# Login

> Sign in to Grok Build for the native harness.

- Skill: `greenpolo/login` (Agent Skill)
- Install (CLI): `npx skillmds@latest add greenpolo/login`
- Raw SKILL.md: https://api.skillmd.com/api/skills/greenpolo/login/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: greenpolo (https://skillmd.com/u/greenpolo)
- Updated: 2026-09-22
- Page: https://skillmd.com/skills/greenpolo/login

---


Tell the user to run the official Grok Build sign-in in their own terminal:

```sh
"$HOME/.local/share/multi-cli/bin/multi" login grok
```

This hands off to `grok login`, which opens the browser flow, or
`grok login --device-auth` on a headless host. Check `/multi-usage` first: it
reports whether a renewable login is already present, in which case no sign-in is
needed. Tell the user that they must relaunch Claude afterward to load the Grok
rows. Never accept, request, read, or print credentials in chat; native
credentials remain owned by `grok`.