Cyrus Setup PrerequisitesCAUTION

The Claude Code background agent for Linear, Slack, Github, GitLab etc. you deploy anywhere. Supports Codex, Cursor, Gemini, and Opencode harnesses too.

The instruction file, verbatim from the audited commit — this is the text the model reads, and the surface the audit's instruction layer examines. Quoted here so you can judge it without cloning anything.

---
name: cyrus-setup-prerequisites
description: 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:

```bash
# Node.js >= 18
node --version

# jq (required for Claude Code parsing)
jq --version

# GitHub CLI (required for GitHub integration)
gh --version
```

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`:

```bash
which agent-browser
```

**If installed**, ensure it's up to date:

```bash
npm update -g agent-browser
```

**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:

```bash
which cyrus
```

If not found, install using the user's preferred package manager:

```bash
# npm
npm install -g cyrus-ai

# pnpm
pnpm install -g cyrus-ai

# bun
bun install -g cyrus-ai

# yarn
yarn global add cyrus-ai
```

Verify installation:

```bash
cyrus --version
```

## Step 5: Ensure ~/.cyrus directory exists

```bash
mkdir -p ~/.cyrus
```

If `~/.cyrus/.env` already exists, note it and inform the user that existing values will be preserved.

## Completion

Print a summary:

```
Prerequisites:
  ✓ Node.js v22.x
  ✓ jq 1.7
  ✓ gh 2.x
  ✓ cyrus-ai installed
  ✓ agent-browser available (or: ⚠ not installed — manual setup mode)
```

CAUTIONgrade B · trust 89/100 Install with care. The audit found things worth knowing before you trust its output.

What the source does

Filesystem

none-observed

Network

none-observed

Shell

none-observed

Dependencies

pinned

Secrets in source

none-found

Findings (5)

.claude/skills/cyrus-setup

.claude/skills/cyrus-setup-claude-auth

.claude/skills/cyrus-setup-endpoint

.claude/skills/cyrus-setup-github

.claude/skills/cyrus-setup-gitlab

Gates applied: no_behavioural_pass.