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Expert in Lighthouse Journey Timeline backend architecture, service patterns, testing, and API development using Express.js, TypeScript, and Drizzle ORM. Use when implementing backend services, APIs, controllers, database queries, authentication, permissions, error handling, testing server code, or writing migrations.

Execute the RED phase of TDD by writing a failing test for the next unmarked item in PLAN.md. Writes tests with Korean descriptions and confirms test failure.

Use when tracking Beads epic status, syncing progress to GitHub/Shortcut, generating dependency diagrams, or monitoring multi-repo work. Bridges Beads issue tracking with project management tools.

Write clean, readable code with consistent naming, formatting, and structure. Use this skill when writing any code that should follow team conventions. When naming variables, functions, classes, or files. When structuring functions to be small and focused. When removing dead code, avoiding duplication, or applying DRY principles. When configuring formatters or enforcing indentation standards.

Helps develop and build Docusaurus plugins using this starter template

Examines git diffs between commits or branches with intelligent analysis. Provides unified diff format with comprehensive summaries including file statistics, rename detection, and merge commit handling. Outputs formatted diffs to /claudedocs for documentation and review purposes.

TDD for process documentation - test with subagents before writing, iterate until bulletproof

Manage Confluence documentation with downloads, uploads, conversions, and diagrams. Use when asked to "download Confluence pages", "upload to Confluence", "convert Wiki Markup", "sync markdown to Confluence", "create Confluence page", or "handle Confluence images".

Guides BDD example-writing: intent-based steps, observable outcomes, and mapping steps to services.

Creating interactive data visualisations using d3.js. This skill should be used when creating custom charts, graphs, network diagrams, geographic visualisations, or any complex SVG-based data visualisation that requires fine-grained control over visual elements, transitions, or interactions. Use this for bespoke visualisations beyond standard charting libraries, whether in React, Vue, Svelte, vanilla JavaScript, or any other environment.

Create Mermaid diagrams (activity, deployment, sequence, architecture) from text descriptions or source code. Use when asked to "create a diagram", "generate mermaid", "document architecture", "code to diagram", "create design doc", or "convert code to diagram". Supports hierarchical on-demand guide loading, Unicode semantic symbols, and Python utilities for diagram extraction and image conversion.

Write strategic, behavior-focused tests for critical paths without over-testing during development. Use this skill when writing unit tests, integration tests, or end-to-end tests. When working on files in tests/, __tests__/, spec/, or any test files. When deciding what to test, naming test cases, or mocking external dependencies. When focusing on core user flows rather than edge cases during feature development.

ARCHIVE REFERENCE ONLY. Superseded by active `campaign-page-copy` skill. Use this as inspiration, not for invocation in the orchestrated flow.

Receive and act on code review feedback with technical rigor, not performative agreement or blind implementation

End-to-end testing for Blazor applications using Playwright for .NET. Use when writing E2E tests, creating test infrastructure, testing MudBlazor components, handling Blazor WebAssembly loading, debugging test failures, or setting up CI/CD test pipelines.

Use when unsure about command syntax, options, or behavior, or when the user asks to "check the man page", "look up the manual", or "what does [command] do". Consult system man pages for accurate, version-specific documentation.

Structured investigation with a persistent markdown log and evidence-first execution. Use when: investigating a user question, auditing behavior, verifying dependencies, or using MCP tools. Triggers: inspect, investigate, analyze, audit, verify, deepwiki. Default mode: MANIFEST_IO.

Use when implementing features or refactoring with TDD - enforces writing ONE test at a time, implementing minimal code to pass, then repeating, preventing batch test writing that defeats incremental design discovery

Performs intelligent compliance audits for software projects. Automatically detects which regulatory frameworks (GDPR, HIPAA, PCI-DSS, CCPA, SOC 2) apply based on project analysis and user context. Provides tiered reports with executive summaries and detailed technical findings. Use when the user asks about compliance, regulatory requirements, security standards, data protection, or wants to audit their codebase for legal/regulatory adherence.

Expert prompt engineering for LLMs and AI agents. Use when users request help writing, reviewing, or improving prompts for chatbots, AI agents, system prompts, instruction sets, or any LLM-based application. Applies research-backed techniques to minimize hallucinations and maximize reliability.