Document CLI authentication and local search

installation.mdx

@@ -109,6 +109,19 @@
 Port 3000 is already in use. Trying 3001 instead.
 ```
 
+### Search in local preview
+
+By default, search is disabled during local preview. To enable search, log in to
+the CLI first:
+
+```bash
+mint login
+mint dev
+```
+
+When you are logged in, the local preview connects to your project's search index,
+so you can test search behavior as you write.
+
 ## Skip OpenAPI processing
 
 If you have many OpenAPI files, skip OpenAPI file processing during local development to improve performance by using the `--disable-openapi` flag:
@@ -177,6 +190,39 @@
     ```
   </CodeGroup>
 
+## Authentication
+
+Log in to your Mintlify account from the CLI to enable features that require
+a connection to your project, such as [search in local preview](#search-in-local-preview).
+
+### Log in
+
+Authenticate with your Mintlify account:
+
+```bash
+mint login
+```
+
+A browser window opens for you to complete the authentication flow. After you log in,
+your credentials are stored locally so you stay authenticated across sessions.
+
+### Check authentication status
+
+View your current authentication status, including the email and organization associated
+with your account:
+
+```bash
+mint status
+```
+
+### Log out
+
+Remove your stored credentials:
+
+```bash
+mint logout
+```
+
 ## Additional commands
 
 ### Find broken links