Languages & Frameworks for Claude Code

Memory is the cornerstone of intelligent agents. Without it, every interaction starts from zero. This skill covers the architecture of agent memory: short-term (context window), long-term (vector stores), and the cognitive architectures that organize them. Key insight: Memory isn't just storage - it's retrieval. A million stored facts mean nothing if you can't find the right one. Chunking, embedding, and retrieval strategies determine whether your agent remembers or forgets. The field is fragm

Tools are how AI agents interact with the world. A well-designed tool is the difference between an agent that works and one that hallucinates, fails silently, or costs 10x more tokens than necessary. This skill covers tool design from schema to error handling. JSON Schema best practices, description writing that actually helps the LLM, validation, and the emerging MCP standard that's becoming the lingua franca for AI tools. Key insight: Tool descriptions are more important than tool implementa

Expert patterns for Algolia search implementation, indexing strategies, React InstantSearch, and relevance tuning Use when: adding search to, algolia, instantsearch, search api, search functionality.

Modern Angular (v20+) expert with deep knowledge of Signals, Standalone Components, Zoneless applications, SSR/Hydration, and reactive patterns.

Use when architecting enterprise Angular 15+ applications with complex state management, optimizing RxJS patterns, designing micro-frontend systems, or solving performance and scalability challenges in large codebases. Specifically:\n\n<example>\nContext: Large-scale Angular application with 200+ components experiencing performance degradation, memory leaks in RxJS observables, and difficult state management with Redux\nuser: \"Our Angular dashboard has grown to 200+ components, pages load slowl

This skill should be used when working with annotated data matrices in Python, particularly for single-cell genomics analysis, managing experimental measurements with metadata, or handling large-scale biological datasets. Use when tasks involve AnnData objects, h5ad files, single-cell RNA-seq data, or integration with scanpy/scverse tools.

Expert in integrating third-party APIs with proper authentication, error handling, rate limiting, and retry logic. Use when integrating REST APIs, GraphQL endpoints, webhooks, or external services. Specializes in OAuth flows, API key management, request/response transformation, and building robust API clients.

Expert API architect for designing and implementing REST and GraphQL APIs with production-grade resilience, security, and versioning. Use this agent when you need to: design a GraphQL schema with federation for a new microservice, build a resilient REST client with circuit breaker and bulkhead patterns, choose between REST/GraphQL/gRPC for a new service, or implement secure API authentication and rate limiting. <example> <user_request>Design a GraphQL API for an e-commerce catalog service with p

Use this agent when designing new APIs, creating API specifications, or refactoring existing API architecture for scalability and developer experience. Invoke when you need REST/GraphQL/gRPC endpoint design, OpenAPI 3.1 documentation, authentication patterns, API versioning strategies, or protocol selection for internal microservices. Use PROACTIVELY before backend implementation begins to establish the API contract. Specifically:\n\n<example>\nContext: A team is building a new microservice and

API design principles and decision-making. REST vs GraphQL vs tRPC selection, response formats, versioning, pagination.

Main application building orchestrator. Creates full-stack applications from natural language requests. Determines project type, selects tech stack, coordinates agents.

Architectural decision-making framework. Requirements analysis, trade-off evaluation, ADR documentation. Use when making architecture decisions or analyzing system design.

Software architecture modernization specialist. Use PROACTIVELY for monolith decomposition, microservices design, event-driven architecture, and scalability improvements.

Architecture Scenario Explorer

Arm Cloud Migration Assistant accelerates moving x86 workloads to Arm infrastructure. It scans the repository for architecture assumptions, portability issues, container base image and dependency incompatibilities, and recommends Arm-optimized changes. It can drive multi-arch container builds, validate performance, and guide optimization, enabling smooth cross-platform deployment directly inside GitHub.

Build content-focused websites with Astro — zero JS by default, islands architecture, multi-framework components, and Markdown/MDX support.

Comprehensive Python library for astronomy and astrophysics. This skill should be used when working with astronomical data including celestial coordinates, physical units, FITS files, cosmological calculations, time systems, tables, world coordinate systems (WCS), and astronomical data analysis. Use when tasks involve coordinate transformations, unit conversions, FITS file manipulation, cosmological distance calculations, time scale conversions, or astronomical data processing.

Optimal ViewModel and Wizard creation patterns for Avalonia using Zafiro and ReactiveUI.

Mandatory skills, conventions, and behavioral rules for Avalonia UI development using the Zafiro toolkit.

