prisma-migration

name	prisma-migration
description	Creates Prisma schema models and generates database migrations from the entity model. Use when the user asks to "create a migration", "update the schema", "set up database tables", "write a Prisma migration", or mentions schema migration, DB migration, database versioning, or Prisma schema changes.

Prisma Migration

Instructions

Create or update the Prisma schema and generate migrations based on docs/entity_model.md.

DO NOT

• Manually write SQL migration files (use npx prisma migrate dev to generate them)
• Drop existing tables or models without explicit user confirmation
• Skip relations defined in the entity model
• Use autoincrement() unless the entity model explicitly requires it (prefer uuid() or cuid() for IDs)

Nexa Rules Gate

Read and follow ${CLAUDE_PLUGIN_ROOT}/shared/readiness/NEXA_RULES_GATE.md.

Worktree Gate

Read and follow ${CLAUDE_PLUGIN_ROOT}/shared/readiness/WORKTREE_GATE.md.

Schema Location

prisma/schema.prisma

Example Schema

model RoomType {
  id          String  @id @default(cuid())
  name        String  @unique @db.VarChar(50)
  description String? @db.VarChar(500)
  capacity    Int
  price       Decimal @db.Decimal(10, 2)
  rooms       Room[]

  @@map("room_type")
}

model Room {
  id           String       @id @default(cuid())
  number       String       @unique @db.VarChar(10)
  roomType     RoomType     @relation(fields: [roomTypeId], references: [id])
  roomTypeId   String       @map("room_type_id")
  reservations Reservation[]

  @@map("room")
}

Workflow

1. Read docs/entity_model.md
2. Read the existing prisma/schema.prisma if it exists
3. Create or update Prisma models with fields, types, relations, and constraints
4. Map entity model validation rules to Prisma attributes (@unique, @db.*, @default, etc.)
5. Ensure relations match the entity model (one-to-many, many-to-many, etc.)
6. Run npx prisma migrate dev --name <descriptive_name> to generate the migration
7. Validate the migration:
   • Verify all entities from the entity model have corresponding models
   • Verify all relations are bidirectional where needed
   • Verify field types and constraints match the entity model
   • Verify the generated SQL migration is correct