add monorepo support

Author: lessuselesss

flake.nix

@@ -0,0 +1,80 @@
+{
+  description = "Eliza - An extensible AI agent framework";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = {
+    self,
+    nixpkgs,
+    flake-utils,
+  }:
+    flake-utils.lib.eachDefaultSystem (
+      system: let
+        pkgs = nixpkgs.legacyPackages.${system};
+      in {
+        packages.default = pkgs.buildNpmPackage {
+          pname = "eliza";
+          version = "0.0.1";
+
+          src = ./.;
+
+          npmDepsHash = "sha256-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=";
+
+          nativeBuildInputs = with pkgs; [
+            nodejs_23
+            python3
+            pkg-config
+            nodePackages.pnpm
+          ];
+
+          buildInputs = with pkgs; [
+            vips
+            ffmpeg
+          ];
+
+          # Use pnpm instead of npm
+          npmPackageManager = "pnpm";
+
+          # Generate package-lock.json for Nix build
+          preBuildPhase = ''
+            export HOME=$(mktemp -d)
+            pnpm install --frozen-lockfile
+          '';
+
+          buildPhase = ''
+            pnpm run build
+          '';
+
+          installPhase = ''
+            mkdir -p $out/bin $out/lib
+            cp -r packages/core/dist/* $out/lib/
+            cat > $out/bin/eliza <<EOF
+            #!/bin/sh
+            exec ${pkgs.nodejs_23}/bin/node $out/lib/index.js "\$@"
+            EOF
+            chmod +x $out/bin/eliza
+          '';
+        };
+
+        devShell = pkgs.mkShell {
+          buildInputs = with pkgs; [
+            nodejs_23
+            python3
+            pkg-config
+            nodePackages.pnpm
+            vips
+            ffmpeg
+            nodePackages.typescript
+            nodePackages.typescript-language-server
+          ];
+
+          shellHook = ''
+            export PATH="$PWD/node_modules/.bin:$PATH"
+          '';
+        };
+      }
+    );
+}