If you've ever run `dotnet dev-certs https --trust` on Linux and wondered why your Aspire Redis connections still fail with certificate errors, this is why: the command does basically nothing. It generates the cert but doesn't export it to the system CA directory or run `update-ca-certificates` to rebuild the bundle that applications actually read. This skill walks through the five-point diagnostic (cert existence, trust store files, CA bundle inclusion, environment variables, symlink integrity) and provides a complete recovery script. Especially relevant if you upgraded to Aspire 13.1.0+ where Redis suddenly uses TLS by default. The explanation of how Linux certificate trust actually works is worth reading even if you're not debugging right now.
npx skills add https://github.com/aaronontheweb/dotnet-skills --skill dotnet-devcert-trust