Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/jianshuo/claude-skillsnpx agentmods add skills/jianshuo/claude-skills/wjs-overlaying-videoWrote 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/jianshuo/claude-skills/wjs-overlaying-video)<a href="https://agentmods.dev/skills/jianshuo/claude-skills/wjs-overlaying-video"><img src="https://agentmods.dev/badge/skills/jianshuo/claude-skills/wjs-overlaying-video/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/jianshuo/claude-skills/wjs-overlaying-video"><img src="https://agentmods.dev/badge/skills/jianshuo/claude-skills/wjs-overlaying-video.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 6 findings, 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 MCP Rug Pull · line 500 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
- medium MCP Rug Pull · line 501 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
- medium MCP Rug Pull · line 502 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
- medium MCP Rug Pull · line 558 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
- medium MCP Rug Pull · line 559 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
- medium Rogue Agent · line 602 Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.Fix: Remove any persistence mechanisms (cron jobs, startup scripts, state files). Skills should not maintain state across sessions without explicit user consent.
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 | $0.00167 | $0.08134 |
| Opus 5.5 | $0.00067 | $0.03254 |
| Sonnet 5.5 | $0.00033 | $0.01627 |
| Haiku 4.5 | $0.00017 | $0.00813 |
Grade A, and why
wjs-overlaying-video 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 — 628 lines — stays where its author put it; the contents beside it link to each section on GitHub.
wjs-overlaying-video
Post-production for a video clip: cover, captions, illustrations, CTA, custom motion graphics — all composed in ONE HyperFrames project and rendered in a SINGLE final encode. No cascade of decodes/re-encodes (each cascade pass degrades quality and burns time).
When to use
- Downstream of
/wjs-segmenting-video— the segmentation skill hands you cropped clips + per-clip SRTs; this skill turns them into upload-ready MP4s with cover/captions/illustrations/CTA. - User has a finished video and wants to dress it up with motion graphics: opening hook, key-quote callout, closing slogan, chapter cards, AI-generated cover as first frame.
- User wants HTML/CSS-quality captions on a video (kinetic word-by-word highlighting, custom fonts, large outlined text, seekable per cue).
- User wants illustration overlays at specific hook moments — diagrams, big text emphasis, flow charts.
Don't use for:
- Splitting one long video into clips → use
/wjs-segmenting-video. - Creating the source SRT → use
/wjs-transcribing-audio(then/wjs-translating-subtitlesif you need a different language). - Full HyperFrames productions where the source isn't a fixed video →
use
hyperframesdirectly. - 微信视频号 / 抖音 upload (no public API for those) → this skill produces the MP4; upload is manual.
What this skill IS — and IS NOT
| Is | Is not |
|---|---|
| Everything that goes ON TOP of a video clip: cover, caption, chapter, illustration, CTA | Cutting / cropping a video (that's /wjs-segmenting-video + /wjs-reframing-video) |
| One HyperFrames composition per clip = ONE final encode | A multi-step decode/encode cascade |
cover is the literal first frame of the output (platforms auto-pick it as thumbnail) |
A separate thumbnail file the user uploads alongside |
Captions are HTML/CSS — -webkit-text-stroke for white-on-anything readability |
libass burn-in (deprecated) |
Illustrations: re-usable stack / hammer patterns + custom escape hatch |
One bespoke HTML/CSS per illustration without re-use |
| AI covers regenerated at native target aspect (1024×1792 for vertical, 1536×1024 for horizontal) | Single 1024×1536 default that letterboxes or crops on the platform |
What ships with it
6 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 · 628 lines · 167 tokens per session scan A 3c7ff08c2110
wjs-overlaying-video is a skill published in the GitHub repository jianshuo/claude-skills (137 stars, last pushed yesterday), licensed MIT. It adds 167 tokens to every session and 8,134 once invoked, about $0.0007 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.
wjs-overlaying-video compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| wjs-overlaying-videojianshuo/claude-skills | Skill | 137 | yesterday | MIT | A | 167 | Claude Code, Codex |
| exploratory-data-analysisK-Dense-AI/scientific-agent-skills | Skill | 56k | 4d ago | MIT | A | 83 | Claude Code |
| webhook-managementhoangsonww/Claude-Code-Agent-Monitor | Skill | 1.1k | yesterday | MIT | A | 56 | Claude Code, Codex |
| gesellschaftsrechtliche-satzungen-agbKlotzkette/claude-fuer-deutsches-recht | Skill | 1.8k | yesterday | Apache-2.0 | A | 69 | Claude Code |
| accessibility-patternsvibeeval/vibecosystem | Skill | 539 | 2d ago | MIT | A | 24 | Claude Code, Codex |
| design-reviewjezweb/claude-skills | Skill | 1.1k | 28d ago | MIT | A | 108 | Claude Code |
| react-patternsjezweb/claude-skills | Skill | 1.1k | 28d ago | MIT | A | 110 | Claude Code |