diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..faf5bef
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,35 @@
+# Notes for our reference. We will remove this before merging to master.
+# multiboot_header.S is needed to make your binary Multiboot2-compliant.
+# Use x86_64-elf-* toolchain or adapt to your toolchain names.
+AS = x86_64-elf-as
+CC = x86_64-elf-gcc
+LD = x86_64-elf-ld
+OBJCOPY = x86_64-elf-objcopy
+
+CFLAGS = -m64 -ffreestanding -O2 -Wall -Wextra -fno-pic -fno-stack-protector -fno-builtin
+LDFLAGS = -T link.ld
+
+all: iso/boot/kernel.elf plug-os.iso
+
+kernel.o: kernel.c
+	$(CC) $(CFLAGS) -c kernel.c -o kernel.o
+
+entry.o: entry.S
+	$(AS) --64 entry.S -o entry.o
+
+multiboot_header.o: multiboot_header.S
+	$(AS) multiboot_header.S -o multiboot_header.o
+
+kernel.elf: multiboot_header.o entry.o kernel.o
+	$(LD) $(LDFLAGS) -o kernel.elf multiboot_header.o entry.o kernel.o
+
+iso/boot/kernel.elf: kernel.elf
+	mkdir -p iso/boot/grub
+	cp kernel.elf iso/boot/
+	cp grub.cfg iso/boot/grub/
+
+os.iso:
+	grub-mkrescue -o os.iso iso/    # on some systems you may need grub2-mkrescue
+
+clean:
+	rm -rf *.o kernel.elf iso os.iso
diff --git a/boot/entry/entry64.S b/boot/entry/entry64.S
new file mode 100644
index 0000000..e69de29
diff --git a/boot/grub/grub.cfg b/boot/grub/grub.cfg
index 84edf63..fccb2eb 100644
--- a/boot/grub/grub.cfg
+++ b/boot/grub/grub.cfg
@@ -1,7 +1,8 @@
-set timeout=0
+set timeout=3
 set default=0
 
-menuentry "My OS" {
-    multiboot2 /boot/kernel.elf
-    boot
+menuentry "plugOS (multiboot2)" {
+  multiboot2 /boot/kernel.elf
+  module2 /boot/initramfs.img   # optional
+  boot
 }
diff --git a/boot/multiboot/multiboot_header.S b/boot/multiboot/multiboot_header.S
new file mode 100644
index 0000000..ddc62a5
--- /dev/null
+++ b/boot/multiboot/multiboot_header.S
@@ -0,0 +1,12 @@
+    .section .multiboot, "a"
+    .align 8
+    .long 0xE85250D6           /* multiboot2 magic */
+    .long 0                      /* architecture (0 = i386) - fine for GRUB */
+    .long multiboot_header_end - multiboot_header /* header length placeholder */
+    .long 0                      /* checksum placeholder (computed at link or filled later) */
+
+    /* --- tags go here (info request, entry address, etc). Example: end tag --- */
+    .long 0                      /* tag type = end (0) */
+    .long 8                      /* size = 8 (tag header size) */
+
+multiboot_header_end:
diff --git a/boot/multiboot/multiboot_specs.txt b/boot/multiboot/multiboot_specs.txt
new file mode 100644
index 0000000..01fb637
--- /dev/null
+++ b/boot/multiboot/multiboot_specs.txt
@@ -0,0 +1 @@
+Here we will store our notes
\ No newline at end of file
diff --git a/docs/project_structure.txt b/docs/project_structure.txt
new file mode 100644
index 0000000..0ae551c
--- /dev/null
+++ b/docs/project_structure.txt
@@ -0,0 +1,72 @@
+myos/
+│
+├── build/                 # All temporary/generated build artifacts go here.
+│   ├── iso/               # GRUB-ready ISO tree (boot/, grub/, kernel.elf, etc.)
+│   └── obj/               # Object files (.o)
+│
+├── boot/                  # Bootloader-related code
+│   ├── grub/              # GRUB config
+│   │   └── grub.cfg
+│   ├── multiboot/         # Multiboot2 header and support files
+│   │   ├── multiboot_header.S
+│   │   └── multiboot_specs.txt   # (optional notes for yourself)
+│   └── entry/             # CPU entry, long-mode switch, early platform code
+│       ├── entry32.S
+│       └── entry64.S
+│
+├── kernel/                # Kernel proper
+│   ├── arch/              # Architecture-specific code (x86_64)
+│   │   └── x86_64/
+│   │       ├── mm/        # Paging, PML4 setup, frame allocator
+│   │       │   ├── paging.c
+│   │       │   └── paging.h
+│   │       ├── interrupts/
+│   │       │   ├── idt.c
+│   │       │   ├── idt.h
+│   │       │   ├── isr.S
+│   │       │   └── irq.c
+│   │       ├── gdt/
+│   │       │   ├── gdt.c
+│   │       │   └── gdt.h
+│   │       ├── cpufeatures.c
+│   │       └── cpufeatures.h
+│   │
+│   ├── drivers/           # Hardware drivers (framebuffer, keyboard, rtc…)
+│   │   ├── framebuffer.c
+│   │   ├── keyboard.c
+│   │   └── pci.c
+│   │
+│   ├── fs/                # Filesystems (VFS, ext2, initrd parsing)
+│   │   ├── vfs.c
+│   │   └── vfs.h
+│   │
+│   ├── lib/               # Kernel-side libs (string/mem, logging, util)
+│   │   ├── string.c
+│   │   ├── memory.c
+│   │   └── panic.c
+│   │
+│   ├── scheduler/         # (Future) tasking, context switch, user mode
+│   │   ├── task.c
+│   │   └── task.h
+│   │
+│   ├── kernel.c           # Main entry point (kernel_main)
+│   └── kernel.h
+│
+├── scripts/               # Utility scripts for building/toolchain/ISO
+│   ├── build_iso.sh
+│   ├── run_qemu.sh
+│   └── debug_gdb.sh
+│
+├── toolchain/             # Cross-compiler build scripts or prebuilts
+│   ├── build_gcc.sh
+│   ├── build_binutils.sh
+│   └── README.md
+│
+├── include/               # Shared headers
+│   ├── stdint.h
+│   ├── stdbool.h
+│   └── common.h
+│
+├── link.ld                # Kernel linker script
+├── Makefile               # Top-level build orchestration
+└── README.md