jgd                     JSON Graphics Device
jgd_begin_group         Begin a drawing group (experimental)
jgd_discover            Discover a running jgd server
jgd_end_group           End a drawing group (experimental)
jgd_ext                 Set extended graphics context (experimental)
jgd_frame_ext           Set frame-level extension fields (experimental)
jgd_server_info         Get server information
jgd_spec                jgd JSONL Protocol Specification
with_jgd_ext            Scoped extended graphics context (experimental)
with_jgd_frame_ext      Scoped frame-level extension fields
                        (experimental)
with_jgd_group          Scoped drawing group (experimental)
