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Css Alpha Masking

Checked
mengto·vlatest·frontend·MIT

Generate CSS alpha masks to selectively reveal or hide content based on image data or custom gradients.

Repository

Install on your platform

Showing Claude Code. One command installs this skill into any of the agents below.

  1. 1

    Run this in your project

    terminal
    $ npx skills add mengto/skills --skill css-alpha-masking -a claude-code

  2. Uses the open-source skills CLI and needs Node.js. Add -g to install it for your user instead of this project.

What we know about this skill

Publisher

mengto

Taken from the source listing. We haven't verified who controls this account.

Install target

Live repository

Not pinned. Installing fetches whatever the repository holds at the time you run the command.

No human has reviewed this code. The checks below are a static scan of the files at one commit — nobody has run this skill or judged whether it works. A skill runs with whatever access you give your agent, so read the source before you install it.

Automated safety checks

scanned

This skill passed all 6 checks. We read its files at one commit and looked for the things that make a skill dangerous to run — not for whether it works.

  • Declares what it does: passed

    SKILL.md parses and declares a name and a description.

    SKILL.md exists, its frontmatter parses, and it declares a name and a description.

  • No undeclared network calls: passed

    Makes no network calls.

    Every host the skill dials — from its scripts, its config endpoints or the commands it tells the agent to run — is either well-known package and API infrastructure or declared in its own frontmatter. Links in documentation are not counted.

  • No obfuscated payloads: passed

    No encoded or obfuscated payloads.

    No base64, hex or compressed blob is decoded and then executed, and no encoded shell commands.

  • No credential access: passed

    Reads no keys, tokens, keychains or credential files.

    Neither the code nor the SKILL.md instructions read SSH keys, cloud credentials, keychains, token stores, browser cookie databases or dotfiles that hold secrets.

  • No pipe-to-shell installers: passed

    No pipe-to-shell or download-and-run installers.

    No `curl … | sh` pattern, in the code or in the instructions, that runs code fetched at run time.

  • Pinned to a commit: passed

    Scanned mengto/skills at 83a47fee32.

    The exact upstream commit SHA that was scanned is recorded, so the result refers to specific bytes.

Commit
83a47fee32
Manifest
agent-skills/web-design/css-alpha-masking/SKILL.md
Scanned
1 file, 41 lines
This is a static scan, not a review. It reads the skill's files; it does not run them, and it cannot tell you whether the skill is any good or whether the code does what its description says. A skill runs with whatever access you give your agent.
What each check looks for →

About this skill

What it does

This skill enables AI agents to generate CSS code that utilizes alpha masking. Alpha masking allows elements to be partially visible, revealing underlying layers or creating interesting visual effects by controlling the opacity of an element based on another image or shape. The generated CSS can be used to create complex and visually appealing frontend designs.

When to use it

  • Creating a logo reveal effect where text appears over an image.
  • Generating a custom button with a unique, partially transparent background.
  • Implementing a visual filter for images using CSS masking.
  • Designing interactive elements that change opacity based on user interaction.

Key capabilities

  • Generates CSS code for alpha masking.
  • Supports various masking techniques.
  • Allows control over the transparency of masked elements.

Example prompts

  • "Create a CSS mask to reveal a logo image behind a semi-transparent button."
  • "Generate CSS that makes an element partially transparent based on the shape of a star."
  • “Show me how to create an alpha mask in CSS for a circular cutout effect.”

Tips & gotchas

The effectiveness of this skill relies on understanding basic CSS concepts and having appropriate image assets available for masking. Ensure your AI agent has access to or can generate suitable images if needed.