Investigate an anonymous curl-to-thread flow in a web application. The intended product shape is a guest-created thread that establishes a resumable identity, opens that thread’s detail view, and shows saved thread and member identifiers above the message feed. Current evidence still needs to establish the actual endpoint response, browser destination, session behavior, and whether the guest information card exists. The reusable question is how to trace these boundaries precisely from handlers, session primitives, routes, components, tests, and live browser behavior.

Verified a two-path anonymous onboarding design. The visible curl command targets an authenticated task-start endpoint, while anonymous browser onboarding uses a separate guest endpoint with a short-lived handoff ticket redeemed into a resumable cookie session. The thread detail card is owner-gated and appears above the message feed; it shows a copyable thread identifier but does not currently expose a guest or member identifier. A public visitor view correctly omits the owner card.