Codex In-App Browser

The tool is mcp__node_repl__js. It is available in this session.

First: read the official skill

The official skill is authoritative. Read it before any browser work:

~/.codex/plugins/cache/openai-bundled/browser/<version>/skills/control-in-app-browser/SKILL.md

Find the latest <version> directory (for example 26.803.41515).

Bootstrap (once per session)

Send this as ONE line through mcp__node_repl__js:

if (globalThis.agent?.browsers == null) { const { setupBrowserRuntime } = await import("<plugin root>/scripts/browser-client.mjs"); globalThis.agent = await setupBrowserRuntime(); }