gan-design

gan-design is a command for Claude Code from Fmarzochi/EGC. It costs 18 tokens per session (392 once invoked), scanned A, a copy of gan-design, Apache-2.0.

A design workflow that generates and evaluates frontend or visual work repeatedly, using a written brief, a design rubric, bounded iterations, and scoring.

In plain words
What is it for?
Use it to create and refine website or frontend designs when you want several evaluated versions within a fixed iteration limit.
Why use it?
It provides structured feedback on visual quality, originality, craft, and basic functionality during design iteration.

Command for Claude Code

Written for Claude Code: $ARGUMENTS substitution.

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add commands/fmarzochi/egc/gan-design
Clone the repo
git clone --depth 1 https://github.com/Fmarzochi/EGC

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for gan-design

README.md
[![agentmods](https://agentmods.dev/badge/commands/fmarzochi/egc/gan-design.svg)](https://agentmods.dev/commands/fmarzochi/egc/gan-design)
Your own site
<a href="https://agentmods.dev/commands/fmarzochi/egc/gan-design"><img src="https://agentmods.dev/badge/commands/fmarzochi/egc/gan-design.svg" alt="Measured on agentmods" height="20"></a>
Per session 18 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 392 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 92% copy Near-identical to another mod in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00018 $0.00392
Opus 5 $0.00009 $0.00196
Sonnet 5 $0.00004 $0.00078
Haiku 4.5 $0.00002 $0.00039

Measured 2d ago against content hash cf80ef426942, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

gan-design scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

This is a copy

92% identical to gan-design — 12 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

commands/gan-design.md · 40 lines

What it actually says

Parse the following from $ARGUMENTS:

  1. brief: the user's description of the design to create
  2. --max-iterations N: (optional, default 10) maximum design-evaluate cycles
  3. --pass-threshold N: (optional, default 7.5) weighted score to pass (higher default for design)

GAN-Style Design Harness

A two-agent loop (Generator + Evaluator) focused on frontend design quality. No planner: the brief IS the spec.

This mode emphasises rapid creative iteration on visual design quality.

Setup

  1. Create gan-harness/ directory
  2. Write the brief directly as gan-harness/spec.md
  3. Write a design-focused gan-harness/eval-rubric.md with extra weight on Design Quality and Originality

Design-Specific Eval Rubric

### Design Quality (weight: 0.35)
### Originality (weight: 0.30)
### Craft (weight: 0.25)
### Functionality (weight: 0.10)

Note: Originality weight is higher (0.30 vs 0.20) to push for creative breakthroughs. Functionality weight is lower since design mode focuses on visual quality.

Loop

Same as /project:gan-build Phase 2, but:

  • Skip the planner
  • Use the design-focused rubric
  • Generator prompt emphasizes visual quality over feature completeness
  • Evaluator prompt emphasizes "would this win a design award?" over "do all features work?"

Key Difference from gan-build

The Generator is told: "Your PRIMARY goal is visual excellence. A stunning half-finished app beats a functional ugly one. Push for creative leaps: unusual layouts, custom animations, distinctive color work."

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 40 lines · 18 tokens per session scan A cf80ef426942

Subscribe to this mod's changes

gan-design is a command published in the GitHub repository Fmarzochi/EGC (48 stars, last pushed today), licensed Apache-2.0. It adds 18 tokens to every session and 392 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 92% identical to gan-design, differing in 12 lines, and is treated as a copy.