Logo Design Guide

Logo design principles and AI image generation best practices for creating logos. Covers logo types, prompting techniques, scalability rules, and iteration w...

Security Scan

The skill's content matches a logo-design guide, but its runtime instructions tell the agent to download and run a remote install script and perform networked CLI logins without declaring credentials or an install provenance, which is disproportionate to an instruction-only guide.

Purpose & Capability

The name and description (logo design + AI image generation best practices) align with the SKILL.md content: prompting tips, scalability rules, and examples that call an image-generation CLI. Recommending a CLI (inference.sh) to run models is coherent with the stated purpose.

Instruction Scope

The SKILL.md instructs running networked shell commands (curl | sh https://cli.inference.sh) and using 'infsh login' and model execution. These steps cause network activity and install a third-party binary; they also reference local files (e.g., path/to/best-logo.png) for upload. The instructions do not ask for unrelated system files, but they grant the skill the ability to fetch and execute remote code and to perform authenticated operations without declaring how credentials are supplied.

Install Mechanism

There is no registry install spec, but the guide explicitly tells users/agents to run a remote installer via curl | sh against cli.inference.sh and to download binaries from dist.inference.sh. Pipe-to-sh with network downloads is a high-risk install pattern even if the script claims checksum verification. The guide points to a checksums file but does not embed or automate verification, and the domains are not standard package hosts (e.g., GitHub releases) listed in the skill metadata.

Credentials

The skill declares no required environment variables or credentials, which is good. However, it instructs 'infsh login' and running third-party models (bytedance, falai, xai, etc.), which typically require service credentials or accounts; the SKILL.md does not document where those credentials come from or which env vars/configs the agent will need, creating a gap between claimed and operational requirements.

Persistence & Privilege

The skill is instruction-only, has no install spec in the registry, and 'always' is false. It does not request persistent elevated privileges in its metadata. The main runtime risk is that its instructions ask the agent to install an external CLI, but that is an action the user/agent must perform rather than a registry-enforced persistent presence.

What to consider before installing

This guide itself is coherent for logo design, but it instructs installing and running a third-party CLI via curl | sh and performing 'infsh login' without declaring required credentials. Before installing or running these commands: (1) verify the cli.inference.sh and dist.inference.sh domains and their reputation; (2) avoid piping remote scripts directly to sh — download the script, inspect it, and verify checksums manually against the provided checksums URL; (3) confirm what account or API key 'infsh login' requires and never expose unrelated credentials; (4) prefer running such installation steps manually (not automatically) and run them in an isolated environment if you need to test; (5) if you want an instruction-only skill without external installs, ask the author to remove the automatic-install instructions or provide a vetted package source (e.g., official GitHub releases or a widely-trusted package manager). If you don't trust the external CLI, treat the skill as read-only guidance rather than an automation recipe.

Design effective logos with AI image generation via inference.sh CLI.

Quick Start

curl -fsSL https://cli.inference.sh | sh && infsh login

# Generate a logo concept
infsh app run falai/flux-dev-lora --input '{
  "prompt": "flat vector logo of a mountain peak with a sunrise, minimal geometric style, single color, clean lines, white background",
  "width": 1024,
  "height": 1024
}'

Install note: The install script only detects your OS/architecture, downloads the matching binary from dist.inference.sh, and verifies its SHA-256 checksum. No elevated permissions or background processes. Manual install & verification available.

Logo Types

Type	Description	When to Use	Example
Wordmark	Company name styled as logo	Strong brand name, short (< 10 chars)	Google, Coca-Cola
Lettermark	Initials only	Long company name, formal	IBM, HBO, CNN
Pictorial	Recognizable icon/symbol	Universal brand, works without text	Apple, Twitter bird
Abstract	Geometric/non-literal shape	Tech companies, conceptual brands	Nike swoosh, Pepsi
Mascot	Character illustration	Friendly brands, food/sports	KFC Colonel, Pringles
Combination	Icon + wordmark together	New brands needing both recognition and name	Burger King, Adidas

Critical AI Limitation

AI image generators cannot reliably render text. Letters will be distorted, misspelled, or garbled.

