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 maystudios/claude-skills --skill link-downloadgit clone --depth 1 https://github.com/maystudios/claude-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/skills/maystudios/claude-skills/link-download)<a href="https://agentmods.dev/skills/maystudios/claude-skills/link-download"><img src="https://agentmods.dev/badge/skills/maystudios/claude-skills/link-download/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/maystudios/claude-skills/link-download"><img src="https://agentmods.dev/badge/skills/maystudios/claude-skills/link-download.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to high
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- high YARA Match · line 43 YARA rule matched a known malware signature (reverse shell, backdoor, ransomware, C2 framework, or info stealer).Fix: Remove the malware payload or compromised file entirely. Investigate how it entered the skill and audit all other artifacts for additional indicators of compromise.
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 | $0.00085 | $0.00650 |
| Opus 5.5 | $0.00034 | $0.00260 |
| Sonnet 5.5 | $0.00017 | $0.00130 |
| Haiku 4.5 | $0.00009 | $0.00065 |
Grade A, and why
link-download 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 2mo 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 — 74 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Video & Audio Download Skill
Download videos as MP4 or extract audio as MP3 from Instagram, YouTube, TikTok, Twitter/X, and 1000+ sites.
Tool
Script: scripts/download.py -- wraps yt-dlp, handles install check, MP4 merging, MP3 extraction, folder creation.
Workflow
- Collect all URLs from the user's request (can be a single URL or a list)
- Determine the format:
- Default: MP4 video
- If user asks for audio/MP3/song/music: use
--mp3
- Determine the output directory:
- No folder specified: use the current working directory
- Folder specified: use it as-is (will be created if missing)
- Run the download script
- Report which files were saved and where
Usage
# Single video as MP4, current directory
python scripts/download.py "https://www.youtube.com/watch?v=..."
# Extract audio as MP3
python scripts/download.py "https://www.youtube.com/watch?v=..." --mp3
# Multiple URLs as MP3 to a specific folder
python scripts/download.py "URL1" "URL2" --mp3 -o "/path/to/output"
# With browser cookies (for private/login-required content)
python scripts/download.py "URL" --cookies-from-browser chrome
Output Filename Pattern
- MP4:
{uploader}_{video_id}.mp4-- e.g.DesignMotion_DUf3nehjIg7.mp4 - MP3:
{uploader}_{video_id}.mp3-- e.g.DesignMotion_DUf3nehjIg7.mp3
Authentication
If a video requires login (private Instagram posts, age-restricted YouTube, etc.):
- Add
--cookies-from-browser chrome(orfirefox,edge,safari) - The user must be logged in to that platform in the specified browser
Supported Platforms (examples)
- YouTube (including playlists -- use
--no-playlistdisabled for full playlists) - Instagram (posts, reels)
- TikTok
- Twitter / X
- Vimeo
- And 1000+ more via yt-dlp
Notes
- yt-dlp is auto-installed if not present
--no-playlistis set by default; remove it from the script call for full playlists- MP4: best quality video + audio merged automatically
- MP3: extracts audio and converts to MP3 (192 kbps) via ffmpeg; ffmpeg must be installed
What ships with it
2 files 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.
- 2mo ago First seen · 74 lines · 85 tokens per session scan A d969778c2d87
link-download is a skill published in the GitHub repository maystudios/claude-skills (26 stars, last pushed 2mo ago), licensed MIT. It adds 85 tokens to every session and 650 once invoked, about $0.0003 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.
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