实测：M3.1 Flash 花 17 美分、18.5 分钟把 1564 行单文件拆成 13 个文件
作者用 3 个 subagent（两个读代码、一个验收），先给旧版功能截图并写 Playwright 测试当答案，再逐块拆分、每步跑测试通过才提交，最后用 jscpd 去重、knip 删死代码、把硬编码密钥移入 .env 并轮换；按 API 价共约 17 美分、18.5 分钟。
𝟭𝟳 𝗰𝗲𝗻𝘁𝘀 at API prices. 18.5 minutes. That's all it took M3.1 Flash to split a 1,564-line single-file monster into 13 files and throw in a settings panel. Yes, the mystery model that topped OpenRouter for 10 days. To clean up your own project, have it send out 𝟯 𝗰𝗼𝗽𝗶𝗲𝘀 𝗼𝗳 𝗶𝘁𝘀𝗲𝗹𝗳 (subagents), two to dig through the code and one to check the work: → Before you touch anything, screenshot every feature and write the core flows as Playwright tests that pass on the old version first. That's your answer key → Split one piece at a time and run the tests after each. If they pass, commit. If something breaks, go straight back to the last commit → Run npx jscpd to find copy-pasted code and merge it, run npx knip to find what nothing uses and delete it, and move hard-coded keys into a gitignored .env, then rotate them
这条是引用着另一条写的：x.com/minimax_ai/status/2112150867868541221