Node 20 causes npx @deepseek-ai/dsh web to hang without a clear version error

[MongoRolls]

Problem

Running the documented quick-start command with Node.js 20:

npx @deepseek-ai/dsh web

shows the package confirmation prompt, but after confirming it appears to hang indefinitely at the spinner during installation. There is no actionable message explaining that the Node.js version is unsupported.

After switching to Node.js 22, the same command starts successfully.

Expected behavior

DSH should fail fast before installation or profile initialization and print a clear message such as:

Unsupported Node.js version: v20.x
DeepSeek Harness requires Node.js ^22.19.0 or >=24.0.0.
Please upgrade Node.js and retry.

Suggested improvement

1. Propagate the repository's engines.node requirement (^22.19.0 || >=24.0.0) into the published @deepseek-ai/dsh npm package.
2. Add an explicit runtime Node.js version check at the beginning of the CLI.
3. Include a short upgrade example such as nvm install 22 && nvm use 22.

This would make the first-run experience much easier to diagnose than an indefinite spinner.