npm's 0.1.5-rc closure is broken upstream: dsh-web-app 0.1.5-rc.3 was
published while the dsh-client-ui-sidebar-documentpreview rc.3 it
requests never was, and every ^0.1.5-rc range (including `latest`'s own)
resolves to it — so installing the checker's `@deepseek-ai/dsh@latest`
fails with ETARGET before any check runs. Pin the checker to `alpha`
(0.1.7-alpha.1), whose closure is complete and which is the release this
cut declares compatibility with.