ssh your_junos 'show isis database extensive | disp json ' | jq -f isis.jq -r | dot -Tpng | imgcat

isis2dot.jq

def strip_isis_id: .|match("([-\\w]+).00").captures[0].string|gsub("-";"_") ;
def to_dot: ["\(.id) -- {",(.n|join(" ")),"}"]|join("") ;

["strict graph {",
"node [overlap=false]",
(."isis-database-information"[]|."isis-database"[]|select(.level[0].data=="2")|."isis-database-entry"[]|{
    id:(."lsp-id"[0].data|strip_isis_id),
    n:[."isis-neighbor"[]|."is-neighbor-id"[0].data|strip_isis_id],
    p:[."isis-prefix"[]|."address-prefix"[0].data],
    rid:."isis-header"[0]."router-id"[0].data
}|to_dot),
"}"] | join("\n")