diff --git a/home/packages/development.nix b/home/packages/development.nix
index 811f5ce..cd564fb 100644
--- a/home/packages/development.nix
+++ b/home/packages/development.nix
@@ -11,5 +11,6 @@
     nil
     nixd
     jujutsu
+    just
   ];
 }
diff --git a/justfile b/justfile
new file mode 100644
index 0000000..cb2bbae
--- /dev/null
+++ b/justfile
@@ -0,0 +1,65 @@
+# Justfile to safely clean up NixOS profiles, keeping only the last 3 generations.
+
+# Default recipe displays the help menu.
+help:
+    @echo "NixOS Profile Cleanup Utility"
+    @echo "============================="
+    @echo "Available recipes:"
+    @echo "  just dry-run             - Safe preview of what will be deleted"
+    @echo "  just clean-system        - Clean system generations and update bootloader (requires sudo)"
+    @echo "  just clean-user          - Clean current user's profile generations"
+    @echo "  just clean-home-manager  - Clean Home Manager generations (if applicable)"
+    @echo "  just clean-all           - Clean everything (System, User, and Home Manager)"
+
+# Dry run to preview changes without deleting anything.
+dry-run:
+    @echo "=== [DRY RUN] System Profile ==="
+    sudo nix-env --profile /nix/var/nix/profiles/system --delete-generations +3 --dry-run
+    @echo "\n=== [DRY RUN] User Profile ==="
+    nix-env --delete-generations +3 --dry-run
+    @echo "\n=== [DRY RUN] Home Manager Profile ==="
+    @if [ -d "$HOME/.local/state/nix/profiles/home-manager" ]; then \
+        nix-env --profile "$HOME/.local/state/nix/profiles/home-manager" --delete-generations +3 --dry-run; \
+    elif [ -d "$HOME/.nix-profile" ]; then \
+        echo "No Home Manager directory found, but user profile exists."; \
+    else \
+        echo "No Home Manager profile detected."; \
+    fi
+
+# Clean system generations (requires sudo).
+clean-system:
+    @echo "--- Cleaning System Profile (SUDO) ---"
+    sudo nix-env --profile /nix/var/nix/profiles/system --delete-generations +3
+    sudo nix-collect-garbage
+    @echo "--- Updating Bootloader Menu ---"
+    sudo nixos-rebuild boot --flake
+
+# Clean user generations (no sudo).
+clean-user:
+    @echo "--- Cleaning User Profile ---"
+    nix-env --delete-generations +3
+    nix-collect-garbage
+
+# Clean Home Manager generations (no sudo).
+clean-home-manager:
+    @echo "--- Cleaning Home Manager Profile ---"
+    @if [ -d "$HOME/.local/state/nix/profiles/home-manager" ]; then \
+        nix-env --profile "$HOME/.local/state/nix/profiles/home-manager" --delete-generations +3; \
+        nix-collect-garbage; \
+    else \
+        echo "No Home Manager profile found. Skipping."; \
+    fi
+
+# Clean everything in one go.
+clean-all: clean-system clean-user clean-home-manager
+    @echo "All cleanups successfully completed!"
+
+# Rebuild.
+rebuild:
+    @echo "--- Rebuilding System ---"
+    sudo nixos-rebuild switch --flake
+
+# Update flake.
+update:
+    @echo "--- Updating Flake ---"
+    sudo nix flake update