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/youtube-downloader)<a href="https://agentmods.dev/plugins/daymade/claude-code-skills/youtube-downloader"><img src="https://agentmods.dev/badge/plugins/daymade/claude-code-skills/youtube-downloader.svg" alt="Measured on agentmods" height="20"></a>Grade A, and why
youtube-downloader 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 2d 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": "youtube-downloader",
"description": "Download YouTube videos and HLS streams (m3u8) from platforms like Mux, Vimeo, etc. using yt-dlp and ffmpeg. Use when users request downloading videos, extracting audio, handling protected streams with authentication headers, or troubleshooting download issues like nsig extraction failures, 403 errors, or cookie extraction problems",
"source": "./youtube-downloader",
"strict": false,
"version": "1.1.1",
"category": "utilities",
"keywords": [
"youtube",
"yt-dlp",
"video-download",
"audio-extraction",
"mp3",
"download",
"hls",
"m3u8",
"ffmpeg",
"streaming",
"mux",
"vimeo"
]
}What ships with it
1 file beside marketplace.json#youtube-downloader 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.
- 2d ago Changed 7cde19a5b2cf
- 4d ago First seen · 22 lines scan A 8eb4d138b51c
youtube-downloader 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
generate-video
Generate crisp, perfectly smooth MP4 videos from web pages and animated visualizations using deterministic CDP frame-stepping and ffmpeg.
export-presentation
Exports HTML slide presentations to PDF or PNG screenshots using browser automation. Companion to the slides-presentation plugin.
screencast
Record a demo video of a web-app flow: browser chrome, synthetic cursor, captions, mp4 from a declarative YAML scenario.
toolpiper
Connects Claude Code to ToolPiper, the on-device AI platform for macOS: local LLM inference, speech to text, vision and OCR, browser automation, video editing, and system control through one loopback MCP server.
record-web-gif
Record a running web app (dev server or live URL) to a clean GIF via puppeteer-core + system Chrome + ffmpeg; handles the headless WebGL/canvas blank-frame gotcha.
video-extract
Download videos from any website and optionally send them to a Jellyfin server. Supports YouTube, Vimeo, Twitter/X, TikTok, Instagram, Reddit, Twitch, and virtually any platform hosting video content. Downloads directly on the Jellyfin host over SSH (or locally to /tmp + SCP as fallback), triggers a Jellyfin library…