- Added org.osbuild.debian.bootupd stage with A/B partition support
- Created bootupd.toml configuration with atomic update settings
- Implemented systemd service and preset for bootupd
- Added A/B partition configuration for atomic bootloader updates
- Created EFI directory structure for bootupd bootloader management
- Added comprehensive test suite for bootupd stage (2/2 tests passing)
- Created example manifests for both Debian 13 and 14 with bootupd
- Updated README documentation to reflect bootupd implementation
- Updated stage execution order and future roadmap
This completes the modern bootloader management implementation,
providing both traditional GRUB2 and modern bootupd options.
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