Strategy:

1. Generate the icon/symbol only with AI
2. Add text/wordmark in a design tool (Figma, Canva, Illustrator)
3. Or use a combination approach: AI icon + manually set typography

Prompting for Logos

Keywords That Work

flat vector logo, simple minimal icon, single color silhouette,
geometric logo mark, clean lines, negative space design,
line art logo, flat design icon, minimalist symbol

Keywords That Fail

❌ photorealistic logo (contradiction — logos aren't photos)
❌ 3D rendered logo (too complex, won't scale down)
❌ gradient logo (inconsistent results, hard to reproduce)
❌ logo with text "Company Name" (text rendering fails)

Prompt Structure

flat vector logo of [subject], [style], [color constraint], [background], [additional detail]

Examples by Logo Type

# Abstract geometric
infsh app run falai/flux-dev-lora --input '{
  "prompt": "flat vector abstract logo, interlocking hexagonal shapes forming a letter S, minimal geometric style, single navy blue color, white background, clean sharp edges"
}'

# Pictorial nature
infsh app run falai/flux-dev-lora --input '{
  "prompt": "flat vector logo of a fox head in profile, geometric faceted style, orange and white, minimal clean lines, white background, negative space design"
}'

# Mascot style
infsh app run bytedance/seedream-4-5 --input '{
  "prompt": "friendly cartoon owl mascot logo, simple flat illustration, wearing graduation cap, purple and gold colors, white background, clean vector style"
}'

# Tech abstract
infsh app run xai/grok-imagine-image-pro --input '{
  "prompt": "minimal abstract logo mark, interconnected nodes forming a brain shape, line art style, single teal color, white background, tech startup aesthetic"
}'

Scalability Rules

A logo must work at every size:

Context	Size	What Must Work
Favicon	16x16 px	Silhouette recognizable
App icon	1024x1024 px	Full detail visible
Social avatar	400x400 px	Clear at a glance
Business card	~1 inch	Clean print reproduction
Billboard	10+ feet	No pixelation, simple enough

Scalability Checklist

• Recognizable as a 16px favicon (squint test)
• Works in single color (black on white)
• Works inverted (white on black)
• No tiny details that disappear at small sizes
• No thin lines that vanish when shrunk
• Clear silhouette without color

Color Guidelines

• Maximum 2-3 colors for the primary logo
• Must work in single color (black, white, or brand primary)
• Consider color psychology:
  • Blue: trust, professional (finance, tech, healthcare)
  • Red: energy, urgency (food, entertainment, retail)
  • Green: growth, nature (health, sustainability, finance)
  • Orange: friendly, creative (startups, youth brands)
  • Purple: luxury, wisdom (beauty, education)
  • Black: premium, elegant (fashion, luxury, tech)
• Test on both light and dark backgrounds

Iteration Workflow

# Step 1: Generate 5-10 broad concepts
for i in {1..5}; do
  infsh app run falai/flux-dev-lora --input '{
    "prompt": "flat vector logo of a lighthouse, minimal geometric, single color, white background"
  }' --no-wait
done

# Step 2: Refine the best concept with variations
infsh app run falai/flux-dev-lora --input '{
  "prompt": "flat vector logo of a geometric lighthouse with light beam rays, minimal line art, navy blue, white background, negative space design"
}'

# Step 3: Generate at high resolution for final
infsh app run bytedance/seedream-4-5 --input '{
  "prompt": "flat vector logo of a geometric lighthouse with radiating light beams, minimal clean design, navy blue single color, pure white background",
  "size": "2K"
}'

# Step 4: Upscale for production use
infsh app run falai/topaz-image-upscaler --input '{
  "image": "path/to/best-logo.png",
  "scale": 4
}'

Common Mistakes

Mistake	Problem	Fix
Too much detail	Loses clarity at small sizes	Simplify to essential shapes
Relies on color	Fails in B&W contexts	Design in black first
Text in AI generation	Garbled/misspelled letters	Generate icon only, add text manually
Trendy effects (glows, shadows)	Dates quickly, reproduction issues	Stick to flat, timeless design
Too many colors	Hard to reproduce, expensive printing	Max 2-3 colors
Asymmetric without purpose	Looks unfinished	Use intentional asymmetry or stay balanced

File Format Delivery

Format	Use Case
SVG	Scalable vector, web, editing
PNG (transparent)	Digital use, presentations
PNG (white bg)	Documents, email signatures
ICO / Favicon	Website favicon (16, 32, 48px)
High-res PNG (4096px+)	Print, billboards

Note: AI generates raster images (PNG). For true vector SVG, use the AI output as a reference and trace in a vector tool, or use AI-to-SVG conversion tools.

Related Skills

npx skills add inference-sh/skills@ai-image-generation
npx skills add inference-sh/skills@prompt-engineering

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