@walcast/typegen-prisma

Typed walcast change events from your Prisma schema. Pure codegen — the generated file has zero runtime imports.

npx @walcast/typegen-prisma --schema prisma/schema.prisma --out src/walcast-types.ts

import { Walcast } from 'walcast'
import { isChange } from './walcast-types'

for await (const event of tr.changes()) {
  if (isChange(event, 'users')) {
    event.after?.email // string — typed, narrowed by table
  }
  tr.ack(event)
}

Types are honest about what the wire actually carries (pgoutput text tuples): BigInt and Decimal map to string (no silent precision loss), DateTime to the Postgres text form, lists to Postgres array literals. @map/@@map are respected — events carry database names, so the generated types do too.

Docs: https://walcast.mmadan.in/guide/typed-events

License

MIT