diff --git a/config/redbear-full-grub.toml b/config/redbear-full-grub.toml
new file mode 100644
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+++ b/config/redbear-full-grub.toml
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+# Red Bear OS Full Configuration with GRUB Boot Manager
+# Desktop + RBOS branding + GRUB chainload
+#
+# Build: make all CONFIG_NAME=redbear-full-grub
+#
+# This config adds GRUB as boot manager (Phase 2 installer-native).
+# GRUB presents a menu and chainloads the Redox bootloader.
+# Requires: efi_partition_size >= 8 (16 recommended for GRUB + Redox bootloader + margin)
+
+include = ["redbear-full.toml"]
+
+[general]
+bootloader = "grub"
+efi_partition_size = 16