Compare two AI tools side by side
Put any two skills or MCP servers next to each other: risk grade, what each can access, how popular it is, and how to install it.
| What | cursor-rules | agent-rules-books |
|---|---|---|
| Risk grade | CC · Moderate risk signals Based on public adoption and transparency signals as of Oct 22, 2026. Our opinion, not a code audit or security guarantee. | CC · Moderate risk signals Based on public adoption and transparency signals as of Oct 16, 2026. Our opinion, not a code audit or security guarantee. |
| Type | AI agent skill | AI agent skill |
| Est. context load | ~50 tokens idle · ~450 tokens when active (on-demand skill) | ~69 tokens idle · ~500 tokens when active (on-demand skill) |
| GitHub stars | 1.9k | 3.1k |
| Weekly npm downloads | — | — |
| Local files | No local folder access noted | No local folder access noted |
| Command execution | No shell command runner noted | No shell command runner noted |
| Network reach | Connects to outside service API | Connects to outside service API |
| Credentials | No API token required | No API token required |
| Package source | GitHub (flyeric0212/cursor-rules) | GitHub (ciembor/agent-rules-books) |
| Install command | Source repo only | Source repo only |
| Bottom line | Rules are guidance files, not security controls; malicious or poisoned rules can trick Cursor into unsafe behavior, and auto-fetching rules from untrusted sources adds supply-chain risk. | agent-rules-books (agent skill) requires careful permission scoping — prompt injection: Agent rules embedded in system prompts could be manipulated if user inputs are not properly sanitized, potentially causing agents to ignore governance guidelines. |
Based on public adoption and transparency signals as of Oct 28, 2026. Our opinion, not a code audit or security guarantee.
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