Mercury Skills

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An open-source library of SKILL.md playbooks for AI agents. Browse and install on skills.mercuryagent.sh, or pull them directly from the Mercury Agent CLI.

132 skills across 23 categories — hand-curated, production-ready, and compatible with every major agent: Mercury, Claude Code, Codex CLI, OpenClaw, Hermes, Cursor, and Gemini CLI.

Quick Start

From the Mercury CLI (recommended)

# List what's available
mercury skills search "react patterns"

# Install one skill
mercury skills install frontend/react-patterns

# Install several at once
mercury skills install ai-ml/prompt-engineering devops/docker security/threat-modeling

Installed skills land in ~/.mercury/skills/<category>/<slug>/SKILL.md and are picked up automatically by your agent.

From the web

Open skills.mercuryagent.sh, pick a skill, copy the install line for your agent — every skill page ships ready-made install steps for Mercury, Claude Code, Codex, OpenClaw, Hermes, and "any other agent that understands SKILL.md".

Clone the whole library

git clone https://github.com/cosmicstack-labs/mercury-agent-skills.git

Drop individual skills into your agent's skills directory:

Why Mercury Skills?

Browse on the Web

skills.mercuryagent.sh is the canonical browse-and-install surface for the library. It serves:

• A searchable, categorized index of every skill in this repo
• A trending leaderboard ranked by likes and installs
• Per-skill detail pages with the full SKILL.md, install steps for every supported agent, and a copy-paste-ready install command
• A bookmarking system so you can save skills for later (local, no account required)
• Social share cards with per-skill OpenGraph imagery

It also exposes a public JSON feed at /api/feed.json and per-skill JSON at /api/skills/<category>/<slug> for tooling builders.

Categories

See CATALOG.md for the full skill-by-skill index.

Skill Structure

Every skill is a single SKILL.md file with YAML frontmatter and a markdown body:

---
name: skill-name
description: 'What this skill does and when to use it'
metadata:
  author: cosmicstack-labs
  version: 1.0.0
  category: development
  tags: [clean-code, refactoring, best-practices]
---

# Skill Name

Full instructions, frameworks, scoring rubrics, and actionable guidance.

The format is intentionally minimal so any agent runtime can parse it without custom tooling. See CONTRIBUTING.md for the authoring standard.

Try Mercury Agent

These skills are built for Mercury Agent — the agent runtime that consumes them natively.

• Second Brain — persistent memory that learns from every session
• Skill system — load, version, and update skills from this registry directly
• Permission guardrails — safe by design, auditable by default
• Token budgets — keep AI spend predictable
• Multi-channel — CLI, Telegram, and web; same agent, same memory

# Install Mercury Agent
npm install -g @cosmicstack/mercury-agent

# Pull a skill into your agent
mercury skills install ai-ml/prompt-engineering

# Browse what you have
mercury skills list

Get started with Mercury →

Ecosystem

Built and maintained by Cosmic Stack.

Contributing

We accept new skills, fixes, and refinements via pull request.

• Author a skill — see the standard in CONTRIBUTING.md
• Fix or improve an existing skill — open a PR with a clear changelog note
• Request a category — open an issue with the proposed scope

Every merged contribution lands on skills.mercuryagent.sh within the hour via an automated sync.

License

MIT — see LICENSE.

_{Built by Cosmic Stack · Powered by Mercury Agent}