Standardizing Surfaces for a 12-Person Team

You're asked to write a rollout plan for standardizing how a 12-person engineering team uses Claude Code. The team currently has a mix: some engineers use the bare CLI, some use VS Code, one uses JetBrains (PyCharm), and permission-mode habits are inconsistent enough that a recent incident involved someone running Accept Edits mode against a shared staging database script.

Write a rollout plan that specifies: what gets standardized at the project/team level versus what stays personal preference, and why. Be concrete about which settings file each standardized rule belongs in.