A new engineer reports that Claude Code ignores the team's API naming conventions in their sessions. The tech lead who set up Claude Code for the team sees the conventions applied every time. Both are on the latest main branch. What is the most likely root cause?

Answer: B — The conventions live in the lead's ~/.claude/CLAUDE.md, which git never shares

User-level instructions in ~/.claude/CLAUDE.md apply only to that user and are not part of the repository, so a teammate who clones the repo never receives them. Moving the conventions into the project-level CLAUDE.md (or .claude/rules/) and committing it fixes the problem for everyone. (A) doesn't explain a consistent difference between two users. (C) misreads the hierarchy. (D) describes a mechanism that doesn't exist.