Opus 规划、Sonnet 执行、Haiku 扫描，Jev 路由微分叉

mirku @mirku21原推发布于 2026.10.20

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THIS IS A PURE F*CKING DIAMOND Anthropic just documented one of the best setups for Claude Code The idea: run Opus 5.5, Sonnet 5.5, and the new Haiku 5.5 together in a tight tripartite loop, each doing only what it was built for Opus-level planning on every big architectural decision, without paying Opus rates for routine code edits or repo searches You just start Claude Code like this: CLAUDE_CODE_SUBAGENT_MODEL=haiku claude --model opusplan here's how it splits: → Opus 5.5 runs plan mode: architects the system blueprint, locks contracts, and signs off on the diff → Sonnet 5.5 executes the plan in the main session: writes the code, applies patches, and runs test suites → Haiku 5.5 swarms the repository in parallel: maps the AST, greps call sites, and parses docs at 340 tok/s with native 1M context → you stop burning Opus context on routine files and keep your main session under 10k tokens Opus only steps in at three moments: → before a plan locks (architectural design) → when the same test fails twice (debugging deadlocks) → before calling it done (signing off on git diff) Opus plans, Sonnet builds, Haiku swarms JEV engineering is the same move one layer down: the forks that need no thinker (which file, which tool, retry or stop) resolve in code in 15ms, and the frontier models only see the ones that split the full tree > Opus 5.5 architects the implementation plan (opusplan mode) > Sonnet 5.5 runs the main execution session and writes code > search maps the repo AST on Haiku 5.5 (340 tok/s, 1M context) > grep locates token call sites on Haiku 5.5 (isolated subagent) > docs pulls API specifications on Haiku 5.5 (0.05x cost) > Opus 5.5 verifies synthesized diff before final sign-off > JEV routes micro-forks in milliseconds paste the tree and this prompt into Claude Code ↓ "Reconfigure my Claude Code setup around this tree: 1. Run with model 'opusplan' so Opus 5.5 plans the architecture and Sonnet 5.5 implements the code 2. Set CLAUDE_CODE_SUBAGENT_MODEL=haiku so all search, grep, and documentation subagents swarm on Haiku 5.5 with its native 1M context 3. Configure fallbackModel to ['sonnet', 'haiku'] in settings.json to guarantee 100% session availability 4. Add one rule to CLAUDE.md: delegate all repository searches and test runs to Haiku 5.5 subagents to keep main context under 10k tokens 5. Route fast deterministic forks (tool choice, path selection, retries) through JEV Show me every change as a diff first. No edits until I say go" ↳ http://code.claude.com/docs/en/model-config save it, it'll come in handy

这条是引用着另一条写的：x.com/mirku21/status/2098836008468992471