Unit Testing

Write TypeScript runtime and type tests (project)

Creates and analyzes tests using Vitest and MSW patterns. Generates test builders, mocks repositories, and configures integration tests. Triggers on: write tests, test coverage, Vitest, MSW mock, vi.fn, vi.mock, unit test, integration test, test builder, mock setup, test failure.

Runs quality gate checks before commit or push. Executes lint fixes, TypeScript compilation, tests, and CI validation. Reproduces CI failures locally. Triggers on: pre-commit, pre-push, quality check, CI check, lint check, type check, validate changes, check:fix, pnpm test.

Copilot agent that assists with user interface and experience design, wireframes, prototypes, design systems, and usability testingTrigger terms: UI design, UX design, wireframe, mockup, prototype, user interface, user experience, design system, component library, accessibility, responsive designUse when: User requests involve ui ux designer tasks.

Activate when users ask about Claude Code installation, slash commands (/cook, /plan, /fix, /test, /docs, /design, /git), creating/managing Agent Skills, configuring MCP servers, setting up hooks/plugins, IDE integration (VS Code, JetBrains), CI/CD workflows, enterprise deployment (SSO, RBAC, sandboxing), troubleshooting authentication/performance issues, or advanced features (extended thinking, caching, checkpointing).

Validates compliance with 9 Constitutional Articles and Phase -1 Gates before implementation.Trigger terms: constitution, governance, compliance, validation, constitutional compliance,Phase -1 Gates, simplicity gate, anti-abstraction gate, test-first, library-first,EARS compliance, governance validation, constitutional audit, compliance check, gate validation.Enforces all 9 Constitutional Articles with automated validation:- Article I: Library-First Principle- Article II: CLI Interface Mandate- Article III: Test-First Imperative- Article IV: EARS Requirements Format- Article V: Traceability Mandate- Article VI: Project Memory- Article VII: Simplicity Gate- Article VIII: Anti-Abstraction Gate- Article IX: Integration-First TestingRuns Phase -1 Gates before any implementation begins.Use when: validating project governance, checking constitutional compliance,or enforcing quality gates before implementation.

DO NOT invoke directly - loaded by workflow agents via cc10x-router.Conditionally loaded by: code-reviewer (UI code), component-builder (UI component), bug-investigator (UI bug), integration-verifier (UI flow testing), planner (UI planning).Provides frontend patterns: UX, visual design, accessibility, responsive design. Iron Law: NO UI DESIGN BEFORE USER FLOW IS UNDERSTOOD.

Implement Clean Architecture principles in Go to create maintainable, testable, and framework-independent applications. Use when designing new Go applications or refactoring existing Go codebases.

Validates compliance with 9 Constitutional Articles and Phase -1 Gates before implementation.Trigger terms: constitution, governance, compliance, validation, constitutional compliance,Phase -1 Gates, simplicity gate, anti-abstraction gate, test-first, library-first,EARS compliance, governance validation, constitutional audit, compliance check, gate validation.Enforces all 9 Constitutional Articles with automated validation:- Article I: Library-First Principle- Article II: CLI Interface Mandate- Article III: Test-First Imperative- Article IV: EARS Requirements Format- Article V: Traceability Mandate- Article VI: Project Memory- Article VII: Simplicity Gate- Article VIII: Anti-Abstraction Gate- Article IX: Integration-First TestingRuns Phase -1 Gates before any implementation begins.Use when: validating project governance, checking constitutional compliance,or enforcing quality gates before implementation.

Systematic debugging framework ensuring root cause investigation before fixes. Includes four-phase debugging process, backward call stack tracing, multi-layer validation, and verification protocols. Use when encountering bugs, test failures, unexpected behavior, performance issues, or before claiming work complete. Prevents random fixes, masks over symptoms, and false completion claims.

Implement Clean Architecture principles in TypeScript for maintainable, testable, and framework-independent applications. Use when designing new TypeScript applications, refactoring existing code, or implementing domain-centric Node.js applications.

DO NOT invoke directly - loaded by workflow agents via cc10x-router.Always loaded by: component-builder, bug-investigator.Enforces RED-GREEN-REFACTOR cycle: failing test first, minimal code, clean up. Iron Law: NO PRODUCTION CODE WITHOUT A FAILING TEST FIRST.

Build modern mobile applications with React Native, Flutter, Swift/SwiftUI, and Kotlin/Jetpack Compose. Covers mobile-first design principles, performance optimization (battery, memory, network), offline-first architecture, platform-specific guidelines (iOS HIG, Material Design), testing strategies, security best practices, accessibility, app store deployment, and mobile development mindset. Use when building mobile apps, implementing mobile UX patterns, optimizing for mobile constraints, or making native vs cross-platform decisions.

Copilot agent that assists with comprehensive QA strategy and test planning to ensure product quality through systematic testing and quality metricsTrigger terms: QA, quality assurance, test strategy, QA plan, quality metrics, test planning, quality gates, acceptance testing, regression testingUse when: User requests involve quality assurance tasks.

Copilot agent that assists with comprehensive QA strategy and test planning to ensure product quality through systematic testing and quality metricsTrigger terms: QA, quality assurance, test strategy, QA plan, quality metrics, test planning, quality gates, acceptance testing, regression testingUse when: User requests involve quality assurance tasks.

Copilot agent that assists with user interface and experience design, wireframes, prototypes, design systems, and usability testingTrigger terms: UI design, UX design, wireframe, mockup, prototype, user interface, user experience, design system, component library, accessibility, responsive designUse when: User requests involve ui ux designer tasks.

test-engineer skillTrigger terms: testing, unit tests, integration tests, E2E tests, test cases, test coverage, test automation, test plan, test design, TDD, test-firstUse when: User requests involve test engineer tasks.

test-engineer skillTrigger terms: testing, unit tests, integration tests, E2E tests, test cases, test coverage, test automation, test plan, test design, TDD, test-firstUse when: User requests involve test engineer tasks.

Validates complete requirements traceability across EARS requirements → design → tasks → code → tests.Trigger terms: traceability, requirements coverage, coverage matrix, traceability matrix,requirement mapping, test coverage, EARS coverage, requirements tracking, traceability audit,gap detection, orphaned requirements, untested code, coverage validation, traceability analysis.Enforces Constitutional Article V (Traceability Mandate) with comprehensive validation:- Requirement → Design mapping (100% coverage)- Design → Task mapping- Task → Code implementation mapping- Code → Test mapping (100% coverage)- Gap detection (orphaned requirements, untested code)- Coverage percentage reporting- Traceability matrix generationUse when: user needs traceability validation, coverage analysis, gap detection,or requirements tracking across the full development lifecycle.

Implement Clean Architecture principles in Python to create maintainable, testable, and framework-independent applications. Use when designing new Python applications, refactoring existing code, or implementing domain-driven designs.