Generate Slack-ready animated GIFs from custom frame sequences
Use Anthropic's slack-gif-creator skill to build animated GIFs that stay inside Slack's practical size, duration, and dimension constraints. It gives an agent a bounded GIF-production workflow, not a generic image library or chat sticker listing.
npx skills add agentskillexchange/skills --skill generate-slack-ready-animated-gifs-from-custom-frame-sequences
Tool name: Anthropic’s slack-gif-creator skill from the public anthropics/skills repository. The upstream source defines a very specific job: create animated GIFs optimized for Slack, with explicit dimensions, frame-rate guidance, color limits, and a code path built around GIFBuilder, Pillow, and image encoding helpers. That specificity is exactly why this passes the skill-shaped gate.
What this skill actually does
What the agent does: decide whether the output is an emoji-sized GIF or a larger message GIF, build or transform the frame sequence, draw graphics with Pillow primitives or use uploaded images as direct source material, optimize the palette and frame count, and export a GIF that is small enough and short enough to work well in Slack. The skill is valuable because it translates vague requests like “make me a Slack GIF of this mascot waving” into a repeatable rendering and optimization workflow with concrete technical constraints.
When to use it: invoke this skill when the user wants a custom Slack reaction GIF, a lightweight animated status graphic, or a short looping visual for internal chat. It is the right choice when a normal image generator is not enough because the final output must actually behave well inside Slack and not balloon in file size or playback length.
Scope boundary: this is not a generic design tool, not a broad video editor, and not a catalog card for Pillow or imageio. Its scope is narrowly bounded to Slack-oriented GIF creation and optimization. Integration points: Python, Pillow, imageio, imageio-ffmpeg, numpy, uploaded PNG or JPG source images, and downstream Slack usage for emoji or message attachments.