agentmods.dev

happy-video-gen

happy-video-gen is a skill for Claude Code, Codex from iamzhihuix/happy-claude-skills. It costs 280 tokens per session (1,642 once invoked), scanned A, original, MIT.

A command-line tool for generating short videos from text descriptions or from still images, using several video-generation providers.

In plain words
What is it for?
Use it to create text-to-video clips, animate a still image, control a first or last frame when supported, and save the generated video with a chosen aspect ratio and duration.
Why use it?
It gives one workflow for submitting video jobs, waiting for them to finish, and downloading the resulting MP4 or WebM file. This avoids separate commands for each supported provider.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

not rated 306repo 4mo ago A scan 280 tokens original MIT

Good fit Use it to create text-to-video clips, animate a still image, control a first or last frame when supported, and save the generated video with a chosen aspect ratio and duration.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/iamzhihuix/happy-claude-skills/happy-video-gen
View source ↗ iamzhihuix/happy-claude-skills
Install

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.

Any agent
npx skills add iamzhihuix/happy-claude-skills --skill happy-video-gen
Clone the repo
git clone --depth 1 https://github.com/iamzhihuix/happy-claude-skills

Made for: Claude Code, Codex.

Its marketplace also offers this one on its own, as the plugin happy-video-gen — /plugin install happy-video-gen after adding the marketplace above.

Wrote 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.

agentmods badge for happy-video-gen

README.md
[![agentmods](https://agentmods.dev/badge/skills/iamzhihuix/happy-claude-skills/happy-video-gen/github.svg)](https://agentmods.dev/skills/iamzhihuix/happy-claude-skills/happy-video-gen)
Your own site
<a href="https://agentmods.dev/skills/iamzhihuix/happy-claude-skills/happy-video-gen"><img src="https://agentmods.dev/badge/skills/iamzhihuix/happy-claude-skills/happy-video-gen/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.

agentmods 80×15 button for happy-video-gen

Your own site · 80×15
<a href="https://agentmods.dev/skills/iamzhihuix/happy-claude-skills/happy-video-gen"><img src="https://agentmods.dev/badge/skills/iamzhihuix/happy-claude-skills/happy-video-gen.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 280 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,642 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00280 $0.01642
Opus 5 $0.00140 $0.00821
Sonnet 5 $0.00056 $0.00328
Haiku 4.5 $0.00028 $0.00164

Measured 12d ago against content hash 908100d8c8dc, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

happy-video-gen 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.

The scan reads SKILL.md. This mod also ships 15 executable files (scripts/main.ts, scripts/providers/ark.ts, scripts/providers/bailian.ts, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

skills/happy-video-gen/SKILL.md · 103 lines

How it starts

The opening of the file, as written. The whole thing — 103 lines — stays where its author put it; the contents beside it link to each section on GitHub.

happy-video-gen

Generates short videos (text-to-video or image-to-video) across 10 providers through one CLI: bun scripts/main.ts .... All providers are async — the CLI submits a job, polls until the provider finishes, then downloads the MP4 / WebM.

Quick usage

# Text-to-video
bun scripts/main.ts --prompt "camera slowly pushes into a calico cat on grass" --ar 16:9 --duration 5 --video ./out.mp4

# Image-to-video (first frame)
bun scripts/main.ts --prompt "subtle zoom, leaves swaying" --image ./keyframe.png --duration 5 --video ./out.mp4

# Image-to-video with last-frame control (provider-dependent)
bun scripts/main.ts --prompt "seamless morph" --image ./a.png --last-frame ./b.png --video ./out.mp4

When to invoke this skill

  • User asks to generate / create / make / synthesize a video from text.
  • User asks to animate a still image, or provides a first-frame path.
  • User names any video model family (Sora, Veo, Runway, Kling, Wan, Seedance, Hailuo, Pika, Dream Machine, Vidu).

Route to happy-dreamina if the user explicitly mentions 即梦 / Jimeng / dreamina CLI. Route to happy-image-gen if the user actually wants a still image.

Step 0: Preflight (BLOCKING)

  1. Locate EXTEND.md (same resolution order as happy-image-gen):

    • ./.happy-skills/happy-video-gen/EXTEND.md
    • $XDG_CONFIG_HOME/happy-skills/happy-video-gen/EXTEND.md
    • ~/.happy-skills/happy-video-gen/EXTEND.md

    If none, run bun scripts/main.ts --setup and walk the user through references/config/first-time-setup.md.

  2. Verify one provider has credentials. Check env vars in the order the CLI auto-detects (see providers.md). Do not proceed without one usable provider.

  3. Verify Bun. Fall back to npx -y bun if missing.

  4. Warn about cost. Video generation is 10–100× more expensive per call than images. If the user asks for HD 1080P / 10-second clips, confirm before firing — show them the expected provider cost bracket from references/providers.md.

Read the full file on GitHub · 103 lines

Files

What ships with it

23 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.

Changes

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.

  1. 12d ago First seen · 103 lines · 280 tokens per session scan A 908100d8c8dc

Subscribe to this mod's changes

happy-video-gen is a skill published in the GitHub repository iamzhihuix/happy-claude-skills (306 stars, last pushed 4mo ago), licensed MIT. It adds 280 tokens to every session and 1,642 once invoked, about $0.0014 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.

Creative and media
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