Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add glincker/claude-code-marketplace --skill hello-worldgit clone --depth 1 https://github.com/glincker/claude-code-marketplaceWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/glincker/claude-code-marketplace/hello-world)<a href="https://agentmods.dev/skills/glincker/claude-code-marketplace/hello-world"><img src="https://agentmods.dev/badge/skills/glincker/claude-code-marketplace/hello-world/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/glincker/claude-code-marketplace/hello-world"><img src="https://agentmods.dev/badge/skills/glincker/claude-code-marketplace/hello-world.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00012 | $0.00753 |
| Opus 5.5 | $0.00005 | $0.00301 |
| Sonnet 5.5 | $0.00002 | $0.00151 |
| Haiku 4.5 | $0.00001 | $0.00075 |
Grade A, and why
hello-world scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 113 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Hello World Skill
This is a simple example skill that demonstrates the basic structure and format of a Claude Code skill. It's perfect for learning how skills work!
What This Skill Does
When activated, this skill helps Claude:
- Greet users in a friendly, informative way
- Explain what skills are and how they work
- Provide guidance on next steps
This skill doesn't require any tools, making it the simplest possible example.
Instructions
When this skill is activated:
- Greet the user warmly
- Explain that this is a demonstration of Claude Code skills
- Briefly describe what skills are and how they extend Claude's capabilities
- Suggest exploring other skills in the marketplace
- Offer to help the user create their own skill
Keep the tone friendly, encouraging, and educational.
Examples
Example 1: Basic Activation
User Request: "Use the hello-world skill"
Expected Response: "Hello! I'm using the Hello World skill, which is a simple demonstration of how Claude Code skills work.
Skills are modular capabilities that extend what I can do. Each skill is just a folder with a SKILL.md file that contains instructions for me to follow. This particular skill doesn't need any tools, so it's a great starting point for learning!
The GLINCKER Marketplace has many more skills you can explore:
- Development tools
- Productivity enhancers
- Creative assistants
- And much more!
Would you like to explore other skills, or shall I help you create your own?"
Tool Requirements
This skill requires no tools - it's purely instructional, making it the perfect beginner example.
Limitations
This is an educational skill with no practical functionality:
- It doesn't modify files or execute commands
- It's designed purely for demonstration purposes
- For real work, explore the other skills in the marketplace
Best Practices
This skill demonstrates several best practices:
- Clear frontmatter: All required fields are present
- Minimal permissions: No tools requested (since none are needed)
- Good documentation: Clear explanation of purpose and usage
- Examples provided: Shows expected behavior
- Simple structure: Easy to understand and learn from
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 1mo ago First seen · 113 lines · 12 tokens per session scan A af856ef5a805
hello-world is a skill published in the GitHub repository glincker/claude-code-marketplace (37 stars, last pushed 24d ago), licensed Apache-2.0. It adds 12 tokens to every session and 753 once invoked, about $0.0000 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other skills, from other repositories
hello-world
Selam veren örnek skill. Yeni başlayanlar için template.
advanced-example
Advanced example showing all available metadata fields and complex folder structure.
intermediate-example
An intermediate example with metadata and examples.
claude-md
Create or update CLAUDE.md files following best practices for optimal AI agent onboarding.
doc-generator
Generate comprehensive, accurate API documentation from source code. Use when creating or updating API documentation, generating OpenAPI specs, or when users mention API docs, endpoints, or documentation.
brand-voice
Ensure all communication matches brand voice and tone guidelines. Use when creating marketing copy, customer communications, public-facing content, or when users mention brand voice, tone, or writing style.