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按 plan ①②③④ 定稿(用户确认): - reviewer 三档统一 fable-5(不被 project.model 降档,保复审严格度) - planner hard 拆解 opus→fable-5(最烧脑用最强档);medium=opus/easy=sonnet 不变 - conflict 固定 fable-5(解冲突恒用最强档) - MODEL_FALLBACK_CHAIN: [fable-5, opus-4-8, sonnet-4-6](fable 置链首) - executor 档不变(per plan ②);CLAUDE.md 档位表同步更正 Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>