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Sleek Design Mobile Apps - Setup Guide

Source: skills.sh (75.1K installs) GitHub: sleekdotdesign/agent-skills (572⭐, MIT) Category: Design / Mobile App Development First Seen: Sep 2026 (skills.sh listing under designed-by-ai/skills) Quality Tier: 🟢 Production (Gen Agent Trust Hub Pass / Socket Pass / Snyk Pass)

Sleek is an AI-powered mobile app design tool, and this is its official agent skill. An agent describes what should be built in plain language, and the skill drives Sleek's REST API (/api/v1/*) to create projects, run design chats, pull components, and render screenshots. The SKILL.md is a complete API reference with device-flow key onboarding, so the end user never handles a raw API key. The skills.sh listing source is designed-by-ai/skills; the GitHub repo the README ships from is sleekdotdesign/agent-skills (same content, 572⭐ canonical repo).

Installation

npx skills add designed-by-ai/skills --skill design-mobile-apps

The GitHub-URL form shown on the skill page is equivalent:

npx skills add https://github.com/designed-by-ai/skills --skill design-mobile-apps

Note (from the publisher README): npx skills add installs into .agents/skills/ in the working directory. If your agent does not discover skills there, point it at the installed SKILL.md explicitly. Manual install keeps the bundle intact wherever the platform expects skills.

Prerequisites

Requirement Details
Sleek account Free accounts get one-time trial credits (about one design run); sustained use needs Pro or higher ($49.99/month, or $30/month billed yearly with 20,000 monthly AI credits)
SLEEK_API_KEY Environment variable. Created at sleek.design/agents/setup or managed at sleek.design/dashboard/api-keys
Device-flow auth If no key is set, the skill runs the device flow: POST /api/v1/device/start → show the user the verification URL + user code → poll /api/v1/device/poll until approved. Keys expire after 15 minutes
Network scope Single host: all requests go exclusively to https://sleek.design; no third-party endpoints

What It Provides

Capability How It Works
Project management Create, list, get, and delete projects (projects:read / projects:write scopes)
Design chats Send plain-language messages that describe what to build; runs return rendered screens (chats:read / chats:write)
Component library List components in a project (components:read)
Screenshot rendering Render component screenshots to images (screenshots scope)
Minimal-scope keys Create API keys with only the scopes a task needs; prefer short-lived or revocable keys
Contract self-discovery OpenAPI spec at https://sleek.design/api/v1/spec.json; browsable docs at https://sleek.design/api/v1/docs

Quick Start

  1. Install the skill (above)
  2. Run it; it will trigger the device flow for the API key on first use (user approves at the printed URL, key lands in SLEEK_API_KEY)
  3. Ask for a design: create a project, send a chat message describing the app or screens wanted, and pull the returned rendered screens
  4. Iterate with follow-up chat runs; use the screenshots scope to render components for review
  5. Export assets or implement the design in code (HTML, React Native, SwiftUI) per the SKILL.md guidance

CorpusIQ Use Cases

  • UGC visual assets - generate app-screen mockups for content and landing-page visuals without a designer in the loop
  • Product concept exploration - prototype mobile UI concepts for CorpusIQ feature pitches and investor decks in minutes
  • Client-facing demos - render example dashboards or screens for outreach and onboarding material
  • Content production - the HyperFrames/UGC pipeline can feed Sleek-rendered screens into video compositions
  • Competitive teardowns - mock up competitor flows side by side to sharpen product positioning docs

Limitations / Verification

  • Paid ceiling: free tier is one-time trial credits; sustained use requires a Pro plan. State pricing plainly before any payment step (the SKILL.md mandates this).
  • Single-vendor lock: the skill only talks to sleek.design. It is not a general design tool.
  • Listing quirk: skills.sh indexes the publisher as designed-by-ai/skills while the README's canonical repo is sleekdotdesign/agent-skills - both GitHub repos resolve (HTTP 200) and carry identical content. Install via the skills.sh source name.

Security

All three skills.sh security audits pass (verified Sep 7, 2026):

Audit Verdict
Gen Agent Trust Hub Pass
Socket Pass
Snyk Pass

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