Expert AWS Cloud Advisor for architecture design, security review, and implementation guidance. Leverages AWS MCP tools for accurate, documentation-backed answers. Use when user asks about AWS architecture, security, service selection, migrations, troubleshooting, or learning AWS. Triggers on AWS, Lambda, S3, EC2, ECS, EKS, DynamoDB, RDS, CloudFormation, CDK, Terraform, Serverless, SAM, IAM, VPC, API Gateway, or any AWS service. Do NOT use for non-AWS cloud providers or general infrastructure without AWS context.

Migrate test files from `as` type assertions to @total-typescript/shoehorn. Use when user mentions shoehorn, wants to replace `as` in tests, or needs partial test data.

Guidance for creating Blazor components that emulate ASP.NET Web Forms controls. Use this when implementing new components or extending existing ones in the BlazorWebFormsComponents library.

Three.js textures - texture types, UV mapping, environment maps, texture settings. Use when working with images, UV coordinates, cubemaps, HDR environments, or texture optimization.

Three.js asset loading - GLTF, textures, images, models, async patterns. Use when loading 3D models, textures, HDR environments, or managing loading progress.

Extracts an SMV (NuSMV/nuXmv) finite-state model from code or state-machine descriptions, for CTL/LTL model checking of reactive systems. Use when verifying hardware-adjacent or embedded logic, when the state space is naturally finite and small, or when CTL branching-time properties are needed.

Scans source code for security vulnerabilities by applying Project CodeGuard rules — injection, unsafe deserialization, XSS, path traversal, broken access control. Use when performing a security audit, when reviewing a PR that touches request handlers or database queries, when the user asks for a vulnerability scan, or when wiring security checks into CI.

Matches code against Project CodeGuard's catalog of known-dangerous patterns — banned C functions, weak crypto primitives, hardcoded credentials, deprecated APIs. Use when grepping for low-hanging security fruit, when enforcing a ban-list in CI, or when the user asks to check for known-bad patterns.

This skill embodies the principles of "Clean Code" by Robert C. Martin (Uncle Bob). Use it to transform "code that works" into "code that is clean."

This skill should be used when the user says "review PR", "review pull request", "check PR comments", "review PR feedback", "review PR 123", "analyze PR comments", "validate PR review", "address PR feedback", "fix PR issues", "what did the reviewer say", "review Bitbucket PR", or wants to validate GitHub or Bitbucket PR review comments, categorize findings, and optionally connect back into the Arness pipeline for fixes. Do NOT use this for creating PRs (use arn-code-ship) or reviewing implementation quality (use arn-code-review-implementation).

This skill should be used when the user says "naming", "brand name", "name my product", "find a name", "product naming", "brand naming", "what should I call it", "name ideas", "pick a name", "naming session", "help me name this", "brainstorm names", "come up with a name", "arn spark naming", "arn-spark-naming", or wants to find a brand name for their product through strategic analysis, creative generation, qualitative scoring, and due diligence including domain availability and trademark screening.

This skill should be used when the user says "batch implement", "implement all", "batch execution", "implement all features", "parallel implement", "implement in parallel", "arness batch implement", "arn-code-batch-implement", "run batch implementation", "implement everything", "launch batch workers", or wants to spawn parallel worktree-isolated background agents to implement multiple pending features simultaneously. Each worker runs as a full independent session with all tools. This skill requires pending plans in .arness/plans/ — run arn-code-batch-planning first if none exist.

Stop and consult this skill whenever your response would include specific facts about Anthropic's products. Covers: Claude Code (how to install, Node.js requirements, platform/OS support, MCP server integration, configuration), Claude API (function calling/tool use, batch processing, SDK usage, rate limits, pricing, models, streaming), and Claude.ai (Pro vs Team vs Enterprise plans, feature limits). Trigger this even for coding tasks that use the Anthropic SDK, content creation mentioning Claude capabilities or pricing, or LLM provider comparisons. Any time you would otherwise rely on memory for Anthropic product details, verify here instead — your training data may be outdated or wrong.

To access Anthropic's official brand identity and style resources, use this skill.

Guides the creation of detailed agile feature documentation from an existing epic. Use when the user wants to split an epic into feature files, derive features with scope and acceptance criteria, or plan feature documentation for stakeholders or engineering. This should trigger for requests such as Create features from an epic; Split epic into features; Feature files from epic; Derive features from epic. Part of cursor-rules-java project

Generate comprehensive market research reports (50+ pages) in the style of top consulting firms (McKinsey, BCG, Gartner). Features professional LaTeX formatting, extensive visual generation with scientific-schematics and generate-image, deep integration with research-lookup for data gathering, and multi-framework strategic analysis including Porter Five Forces, PESTLE, SWOT, TAM/SAM/SOM, and BCG Matrix.

Create professional research posters in LaTeX using beamerposter, tikzposter, or baposter. Support for conference presentations, academic posters, and scientific communication. Includes layout design, color schemes, multi-column formats, figure integration, and poster-specific best practices for visual communication.

**WORKFLOW SKILL** — Write and run Terraform tests (.tftest.hcl). WHEN: "create terraform test", "write tftest", ".tftest.hcl", "mock provider", "test module", "test assertion". USE FOR: test files, run blocks, assertions, mock providers, plan-mode unit tests, apply-mode integration tests, test troubleshooting. DO NOT USE FOR: Bicep code, architecture decisions, deployment (use azure-deploy).

**UTILITY SKILL** — Python diagram generation: WAF/cost/compliance charts (matplotlib), architecture diagrams (diagrams library), ERDs, swimlanes, timelines, wireframes (graphviz). WHEN: "WAF bar chart", "cost donut chart", "compliance gap chart", "Python architecture diagram", "ERD diagram", "swimlane", "UI wireframe". USE FOR: WAF bar charts, cost donut/projection charts, compliance gap charts, Python architecture diagrams, ERD diagrams, business process flows, timeline/Gantt charts, UI wireframes. DO NOT USE FOR: Draw.io architecture diagrams (use drawio), inline Mermaid (use mermaid).