I churned off of Cursor for about a year to use Claude Code from spring 2025 to spring 2026 and I noticed it’d regularly ignore CLAUDE.md & Claude rules. It’s part of why I came back to Cursor. The Cursor harness has produced more reliable results, but the excessive verbosity is still pretty common across harnesses, in my experience.

Yeah, Composer 2 is legitimately so impressive. It is my daily driver right now both on professional and personal projects. I only find myself reaching for 5.3 Codex/GPT 5.4 when exploring a lot of technical documentation or code and for Sonnet/Opus when working on UI. Everything else is Composer.