Usql

Q: What is a Claude Code skill and how does the Usql skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Usql is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Security category. Learn more at https://claudskills.com/learn/what-is-skill-md/.

Category: Security · Sub-category: web-security · Last updated: 2026-06-13

cloud:gcp

Use when the user wants to run ad-hoc SQL against a database from the shell - postgres, mysql, sqlite, mssql, oracle, snowflake, bigquery, redshift, cockroachdb, clickhouse, duckdb, and 20+ more drivers via one binary. Use the universal usql client instead of psql/mysql/sqlite CLIs for ad-hoc SQL.

What this skill does

Usql is a community-contributed Claude Code skill in the web-security sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/usql/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when the user wants to run ad-hoc SQL against a database from the shell - postgres, mysql, sqlite, mssql, oracle, snowflake, bigquery, redshift, cockroachdb, clickhouse, duckdb, and 20+ more drivers via one binary. Use the universal usql client instead of psql/mysql/sqlite CLIs for ad-hoc SQL.

Who uses this skill

The Usql Claude Code skill is built for security engineers, penetration testers, DevSecOps practitioners, and development teams hardening codebases and infrastructure. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 116,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/usql
curl -L https://claudskills.com/skills/usql/SKILL.md \
  -o ~/.claude/skills/usql/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/usql/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/usql/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\usql\SKILL.md on Windows. See the full install guide for step-by-step instructions.

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the Usql Claude Code skill?

Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/usql/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.

What does the Usql skill do?

Is this skill free to install?

Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.

When should I use the Usql skill?

Use Usql when your Claude Code task falls under the Security category — specifically in the web security area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Usql" or describe the task and let Claude pick). Browse related skills at /category/security/.

What is a Claude Code skill and how does the Usql skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Usql is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Security category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Source: https://github.com/moabualruz/fulcrum/blob/4851c447419aac7290b8847b9023616180790a6f/plugins/fulcrum/skills/usql/SKILL.md
License: MIT
Author: moabualruz

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA

moabualruz. (2026). Usql [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/usql/

BibTeX

@misc{usql-2026,
  author    = {moabualruz},
  title     = {Usql [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/usql/}
}

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Badge

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