[bot] Update login flow docs and add /permissions, /plugins commands (v1.0.76–v1.0.78)

00-quick-start/README.md

@@ -143,17 +143,20 @@ After trusting the folder, you can sign in with your GitHub account.
 > /login
 ```
 
-**What happens next:**
+**What happens next (local terminal):**
 
-1. Copilot CLI displays a one-time code (like `ABCD-1234`)
-2. Your browser opens to GitHub's device authorization page. Sign in to GitHub if you haven't already.
-3. Enter the code when prompted
-4. Select "Authorize" to grant GitHub Copilot CLI access
-5. Return to your terminal - you're now signed in!
+1. Choose to sign into your GitHub.com account or an enterprise account.
+2. Select `Sign in with your browser (recommended)`
+3. Your browser opens automatically to GitHub's authorization page. Sign in to GitHub if you haven't already.
+4. Select "Authorize" to grant GitHub Copilot CLI access.
+5. Return to your terminal — you're now signed in!
 
-<img src="assets/auth-device-flow.png" alt="Device Authorization Flow - showing the 5-step process from terminal login to signed-in confirmation" width="800"/>
-
-*The device authorization flow: your terminal generates a code, you verify it in the browser, and Copilot CLI is authenticated.*
+> 💡 **Remote or headless terminals**: If you're on a remote server or a terminal without a browser (such as SSH), Copilot CLI falls back to the **device code flow** instead. You'll see a one-time code like `ABCD-1234`. Visit [github.com/login/device](https://github.com/login/device) in a browser on another machine and enter the code to complete sign-in. To force a specific flow, use `copilot login --web-flow` to use the browser popup or `copilot login --device-code` to use the code-based flow. You can also pick interactively with `/login`.
+> 
+> <img src="assets/auth-device-flow.png" alt="Device Authorization Flow - showing the 5-step process from terminal login to signed-in confirmation" width="800"/>
+>
+
+*The browser-based flow: your browser opens automatically and you authorize in one click. On remote/headless terminals, a device code is shown instead.*
 
 **Tip**: The sign-in persists across sessions. You only need to do this once unless your token expires or you explicitly sign out.
 
@@ -267,7 +270,7 @@ copilot
 
 ### Browser doesn't open automatically
 
-Manually visit [github.com/login/device](https://github.com/login/device) and enter the code shown in your terminal.
+On remote or headless terminals, the device code flow is used instead. Your terminal will display a one-time code. Visit [github.com/login/device](https://github.com/login/device) and enter the code, then authorize access.
 
 ### Token expired
 

01-setup-and-first-steps/README.md

@@ -410,6 +410,7 @@ That's it for getting started! As you become comfortable, you can explore additi
 | `/env` | Show loaded environment details — what instructions, MCP servers, skills, agents, and plugins are active |
 | `/init` | Initialize Copilot instructions for your repository |
 | `/mcp` | Manage MCP server configuration |
+| `/plugins` | Enable or disable plugins, instructions, agents, LSP servers, and hooks without restarting the session |
 | `/settings` | Open an interactive dialog to browse and edit all user settings in one place |
 | `/skills` | Manage skills for enhanced capabilities |
 
@@ -440,6 +441,7 @@ That's it for getting started! As you become comfortable, you can explore additi
 |---------|--------------|
 | `/add-dir <directory>` | Add a directory to allowed list |
 | `/allow-all [on\|off\|show]` | Auto-approve all permission prompts; use `on` to enable, `off` to disable, `show` to check current status |
+| `/permissions` | Switch between approval modes (interactive, plan, autopilot) for controlling how much Copilot can do without asking |
 | `/yolo` | Quick alias for `/allow-all on` — auto-approves all permission prompts. |
 | `/cwd`, `/cd [directory]` | View or change working directory |
 | `/list-dirs` | Show all allowed directories |