prisma-upgrade-v7

Files (8)

• SKILL.md
• accelerate-users.md · references/
• driver-adapters.md · references/
• env-variables.md · references/
• esm-support.md · references/
• prisma-config.md · references/
• removed-features.md · references/
• schema-changes.md · references/

SKILL.md (first lines)

# Upgrade to Prisma ORM 7

Complete guide for migrating from Prisma ORM v6 to v7. This upgrade introduces significant breaking changes around the new `prisma-client` generator, driver adapters, `prisma.config.ts`, explicit environment loading, and generated client entrypoints.

## When to Apply

Reference this skill when:
- Upgrading from Prisma v6 to v7
- Updating to the `prisma-client` generator
- Setting up driver adapters
- Configuring `prisma.config.ts`
- Fixing import errors after upgrade

## Rule Categories by Priority

| Priority | Category | Impact | Prefix |
|----------|----------|--------|--------|
| 1 | Schema Migration | CRITICAL | `schema-changes` |
| 2 | Database Connectivity | CRITICAL | `driver-adapters` |
| 3 | Module System | CRITICAL | `esm-support` |
| 4 | Config and Env | HIGH | `prisma-config`, `env-variables` |
| 5 | Removed Features | HIGH | `removed-features` |
| 6 | Accelerate | HIGH | `accelerate-users` |

## Quick Reference

- `schema-changes` - generator migration, required output paths, generated entrypoints, and `Prisma.validator` replacement
- `driver-adapters` - required adapter installation for SQL providers, pool differences, and Prisma Postgres adapter choices
- `esm-support` - ESM-first setup plus CommonJS fallback with `moduleFormat = "cjs"`
- `prisma-config` - creating and using `prisma.config.ts`
- `env-variables` - explicit environment loading
- `removed-features` - removed middleware, metrics, and legacy CLI behavior
- `accelerate-users` - migration notes for Accelerate users

## Using MongoDB? This guide does not apply

Prisma 7 has no MongoDB connector. Do not apply any step in this guide to a project with
`provider = "mongodb"` — see the `prisma-mongodb-upgrade` skill for the actual decision
(stay on v6 deliberately vs migrate to Prisma Next).

## Important Notes

- **MongoDB projects should stay on Prisma 6.x or migrate to Prisma Next** - do not migrate MongoDB apps to Prisma 7's SQL client path (see `prisma-mongodb-upgrade`)
- **Node.js 20.19.0+** required
- **TypeScript 5.4.0+** required
- **Latest stable Prisma ORM version**: `7.6.0`

## Upgrade Steps Overview

1. Update packages to v7
2. Choose your module format (`esm` by default, `cjs` if needed)
3. Update TypeScript configuration
4. Update the schema generator block
5. Create `prisma.config.ts`
6. Install and configure a driver adapter for SQL providers
7. Update Prisma Client imports
8. Update client instantiation
9. Replace deprecated helper patterns like `Prisma.validator`
10. Run `prisma generate` and test

## Quick Upgrade Commands

```bash
# Update packages
npm install @prisma/client@7
npm install -D prisma@7

# Install a driver adapter (PostgreSQL or Prisma Postgres via direct TCP)
npm install @prisma/adapter-pg pg

# Install dotenv for env loading
npm install dotenv

# Regenerate client
npx prisma generate
```

## Breaking Changes Summary

| Change | v6 | v7 |
|--------|----|----|
| Module format | Implicit / mixed | ESM-first, `moduleFormat = "cjs"` supported |
| Generator provider | `prisma-client-js` | `prisma-client` is the default, while `prisma-client-js` still exists for legacy setups |
| Output path | Auto (node_modules) | Required explicit |
| Driver adapters | Optional | Required for SQL providers |
| Config file | `.env` + schema | `prisma.config.ts` |
| Env loading | Automatic | Manual (dotenv) |
| Generated entrypoints | Single package export | `client`, `browser`, `models`, `enums` entrypoints |
| Type-safe query fragments | `Prisma.validator()` | TypeScript `satisfies` |
| Middleware | `$use()` | Client Extensions |
| Metrics | Preview feature | Removed |

## Rule Files

Detailed migration guides for each breaking change:

```
references/esm-support.md        - ESM and CommonJS configuration
references/schema-changes.md     - Generator, output, imports, and generated entrypoints
references/driver-adapters.md    - Required driver adapter setup
references/prisma-config.md      - New configuration file
references/env-variables.md      - Environment variable loading
references/removed-features.md   - Middleware, metrics, and CLI flags
references/accelerate-users.md   - Special handling for Accelerate
```

## Step-by-Step Migration

### 1. Update package.json for ESM-first projects

```json
{
  "type": "module"
}
```

If you need to stay on CommonJS, keep your app as CJS and set `moduleFormat = "cjs"` in the generator block instead of forcing ESM.

### 2. Update tsconfig.json

From Velclaw/Velclaw-OCodejs, MIT.