2026-11-12 Heimdall Step-up: build the authorize URL before claiming the launch (a refused step-up no longer burns the state); pin the strict step_up parse with a signed forgery; document backend_callback and mixed-version limits ... Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com> 673713a015 View at this point in history 2026-11-12 23:21:12 +00:00 Heimdall Opt-in sign_in step-up: app-authenticated, signed-state flag, provider re-auth parameters, typed refusal ... Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com> 7a69d7567b View at this point in history 2026-11-12 23:10:27 +00:00