feat: add gov v1 params

flake.nix

@@ -0,0 +1,110 @@
+{
+  description = "Agoric Cosmos Proposal Builder - Development Environment";
+
+  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};
+
+        # Node.js version - using LTS 20 which is compatible with React 18
+        nodejs = pkgs.nodejs_20;
+
+        # Yarn version specified in package.json
+        yarn = pkgs.yarn.override { inherit nodejs; };
+
+      in
+      {
+        devShells.default = pkgs.mkShell {
+          buildInputs = with pkgs; [
+            # Core development tools
+            nodejs
+            yarn
+
+            # Git for version control
+            git
+
+            # Docker and Docker Compose (for the project's docker setup)
+            docker
+            docker-compose
+
+            # Additional useful tools
+            jq  # Used in package.json scripts
+            curl
+
+            # Development utilities
+            nodePackages.typescript
+            nodePackages.typescript-language-server
+            nodePackages.vscode-langservers-extracted  # HTML/CSS/JSON language servers
+
+            # Testing and linting tools (though these will be installed via yarn)
+            nodePackages.eslint
+            nodePackages.prettier
+          ];
+
+          shellHook = ''
+
+            echo "📦 Node.js version: $(node --version)"
+            echo "🧶 Yarn version: $(yarn --version)"
+            echo ""
+
+            # Set up environment variables
+            export NODE_ENV=development
+
+            # Ensure node_modules/.bin is in PATH for local package binaries
+            export PATH="$PWD/node_modules/.bin:$PATH"
+
+            # Create .envrc for direnv integration (optional but recommended)
+            if [ ! -f .envrc ]; then
+              echo "use flake" > .envrc
+              echo "💡 Created .envrc file for direnv integration"
+              echo "   Run 'direnv allow' to enable automatic environment loading"
+            fi
+          '';
+
+          # Environment variables that might be useful
+          env = {
+            # Ensure npm/yarn uses the correct Node.js version
+            npm_config_nodejs_version = nodejs.version;
+
+            # Disable npm update notifications in development
+            NO_UPDATE_NOTIFIER = "1";
+
+            # Enable Yarn's offline mirror for better reproducibility
+            YARN_ENABLE_OFFLINE_MODE = "false";
+          };
+        };
+
+        # Optional: Add packages that can be built/installed
+        packages = {
+          # You could add custom packages here if needed
+          inherit nodejs yarn;
+        };
+
+        # Optional: Define apps that can be run with `nix run`
+        apps = {
+          dev = {
+            type = "app";
+            program = "${pkgs.writeShellScript "dev" ''
+              cd ${toString ./.}
+              ${yarn}/bin/yarn install
+              ${yarn}/bin/yarn dev
+            ''}";
+          };
+
+          build = {
+            type = "app";
+            program = "${pkgs.writeShellScript "build" ''
+              cd ${toString ./.}
+              ${yarn}/bin/yarn install
+              ${yarn}/bin/yarn build
+            ''}";
+          };
+        };
+      }
+    );
+}