Claude Code + REA multi-model reverse engineering workflow with Jev routing micro-forks
Opus 5.5 only plans and signs off, Haiku maps binaries in parallel, Sonnet rebuilds features in isolated copies, and Jev routes deterministic forks, with a prompt you can paste directly.
Claude Code + REA just unlocked a massive cheat code for reverse engineering. Running full jobs on Opus usually eats your entire subscription limit before the first feature is rebuilt. By orchestrating a multi-model workflow, you can drop your costs to near zero while maintaining top-tier architecture. How it works: - Opus 5.5 writes the master plan and reads only verified results. - Haiku 5.5 maps binaries in parallel. - Sonnet 5.5 rebuilds features in clean-room isolated copies and verifies parity. - JEV routes micro-forks instantly. Opus only wakes up three times: to plan, to review, and to sign off. Command to use in Claude Code after running `npx rea-agents setup`: "Reverse engineer [app] as a workflow: 1. Main session on Opus 5.5 with ultracode. Write the workflow script and read only verified results. 2. Map stage on Haiku 5.5: one agent per binary, REA tools only, no edits. 3. Rebuild stage on Sonnet 5.5: one feature per agent, built from spec in isolated copies. 4. Verify stage: independent verifier agent runs parity tests before anything reaches you. 5. Route deterministic forks through JEV. Show me the script as a diff first. Nothing runs until I say go."
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