Quien is a new open-source tool from retlehs that does more than standard WHOIS lookups. It bundles DNS records, mail server info, SSL/TLS details, HTTP headers, and tech stack detection into one interactive terminal interface. RDAP is the primary lookup method, with WHOIS fallback for broad TLD coverage. On Hacker News, user johng praised its polished TUI design.
The agent integration is the interesting part. Quien can be added as a skill through skills.sh with `npx skills add retlehs/quien`. It natively outputs JSON via subcommands like `quien dns`, `quien mail`, `quien tls`, and `quien stack`. Structured output matters for LLMs. Agents can parse results programmatically without scraping text.
This is where CLI tools should be heading. You get the interactive TUI for exploratory use, or you drop into scripting mode when you need automation. Every new CLI utility should default to JSON output. Text parsing is fragile and agents deserve better than regex hacks.
Quien sits in the read-only skill category since it only retrieves information without writing to filesystems or modifying systems. That's a safer permission profile for agent execution. The trust model is direct though. You're installing from a GitHub repo and trusting the publisher, not a vetted marketplace. That's fine for personal use but becomes a real question when agents start installing skills autonomously.