Install
$ npx skills add github.com/anthropics/skills --skill slack-gif-creatorInstall without a terminal (Claude.ai)
slack-gif-creator is verified on Claude.ai, so you can install it from the browser — no command line. It then runs in Claude’s server-side sandbox, which has no shell and no access to your computer’s files: you upload what it should read and download what it produces.
- 1Turn on code execution. On claude.ai, open Settings → Capabilities and enable "Code execution and file creation". Skills that produce files need it, and it is off for some accounts by default.
- 2Download the skill folder. Follow the source link on the skill page to its repository and download the skill’s folder. Read the SKILL.md before you install it — it is plain text, and it is the instructions the agent will follow.
- 3Zip it and upload. Compress the folder into a .zip, then on claude.ai go to Customize → Skills and upload it. Skills you upload are private to your account.
- 4Ask for the work. Start a normal conversation and describe the job in your own words. The skill loads itself when your request matches what its description covers — you never invoke it by name.
Anthropic documents this flow in Use skills in Claude. See every Skill that installs this way.
Best for
Internal team comms, custom Slack reactions.
About this skill
Create animated GIFs optimized for Slack reactions and posts.
Score breakdown
Score breakdown
rubric 1.0Composite 0–100 score derived from 9 verifiable signals. See the rubric →
Related skills
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