New: 98,000+ skills indexed from GitHub repos with 100+ stars · every skill safety-checkedBrowse top skillsTop skills
Esc to closeBrowse all skills
Submit a skillBrowse skills
Submit a skillBrowse skills

Agent skill

Assets

by GTKottman in GTKottman/mortiflix-oss

Finding and downloading stock assets (footage, images, illustrations, 3D models, sound effects, fonts) from the asset sites the owner uses, in the owner's own Chrome with browser-harness.

AGPL-3.0Auto-check passedMedia & Creative

Install Assets

skills CLI
$ npx skills add GTKottman/mortiflix-oss --skill assets -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install GTKottman/mortiflix-oss assets --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/GTKottman/mortiflix-oss.git skills-src && mkdir -p .claude/skills && cp -r skills-src/harness/skills/assets .claude/skills/assets && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
assets
GitHub stars
396
Token cost
~601 tokens
SKILL.md length
337 words
Files
1
Skills in repo
8
Repo updated
First seen
Licence
AGPL-3.0

At a glance

Finding and downloading stock assets (footage, images, illustrations, 3D models, sound effects, fonts) from the asset sites the owner uses, in the owner's own Chrome with browser-harness.

  • Works in 6 steps: Decide what you need first, from the… → Downloads land in this project. Before… → Search and pick on the site, like a… → …
  • A video would be better with a real asset than one youd make
  • SKILL.md covers How and When there's no listed site,…
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Assets is an agent skill from GTKottman/mortiflix-oss. Finding and downloading stock assets (footage, images, illustrations, 3D models, sound effects, fonts) from the asset sites the owner uses, in the owner's own Chrome with browser-harness. Use whenever a video would be better with a real asset than one you'd make, and the owner has listed a site for it.

Its SKILL.md is about 600 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Media & Creative, covering Music and audio generation and 3D graphics and WebGL. The repository describes itself as: A motion design studio on your own machine: Claude makes the video step by step, you approve every stage. Bring your own Claude Code or API key. The licence is AGPL-3.0.

When your agent uses it

  • A video would be better with a real asset than one youd make
  • The owner has listed a site for it

Example prompts

  • “/assets”

Workflow steps

6 steps, taken from the first numbered list in SKILL.md.

  1. Decide what you need first, from the approved script and style frames: what it shows, the style, the shape
  2. Downloads land in this project. Before the first download in a session, point Chrome's downloads at
  3. Search and pick on the site, like a designer would: look at the previews (screenshots), prefer assets that
  4. Only what the owner's account already covers. Never sign up, start a trial, accept new terms, enter payment
  5. Record every asset in assets/SOURCES.md: the site, the item's page URL, its title and author, the licence
  6. Unpack and adapt inside the project (assets/found/…): unzip, recolour to the palette, crop, key. Keep the

What it can do on your machine

Read from SKILL.md and the folder at commit aea9533. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Assets loads about 601 tokens when it runs. Until then it costs about 78 tokens; SKILL.md has 337 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~78
When it runs · the whole SKILL.md, loaded when a task matches
~601

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from GTKottman/mortiflix-oss at commit aea9533, republished under its AGPL-3.0 licence (© GTKottman). 337 words, ~601 tokens.

Download SKILL.mdSave it as .claude/skills/assets/SKILL.md (or your agent's skills folder).
name
assets
description
Finding and downloading stock assets (footage, images, illustrations, 3D models, sound effects, fonts) from the asset sites the owner uses, in the owner's own Chrome with browser-harness. Use whenever a video would be better with a real asset than one you'd make, and the owner has listed a site for it.

Assets from the owner's sites

The owner listed the sites they use for assets (in this project's CLAUDE.md, "This studio"). Their Chrome is signed in to them; you work in it through browser-harness (read its skill first). Only those sites: never search the open web for assets to download, and never use a site the owner didn't list.