Specialized skill for building production-ready serverless applications on AWS. Covers Lambda functions, API Gateway, DynamoDB, SQS/SNS event-driven patterns, SAM/CDK deployment, and cold start optimization.

Expert patterns for Azure Functions development including isolated worker model, Durable Functions orchestration, cold start optimization, and production patterns. Covers .NET, Python, and Node.js programming models. Use when: azure function, azure functions, durable functions, azure serverless, function app.

Export existing Azure resources to Infrastructure as Code templates via Azure Resource Graph analysis, Azure Resource Manager API calls, and azure-iac-generator integration. Use this skill when the user asks to export, convert, migrate, or extract existing Azure resources to IaC templates (Bicep, ARM Templates, Terraform, Pulumi).

Central hub for generating Infrastructure as Code (Bicep, ARM, Terraform, Pulumi) with format-specific validation and best practices. Use this skill when the user asks to generate, create, write, or build infrastructure code, deployment code, or IaC templates in any format (Bicep, ARM Templates, Terraform, Pulumi).

Create, update, or review Azure IaC in Bicep using Azure Verified Modules (AVM).

Create, update, or review Azure IaC in Terraform using Azure Verified Modules (AVM).

Backend system architecture and API design specialist. Use PROACTIVELY for greenfield service design, monolith decomposition, API paradigm selection (REST/gRPC/GraphQL), microservice boundaries, database schemas, scalability planning, event-driven architecture, and observability design. This agent focuses on architecture and design decisions — for writing implementation code use the backend-developer agent instead.\n\n<example>\nContext: An existing Rails monolith is growing too large and needs

Expert backend architect specializing in scalable API design, microservices architecture, and distributed systems.

Use this agent when building server-side APIs, microservices, and backend systems that require robust architecture, scalability planning, and production-ready implementation. Specifically:\\n\\n<example>\\nContext: A project needs a new RESTful API service with database persistence, authentication, and caching for handling high-traffic requests.\\nuser: \"We need to build a user service API that handles 10k RPS with sub-100ms latency. It should support OAuth2 authentication, PostgreSQL for persi

Backend architecture patterns, API design, database optimization, and server-side best practices for Node.js, Express, and Next.js API routes.

Bash/Linux terminal patterns. Critical commands, piping, error handling, scripting. Use when working on macOS or Linux systems.

Act as an Azure Bicep Infrastructure as Code coding specialist that creates Bicep templates.

Primary Python toolkit for molecular biology. Preferred for Python-based PubMed/NCBI queries (Bio.Entrez), sequence manipulation, file parsing (FASTA, GenBank, FASTQ, PDB), advanced BLAST workflows, structures, phylogenetics. For quick BLAST, use gget. For direct REST API, use pubmed-database.

Primary Python tool for 40+ bioinformatics services. Preferred for multi-database workflows: UniProt, KEGG, ChEMBL, PubChem, Reactome, QuickGO. Unified API for queries, ID mapping, pathway analysis. For direct REST control, use individual database skills (uniprot-database, kegg-database).

Vision-language pre-training framework bridging frozen image encoders and LLMs. Use when you need image captioning, visual question answering, image-text retrieval, or multimodal chat with state-of-the-art zero-shot performance.

Use this agent when building smart contracts, DApps, and blockchain protocols that require expertise in Solidity, gas optimization, security auditing, and Web3 integration. Specifically:\n\n<example>\nContext: A team is building a DeFi protocol and needs to implement smart contracts for an AMM with liquidity pools, yield farming, and governance tokens.\nuser: \"We need to build an AMM protocol similar to Uniswap. Requirements: ERC20 token support, liquidity pool management, automated market make

Build production-ready Bright Data integrations with best practices baked in. Reference documentation for developers using coding assistants (Claude Code, Cursor, etc.) to implement web scraping, search, browser automation, and structured data extraction. Covers Web Unlocker API, SERP API, Web Scraper API, and Browser API (Scraping Browser).

Expert in building browser extensions that solve real problems - Chrome, Firefox, and cross-browser extensions. Covers extension architecture, manifest v3, content scripts, popup UIs, monetization strategies, and Chrome Web Store publishing. Use when: browser extension, chrome extension, firefox addon, extension, manifest v3.

BullMQ expert for Redis-backed job queues, background processing, and reliable async execution in Node.js/TypeScript applications. Use when: bullmq, bull queue, redis queue, background job, job queue.