html-video is a local tool that turns HTML, CSS, and data into animated MP4 videos using configurable rendering engines and templates. Coding agents use it to create and export videos on a user's machine, with optional AI-generated soundtracks. The catalogue skills operate the tool and its video-generation workflow.
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 nexu-io/html-video --skill frame-bold-signalgit clone --depth 1 https://github.com/nexu-io/html-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/nexu-io/html-video/frame-bold-signal)<a href="https://agentmods.dev/skills/nexu-io/html-video/frame-bold-signal"><img src="https://agentmods.dev/badge/skills/nexu-io/html-video/frame-bold-signal/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/nexu-io/html-video/frame-bold-signal"><img src="https://agentmods.dev/badge/skills/nexu-io/html-video/frame-bold-signal.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00028 | $0.01030 |
| Opus 5 | $0.00014 | $0.00515 |
| Sonnet 5 | $0.00006 | $0.00206 |
| Haiku 4.5 | $0.00003 | $0.00103 |
Grade A, and why
frame-bold-signal 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 12d 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
【模板: 大胆信号卡帧 (Bold Signal)】 【意图】章节/段落分隔 / 大胆 launch 陈述 / 高冲击标题卡。视觉提炼自 frontend-slides 的 Bold Signal 预设 (MIT, © Zara Zhang)。
【画布】1920×1080, 暗底 #1a1a1a + 135° 渐变 (#1a1a1a → #2d2d2d → #1a1a1a)。
【字体】display Archivo Black (900); body Space Grotesk 400/500/700。
【主结构 (时间轴, 默认 4s)】
- 0.2s 左上巨大 section number (
Archivo Black96px, 如01/04, 斜杠后半 opacity 0.3) 从上方 rollIn。 - 0.4s 起 右上 nav breadcrumb 错峰淡入: active 项
#FF5722橙 opacity 1, 其余白 opacity 0.35。 - 0.6s 橙色焦点卡 (
#FF5722, 圆角 36px 仅左侧, 占右 ~1180px) 从 translateX(110%) 滑入, 带橙色柔影。 - 1.15s 卡内 label (uppercase, letter-spacing 4px) fadeUp。
- 1.3s 卡内大标题 (
Archivo Black130px, 深色#1a1a1aon 橙) fadeUp。 - 1.6s 左下 footer (橙色 tick 短条 + system 标签) 淡入。
【配色纪律】暗底灰阶 + 唯一强调色 #FF5722 橙 (焦点卡 / active nav / footer tick)。可换成 coral/vibrant accent 但全片只用一个强调色。卡上文字用深色保证对比。
【内容纪律】
- title 1-2 行, 必须用真实标题, 严禁 lorem ipsum。
- nav 面包屑反映真实章节结构, 第一项 active。
- 动效用
@keyframes,prefers-reduced-motion下全部停在终态。 - 单文件 HTML。
What ships with it
5 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.
- 12d ago First seen · 61 lines · 28 tokens per session scan A 6fee23526ec7
frame-bold-signal is a skill published in the GitHub repository nexu-io/html-video (4,567 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 28 tokens to every session and 1,030 once invoked, about $0.0001 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 2026-08-30.
Other skills, from other repositories
frame-flowchart-sticky
SVG curve connectors, sticky-note nodes, and cursor interaction with a whiteboard-brainstorm feel.
frame-glitch-title
Digital glitch, chromatic offset, and data-corruption title frame for video transitions or cyberpunk heroes.
frame-logo-outro
Segmented logo assembly, glow bloom, and tagline reveal for video outros or brand closing frames.
frame-macos-notification
Realistic macOS notification banner with app icon, title, and body, suited to video overlays or product teasers.
frame-glitch-title
A design template for a glitch-style title frame in Chinese, intended for a video transition, hero image, or cyberpunk graphic. It describes dark backgrounds, distorted lettering, colored offsets, scan lines, noise, and timecode details.
frame-light-leak-cinema
A visual template for a cinematic opening frame or chapter card. It combines warm film light leaks, 35mm-style grain, black letterbox bars, and large serif lettering.