Codex In-App Browser

Inspect the actual tool list:

• Prefer mcp__cua_repl__js when exposed, following the current runtime below.
• Otherwise, if mcp__node_repl__js is exposed, read the legacy browser instructions.
• If neither is exposed, report the missing capability. Do not start another REPL, install a browser driver, or synthesize MCP calls.

Current runtime: cua_repl

Read the live tool instructions. The tool initializes cua; do not import the old browser client or initialize agent.browsers.