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Complete Behavior-Driven Development workflow coordinating SCENARIO → STEP DEFINITIONS → IMPLEMENT → REFACTOR cycle with Given/When/Then scenarios. Use when writing BDD tests or implementing features from user stories.

Use when the user wants to analyze writing samples to extract voice patterns, create voice-replicating prompts, or refine content generation prompts to match a specific writing style

Master REST and GraphQL API design, authentication, security, error handling, documentation, and deployment. Learn HTTP semantics, resource modeling, rate limiting, versioning strategies, and build production-grade APIs serving millions of requests.

Generate professional investment reports for stocks and ETFs. Use when user requests market analysis, investment reports, stock analysis, or trading recommendations for financial instruments (SPY, AAPL, TSLA, etc.). Creates institutional-grade reports with technical indicators, AI-powered insights, charts, and investment recommendations.

Expert Go/Golang development including writing code, APIs, handlers, middleware, testing with go test, dependency management with go mod, and applying best practices from Context7. Use when user asks to write, modify, or debug Go code, mentions Golang, Go modules, go test, go build, REST APIs in Go, or working with .go files.

FastAPI - Modern Python web framework for building APIs with automatic validation, documentation, and async support. Use for API routes, dependency injection, Pydantic models, middleware, and authentication.

Manages LibSQL/Turso database schemas with Zod validation, creates migrations, and ensures type-safe database operations. Use when creating database tables, writing migrations, or implementing schema validation.

Deploy version-tagged documentation alongside releases using MkDocs Material, mike, and release-please for automated version alignment with software builds.

Look up Elm package documentation, list project dependencies, search the Elm package registry, and read module exports. Use when working with Elm projects, elm.json files, or needing information about Elm packages.

Generate and maintain comprehensive documentation including Doxygen comments, progress reports, session notes, and API docs for Orpheus SDK.

Download and aggregate web pages/docs into timestamped scratchpad files. Use when user asks to "concatenate all these resources", "get all these links", "checkout all these resources", or wants to gather fresh context from documentation URLs. All URLs from one prompt go into single file at docs/scratchpad/<timestamp>.md.

RESTful principles, versioning, security, rate limiting, and documentation.

Conventions for TypeScript types, interfaces, assertions, and type safety. Use when writing or reviewing TypeScript code.

Use when creating or editing reveal.js presentations, or when user mentions slides, presentations, reveal.js, code examples in slides, speaker notes, or slide design - enforces Tailwind CSS, proper code sizing, progressive reveal, semantic colors, and timing markers

End-to-end truth-case orchestration for the Phoenix VC fund-modeling platform. Use when running tests/truth-cases/runner.test.ts, computing module-level pass rates, updating docs/phase0-validation-report.md and docs/failure-triage.md, or deciding between Phase 1A/1B/1C.

Rust documentation practices for HASH codebase. Use when writing doc comments, documenting functions/types/traits/modules, creating error sections, using intra-doc links, or following rustdoc conventions.

Provides Notion workspace organization patterns, layout preferences, and workflow automation for personal productivity systems. Includes structure guidelines, content reuse patterns, and integration with external tools. MANDATORY: Claude must read this skill file before using any Notion MCP tools.

Interact with Obsidian vaults via obsidian-cli. Read, create, search, and manage markdown notes. Use when user references their Obsidian vault, wants to save information to notes, search their knowledge base, or organize their personal knowledge management system.

API design including REST, GraphQL, and gRPC. Master API architecture, documentation, versioning, and best practices.

Harmonize frontmatter and wikilinks in a note. Detects prose patterns, suggests frontmatter additions, and suggests wikilinks for frontmatter values. Triggers on "normalize note", "harmonize note", "sync frontmatter".