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portolan-thumbnails

79 / 100 · Review before installing

Check before installing. Some of what it can do is expected: a media skill usually calls an AI service over the internet.

By portolan-sdi/portolan-skills (GitHub) · media · 13 stars · scanned at commit 1714d9a

Generate framed, checked thumbnails from Portolan collections using chiitiler (MapLibre GL Native). Renders the collection's default style server-side over the PMTiles the collection links to, with an optional basemap, frames every bbox to the browser card's 3:2 shape, accepts an image only after an automated blank probe and a visual review, then refreshes file:size and file:checksum with portolan check and its fix flag. Requires Node.js 24.12 or newer.

Works with any agent that supports SKILL.md skills.

What this skill can do

Safer alternatives

Low-risk skills in the same category (media) that look related. Check that one does what you need.

• 100 Low riskextracting-thumbnailsyikart/AiToEarn · 27,587 stars
• 100 Low riskscenario-thumbnailsscenario-labs/skills · 3,675 stars

Install

Paste this into your terminal. It downloads exactly the version we scanned, not whatever is newest.

if [ -e ~/.agents/skills/'portolan-thumbnails' ] || [ -L ~/.agents/skills/'portolan-thumbnails' ]; then echo 'A skill folder named portolan-thumbnails already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/portolan-sdi/portolan-skills' "$d" && git -C "$d" checkout --quiet '1714d9ab672e6a1bbc56ca12458e41b14484d426' -- 'skills/portolan-thumbnails' && mkdir -p ~/.agents/skills && cp -R "$d"/'skills/portolan-thumbnails' ~/.agents/skills/'portolan-thumbnails' && rm -rf "$d"; fi

Codex reads ~/.agents/skills directly. For Claude Code, Cursor, Copilot, Gemini CLI, Antigravity or OpenCode, also link it. For Claude Code: ln -s ~/.agents/skills/'portolan-thumbnails' ~/.claude/skills/'portolan-thumbnails' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.

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