Add Tea CLI documentation for Gitea issue tracking

AGENTS.md

@@ -172,6 +172,32 @@ Creates an ISO suitable for Ventoy and other USB boot tools in `./result/iso/`.
 - **Garbage collection**: Automatic, deletes older than 10 days
 - **Unfree packages**: Allowed globally
 
+## Issue Tracking (Gitea)
+
+**Tea CLI for Gitea:**
+```bash
+# Note: When using tea CLI, you must specify --repo johno/nixos-configs
+# The CLI doesn't automatically detect the repo from git remote
+
+# List all issues (open by default)
+tea issues --repo johno/nixos-configs
+
+# List closed issues
+tea issues --repo johno/nixos-configs --state closed
+
+# View specific issue
+tea issue --repo johno/nixos-configs 2
+
+# Create new issue
+tea issues create --repo johno/nixos-configs --title "Issue title" --body "Description"
+
+# Add comment to issue
+tea comment --repo johno/nixos-configs 2 "Comment text"
+
+# Close issue (note: 'issues' is plural, issue number comes last)
+tea issues close --repo johno/nixos-configs 2
+```
+
 ## Important Notes
 
 - **Sudo access**: Claude Code does not have sudo access. Ask the user to run elevated commands like `sudo nixos-rebuild switch`