G2 Frontend Guru - Autonomous UI Builder

Across G2, product teams, designers, and builders are creating bespoke UI prototypes in isolation — each one shaped by individual judgment, personal tools, and varying levels of familiarity with our design system. The result is a sprawl of inconsistent interfaces that don't reflect Elevate 2.0, making it harder to ship cohesive product experiences and increasing the rework required to bring prototypes up to standard.

Frontend Guru solves this by meeting people where they are. Anyone at G2 — regardless of their technical background — can bring any UI input (a live URL, a screenshot, a rough mockup, or even a plain text description) and have the agent automatically rework it into a design-system-compliant, production-ready output. No Elevate expertise required. No manual translation from prototype to polished UI.

The result: faster iteration, consistent outputs, and a shared standard across every team building product at G2 — all in 5–8 minutes.

5-Step Autonomous Process

Step 1: Input Collection User invokes /build-ui command in Claude Code. System presents 4 input options via interactive menu: a URL to a live page, a screenshot or mockup image, a text description of the layout, or existing HTML or React code to convert. User selects an input type and provides source material.

Step 2: Intelligent Analysis The Analyzer agent examines the source and creates a comprehensive section inventory. It identifies all distinct sections (navigation, hero, features, pricing, footer, etc.), estimates complexity and line counts, tags each section with features (CTAs, icons, forms, badges, tables, etc.), and creates a visual enhancement strategy determining which 1–2 sections get expressive treatment while others stay minimal.

Step 3: Strategic Planning The Planner agent creates an optimal build strategy to prevent context overflow. It calculates total estimated lines, breaks work into chunks (500 lines = 2 chunks, 1200 lines = 4 chunks), assigns sections to each chunk, and determines WRITE vs APPEND operations for efficient file building.

Step 4: Compliant Building The Builder agent transforms the source into Elevate-compliant code. It extracts content and structural intent (not visual styling), replaces non-compliant patterns with design system equivalents, applies visual enhancements strategically based on section tier (max 2 per page), uses proper Elevate components (.btn, .elv-status-badge, .search-input, .elv-index-nav, .chip), follows 40+ design system rules automatically, and builds exactly what the section inventory specifies — no duplication or fabrication.

Step 5: Validation & Refinement The Validator runs selective validation checking only relevant rules per section based on feature tags (97% faster than full validation). If violations are found, the Refiner agent automatically fixes them. The Converter then creates a standalone HTML file with embedded Elevate CSS for instant browser preview.

Frontend Guru gives anyone at G2 the ability to go from rough prototype to polished, design-system-compliant UI — fast, consistently, and without needing to know Elevate 2.0 inside and out.

The autonomous multi-agent workflow handles analysis, planning, building, validation, and refinement without human intervention. Every output passes all 40+ Elevate 2.0 validation rules and is delivered in two formats: a React component ready for integration, and a standalone HTML preview for instant review. The system works with any design input and automatically adapts to different page complexities — so whether you're a PM sketching a concept or a developer converting existing code, the output meets the same standard.

Architecture

The system is built on 6 specialized agents orchestrated sequentially, using a selective validation system with feature-based rule matching (97% faster than full validation). Strategic visual enhancement is handled through principle-based guidance rather than prescriptive code. Chunk-based building prevents context window overflow, and the system automatically retries with refinement on any validation failures.

Design Patterns

Multi-agent orchestration passes state via JSON files between agents. Tag-based feature detection drives efficient validation, and a visual tier system (hero/feature/standard) governs how sections are treated. The core philosophy is transform-not-replicate: the system extracts content and replaces all styling to match the design system rather than cloning the source. Inline styles are used for gradients as a workaround for Tailwind CSS variable limitations, and the Builder has flexibility to choose approaches that work best (solid color vs gradient, etc.).

Outputs

The system produces a React/Next.js component (page.tsx) ready for integration, a standalone HTML file with embedded 5,527 lines of Elevate CSS for browser preview, and build artifacts saved to /tmp for debugging (section inventory, build plan, progress tracker, validation report).

Components Used

All components are drawn from official Elevate 2.0 classes (.btn, .elv-status-badge, .search-input, .elv-index-nav, .chip), with Lucide React icons (no emojis), design system color tokens (var(--elv-bg-primary), var(--elv-text-default), etc.), G2 brand colors (#ff492c MyG2 orange, #1b1927 MyG2 dark), Figtree font with proper [elv] attribute selector, and the official G2 logo from company.g2.com/hubfs.

Visual Enhancement System

A maximum of 1–2 sections per page receive enhanced visual treatment, maintaining restraint across the full output. There are 5 approved patterns: expressive hero, subtle accent border, dark contrast section, elevated cards, and standard minimal. The Builder selects what works best rather than being forced into a specific implementation. These constraints are enforced via validation rules (Rule 3.50–3.52).

Requirements

Frontend Guru requires the Claude Code CLI installed and configured, access to the ~/Developer/frontend-guru/ directory structure, internet access for fetching source URLs, and a browser for HTML preview auto-open.

Limitations

The source must be publicly accessible (no auth-protected pages). The system works best for landing pages, dashboards, and marketing pages rather than complex web applications. Gradients must use actual hex colors since CSS variables in linear-gradient don't work reliably. Builds are limited to approximately 2,000 lines due to context window constraints, and HTML preview requires local file system access.

Design System Specifics

Frontend Guru is built for G2 Elevate 2.0 and is not adaptable to other design systems. Visual enhancements are strictly limited to 2 per page to prevent over-styling. Emojis, decorative circles, and rainbow colors are blocked by validation. CTA hierarchy is enforced (max 2–3 primary buttons per page), and section backgrounds are limited to a maximum of 1 gradient and 1 dark section.