Notes on the structure demonstrated:

• Workflows require one file: you can organize Workflow code however you like, but each Worker needs to reference a single file that exports all the Workflows it handles (so you have to handle name conflicts instead of us)
• Activities are top level:
  • Inside the Temporal Worker, Activities are registered at the same level Workflows are.
  • Since Activities are required, not bundled, Activities don't need to be exported in a single file. Just make sure they are registered with some Workers if you intend them to be executed.
  • You can organize activities however you like, but it is important to understand that activities don't "belong" to workflows as far as Temporal is concerned.

We built this with yarn Workspaces. We expect this structure to work with most monorepo tooling: lerna, pnpm, nx, preconstruct, changesets, and Rush but haven't verified it - we cannot support your build tooling specifics but don't mind receiving feedback in our issues.