TanStack Start full-stack React framework with Bun runtime. Use for TanStack Router, server functions, vinxi, or encountering SSR, build, preset errors.

Use for bun:test syntax, assertions, describe/it, test.skip/only/each, and basic patterns.

Use for test coverage with Bun, --coverage flag, lcov reports, thresholds, and CI integration.

Use for test lifecycle hooks: beforeAll, afterAll, beforeEach, afterEach, fixtures, preload.

Use for mock functions in Bun tests, spyOn, mock.module, implementations, and test doubles.

Configure Bun's built-in test runner with Jest-compatible APIs. Use when setting up testing infrastructure, writing unit/integration/snapshot tests, migrating from Jest, or configuring test coverage. 3-10x faster than Jest.

Bun has built-in WebSocket support integrated with `Bun.serve()`.

Use for Web Workers in Bun, worker_threads, parallel processing, and background tasks.

Bundle size analysis and optimization for Webpack, Vite, and esbuild

Analyzes JavaScript bundle sizes, identifies optimization opportunities, and helps reduce bundle size for faster page loads.

Bundle size reduction strategies, icon optimization, tree-shaking, and performance analysis. Use when reducing bundle size or optimizing imports.

You are an expert in optimizing JavaScript bundle sizes and build performance

Monitor JavaScript bundle size and execution performance. Use when tracking bundle size, identifying large chunks, or optimizing load performance.

How to create & maintain TypeDoc site documentation and the README for Bupkis

Business analysis skill for requirements gathering, market research, strategic analysis, and project brief creation. Use when users need to (1) Create comprehensive project briefs, (2) Conduct market or competitive analysis, (3) Facilitate brainstorming sessions, (4) Define problems and validate assumptions, (5) Elicit requirements through structured questioning, (6) Create user personas, or (7) Analyze project feasibility and scope

Business process analysis, requirements documentation, and workflow optimization for retail, supply chain, and technology organizations

This skill should be used when the user requests to create professional business documents (proposals, business plans, or budgets) from templates. It provides PDF templates and a Python script for generating filled documents from user data.

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Business model design using Osterwalder's Business Model Canvas and Lean Canvas. Creates 9-block canvases with structured analysis for business model innovation and startup validation.

Business model design using Alexander Osterwalder's 9 building blocks. Use when: business model, canvas, value proposition, customer segments, revenue streams, startup planning, analyze business, business strategy.

Complete Business Model Canvas design with all 9 blocks analyzed. Transforms validated ideas into viable business models with revenue clarity and operational strategy.

Transform any boring B2B business problem into a complete software blueprint with architecture, database schema, feature breakdown, and step-by-step implementation plan formatted as a CLAUDE.md file ready for development.

Business strategy expert - defines users, value propositions, use cases, and business requirements. Connects technical development with market realities and ROI. Includes LATAM market (Chile) specialization.

MBA-trained business strategist with full commercial awareness. USE WHEN user says 'business plan', 'financial analysis', 'P&L', 'cash flow', 'valuation', 'market analysis', 'competitive analysis', 'SWOT', 'business model', 'unit economics', 'fundraising', 'pitch deck', or needs strategic business guidance.

Add cinematic lerp-based smooth scrolling for all scroll inputs (mouse wheel, trackpad, touch). Creates butter-smooth momentum scrolling like premium agency websites. Works alongside existing smooth-scroll anchor links.

Beads Viewer - graph-aware triage engine for Beads issue tracker with 9 graph metrics (PageRank, betweenness, HITS, etc.), dependency-aware planning, and purpose-built robot protocol for AI agents.

Align DNA short reads to reference genomes using bwa-mem2, the faster successor to BWA-MEM. Use when aligning DNA short reads to a reference genome.

Expert skill for bytecode virtual machine design including instruction set design, dispatch mechanisms, and stack/register architectures

Manages project knowledge using ByteRover context tree. Provides two operations: query (retrieve knowledge) and curate (store knowledge). Invoke when user requests information lookup, pattern discovery, or knowledge persistence.

Use when implementing data structures in C including arrays, linked lists, trees, and hash tables with manual memory management.

<purpose>

Convert C/C++ project build.sh and test.sh scripts to support incremental builds. Use when fixing build scripts for re-execution after docker commit, converting to out-of-tree builds, or making scripts idempotent for repeated execution.

Use when managing memory in C programs with malloc/free, pointers, and avoiding common memory safety pitfalls.

Write efficient C code with proper memory management, pointer

Guidelines for C# development including Blazor, Unity game development, and .NET backend best practices

c3-alter

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

Use when documenting component implementation patterns, internal structure, or hand-off points - enforces NO CODE rule and diagram-first approach for leaf-level C3 documentation

Use when changes affect component organization, technology stack, or cross-container communication - triggered by new components, pattern changes, or needing to map external interfaces to internal components

Use when designing, updating, or exploring system architecture with C3 methodology - iterative scoping through hypothesis, exploration, and discovery across Context/Container/Component layers

c3-query

Generate software architecture documentation using C4 model diagrams in Mermaid syntax.

Creates and manages C4 architecture diagrams using PlantUML. Use when the user wants to visualize software architecture, create context/container/component/sequence diagrams, document system design with the C4 model, or mentions architecture diagrams, system design, or PlantUML. Supports iterative diagram building through conversational workflow.

Review C99 code for compliance with HBF's strict coding standards including compiler warnings, Linux kernel style, and licensing constraints. Use when reviewing or writing C code in this project.

ALWAYS use this skill proactively for Consumer Affairs Django repositories (located in ../ca/ directory) when ANY of these occur - (1) After writing or modifying ANY Python code files in CA repos (2) After tests pass and before telling user work is complete (3) User mentions linting, formatting, ruff, code style, or code quality (4) After using the ca-django-tests skill successfully (5) Before preparing to commit code. This skill runs 'ca exec ruff format' and 'ca exec ruff check --fix' to ensure code quality. CRITICAL - Always run this automatically after code changes and before declaring work complete.

ALWAYS use this skill proactively for Consumer Affairs Django repositories (located in ../ca/ directory) when ANY of these occur - (1) User mentions coverage, codecov, test coverage, partial coverage, branch coverage, or uncovered lines/code (2) User asks to write tests, add tests, run tests, or fix test failures (3) User asks to implement features, fix bugs, or modify code in CA repos and tests are needed (4) User provides a file path containing 'test' or 'tests' in CA repos (5) After writing new code in CA repos that needs test coverage. This skill handles Django test execution using the 'ca magictest' command and ensures 100% code coverage for CI requirements.

cache-clear

cache-components

cache-health