Claude Skills

Test-Driven Development (TDD) expertise covering red-green-refactor cycle, behavior-driven development, test-first design, refactoring with confidence, TDD best practices, TDD workflow, unit testing strategies, mock-driven development, test doubles, TDD patterns, SOLID principles through testing, emergent design, incremental development, TDD anti-patterns, and production-grade TDD practices. Activates for TDD, test-driven development, red-green-refactor, test-first, behavior-driven, BDD, refactoring, test doubles, mock-driven, test design, SOLID principles, emergent design, incremental development, TDD workflow, TDD best practices, TDD patterns, Kent Beck, Robert Martin, Uncle Bob, test-first design.

Automated billing systems for SaaS subscription management, invoicing, and payment recovery. Use when implementing recurring billing, automating invoice generation, or handling failed payment dunning. Covers proration calculations, billing cycle management, usage-based billing, and tax compliance (VAT/GST).

Master TDD orchestrator for strict red-green-refactor discipline, multi-agent test-driven workflows, and TDD intent detection. Use when implementing TDD across complex features, coordinating test and implementation agents, enforcing TDD cycle discipline, or wanting to write tests first. Covers modern TDD practices, test isolation, quality gates, and TDD education.

Technical lead bridging architecture and implementation for code quality and guidance. Use when reviewing code, refactoring for maintainability, or breaking features into implementation tasks. Covers design patterns, SOLID principles, code organization, and technical debt management.

Generate tasks.md with embedded test plans in BDD format, one user story at a time to prevent crashes. Use for test-first task planning where each task includes Given/When/Then scenarios. Produces implementation tasks with inline test specifications.

LLM-native translation skill that uses the current session for zero-cost SpecWeave content translation. Use when translating CLI messages, templates, documentation, or living docs to other languages. Supports multilingual output and internationalization workflows.

DevOps and IaC expert for Terraform, Kubernetes, Docker, CI/CD pipelines, and deployment platform decisions (Vercel vs Cloudflare vs Hetzner). Generates infrastructure ONE COMPONENT AT A TIME to prevent crashes.

Full-stack observability architect for Prometheus, Grafana, OpenTelemetry, distributed tracing (Jaeger/Tempo), SLIs/SLOs, error budgets, and alerting. Use for metrics, dashboards, traces, or reliability engineering.

Machine learning pipeline builder for end-to-end ML systems. Covers feature engineering, model training, evaluation, hyperparameter tuning, AutoML, and explainability (SHAP/LIME). Use for ML pipelines, model training, or building production ML systems.

Domain-specific ML expert for NLP, Computer Vision, and Time Series. Text classification, NER, sentiment (BERT, transformers), image classification, object detection (YOLO, ResNet), and forecasting (ARIMA, Prophet, LSTM). Use for specialized ML domains.

React Native and Expo mobile architect. New Architecture (Fabric, Turbo Modules, JSI), Expo Router, offline-first patterns. Use for mobile app architecture and React Native design.

React Native and Expo expert for environment setup, Metro bundler, native modules, device testing, performance optimization, and debugging. Use for RN setup, build issues, or mobile debugging.

PCI DSS compliance expert for secure payment card handling and audit preparation. Use when implementing card tokenization, encrypting payment data, or preparing for PCI compliance audits. Covers SAQ levels, data minimization, access control, and audit logging requirements.

End-to-end testing expert for Playwright, Cypress, visual regression (Percy, Chromatic), and UI testing. Use for E2E tests, browser automation, visual diffs, or debugging flaky tests.

Expert QA engineer for test strategy and automation. Use when writing tests, fixing failing tests, or improving test coverage.

Mermaid diagrams following C4 Model and SpecWeave conventions - system architecture, sequence, ER, deployment diagrams. Use for architecture visualization.

Generate Mermaid diagrams following C4 conventions. Activates for create diagram, draw diagram, visualize, system diagram, architecture diagram, C4 diagram, context diagram, container diagram, component diagram, sequence diagram, ER diagram, entity relationship, data model, deployment diagram. Coordinates with diagrams-architect agent.

Documentation view expert for Docusaurus integration. Launches interactive server for SpecWeave living documentation with hot reload, auto-generated sidebar, and Mermaid diagrams. Works in ANY SpecWeave project with auto-setup. Supports both internal (port 3015) and public (port 3016) docs. Activates for preview docs, view documentation, Docusaurus server, docs UI, documentation website, local docs server, hot reload docs, static site build.

Spec-driven brainstorming and product discovery expert. Helps teams ideate features, break down epics, conduct story mapping sessions, prioritize using MoSCoW/RICE/Kano, and validate ideas with lean startup methods. Activates for brainstorming, product discovery, story mapping, feature ideation, prioritization, MoSCoW, RICE, Kano model, lean startup, MVP definition, product backlog, feature breakdown.

Executive documentation from technical living docs - business summaries, progress dashboards, feature status reports. Use for stakeholder communication.

Technical writing expert for API documentation, README files, tutorials, changelog management, and developer documentation. Covers style guides, information architecture, versioning docs, OpenAPI/Swagger, and documentation-as-code. Activates for technical writing, API docs, README, changelog, tutorial writing, documentation, technical communication, style guide, OpenAPI, Swagger, developer docs.

FinOps expert for AWS/Azure/GCP cost optimization - right-sizing, reserved instances, savings plans, spot instances. Use for reducing cloud costs.

Analyze completed development work to identify automation and systematization opportunities. Use after finishing features, fixing bugs, or completing code reviews. Triggers on "analyze for automation", "what can we automate", "compound opportunities", "systematize".

This skill should be used when the user asks to "commit", "make a commit", "commit my changes", "create commits", "git commit", or wants to commit staged/unstaged changes with logical grouping and conventional commit format.