Auto blog post addition.

flake.nix

@@ -95,9 +95,37 @@
           '';
         };
 
+        new-post = pkgs.writeShellApplication {
+          name = "new-post";
+          runtimeInputs = [ pkgs.coreutils pkgs.gnused ];
+          text = ''
+            if [ $# -eq 0 ]; then
+              echo "Usage: new-post \"Post Title\""
+              exit 1
+            fi
+            title="$*"
+            slug=$(echo "$title" | tr '[:upper:]' '[:lower:]' | sed 's/[^a-z0-9]/-/g' | sed 's/-\+/-/g' | sed 's/^-//;s/-$//')
+            date=$(date +%Y-%m-%d)
+            filename="content/blog/''${date}-''${slug}.org"
+            mkdir -p content/blog
+            cat > "$filename" <<EOF
+#+TITLE: $title
+#+DATE: $date
+
+*
+
+EOF
+            echo "Created: $filename"
+          '';
+        };
+
       in {
         packages.default = site;
 
+        devShells.default = pkgs.mkShell {
+          packages = [ new-post ];
+        };
+
         apps = {
           default = {
             type = "app";