- [The Iron Law](#the-iron-law-of-tdd)

Chrome MCP browser testing. Console/network debugging, JS execution, GIF recording.

**Announce:** "I'm using dev-test-hammerspoon for macOS desktop automation."

<EXTREMELY-IMPORTANT>

Playwright MCP browser testing. Headless E2E, cross-browser, CI/CD automation.

ring:dev-testing

Design developer experiences that people love. Feedback loops, cognitive load, flow state, and ADHD-friendly patterns for tools and workflows.

Guide for development and code tools skills including document processing, browser automation, testing frameworks, and IDE integrations.

This skill should be used when the user asks to 'verify completion', 'check that tests pass', 'confirm feature works', or REQUIRED Phase 7 of /dev workflow (final). Enforces fresh runtime evidence before claiming completion.

COMPREHENSIVE Vue 3 development with Composition API, TypeScript, and advanced reactivity debugging. Create reactive components, handle props/events, implement lifecycle hooks, integrate with Pinia state management, debug reactivity issues, and optimize component performance. CRITICAL: All component changes MUST be tested with Playwright before claiming success. Use DevTools for debugging when available.

Enforces the standard development workflow for the fund-portfolio-bot project: read docs first, propose a small scoped design, respect version scope, and limit code changes. Use when implementing, modifying, or refactoring functionality in this repository.

Use when running builds, executing tests, or improving developer experience workflows - provides structured guidance for build/test execution and DX improvement.

Invoke DEVCOM_RESEARCH for deep research, cross-disciplinary analysis, and novel problem solving. Use when exploring cutting-edge concepts or investigating patterns that require theoretical foundation.

Develop examples for AI SDK functions. Use when creating, running, or modifying examples under examples/ai-functions/src to validate provider support, demonstrate features, or create test fixtures.

Developer Experience specialist for tooling, setup, and workflow optimization.

기능 개발 스킬. 타입 정의, Storage API, 비즈니스 로직. 코드 작성 시 사용.

Use when creating custom Bazel rules, toolchains, providers, or aspects. Use when extending Bazel for new languages, build systems, or custom actions. Use when debugging Starlark rule implementations or understanding Bazel build phases.

Use when working on Claude Code plugins (creating, modifying, testing, releasing, or maintaining) - provides streamlined workflows, patterns, and examples for the complete plugin lifecycle

Specialized Preact development skill for standards-based web applications with native-first architecture and minimal dependency footprint. Use when building Preact projects, particularly those involving data visualization, interactive applications, single-page apps with HTM syntax, Web Components integration, CSV/JSON data parsing, WebGL shader visualizations, or zero-build solutions with CDN imports.

Guides modern Python project development. Use when pyproject.toml or requirements.txt is detected. Supports Python 3.13 + uv + ruff + mypy environment, FastAPI/FastMCP implementation, pytest, and Docker configuration.

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Modern PHP 8.x development with type system, attributes, enums, error handling, and Composer. Use when writing PHP code or working with PHP projects.

Python 3.11+ development with type hints, async patterns, FastAPI, and pytest. Use for backend services, CLI tools, data processing, and API development.

Use when planning software development tasks, before writing code or implementation plans - refines rough technical ideas into fully-formed designs through collaborative questioning, alternative exploration, and incremental validation. For software architecture, components, data flow, and technical design decisions. Don't use during clear 'mechanical' coding processes

Defines coding standards, test patterns, and language conventions for this project. Use this when writing code, comments, documentation, or git commit messages.

1. Always try to use latest versions for dependencies.

Development stack standards - five-level maturity model, dimension specs, assessment criteria, tool guidance

Development process rules for this project including testing, branching, and commit standards. Use when implementing features, fixing bugs, or making any code changes.

Establish and scale a Developer Experience (DevEx) program to remove engineering friction and boost productivity. Use this when setting up a new DevEx team, diagnosing why an engineering org has slowed down, or measuring the specific ROI of AI coding tools.

File naming conventions, directory structure, and YAML frontmatter standards for CC-DevFlow. Consolidates shared conventions from all agents.

Enforces TDD order in TASKS.md - Tests MUST be marked complete before Implementation tasks. Blocks violations in real-time.

- Comprehensive network health assessment (all test devices)

Probe and test SDR hardware capabilities (RTL-SDR, SDRplay, HackRF, etc.). Use when verifying device detection, discovering supported sample rates and gains, testing antenna ports, or troubleshooting SDR hardware issues.

Capture screenshots from iOS Simulators, physical iOS devices, or Android devices during development. Use this skill to inspect UI layouts, debug rendering issues, verify text/color display, or captur

Interact with iOS simulators and verify app behavior using xcobra

Infrastructure, deployment, and operations automation

Expert DevOps engineer for CI/CD, IaC, Kubernetes, and deployment automation. Activate on: CI/CD, GitHub Actions, Terraform, Docker, Kubernetes, Helm, ArgoCD, GitOps, deployment pipeline, infrastructure as code, container orchestration. NOT for: application code (use language skills), database schema (use data-pipeline-engineer), API design (use api-architect).

CI/CD pipelines, infrastructure as code, and deployment strategies

Comprehensive DevOps and deployment workflow that orchestrates infrastructure automation, CI/CD pipelines, container orchestration, and cloud deployment. Handles everything from infrastructure as code and pipeline setup to monitoring, scaling, and disaster recovery.

devops-dx

Senior DevOps Engineer with expertise in CI/CD automation, infrastructure as code, monitoring, and SRE practices. Proficient in cloud platforms, containerization, configuration management, and building scalable DevOps pipelines with focus on automation and operational excellence.

DevOps specialist - CI/CD, deployment, infrastructure

Expert in DevOps practices including CI/CD pipelines, infrastructure as code, monitoring, and deployment strategies. Use for GitHub Actions, GitLab CI, Terraform, and production deployment questions.

DevOps Infrastructure Agent. 인프라 관리, 스케일링, 백업, 네트워크 설정을 담당합니다. 인프라, 스케일링(scale), 백업(backup), 네트워크 관련 요청 시 사용됩니다.

Manage deployment, Docker, CI/CD, server hardening, and infrastructure security. EXCLUSIVE to devops-engineer agent.

Coordinates infrastructure, CI/CD, and deployment tasks. Use when provisioning infrastructure, setting up pipelines, configuring monitoring, or managing deployments. Applies devops-standard.md with DORA metrics.

Gather DevOps context for infrastructure planning. Detects IaC tools, providers, and recommends skills. Use when /majestic:plan detects infrastructure work.

Platform-specific IaC checklists for DigitalOcean, Hetzner, AWS, and Cloudflare.

Operational runbook and procedure documentation specialist. Use when

提供部署、CI/CD、基础设施管理和 DevOps 自动化能力。当需要部署应用、配置基础设施或优化开发流程时使用。