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 johnqtcg/awesome-skills --skill yt-dlp-downloadergit clone --depth 1 https://github.com/johnqtcg/awesome-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/johnqtcg/awesome-skills/yt-dlp-downloader)<a href="https://agentmods.dev/skills/johnqtcg/awesome-skills/yt-dlp-downloader"><img src="https://agentmods.dev/badge/skills/johnqtcg/awesome-skills/yt-dlp-downloader/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/johnqtcg/awesome-skills/yt-dlp-downloader"><img src="https://agentmods.dev/badge/skills/johnqtcg/awesome-skills/yt-dlp-downloader.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to medium
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 →
- medium Excessive Agency · line 218 Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.Fix: Add human-in-the-loop confirmation for destructive, irreversible, or high-impact operations. Never auto-execute commands that modify files, send data, or alter system state.
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 | $0.00096 | $0.03104 |
| Opus 5 | $0.00048 | $0.01552 |
| Sonnet 5 | $0.00019 | $0.00621 |
| Haiku 4.5 | $0.00010 | $0.00310 |
Grade A, and why
yt-dlp-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 9d 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 — 276 lines — stays where its author put it; the contents beside it link to each section on GitHub.
yt-dlp Downloader
Probe-driven download workflow with explicit format selection and safe retry defaults.
Quick Reference
| If you need to… | Go to |
|---|---|
| Choose scenario (single video / audio / playlist / subtitles / live / SponsorBlock) | §1 Scope Classification |
| Handle specific resolution, codec, HDR, or AV1 | Load references/format-selection-guide.md |
| Handle private / age-gated / login-required content | §5 Auth Safety Gate + Load references/safety-and-recovery.md |
| Fix extraction errors, throttling, or YouTube failures | Load references/safety-and-recovery.md |
| Check the output contract fields (Scenario / Probe / Command…) | §Output Contract |
Mandatory Gates
Gates execute in strict serial order. Any gate failure blocks all subsequent steps.
1) Scope 2) Dependency 3) Ambiguity 4) Probe
Classification → Check → Resolution → Before Download
│ │ │ │
scenario type yt-dlp+ffmpeg unclear? -F / --list-subs
→ classify → verify → STOP+ASK → inspect first
│ │ │ │
5) Auth Safety 6) Execution 7) Execution
Gate → Mode → Integrity
│ │ │
cookies/DRM full/degraded actually ran?
→ enforce → auto-select → report honestly
1) Scope Classification Gate
Map every request into exactly one scenario before proceeding:
| Scenario | Trigger |
|---|---|
| Single video | One URL, default quality or specific format |
| Fixed resolution | User mentions 720p, 1080p, 4K, or specific codec |
| Playlist | Playlist URL, "all videos", "course", "channel" |
| Audio extraction | "mp3", "audio only", "podcast", "music" |
| Subtitles | "subtitles", "captions", "srt", specific language |
| Authenticated | "private", "members-only", "age-gated", login required |
| Live stream | "live", "stream", "premiere", "currently streaming" |
| SponsorBlock | "skip sponsors", "remove intros", "no ads" |
What ships with it
20 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.
- references/anti-examples.md 1.6 KB
- references/decision-rules.md 4.8 KB
- references/format-selection-guide.md 4.3 KB
- references/golden-examples.md 4.2 KB
- references/safety-and-recovery.md 5.1 KB
- references/scenario-templates.md 8.5 KB
- scripts/extract_commands.py 7.3 KB runs code
- scripts/run_regression.sh 2.3 KB runs code
- scripts/tests/golden/audio_extraction.json 252 B
- scripts/tests/golden/authenticated_download.json 236 B
- scripts/tests/golden/format_selection.json 288 B
- scripts/tests/golden/live_stream.json 218 B
- scripts/tests/golden/max_compatibility.json 377 B
- scripts/tests/golden/playlist_download.json 241 B
- scripts/tests/golden/single_video.json 380 B
- scripts/tests/golden/sponsorblock.json 199 B
- scripts/tests/golden/subtitle_download.json 227 B
- scripts/tests/test_flags_against_binary.py 11 KB runs code
- scripts/tests/test_golden_scenarios.py 7.3 KB runs code
- scripts/tests/test_skill_contract.py 18 KB runs code
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.
- 9d ago First seen · 276 lines · 96 tokens per session scan A f19097b14a9f
yt-dlp-downloader is a skill published in the GitHub repository johnqtcg/awesome-skills (30 stars, last pushed yesterday), licensed MIT. It adds 96 tokens to every session and 3,104 once invoked, about $0.0005 per session on Opus 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 2026-09-03.
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