slack-gif-creator Curated from Anthropic's official skills repository. What it does Create animated GIFs optimized for Slack with validators for size constraints and composable animation primitives. Source - Upstream: https://github.com/anthropics/skills/tree/main/skills/slack-gif-creator - Category: How to use This catalogue entry advertises the skill in OpenDesign so the agent discovers it during planning. To run the full upstream workflow with its original assets, scripts, and references, install the upstream bundle into your active agent's skills directory: Then ask the agent to invoke th…