1. Non JS based. I've noticed a ton of random bugs/oddities in Claude Code, and now Codex with UI flickering, scaling, user input issues, etc, all from what I believe of trying to do React stuff and writing half-baked LLM produced JS in a CLI application. Using a more appropriate language that is better for CLIs I think would help a lot here (Go or Rust for eg).
2. Customized model selection (eg. OpenRouter, etc).
1. Non JS based. I've noticed a ton of random bugs/oddities in Claude Code, and now Codex with UI flickering, scaling, user input issues, etc, all from what I believe of trying to do React stuff and writing half-baked LLM produced JS in a CLI application. Using a more appropriate language that is better for CLIs I think would help a lot here (Go or Rust for eg).
2. Customized model selection (eg. OpenRouter, etc).
3. Full MCP support.