Hi, I'm Mike Hadlow the creator of SAML Proxy. I first built a version of this for a previous employer, a B2B SaaS with hundreds of customers configured to log in via AWS Cognito and Auth0 using SSO SAML connections. The company wanted to migrate to Clerk, but discovered it was almost impossible to co-ordinate hundreds of customers to update their SAML IdP configuration at the same time. I built a SAML Proxy to migrate them all with just two DNS switches. This project is an open-source distillation of all I leant doing that. It shows a runnable example of a SAML Proxy, with an open-source SP and IdP thrown in for free.