Capitol

Converts natural language descriptions into visual design layouts and compositions using a generative AI model trained on design principles and aesthetic patterns. The system interprets semantic intent from text input and maps it to design elements (typography, color, spacing, imagery) through a learned representation of design best practices, enabling non-designers to produce professional-looking compositions without manual layout work.

Enables multiple users to edit the same design document simultaneously with live cursor tracking, selection highlighting, and conflict-free concurrent edits using operational transformation or CRDT-based synchronization. The system maintains a shared document state across all connected clients, broadcasts user presence (cursor position, active selections), and resolves simultaneous edits through a deterministic merge strategy, eliminating the need for manual conflict resolution.

Enables stakeholders to review designs and provide feedback through an integrated commenting and annotation system. Reviewers can add comments to specific design elements, mark up areas with shapes or freehand drawing, and suggest changes. Comments are threaded and can be resolved or marked as actionable. The system tracks feedback history and allows designers to see who commented, when, and what changes were made in response. Feedback can be exported as a report or integrated into design version history.

Maintains a complete version history of design changes, allowing users to view previous versions, compare changes between versions, and rollback to earlier states. The system tracks who made changes, when, and what was modified (element-level change tracking). Version snapshots can be labeled with meaningful names (e.g., 'v1.0 - Client Feedback Round 1') and compared visually to highlight differences. Rollback is non-destructive — reverting to a previous version creates a new version rather than deleting history.

Analyzes the current design state and suggests improvements to layout, spacing, typography, and color harmony using rule-based heuristics and machine learning models trained on design best practices. The system evaluates elements against design principles (alignment, contrast, whitespace, visual hierarchy) and recommends specific adjustments (e.g., 'increase padding by 16px for better breathing room', 'use a complementary color for this accent'), with one-click application of suggestions.

Provides a searchable repository of design assets (icons, illustrations, photos, components, templates) organized by semantic categories and metadata tags, with full-text search and visual similarity matching. Users can browse by category, search by keyword or natural language description, and filter by style, color, or usage rights. Assets are indexed with embeddings for semantic search, enabling queries like 'modern tech icons' or 'warm color palette illustrations' to surface relevant results beyond exact keyword matches.

Allows users to create, organize, and reuse design components (buttons, cards, navigation bars) with support for variants (e.g., primary/secondary button states, different card layouts) and automatic propagation of changes across all instances. Components are stored in a shared library, and changes to the main component definition automatically update all instances in designs, with optional override capabilities for specific instances. Variants are managed through a property-based system where users define variant axes (e.g., 'size: small/medium/large', 'state: default/hover/active') and the system generates all combinations.

Converts design elements and layouts into production-ready code (HTML/CSS, React, Vue, or Tailwind) by analyzing the design structure and generating corresponding markup and styles. The system maps design properties (colors, typography, spacing, layout) to code equivalents, respects design tokens (e.g., color variables, spacing scales), and generates semantic HTML with accessibility attributes. Output can be customized by selecting target framework, design system tokens, and code style preferences.

Provides a centralized repository for brand assets and design tokens (colors, typography, spacing scales, component styles) that can be applied consistently across designs. Users define a brand kit with color palettes, font families, and spacing rules, and these tokens are automatically available in the design editor for selection. Changes to brand kit tokens propagate to all designs using them, ensuring brand consistency. The system supports color accessibility checking (contrast ratios) and typography pairing suggestions based on the defined fonts.

Offers a curated collection of pre-designed templates for common use cases (landing pages, social media posts, presentations, mobile app screens) that users can customize and adapt. Templates are organized by category and use case, include placeholder content and design system integration, and can be duplicated and modified without affecting the original. Templates are built using the platform's components and design tokens, so customizing the brand kit automatically updates all template instances.

Enables designers to preview and edit designs across multiple screen sizes (mobile, tablet, desktop) with breakpoint-based layout adjustments. The system allows users to define breakpoints (e.g., 320px, 768px, 1200px) and specify layout changes for each breakpoint (e.g., hide elements, adjust spacing, reflow grid). Preview mode shows designs at different viewport sizes, and changes can be made per-breakpoint without affecting other sizes. The system validates responsive behavior and flags potential issues (e.g., text overflow, unintended layout shifts).

Generates developer-friendly documentation from designs, including measurements, colors, typography specifications, and component usage guidelines. The system extracts design properties and generates a structured handoff document (HTML, PDF, or Markdown) with visual annotations, code snippets, and implementation notes. Designers can add custom annotations and comments to designs, which are included in the handoff document. The system supports exporting design specifications in standard formats (design tokens JSON, CSS variables) for direct use in development.