DF9002: Installed Package Not Found
The install finished, but a package is not in the project node_modules.
Message
The install finished, but "{name}" is not in{cwd}/node_modules.
Cause
The package manager exited with code 0, but <cwd>/node_modules/<name> does not exist. This happens when cwd points at a directory other than the one the package manager installed into, for example the workspace root instead of the package that runs the dev server.
Fix
Set cwd to the project that receives the dependency. In a workspace, that is the package whose dev server mounts the onboarding handler.
Source
packages/hub-ui-onboard/src/install.ts:runInstallchecks each named package after the command succeeds. Path, URL and alias specs are not checked, because their installed name is not in the spec.