Toolkit for structuring hypotheses, variants, guardrails, and measurement

Comprehensive guide to A/B testing, multivariate testing, statistical significance, and experiment analysis for data-driven product decisions

Provides comprehensive report generation and refinement capabilities. Following the skill-creator pattern, this plugin handles both:

Create a new experiment workspace directory: initialize git, write an AGENTS.md goal doc, and create references/ with index.md + notes/links markdown plus GitHub repos cloned under references/repos (gitignored). Use when the user asks to spin up a scratch/research/experiment folder and provides repos, links, and/or notes to collect.

experiment-tracker

Planning or executing thesis experiments. Covers the lifecycle from ideation through polishing, tracking table, SPEC.md format, stage structure.

Do experiment-driven research (hypotheses → minimal repros → evidence) and continuously improve research skills + tooling. Use when behavior is uncertain, contested, or performance-sensitive.

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Comprehensive guidance for understanding, designing, and implementing expert systems using rule-based inference, knowledge representation, and the complete development lifecycle. Use when users need help with expert system concepts, architecture design, rule-based reasoning (forward/backward chaining), knowledge acquisition, development planning, or implementation strategies.

Design YAML expertise file structures for agent experts. Use when creating mental models for domain-specific agents, defining expertise schema, or structuring knowledge for Act-Learn-Reuse workflows.

Explain all bluera-base plugin functionality in human-readable format

Explain how code works in detail. Use when trying to understand unfamiliar code, complex logic, or system architecture.

Write scripts for educational and explainer videos that teach effectively

Exploit researcher persona specializing in attack surface analysis, exploit scenario generation, and vulnerability chaining

Master ε-greedy, UCB, curiosity-driven, RND, intrinsic motivation exploration

Produce structured spec.md from brainstorm conversations. Creates a consistent format that feeds cleanly into the planning phase.

Systematic exploratory data analysis process - discover patterns in unfamiliar data, identify meaningful insights, formulate specific questions for deeper investigation

Advanced exploratory testing techniques with Session-Based Test Management (SBTM), RST heuristics, and test tours. Use when planning exploration sessions, investigating bugs, or discovering unknown quality risks.

Prototype and explore technical approaches. Use when (1) multiple valid technical approaches exist, (2) performance characteristics unknown, (3) implementation path unclear, (4) need evidence-based technical recommendation.

Explores data in a Bauplan lakehouse safely using the Bauplan Python SDK. Use to inspect namespaces, tables, schemas, samples, and profiling queries; and to export larger result sets to files. Read-only exploration only; no writes or pipeline runs.

You are an expert codebase exploration specialist with deep understanding of code patterns, architectural structures, and implementation details. Your expertise lies in efficiently navigating unfamili

Semantic search for codebases. Locates matches with ripgrep and expands them into full AST nodes (functions/classes) using tree-sitter. Returns complete, syntactically valid code blocks rather than fragmented lines. Use when looking for specific implementations, examples, or references where full context is needed.

Comprehensive audit of Expo/React Native app API integration layer. Use when asked to: (1) Review API interactions, auth handling, or token management, (2) Find hardcoded data or screens bypassing API, (3) Verify user interactions properly sync to backend, (4) Analyze offline behavior and caching, (5) Audit Orval/OpenAPI code generation, (6) Check for API security issues. Supports TanStack Query, Zustand, axios, Expo Router, expo-secure-store, and expo-constants patterns.

Эксперт Expo конфигурации. Используй для React Native Expo, app.json и EAS Build.

Complete documentation for Expo SDK modules. Read docs before working with Expo libraries and when stuck on problems. New things (you don't know about them) include expo-glass. When user mentiones glass use expo-glass.

Expo Framework-specific guidelines. Includes best practices for Views, Blueprints, and Extensions.

Designs modern, clean iOS screens and components for Expo React Native apps following Apple HIG with safe areas, Dynamic Type, dark mode, accessibility, Liquid Glass materials, and App Store readiness.

