Logo Design Skill for Claude & AI Agents

A comprehensive logo-design skill that turns Claude — or any agent that supports Agent Skills, such as Gemini CLI, Codex CLI, Cursor or GitHub Copilot — into a disciplined identity designer, from the first brief to production-ready SVG files and brand guidelines.

• Principles & process — discovery and briefs, word mapping, choosing the right mark type, concepting, geometric construction, optical corrections (overshoot, bone effect, irradiation…), colour, typography, lockups, testing, presentation, delivery, redesigns and identity systems.
• A reference library of 1,400+ real-world SVG logos, each visually classified by mark type, technique, geometry, subject, typography, mood and industry — searchable from the command line and browsable in a local gallery. Used to study construction, map category conventions and avoid look-alikes (never to copy).
• Dependency-free Python tools — audit an SVG against logo principles, build concept overview sheets and test sheets (16 px pixel test, one-colour, reversed, squint, mirror, contexts, competitor shelf test), create client presentation boards with industry-specific mockups, render PNGs, and export a complete favicon / app-icon / web-manifest set.

Contents: How it works · Install · Examples · Tests · Use · What's inside · Library

How it works

flowchart LR
    A[Brief<br/>questions or stated assumptions] --> B[Research<br/>category conventions in the library]
    B --> C[Concepts<br/>8–12 one-liners → build 3 in SVG]
    C --> D[Test & refine<br/>audit · 16 px · one-colour · shelf test]
    D --> E{{Checkpoint<br/>show concepts, recommend, stop}}
    E -- "you pick a direction<br/>and ask for the kit" --> F[Kit<br/>colour · lockups · board · icons · guidelines]
    E -- "you want changes" --> C

The skill always stops at the checkpoint: it shows the concepts as one overview image with a recommendation and offers the full kit. Nothing else is produced until you choose a direction — the kit is most of the work and only makes sense for an approved idea.

Install

Claude Code — plugin marketplace (recommended)

/plugin marketplace add kaankiziltug/logo-design-skill
/plugin install logo-design@logo-design-skill

Claude Code — manual

Copy the skill folder into your personal (all projects) or project skills directory:

git clone https://github.com/kaankiziltug/logo-design-skill.git
cp -r logo-design-skill/skills/logo-design ~/.claude/skills/logo-design          # personal
# or: cp -r logo-design-skill/skills/logo-design .claude/skills/logo-design     # per project

Claude.ai / Claude Desktop

Download logo-design.zip from the Releases page (or run python3 tools/package_skill.py) and upload it under Settings → Capabilities → Skills. If your upload has a size limit, use logo-design-lite.zip (everything except the SVG files themselves).

Gemini CLI, Codex CLI and other agents

The skill uses the open Agent Skills format (a folder with a SKILL.md), so it works in any agent that supports skills — the instructions are plain Markdown and the tools are plain Python. Clone once, then copy the folder into your agent's skills directory:

git clone https://github.com/kaankiziltug/logo-design-skill.git

cp -r logo-design-skill/skills/logo-design ~/.gemini/skills/logo-design     # Gemini CLI
cp -r logo-design-skill/skills/logo-design ~/.codex/skills/logo-design      # Codex CLI

Start a new session and ask for a logo; the agent picks the skill up from its description. The skill works best with a model that can view images, because it renders its own drafts to PNG and checks them before showing you anything. The .claude-plugin/ folder is only used by Claude Code and is ignored elsewhere.

Examples

Twenty-eight fictional briefs, from quiet luxury and neon festivals to B2B SaaS, fintech and health — each run end to end with the skill. For every brand you see exactly what the skill shows at the checkpoint (greyscale concepts with true 64/32/16 px sizes and a recommendation), followed by a colour preview of the chosen direction on mockups picked for that industry. Later batches deliberately push vivid, saturated palettes while still passing the one-colour and 3 : 1 contrast checks. The newest batch takes on three crowded categories: SaaS (no chat bubbles, charts or padlocks), finance (no coins, piggy banks or bank blue) and health (no crosses, pills or heartbeat lines). The latest ten add another ten sectors. In four of them the client picked a different concept at the checkpoint than the one the skill recommended, and the skill refined that choice before colouring it: exactly what the checkpoint is for.