Codex Automated Long Video Pipeline

subject_definitions: <Subject 1> is Zhangsun Wuji from the first reference image: male Tang statesman and imperial relative, composed but tense, formal official robe, intelligent cautious eyes. He is not Empress Zhangsun. <Subject 2> is Emperor Li Shimin from the second reference image: mature Zhenguan emperor, muted ocher-red robe, black futou, beard, grave authority. summary: [reference generation] Zhangsun Wuji brings a half cord found in his sleeve; Li Shimin sees black wax like coffin sealing, making the missing seal case more sinister. retention_analysis: <Subject 1> (appears in [Shot 1], [Shot 3]): fully_preserved - Zhangsun Wuji remains a male minister, not the empress. <Subject 2> (appears in [Shot 2], [Shot 4], [Shot 5]): fully_preserved - Li Shimin remains the only emperor. detailed_description: Inner palace side room, cold dawn, a short black-waxed cord on a tray, all symbols unreadable. [Shot 1] Close-up of <Subject 1> alone, presenting the cord with both hands. <Subject 1> (S1) says, <d>[Chinese] 臣袖中，多了这个。</d> [Shot 2] At 00:03.500, close-up of <Subject 2> alone, staring at the cord. <Subject 2> (S2) says, <d>[Chinese] 谁放的？</d> [Shot 3] At 00:06.500, cut to <Subject 1>, fearful but honest. <Subject 1> (S1) says, <d>[Chinese] 臣若知道，就不敢来见陛下了。</d> [Shot 4] At 00:10.500, insert of <Subject 2>'s fingers lifting the cord; black wax flakes fall. <Subject 2> (S2) says, <d>[Chinese] 这不是御印封绳。</d> [Shot 5] At 00:13.500, close-up of <Subject 1>. <Subject 1> (S1) says, <d>[Chinese] 像是封棺的蜡。</d> At 00:17.000, close-up of <Subject 2>, chilled by the implication. <Subject 2> (S2) says, <d>[Chinese] 他不是要开门，是要埋人。</d> overall_soundscape: Tray placed on wood, wax flake falling, low room tone, tense breathing. non_diegetic_music: A very low cello note with a slow drum heartbeat. Negative: no subtitles, no readable text, no wrong speaker, no identity swap, no duplicate emperor, Zhangsun Wuji is male.