Code to reproduce the issue:

Step 1: Create package.json with the following content

{
  "private": true,
  "version": "0.0.0",
  "engines": {
    "pnpm": ">= 99999.0.0"
  }
}

Step 2: Run pnpm install ...

Expected behavior:

pnpm should at least warn user for not using demanded version.

Actual behavior:

pnpm goes ahead and installs dependencies anyway

Why?

• pnpm can be used to manage monorepo.
• Different pnpm versions might provide different monorepo features.
• Different monorepos might demand different features from pnpm.