Codex vs Claude Code

Both tools share the agentic loop: read, edit, run, observe. Where they differ is reflexes. Claude Code asks more, errs toward small steps, and treats destructive actions as approval-required by default. Codex acts more, prefers larger sweeping edits, and assumes you've set the guardrails you want.

For mobile work specifically, Codex's defaults are usually the right fit: scaffolding a screen, generating boilerplate, wiring up navigation — all benefit from less hand-holding. For shared infrastructure or production migrations, the opposite — Claude Code's deliberation pays off.

The skill is using both for what they're good at, not picking sides.