Claude Code Skills Marketplace is a collection and marketplace of skills, plugins, agents, and instructions that extend Claude Code with specialized development workflows. It is for developers who want to install existing workflows or create, validate, and package their own Claude Code skills.
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.
git clone --depth 1 https://github.com/daymade/claude-code-skillsWrote 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/plugins/daymade/claude-code-skills/promptfoo-evaluation)<a href="https://agentmods.dev/plugins/daymade/claude-code-skills/promptfoo-evaluation"><img src="https://agentmods.dev/badge/plugins/daymade/claude-code-skills/promptfoo-evaluation.svg" alt="Measured on agentmods" height="20"></a>Grade A, and why
promptfoo-evaluation 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 4d 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.
What it actually says
{
"name": "promptfoo-evaluation",
"description": "Configures and runs LLM evaluation using Promptfoo framework. Use when setting up prompt testing, creating evaluation configs (promptfooconfig.yaml), writing Python custom assertions, implementing llm-rubric for LLM-as-judge, or managing few-shot examples in prompts. Triggers on keywords like promptfoo, eval, LLM evaluation, prompt testing, or model comparison",
"source": "./promptfoo-evaluation",
"strict": false,
"version": "1.1.0",
"category": "developer-tools",
"keywords": [
"promptfoo",
"evaluation",
"llm-testing",
"prompt-testing",
"assertions",
"llm-rubric",
"few-shot",
"model-comparison"
]
}What ships with it
1 file beside marketplace.json#promptfoo-evaluation 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.
- 4d ago First seen · 18 lines scan A 571b120cd272
promptfoo-evaluation is a plugin published in the GitHub repository daymade/claude-code-skills (1,381 stars, last pushed today), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. 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 2026-09-03.
Other plugins, from other repositories
llm-testing-expert
Evaluation strategies, prompt engineering, red teaming, and regression testing for LLMs.
magic-words
Finds the named technique your problem needs and folds its phrasing into the request before the work starts. Hundreds of named techniques, ranked locally, no network.
promptkitty
Assemble PromptKit prompts and author provider-native agent instructions.
prompt-engineering-expert
Designing effective prompts: structure, few-shot, chain-of-thought, output formatting, and evaluation.
prompthub
Publish and manage PromptHub prompts from Claude Code; organize a prompt before uploading.
promptAnalysis-plugin
A tool that extracts prompts from a project and analyzes how the related code implements them. A prompt is the instruction given to an AI system.