Building great Expo native modules for iOS and Android. Views, APIs, Marshalling, Shared Objects, Expo Documentation, Verifying Expo modules.

Expo SDK 54+ workflows, EAS Build/Update, Expo Router v6, native tabs. Use for Expo development or OTA update strategies.

Generates Express.js API routes with proper middleware, error handling, validation, and TypeScript support. Use when creating REST APIs or Express endpoints.

Expert knowledge of Express.js and Node.js for building production-ready web applications and APIs. Covers middleware patterns, routing, async/await error handling, security, performance optimization, proxy patterns, static file serving, and production deployment. Use when working with server.js, adding routes, implementing middleware, debugging Express issues, or optimizing API endpoints.

Migrate Express.js REST APIs to Fastify with automated testing, performance benchmarking, and schema generation. Use when migrating Express applications to Fastify, modernizing Node.js APIs, improving API performance, or when users mention Express to Fastify migration, Fastify conversion, API modernization, or performance optimization of Express apps.

Express + TypeScript starter with Biome, Docker, and Vitest.

Expert in legal entitlement to compensation components including market value framework (valuation date, highest and best use, special purchaser exclusion), disturbance damages legal tests (causation, reasonableness, foreseeability), injurious affection framework (Antrim test, construction vs. permanent), and business losses compensability. Use when analyzing legal entitlement (not valuation amount). Key terms include legal entitlement, valuation date, highest and best use, but-for test, Antrim four-part test, goodwill non-compensable

Outline extension implementing protocol for documentation domain

Outline extension skill for plugin development domain - discovery, analysis, deliverable creation

Triage extension for documentation findings during plan-finalize phase

Triage extension for Java findings during plan-finalize phase

You are a specialized assistant for helping users choose the right Claude Code extensibility features. Your purpose is to analyze use cases and recommend the most appropriate approach from Skills, Com

Use this skill when the user needs help building, testing, or deploying custom LimaCharlie extensions.

Review and track progress against official 3D Slicer Extension Index requirements

Apply modern browser extension toolchain patterns: WXT (default), Plasmo, CRXJS for Chrome/Firefox/Safari extensions. Use when building browser extensions, choosing extension frameworks, or discussing manifest v3 patterns.

Migrates IdeaVim extensions from the old VimExtensionFacade API to the new @VimPlugin annotation-based API. Use when converting existing extensions to use the new API patterns.

Comprehensive guide for configuring, troubleshooting, and implementing External-DNS across Azure DNS, AWS Route53, Cloudflare, and Google Cloud DNS. Use when implementing automatic DNS management in Kubernetes, configuring provider-specific authentication (managed identities, IRSA, API tokens), troubleshooting DNS synchronization issues, setting up secure production-grade external-dns deployments, optimizing performance, avoiding rate limits, or implementing GitOps patterns with ArgoCD.

Verify external libraries, APIs, and frameworks against current documentation before writing code. Use when about to implement features using external dependencies, when writing import statements for third-party libraries, when unsure if a pattern or method is current, or when the user mentions grounding or verification.

Choose optimal external AI models for code analysis, bug investigation, and architectural decisions. Use when consulting multiple LLMs via claudish, comparing model perspectives, or investigating complex Go/LSP/transpiler issues. Provides empirically validated model rankings (91/100 for MiniMax M2, 83/100 for Grok Code Fast) and proven consultation strategies based on real-world testing.

Conduct comprehensive external network penetration testing including OSINT reconnaissance, subdomain enumeration, exposed service discovery, vulnerability scanning, and exploitation of internet-facing

Expert guide for setting up bidirectional sync between SpecWeave and GitHub Issues, JIRA, or Azure DevOps. Use when configuring external tool integration, mapping fields between systems, or troubleshooting sync issues. Covers webhook setup, authentication, and conflict resolution strategies.

Manage offline reference material in the `extra/` directory. Use when needing external documentation, library source code, screenshots, PDFs, or API specs. ALWAYS check `extra/` before web searches. HALT and ask the human when required material is missing - do NOT fall back to WebFetch/WebSearch.