Codex vs Claude Code
Same shape, different reflexes. Knowing each tool's bias makes you faster in both.
Both tools share the agentic loop: read, edit, run, observe. Where they differ is how trust is expressed. Claude Code gates individual actions — approval prompts per risky tool call, allowlists you grow over time. Codex sets trust per session: a sandbox plus an approval mode (Read Only / Auto / Full Access) you choose before work starts. Same safety goals, different grain.
For mobile scaffolding, Auto mode is usually the right fit: generating screens, wiring navigation, installing packages — all benefit from fewer interruptions inside the sandbox. For shared infrastructure or production migrations, drop to Read Only and plan first — or reach for Claude Code's per-action gates.
The skill is using both for what they're good at, not picking sides.