Templates moved from packages/mosaic/templates/ to
packages/mosaic/framework/templates/ in #345. The test's
existsSync guard silently skipped the copy, causing writeSoul
to early-return without writing SOUL.md.
The @mosaic scope registry is configured in ~/.npmrc. Passing --registry
on the install command overrides the default registry for ALL packages,
causing non-@mosaic deps like @clack/prompts to 404 against Gitea.