playbooks-virtuoso

Acceptance criteria compliance checker. Maps code changes against acceptance criteria one-by-one, reporting PASS/FAIL/PARTIAL/UNTESTED per criterion. Delegate when you need to verify that implementation satisfies its specification before merging.

System architecture agent for technical design, component boundaries, API contracts, and ADRs. Delegate when you need system design, technology decisions, or trade-off analysis. Use proactively for design reviews.

Backend development agent for API implementation, data modeling, and testing. Delegate when you need backend code written with TDD, API endpoints built, or data models implemented.

Zero-context code reviewer. Reviews changes cold - no spec, no project knowledge, no domain context. Catches what familiarity blinds you to. Delegate when you want a fresh-eyes pass before merging, or as part of a multi-perspective review.

Mid-workflow change management agent. Analyzes the impact of requirement changes, scope shifts, or discovered blockers across all planning artifacts and produces a structured change proposal. Delegate when things go wrong mid-implementation, when requirements change after planning, or when a blocker requires re-planning.

Web accessibility patterns and WCAG 2.1/2.2 compliance for inclusive user interfaces. Use when the user asks to build accessible components, audit a UI for a11y issues, fix screen reader problems, implement keyboard navigation, check color contrast ratios, add ARIA attributes, create accessible forms, or establish accessibility standards for a team. Covers the POUR principles (Perceivable, Operable, Understandable, Robust), semantic HTML, focus management, and automated/manual a11y testing strategies.

REST and GraphQL API design principles for consistent, predictable, and evolvable APIs. Use when the user asks to design a new API, review an existing API, choose between REST and GraphQL, plan API versioning, define error response contracts, implement pagination, or establish API standards for a team. Covers resource modeling, endpoint naming, HTTP methods, status codes, authentication patterns, rate limiting, HATEOAS, and API evolution strategies.

CI/CD pipeline patterns and deployment strategies for automated, reliable software delivery. Use when the user asks to design a build pipeline, choose a deployment model (blue-green, canary, rolling), configure environment promotion, manage build artifacts, implement zero-downtime deployments, set up quality gates, or improve delivery workflow speed and reliability. Covers pipeline stage ordering, test parallelization, caching, secrets in CI, and rollback strategies.

Clean Architecture, Hexagonal Architecture (Ports and Adapters), and Domain-Driven Design fundamentals. Use when the user asks to design system architecture, define layer boundaries, apply DDD tactical patterns (entities, value objects, aggregates, repositories), structure a hexagonal application, enforce dependency rules, or evaluate whether a codebase needs architectural refactoring. Covers bounded contexts, use cases, domain services, and framework-independent design.

Database design patterns and data modeling for relational and NoSQL databases. Use when the user asks to design a database schema, normalize or denormalize tables, create indexing strategies, plan schema migrations, model temporal data, implement audit trails, set up table partitioning, or optimize data access patterns. Covers entity relationships, naming conventions, constraint design, migration safety, and performance-oriented schema decisions.