As someone who uses the two big C's, I can recommend ampcode[0] and Crush[1]+z.ai GLM as an addition.

Amp can do small utility scripts and changes for free (especially if you enable the ads) and Crush+GLM is pretty good at following plans done by Claude or Codex

[0] https://ampcode.com/

[1] https://github.com/charmbracelet/crush