs, Date.now() for timestamps

Schema Pattern

Copyexport const entitySchema = schema.LoroMap({
  id: schema.String({ required: true }),
  // ... fields
  deletedAt: schema.Number(), // 0 = not deleted, >0 = timestamp
});

React Hooks

• useActiveTransactions() - excludes soft-deleted
• useTransactions() - includes soft-deleted
• useVaultAction() - for mutations

Sync

• Updates encrypted before leaving client
• Loro handles versioning via version vectors
• Conflicts: last-write-wins per field