vitepress-template

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Installation ​

Prerequisites ​

  • Node.js 20.19.0 or higher — Check your version: node --version

Package Managers ​

npm ​

bash
npm install -g @fission-ai/openspec@latest

pnpm ​

bash
pnpm add -g @fission-ai/openspec@latest

yarn ​

bash
yarn global add @fission-ai/openspec@latest

bun ​

bash
bun add -g @fission-ai/openspec@latest

Nix ​

Run OpenSpec directly without installation:

bash
nix run github:Fission-AI/OpenSpec -- init

Or install to your profile:

bash
nix profile install github:Fission-AI/OpenSpec

Or add to your development environment in flake.nix:

nix
{
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    openspec.url = "github:Fission-AI/OpenSpec";
  };

  outputs = { nixpkgs, openspec, ... }: {
    devShells.x86_64-linux.default = nixpkgs.legacyPackages.x86_64-linux.mkShell {
      buildInputs = [ openspec.packages.x86_64-linux.default ];
    };
  };
}

Verify Installation ​

bash
openspec --version

Next Steps ​

After installing, initialize OpenSpec in your project:

bash
cd your-project
openspec init

See [[[[Getting Started]]]] for a full walkthrough.