# Preview Deck > Preview Deck is an editor for composing App Store and Google Play screenshots. Design once on a base device, cascade overrides across every device the store requires, export the bundle. Operable by AI agents through a public HTTP API. ## Agent skill - [preview-deck-operate](https://app.previewdeck.com/skill.md) — install command and full operating instructions for an AI agent driving Preview Deck. ## Public agent docs - [AI agents · Preview Deck](https://app.previewdeck.com/agents) — Use Preview Deck from your AI coding agent. API key auth, async jobs, full-document mutations, and a human review handoff. - [Agent API · Preview Deck](https://app.previewdeck.com/agents/api) — Endpoints, auth, scopes, error semantics, and the exact call flow for AI agents driving Preview Deck. - [Agent design guide · Preview Deck](https://app.previewdeck.com/agents/design-guide) — How to structure projects, families, screenshots, frames, text overlays, image overlays, and gradients well. - [Agent review loop · Preview Deck](https://app.previewdeck.com/agents/review-loop) — How the human reviews agent runs, how the handoff URL behaves, and what to do after feedback. ## Live JSON schemas - [EditorDocumentV1](https://app.previewdeck.com/api/agent/v1/schema/document) - [AgentMutationJobRequestV1](https://app.previewdeck.com/api/agent/v1/schema/job) ## Discovery - https://app.previewdeck.com/.well-known/agent-skills/index.json - https://app.previewdeck.com/.well-known/skills/index.json (legacy alias) - https://app.previewdeck.com/.well-known/llms.txt (alias for /llms.txt) - https://app.previewdeck.com/.well-known/llms-full.txt