This is one way of using yarn + lerna with typescript.

See packages/someclient/src/main.ts for top level.

There's no explicit support for having multiple build modes with different output directories. To add that:

• create tsconfig.buildmode.json files in each package that creates a different output directory.
• add scripts to package.jsons

Note that with multiple output directories, imports using index.ts probably don't work, because lib/index.js is explicitly pointed at by the package's package.json

The use of typescript references and some related structure are from learn-a. See also the "References" section of this Medium post.