chronoforge 是做什么的？
Analyze and recreate long source videos as causally faithful generative productions using source-video evidence, reference-image generation, fixed-duration video models, deterministic trimming/assembly, resumable paid-job ledgers, and layered media QA. Use when Codex must replicate, remake, reenact, extend, localize, or reconstruct a video longer than one generation-model clip; preserve story progression, causal actions, character/scene continuity, prop state, timing, audio intent, and editorial