Three-tool loop

Research · Plan · Execute · Review

Research

Devin

  • Explore unknown codebases
  • Long-running spikes
  • Async, unblocks you
Plan

Claude Code

  • Plan mode → phased todos
  • Architecture & design
  • All UI work
Execute

Codex

  • Hand off the plan
  • Heavy backend lifts
  • Cheap parallelism
Review

Claude Code

  • Skills: review-pr, security-review
  • Audits the diff before merge
  • Catches what humans miss

Codex is horrible at frontend UI. Keep that in Claude.

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