Claude Code 分层模型配置：用 Jev 做毫秒级微分支

ilu4 @ilaavl原推发布于 2026.10.19

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I was burning tokens on grep. Then I changed ONE line. One line, and Claude Code stops burning tokens on routine work: CLAUDE_CODE_SUBAGENT_MODEL=haiku claude --model sonnet My tree: Opus 5.5 · architect on call │ plan · same error twice · final diff │ Sonnet 5.5 · main session (code + fixes) │ JEV · micro-forks in milliseconds │ which file · which tool · retry or stop │ ├─ search → Haiku 5.5 · maps the repo ├─ grep → Haiku 5.5 · finds call sites └─ audit → worktree · isolated diff checks │ Sonnet 5.5 · synthesizes results, applies the patch Launch tips: "env": {"CLAUDE_CODE_SUBAGENT_MODEL": "haiku"} The built-in Explore agent won’t move with this variable alone. Create your own Explore subagent with model: haiku Check which model actually ran: /tasks (v2.1.243+) Haiku isn’t for complex logic or subtle bugs Save it, it’ll come in handy