Re-Planning the Incident for a Three-Person Team

The case study is told as a single engineer working one continuous Claude Code session. Suppose instead a team of three engineers picks up the same ticket together and decides to coordinate the work using an agent team (a lead agent supervising peer sessions, with a shared task list and mailbox messaging) rather than one person running subagents sequentially.

1. Propose a task split across three teammates that covers the same ground as Phases 2 through 5 of the case study (exploration, wrong turn / revised hypothesis, implementation, generalization).
2. Identify at least one point in your split where two teammates could plausibly edit overlapping files, and explain how you'd avoid that collision.
3. Is an agent team actually a better fit for this incident than the single-session-plus-subagents approach the case study used, or would you keep the original approach for the first three engineers picking this up together? Justify your answer using a property of agent teams, not just "more people means more parallelism."