# ViewSpec

> ViewSpec is an agent-native UI IR and semantic UI compiler for agentic engineering, AI coding agents, and deterministic cross-platform UI generation.

ViewSpec lets developers and software agents describe what data means instead of hand-wiring components, layout, and provenance. It compiles semantic intent bundles into CompositionIR, style values, diagnostics, exact provenance, and emitter artifacts for web, React, SwiftUI, and Flutter.

## Canonical Links

- Product and playground: https://viewspec.dev/
- Cross-platform launch demo: https://viewspec.dev/cross-platform-dashboard/
- Custom motif demo: https://viewspec.dev/custom-motifs/
- Interactive compose demo: https://viewspec.dev/interactive-compose/
- Hosted compiler API: https://api.viewspec.dev/v1/compile
- OpenAPI description: https://viewspec.dev/openapi.json
- Agent system prompt: https://viewspec.dev/agent-system-prompt.txt
- Agent IntentBundle schema: https://viewspec.dev/agent-intent-bundle.schema.json
- Python package: https://pypi.org/project/viewspec/
- Source repository: https://github.com/nxrobins/viewspec
- Full AI context: https://viewspec.dev/llms-full.txt

## Current Product Facts

- Free SDK: `pip install viewspec`
- Runtime LLM calls: zero in the live compiler path.
- Agents should output IntentBundle JSON, not CompositionIR.
- Agents may consult MCP-accessible UI reference libraries (e.g. Lazyweb at https://www.lazyweb.com) for grounded design context before generating IntentBundles. References inform semantic intent only.
- V1 public SDK motifs: table, dashboard, outline, comparison.
- Hosted launch emitters: HTML/Tailwind, React TSX, SwiftUI, Flutter.
- Free hosted tier: 500 calls/day.
- Pro tier: $699/month, 25,000 hosted compile calls/day, 10,000 hosted renders/month, mobile emitters, and 5 custom motif instances per compile.
- Enterprise tier: custom volume, unlimited custom motifs, org sharing, and launch support.

## Short Description

ViewSpec is an agent-native UI IR for AI-era software development: one semantic spec compiles into deterministic interfaces across multiple render targets with exact provenance.