I switch between Claude Code, Codex, and Gemini CLI depending on the day and the task. Each one is genuinely good. Each one also has zero idea what the other one knows. I'd explain a decision to Claude Code — "we're using Postgres here because we need concurrent writes, don't suggest SQLite again" — and it'd remember, because it reads CLAUDE.md . Then I'd switch to Codex for the same repo and it would suggest SQLite. Again. Because nothing I told Claude Code ever made it into whatever contex...