Files
webstudio/packages/css-engine
Oleg Isonen d291e4b671 feat: Builder api runtime contracts guardrails for MCP (#5857)
This PR expands Webstudio MCP and CLI into a more complete agent
authoring interface. Agents can discover project capabilities, edit real
Webstudio content, use data/resources, verify visual output, and report
useful issues when workflows fail.

## MCP User Capabilities

- Create, update, duplicate, reorder, and delete pages.
- Create pages from templates and manage reusable page templates.
- Inspect project pages, instances, props, styles, assets, variables,
resources, and metadata.
- Insert Webstudio components and authored JSX fragments into pages.
- Edit text, props, styles, breakpoints, design tokens, and CSS
variables.
- Update page metadata, SEO fields, redirects, marketplace metadata, and
project settings.
- Create and use static data variables.
- Create and use dynamic resources fetched over HTTP.
- Use REST, GraphQL, and built-in system resources in authored pages.
- Bind data variables and resources to visible page content.
- Create resource-backed pages such as sitemap XML, structured SEO data,
and API-driven content sections.
- Preview current project state without requiring a publish step.
- Capture screenshots for visual verification.
- Verify responsive designs across desktop, tablet, and mobile
breakpoints.
- Use screenshot diff and OCR-style checks to inspect rendered output.
- Reset and refresh local MCP project state when needed.
- Discover available CLI/MCP commands from generated manuals.
- Use clearer examples for resources, data variables, JSX authoring,
previewing, and visual checks.
- Read marketplace product metadata without requiring a full project
snapshot.
- Get safer guidance when using low-level patch tools.
- Get a ready-to-copy Discord report template when MCP/CLI behavior is
confusing or broken.
2026-07-10 02:13:22 +02:00
..
2023-02-14 11:15:24 +01:00

CSS Engine

This package is designed to render effectively CSS in the format produced by Webstudio Builder. It is using CSS variables for all dynamic parts and can render at runtime as for usage on Live Canvas in the Builder as well as for extracting a fully static style sheet for production.