Documentation

Write and run Go tests using the built-in testing package with table-driven tests, subtests, and mocking via interfaces. Use when writing Go tests or setting up test infrastructure.

Write blog posts in Matt Palmer's formal voice. Use for tech blogs, company posts, tutorials, and professional content about AI-assisted development.

Create ticket directories with 1-definition.md from PRD and planning docs. Use this skill to initialize new tickets with self-contained context, relationships, testing draft, and expectations.

This skill should be used when the user asks to "create excalidraw diagram", "generate excalidraw", "hand-drawn diagram", "sketch diagram", "whiteboard style diagram", or when informal, spatial, annotated diagrams would best convey conceptual relationships. Expert in both presentation design AND artistic Excalidraw JSON creation.

Construct ASCII tree visualizations from parent/child work item data. Use when the user asks to "show hierarchy", "show tree", "display parent child", "visualize structure", "show feature tree", or wants to see work item relationships as a tree diagram. This skill teaches how to build trees from flat data WITHOUT code - use LLM reasoning only.

Test-Driven Development (TDD) using Vitest and TypeScript. Use when the user requests help with TDD, writing tests before code, test-first development, Vitest test setup, TypeScript testing patterns, unit testing, integration testing, or following the Red-Green-Refactor cycle with Vitest.

Guide experienced developers through RED phase of TDD cycle - writing failing tests and verifying expected failures

Master Claude Code plugin architecture, design patterns, and technical implementation. Learn to build scalable, maintainable plugins with proper structure, performance optimization, and security best practices.

Query up-to-date tool documentation using Context7. Use when you need current documentation for Python 3.14+, Claude Code CLI, or other configured tools.

Manage Google Docs with full document operations including reading content, inserting/appending text, find and replace, text formatting (bold, italic, underline), page breaks, document structure, and document creation. Use for document content operations, text insertion/replacement, formatting, structured document generation, and content extraction. This skill should be used for ALL Google Docs-related requests.

Expert skill for writing clean, maintainable Python code using modern patterns: dataclasses, type hints, SOLID principles, and best practices.

Writes, edits, and creates dbt models following best practices. Use when user needs to create new dbt SQL models, update existing models, or convert raw SQL to dbt format. Handles staging, intermediate, and mart models with proper config blocks, CTEs, and documentation.

Implement robust error handling with user-friendly messages, fail-fast validation, and graceful degradation patterns. When writing code that handles errors, exceptions, or failure scenarios. When implementing try-catch blocks, error boundaries, or error middleware. When validating input, checking preconditions, or handling external service failures. When designing retry strategies, resource cleanup, or centralized error handling. When creating user-facing error messages or logging error details. This skill applies to error handling across all types of code files.

Process and generate multimedia content using Google Gemini API for better vision capabilities. Capabilities include analyze audio files (transcription with timestamps, summarization, speech understanding, music/sound analysis up to 9.5 hours), understand images (better image analysis than Claude models, captioning, reasoning, object detection, design extraction, OCR, visual Q&A, segmentation, handle multiple images), process videos (scene detection, Q&A, temporal analysis, YouTube URLs, up to 6 hours), extract from documents (PDF tables, forms, charts, diagrams, multi-page), generate images (text-to-image with Imagen 4, editing, composition, refinement), generate videos (text-to-video with Veo 3, 8-second clips with native audio). Use when working with audio/video files, analyzing images or screenshots (instead of default vision capabilities of Claude, only fallback to Claude's vision capabilities if needed), processing PDF documents, extracting structured data from media, creating images/videos from text pr

Guide for writing high-quality acceptance criteria and acceptance tests using industry-standard BDD (Behavior-Driven Development) and ATDD (Acceptance Test-Driven Development) practices. Use this skill when creating acceptance criteria for user stories, writing Gherkin scenarios, or implementing acceptance test specifications following Given-When-Then format.

Generate professional visuals using Gemini via browser automation with 6-gate quality control.Use when creating chapter illustrations, diagrams, or teaching visuals.NOT for stock photos or decorative images.

Write Gherkin feature files and step definitions for BDD

Core engineering standards during implementation. Use when implementing features, writing production code, or when user mentions error handling, constants management, progress logging, or code quality standards.

Zod v4 schema patterns with .meta() for OpenAPI, transforms, refinements, and custom serializers. Triggers on zod, z.object, z.string, schema, validator.

Use when verifying C3 documentation quality - checks methodology compliance (layer rules, structure, diagrams) and implementation conformance (docs vs code drift)