Skill UI

This skill defines mandatory architectural standards and best practices for developing robust, scalable, and observable backend services using Node.js, Express, and TypeScript. It mandates layered architecture (Routes → Controllers → Services → Repositories), strong error handling, dependency injection, and input validation (Zod) to ensure maintainability and reliability in production environments. Use when designing or refactoring core API logic.

Provides a production-ready Documenso reference architecture with example project layout, layered components, data flow, and webhook setup so teams can design, review, and standardize document signing integrations.

Design layered short-term, long-term, and graph-based memory systems so agents persist across sessions, keep entity consistency, and reason over accumulated knowledge during conversations.

Provides a best-practice Supabase reference architecture, outlining the layered directory structure, cached client wrapper, tailored error handling, and health checks useful when designing new integrations or reviewing project standards.

A comprehensive guide for defining, tracking, and interpreting product metrics across all stages—from discovery to maturity. This skill covers selecting metric frameworks (AARRR, HEART), defining stage-appropriate KPIs, designing multi-layered dashboards, and executing deep analyses like cohort and retention modeling. It helps teams transform raw data into actionable product strategies, moving beyond vanity metrics.