How

  1. Decide what you need first, from the approved script and style frames: what it shows, the style, the shape (16:9 footage, a transparent PNG, an isolated object), and how it will be recoloured or composited. One clear search beats ten vague ones.
  2. Downloads land in this project. Before the first download in a session, point Chrome's downloads at input/downloads/ in this folder (CDP Browser.setDownloadBehavior with behavior: "allow" and the absolute path). Never leave a file in the owner's own Downloads folder.
  3. Search and pick on the site, like a designer would: look at the previews (screenshots), prefer assets that match the look, check the resolution and format before downloading.
  4. Only what the owner's account already covers. Never sign up, start a trial, accept new terms, enter payment details, or buy anything. If a download needs any of that, or a login has expired, stop and mfx needs-you with the item's link and what it's for.
  5. Record every asset in assets/SOURCES.md: the site, the item's page URL, its title and author, the licence or terms as the site states them, the file you used and where it appears in the video. Licences are the owner's agreements with the site; you report what the site says, you don't judge them.
  6. Unpack and adapt inside the project (assets/found/…): unzip, recolour to the palette, crop, key. Keep the original file untouched next to your version.

When there's no listed site, or it has nothing that fits

Make it yourself (shapes, type, 3D, generated textures), or say in the submission note what a stock asset would add and let the owner decide. Don't substitute an unlisted site.

© GTKottman, AGPL-3.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in harness/skills/assets of GTKottman/mortiflix-oss.

Open the folder on GitHubat commit aea9533

Compare with similar skills

Assets next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Assets compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Assets this skillGTKottman/mortiflix-oss396—~601Automated safety check: PassAGPL-3.0
RunninghubHM-RunningHub/OpenClaw_RH_Skills141—~1.6kAutomated safety check: PassApache-2.0
Qiaomu Cutjoeseesun/qiaomu-cut-skill369—~6.8kAutomated safety check: NotesMIT
Threejs Audio Generatorvalkor-ai/loom1.2k1 repos~1.3kAutomated safety check: PassApache-2.0
HyperFrames Media Useheygen-com/hyperframes59k—~2.4kAutomated safety check: PassApache-2.0
ElevenLabs Voiceover Generatordigitalsamba/claude-code-video-toolkit2.2k1 repos~2.7kAutomated safety check: NotesMIT

Similar skills

  • Runninghub

    HM-RunningHub/OpenClaw_RH_Skills

    Generate images, videos, audio, and 3D models via RunningHub API (420 endpoints) and run any RunningHub AI Application (custom ComfyUI workflow) by webappId.

    141 GitHub stars~1.6k tokensUpdated 1 mo ago
    Media & CreativeAuto-check passed

  • Qiaomu Cut

    joeseesun/qiaomu-cut-skill

    把一句话需求转成可复现、可验收视频工程的乔木智能剪辑导演。Use when the user asks to create, plan, edit, remix, explain, narrate, subtitle, animate, composite, or render a video—including one-line requests such as “制作一个科普视频：介绍…

    369 GitHub stars~6.8k tokensUpdated 10 days ago
    Media & CreativeAuto-check: notes

  • Threejs Audio Generator

    valkor-ai/loom

    Generate, convert, clean, and integrate audio for Three.js browser games with ElevenLabs: sound effects, looping ambience, UI sounds, impact/weapon/vehicle audio, creature and boss stingers…

    1.2k GitHub starsUsed in 1 repo~1.3k tokens
    Game DevelopmentAuto-check passed

  • HyperFrames Media Use

    heygen-com/hyperframes

    Finds, generates and edits media for HyperFrames video projects: music, sound effects, images, icons, logos, voiceovers, captions and color grades.

    59k GitHub stars~2.4k tokensUpdated today
    Media & CreativeAuto-check passed

  • ElevenLabs Voiceover Generator

    digitalsamba/claude-code-video-toolkit

    Generates narration, sound effects and cloned voices through the ElevenLabs API, with model and setting choices tuned to the content's style.

    2.2k GitHub starsUsed in 1 repo~2.7k tokens
    Media & CreativeAuto-check: notes

  • Music to Video

    heygen-com/hyperframes

    Turns a music track into a beat-synced HyperFrames video such as a lyric video, slideshow or kinetic promo, with any supplied images or clips cut onto the beat grid.

