illo skill

illo skill is an open-source Agent Skills-format skill made by Trevin Chow. It turns a short idea, a social post, or a full article into original editorial illustrations in which a recurring mascot performs the idea. It runs inside the user's own coding agent rather than as a hosted service.

What It Is

illo skill is an agent skill, not a web app or hosted image API. You invoke it with the /illo command inside an agent such as Claude Code, Codex, Grok CLI, Grok Bot, Hermes, or OpenClaw. It produces illustrations from a bare idea, a URL (for example a hero image plus inline art for a post), or a "surprise me" prompt. The site lists Blot as the built-in character, with community character packs adding more.

Output Formats

Editorial scenes are the default: one caught moment that conveys the idea. Other formats are available on request:

• Mini-comics of 2-4 panels in a single image, for story beats such as fail-to-fix.
• Explainer diagrams with labeled stages, flows, timelines, or stacks.
• Transparent PNG character cutouts of the mascot alone, for slides, docs, or overlays.
• Banner sizes such as an X Article banner, plus custom or brand palettes.

Characters and Looks

Each character pack pairs one mascot with one bundled print look. The site lists 58 packs and 17 looks, including riso, blueprint, bricks, bloom, and snes. Packs install by name, for example /illo install mole character pack. Users can also build their own character, which stays a local folder unless they choose to share it in the community repository.

Setup and Image Backends

The skill needs a coding agent with a capable reasoning model, because it shows each rendered image back to the model to check it and re-roll if needed. Image generation goes through one of several backends: a signed-in Codex CLI or Grok CLI, Grok Bot's built-in image tool, Muse's built-in tool, or an OpenRouter key stored locally. Grok CLI and Grok Bot paths cannot make transparent cutouts, so those route to Codex or OpenRouter. Installation uses each agent's native plugin or skill manager, or npx skills add tmchow/illo-skill --skill illo. The engine is a single stdlib Python script, and the skill and community packs are MIT-licensed.