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-postergit 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-poster)<a href="https://agentmods.dev/skills/nexu-io/html-video/frame-bold-poster"><img src="https://agentmods.dev/badge/skills/nexu-io/html-video/frame-bold-poster/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-poster"><img src="https://agentmods.dev/badge/skills/nexu-io/html-video/frame-bold-poster.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 | $0.00045 | $0.01190 |
| Opus 5 | $0.00023 | $0.00595 |
| Sonnet 5 | $0.00009 | $0.00238 |
| Haiku 4.5 | $0.00005 | $0.00119 |
Grade A, and why
frame-bold-poster 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: 大胆海报帧 (Bold Poster)】 【意图】品牌宣言 / 愿景陈述 / 社论或文化类开场 — 让几个词像杂志封面一样落地。视觉提炼自 frontend-slides 的 Bold Poster 模板 (MIT, © Zara Zhang),其上游灵感为 1970s 欧洲社论海报 / 意大利体育杂志 / 中世纪品牌年报。
【画布】1920×1080, 暖白纸底 #F5F2EF。
【字体】display + 数字 Shrikhand (海报级斜体大字); body Libre Baskerville (衬线, 斜体副题); mono 标签 / chrome Space Grotesk。
【配色纪律】纸白 #F5F2EF / 墨黑 #1C1410 / 唯一强调色番红 #D8000F。红色只用在: 一条 kicker rule、巨型 figure、标题中间行、footer 右侧 metadata。其余皆墨黑。全片只此一个强调色。
【主结构 (时间轴, 默认 5s)】
- 0.35s 纸底淡入 (印刷感的"落纸"而非"打光")。
- 0.5s 起 顶部 kicker: 左 mono 标签淡入 → 番红 rule 从左 scaleX 划过 → 右 mono 日期淡入。
- 0.7s 右上巨型番红 figure (
Shrikhand320px) 带旋转 (-14° → -6°) 从上落入。 - 1.15s 起 三行标题逐行升起, 每行各自 tilt: 行1 墨黑 -2°、行2 番红 -4°、行3 墨黑 +2°。
- 1.95s 衬线斜体副题 (
Libre Baskervilleitalic) fadeUp。 - 2.15s footer 墨黑 rule 划入 + mono metadata 淡入。
【内容纪律】
- headline 最多 3 行, 第 2 行自动番红; 必须真实标题, 严禁 lorem ipsum。
- 版式为"少量大字陈述", 不适合塞段落 — 信息密度高的内容请换模板。
- CJK 文本: letter-spacing 归 0、放松行高、不要对 CJK 做 uppercase。
- 动效用
@keyframes,prefers-reduced-motion下全部停在终态。 - 单文件 HTML, 字体走 Google Fonts。
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 · 45 tokens per session scan A 6c271a36f18d
frame-bold-poster 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 45 tokens to every session and 1,190 once invoked, about $0.0002 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-data-chart-nyt
NYT-newsroom typography, staggered reveal animation, and editorial-grade charts (line, bar, or range band).
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-data-chart-nyt
A design template for turning CSV data, JSON, or a written finding into a New York Times-style chart frame for video or social media.
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.