design

Guidance for designing user interfaces that are easy to understand and pleasant to use. It covers screens, buttons, loading states, errors, gestures, and animation behavior.

In plain words
What is it for?
Use it when building or reviewing screens, placing controls, designing loading and error states, adding transitions, and adapting interactions for phones and different platforms.
Why use it?
It helps avoid interfaces that leave users unsure what happened or make common actions difficult to find and use.

Skill for Claude CodeCodex

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 skills/launch52-ai/flutter-template/design
Any agent
npx skills add launch52-ai/flutter-template --skill design
Clone the repo
git clone --depth 1 https://github.com/launch52-ai/flutter-template

Made for: Claude Code, Codex.

Per session 55 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,206 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found 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 $0.00055 $0.01206
Opus 5 $0.00028 $0.00603
Sonnet 5 $0.00011 $0.00241
Haiku 4.5 $0.00006 $0.00121

Measured yesterday against content hash 0fb9d1cbe073, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

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 yesterday.

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.

.claude/skills/design/SKILL.md · 117 lines

How it starts

The opening of the file, as written. The whole thing — 117 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Design - UI/UX Implementation

Create interfaces that feel intuitive, responsive, and delightful. Focus on the small details that distinguish polished apps from mediocre ones.

When to Use This Skill

  • Implementing new screens or components
  • Reviewing UI code for UX issues
  • Deciding between loading state patterns
  • Placing buttons, CTAs, and interactive elements
  • Handling errors and edge cases gracefully
  • Adding animations and transitions
  • Choosing animation timing and curves

The Golden Rules

  1. Thumb-first design - Primary actions in the bottom 2/3 of the screen
  2. Immediate feedback - Every tap/action should have visible response
  3. Smart defaults - Auto-focus, pre-fill, remember preferences
  4. Graceful failures - Errors should guide, not blame
  5. Platform respect - iOS swipe-back, Android gestures, Material patterns
  6. Purposeful motion - Animate to communicate, not to impress

Core Principles

Every Action Deserves Feedback

Users should never wonder "did that work?" - provide visual press states, haptics, loading indicators, and success/error messages. See interaction-guide.md for details.

Auto-Focus Intelligence

Focus the right field at the right time - login screens should auto-focus email, search screens should auto-focus the search field. See interaction-guide.md for the complete decision table.

Error Recovery, Not Error Display

Errors should help users succeed. Instead of "Error: Invalid input", show "Email needs an @ symbol". See visual-guide.md for error state patterns.

Touch Targets

Minimum 48×48dp for all interactive elements. See interaction-guide.md for sizing guidelines.

Purposeful Animation

Animation should communicate change, not decorate. Use 300ms for transitions, match curves to motion direction, and always respect reduced motion preferences. See animation-guide.md for timing, curves, and patterns.

Read the full file on GitHub · 117 lines

Files

What ships with it

5 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. yesterday First seen · 117 lines · 55 tokens per session scan A 0fb9d1cbe073

Subscribe to this mod's changes

design is a skill published in the GitHub repository launch52-ai/flutter-template (2 stars, last pushed 6mo ago), licensed MIT. It adds 55 tokens to every session and 1,206 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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