- Parse Cookie header in OCaml HTTP server for get-cookie primitive - Stepper saves step-idx to cookie via host-set! FFI on click - Stepper restores from cookie: get-cookie on server, host-get FFI on client - Cache key includes stepper cookie value to avoid stale SSR - registerNative: also update Sx_primitives table for CALL_PRIM dispatch Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>