    59k GitHub starsUsed in 4 repos~4.7k tokens
    Media & CreativeAuto-check: notes

More from GTKottman/mortiflix-oss

All 8 skills in this repo

  • Blender 3D

    GTKottman/mortiflix-oss

    3D work in the studio's own Blender with its toolkits: MoBlend (MoGraph cloners, effectors, fields, MoText, fracture), Nova FX (particles, fire, sparks, fireworks), Camera (framing, shot presets…

    396 GitHub stars~902 tokensUpdated yesterday
    Auto-check passed

  • Music

    GTKottman/mortiflix-oss

    Scoring a video with original music written in Strudel, after the animatic is approved - a dramatic reading, a spotting map from the locked timing, a blueprint (motif, chart, roles, story sections…

    396 GitHub stars~2.6k tokensUpdated yesterday
    Auto-check passed

  • Remotion Motion

    GTKottman/mortiflix-oss

    Build, preview and render the video in Remotion (React): project setup from the template, stills for style frames, animatic and final renders through the studio's render queue.

    396 GitHub stars~806 tokensUpdated yesterday
    Auto-check passed

  • Transition Board

    GTKottman/mortiflix-oss

    Designing every cut of a video before the animatic - for each change from one style frame to the next, the object or idea that carries it, a transition chosen from the owner's remotion-transitions…

    396 GitHub stars~2.2k tokensUpdated yesterday
    Auto-check passed

  • Voiceover

    GTKottman/mortiflix-oss

    Narration, sound effects and music beds in the voice the studio set up (ElevenLabs, Qwen3-TTS on this machine's GPU, or the owner's own voice from the recording booth): lines from the approved…

    396 GitHub stars~1.8k tokensUpdated yesterday
    Auto-check passed

  • Final Pass

    GTKottman/mortiflix-oss

    Check a rendered video before anyone else sees it: format, black or frozen frames, loudness, true peak, and a frame sheet to look at.

    396 GitHub stars~613 tokensUpdated yesterday
    Auto-check passed

Categories

Questions about Assets

What does Assets do?

Finding and downloading stock assets (footage, images, illustrations, 3D models, sound effects, fonts) from the asset sites the owner uses, in the owner's own Chrome with browser-harness. Assets is an agent skill from GTKottman/mortiflix-oss. Finding and downloading stock assets (footage, images, illustrations, 3D models, sound effects, fonts) from the asset sites the owner uses, in the owner's own Chrome with browser-harness.

When should I use Assets?

Assets fits situations like: A video would be better with a real asset than one youd make; the owner has listed a site for it.

How do I install Assets in Claude Code?

Run `npx skills add GTKottman/mortiflix-oss --skill assets -a claude-code`. Or copy the skill folder (harness/skills/assets in GTKottman/mortiflix-oss) into .claude/skills/assets in your project. Claude Code loads it when a task matches its description.

How do I install Assets in Codex?

Run `npx skills add GTKottman/mortiflix-oss --skill assets -a codex`. Or copy the skill folder (harness/skills/assets in GTKottman/mortiflix-oss) into .agents/skills/assets in your project. Codex loads it when a task matches its description.

Can I use Assets in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add GTKottman/mortiflix-oss --skill assets -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/assets, .gemini/skills/assets, .github/skills/assets and .opencode/skills/assets in your project.

What does Assets need to run?

SKILL.md names no scripts, command-line tools or credentials: Assets is instructions for the agent only.

Does Assets access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Assets safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Assets use?

Assets is published under the AGPL-3.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Assets use?

About 601 tokens (SKILL.md is roughly 2.4k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Assets?

Skills that share tags, products or a category with Assets: Runninghub (HM-RunningHub/OpenClaw_RH_Skills, 141 stars), Qiaomu Cut (joeseesun/qiaomu-cut-skill, 369 stars), Threejs Audio Generator (valkor-ai/loom, 1.2k stars) and HyperFrames Media Use (heygen-com/hyperframes, 59k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Assets?

GTKottman (a GitHub user) maintains it in GTKottman/mortiflix-oss, which has 396 GitHub stars. The repository holds 8 skills in this directory. The repository was last updated on October 7, 2026.

Source: GTKottman/mortiflix-oss on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.