Check and install prerequisites for Cyrus — Node.js, jq, gh CLI, and the cyrus-ai npm package.

CRITICAL: Never use Read , Edit , or Write tools on ~/.cyrus/.env or any file inside ~/.cyrus/ . Use only Bash commands ( grep , printf , etc.) to interact with env files — secrets must never be read into the conversation context. Setup Prerequisites Checks system prerequisites and installs cyrus ai . Step 1: Detect Package Manager If the user hasn't already specified their preferred package manager, ask: Which package manager do you prefer? npm, pnpm, bun, or yarn? Store the answer for use in this and subsequent skills. Step 2: Check System Dependencies Run the following checks and report results: For each missing dependency, provide the install command: Dependency macOS Linux/Ubuntu Node.js brew install node curl fsSL https://deb.nodesource.com/setup 22.x \ sudo E bash && sudo apt install y nodejs jq brew install jq sudo apt install y jq gh brew install gh See https://github.com/cli/cli/blob/trunk/docs/install linux.md If all dependencies are present, print a checkmark for each and continue. If any are missing, offer to install them (detect OS via uname ). Wait for user confirmation before installing. Step 3: Check for agent browser (Optional) If the user selected any integration surface (Linear, GitHub, Slack), check for agent browser : If installed , ensure it's up to date: If not found , inform the user: agent browser is optional but enables automated app creation for Linear/GitHub/Slack. Without it, you'll be guided through manual setup steps instead. Install with: npm install g agent browser Do NOT block on this — it's optional. Note whether it's available for downstream skills. Step 4: Install cyrus ai Check if already installed: If not found, install using the user's preferred package manager: Verify installation: Step 5: Ensure ~/.cyrus directory exists If ~/.cyrus/.env already exists, note it and inform the user that existing values will be preserved. Completion Print a summary:

cyrus-setup-prerequisites