the npm package is called zkless-engine

https://www.npmjs.com/package/zkless-engine https://github.com/zkoss/zkless-engine

The CLI command is zklessc:

In order to use it you have to install it first:

E.g. globally:

npm install zkless-engine -g
zklessc

or locally:

npm install zkless-engine --save-dev
npx zklessc

the npm package is called zkless-engine

npm install zkless-engine -g
zklessc

npm install zkless-engine --save-dev
npx zklessc