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-build-minimalgit 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-build-minimal)<a href="https://agentmods.dev/skills/nexu-io/html-video/frame-build-minimal"><img src="https://agentmods.dev/badge/skills/nexu-io/html-video/frame-build-minimal/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-build-minimal"><img src="https://agentmods.dev/badge/skills/nexu-io/html-video/frame-build-minimal.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 | $0.00027 | $0.01122 |
| Opus 5 | $0.00014 | $0.00561 |
| Sonnet 5 | $0.00005 | $0.00224 |
| Haiku 4.5 | $0.00003 | $0.00112 |
Grade A, and why
frame-build-minimal 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: 奢华极简留白帧 (Build Minimal)】 【意图】高端品牌 hero / 单词陈述 / 优雅标题卡。视觉提炼自 huashu-design 的 Build Studio 流派 (MIT, © alchaincyf)。
【画布】1920×1080, 暖白底 #FAFAF8; 左上叠暖金径向 wash (rgba(212,165,116,0.07))。70%+ 留白是这套风格的灵魂, 不要填满。
【字体】西文 Inter weight 200/300 (超细); 中文 Noto Sans SC Light。字距收紧 (-4 ~ -7px)。
【主结构 (时间轴, 默认 5s)】
- 0.2s 四角 corner marks (暖金 0.5px 描边 L 形) + 暖金 wash 淡入。
- 0.5s eyebrow (uppercase, letter-spacing 9px,
#B0ACA4) fadeUp。 - 0.6s 起 hero 单词逐字符浮现 (每字 .ch span, 错峰 80ms, translateY 30→0, expo-out)。font-size ~220px, weight 200。
- 1.9s 暖金细线 (
#D4A574, 高 1px) 从宽 0 → 88px 居中生长。 - 2.2s 两行 desc (weight 300,
#A8A4A0, line-height 2) fadeUp。 - 1.8s 侧边竖排小标签 (左右各一, rotate ±90°) 淡入。
- 2.4s 起 底部 7 条细竖线 (1.5px, 部分暖金) 错峰升起, 随后进入 4s 慢呼吸循环 (opacity 1↔0.45)。
【配色纪律】仅用 暖白 #FAFAF8 / 近黑 #1A1A18 / 暖金 #D4A574 / 暖灰 #A8A4A0/#B0ACA4。禁止鲜艳色。暖金是唯一强调, 极克制 (细线 / 角标 / 个别指示器)。
【内容纪律】
- hero 是一个词 (≤16 字符), 必须用用户真实品牌词/主题词。
- desc 两行短句, 严禁 lorem ipsum。
- 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 · 62 lines · 27 tokens per session scan A ae6e4876dc37
frame-build-minimal is a skill published in the GitHub repository nexu-io/html-video (4,564 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 27 tokens to every session and 1,122 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
A single-file HTML template for showing a process or system as a whiteboard with coloured sticky notes, curved arrows, and optional mouse interactions.
popular-web-designs
54 real design systems (Stripe, Linear, Vercel) as HTML/CSS.
frontend-design
Produce intentional, responsive, accessible UI work and perform visual QA instead of generic component assembly.
designlang-tokens
Use when styling UI for cal.com — references the extracted design system tokens instead of inventing colors, spacing, or typography.
reimagine-it
Content-Derived Design — reads existing HTML and writes a stronger standalone page from headings, facts, names, dates, numbers, links, emails, and colors already in that file. CLI: npx reimagine-it --auto -i page.html -o out.html; also variations, lock, and audit. Use when the user says /reimagine-it, "reimagine it"…
css-at-property
Use when implementing animated gradients, complex CSS transitions that involve custom property values, or building a typed design token system where custom property misuse should produce visible errors.