JavaScript

Work with Effect v4 / effect-smol TypeScript code in this repo

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.

Modern JavaScript/TypeScript development with Bun runtime. Covers package management, bundling, testing, and migration from Node.js. Use when working with Bun, optimizing JS/TS development speed, or migrating from Node.js to Bun.

Comprehensive code review skill for TypeScript, JavaScript, Python, Swift, Kotlin, Go. Includes automated code analysis, best practice checking, security scanning, and review checklist generation. Use when reviewing pull requests, providing code feedback, identifying issues, or ensuring code quality standards.

Expert patterns for HubSpot CRM integration including OAuth authentication, CRM objects, associations, batch operations, webhooks, and custom objects. Covers Node.js and Python SDKs. Use when: hubspot, hubspot api, hubspot crm, hubspot integration, contacts api.

Comprehensive JavaScript reference covering 33+ essential concepts every developer should know. From fundamentals like primitives and closures to advanced patterns like async/await and functional programming. Use when explaining JS concepts, debugging JavaScript issues, or teaching JavaScript fundamentals.

Master modern JavaScript with ES6+, async patterns, and Node.js APIs. Handles promises, event loops, and browser/Node compatibility.

Comprehensive guide for implementing robust testing strategies in JavaScript/TypeScript applications using modern testing frameworks and best practices.

Node.js development principles and decision-making. Framework selection, async patterns, security, and architecture. Teaches thinking, not copying.

Converts OpenAPI 3.0 JSON/YAML to TypeScript interfaces and type guards. This skill should be used when the user asks to generate types from OpenAPI, convert schema to TS, create API interfaces, or generate TypeScript types from an API specification.

This skill should be used when the user asks to "create a Telegram bot", "build a Telegram chatbot", "set up a Telegram webhook", "add inline keyboards to a bot", "handle Telegram callback queries", "implement Telegram payments", "send media via Telegram bot", "configure Telegram bot commands", "deploy a Telegram bot", or mentions the Telegram Bot API, telegram bot tokens, getUpdates, setWebhook, or bot frameworks like node-telegram-bot-api, grammy, python-telegram-bot, or aiogram. Provides comprehensive guidance for building production-ready Telegram bots with Node.js and Python.

Master TypeScript with advanced types, generics, and strict type safety. Handles complex type systems, decorators, and enterprise-grade patterns.

Specialized skill for building production-ready Discord bots. Covers Discord.js (JavaScript) and Pycord (Python), gateway intents, slash commands, interactive components, rate limiting, and sharding.

Build Slack apps using the Bolt framework across Python, JavaScript, and Java. Covers Block Kit for rich UIs, interactive components, slash commands, event handling, OAuth installation flows, and Workflow Builder integration. Focus on best practices for production-ready Slack apps. Use when: slack bot, slack app, bolt framework, block kit, slash command.

Cloud laboratory platform for automated protein testing and validation. Use when designing proteins and needing experimental validation including binding assays, expression testing, thermostability measurements, enzyme activity assays, or protein sequence optimization. Also use for submitting experiments via API, tracking experiment status, downloading results, optimizing protein sequences for better expression using computational tools (NetSolP, SoluProt, SolubleMPNN, ESM), or managing protein design workflows with wet-lab validation.

Perform language and framework specific security best-practice reviews and suggest improvements. Trigger only when the user explicitly requests security best practices guidance, a security review/report, or secure-by-default coding help. Trigger only for supported languages (python, javascript/typescript, go). Do not trigger for general code review, debugging, or non-security tasks.

Complete production-ready guide for Motion Canvas with ESM/CommonJS workarounds, full setup templates, and troubleshooting for programmatic video creation using TypeScript

Expert in Drizzle ORM for TypeScript — schema design, relational queries, migrations, and serverless database integration. Use when building type-safe database layers with Drizzle.

Build ultra-fast web APIs and full-stack apps with Hono — runs on Cloudflare Workers, Deno, Bun, Node.js, and any WinterCG-compatible runtime.

Create Zustand stores following established patterns with proper TypeScript types and middleware.

Write JavaScript code in n8n Code nodes. Use when writing JavaScript in n8n, using $input/$json/$node syntax, making HTTP requests with $helpers, working with dates using DateTime, troubleshooting Code node errors, or choosing between Code node modes.

Node.js development principles and decision-making. Framework selection, async patterns, security, and architecture. Teaches thinking, not copying.

Detects timing side-channel vulnerabilities in cryptographic code. Use when implementing or reviewing crypto code, encountering division on secrets, secret-dependent branches, or constant-time programming questions in C, C++, Go, Rust, Swift, Java, Kotlin, C#, PHP, JavaScript, TypeScript, Python, or Ruby.

Effect-TS service and agent patterns for this repo. Use when implementing or modifying services in packages/mcp-server, adding agents, or following Effect.Service, Layer, and error-handling conventions.

Effect-TS patterns for Building Apis. Use when working with building apis in Effect-TS applications.

Effect-TS patterns for Building Data Pipelines. Use when working with building data pipelines in Effect-TS applications.

Effect-TS patterns for Concurrency Getting Started. Use when working with concurrency getting started in Effect-TS applications.

Effect-TS patterns for Concurrency. Use when working with concurrency in Effect-TS applications.

Effect-TS patterns for Core Concepts. Use when working with core concepts in Effect-TS applications.

Effect-TS patterns for Domain Modeling. Use when working with domain modeling in Effect-TS applications.

Effect-TS patterns for Error Handling Resilience. Use when working with error handling resilience in Effect-TS applications.

Effect-TS patterns for Error Handling. Use when working with error handling in Effect-TS applications.

Effect-TS patterns for Error Management. Use when working with error management in Effect-TS applications.

Effect-TS patterns for Getting Started. Use when working with getting started in Effect-TS applications.

Effect-TS patterns for Making Http Requests. Use when working with making http requests in Effect-TS applications.

Effect-TS patterns for Observability. Use when working with observability in Effect-TS applications.

Effect-TS patterns for Platform Getting Started. Use when working with platform getting started in Effect-TS applications.

Effect-TS patterns for Platform. Use when working with platform in Effect-TS applications.

Effect-TS patterns for Project Setup Execution. Use when working with project setup execution in Effect-TS applications.

Effect-TS patterns for Resource Management. Use when working with resource management in Effect-TS applications.

Effect-TS patterns for Scheduling Periodic Tasks. Use when working with scheduling periodic tasks in Effect-TS applications.

Effect-TS patterns for Scheduling. Use when working with scheduling in Effect-TS applications.

Effect-TS patterns for Streams Getting Started. Use when working with streams getting started in Effect-TS applications.

Effect-TS patterns for Streams Sinks. Use when working with streams sinks in Effect-TS applications.

Effect-TS patterns for Streams. Use when working with streams in Effect-TS applications.

Effect-TS patterns for Testing. Use when working with testing in Effect-TS applications.

Effect-TS patterns for Tooling And Debugging. Use when working with tooling and debugging in Effect-TS applications.

Effect-TS patterns for Value Handling. Use when working with value handling in Effect-TS applications.

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Build edge-first TypeScript applications on Cloudflare Workers. Covers Workers API, Hono framework, KV/D1/R2 storage, Durable Objects, Queues, and testing patterns. Use when creating serverless workers, edge functions, or Cloudflare-deployed services.

DHH-style code review. Reviews Ruby, Rails, and JavaScript code for convention violations, framework contamination, and unnecessary complexity.

Use when creating or refactoring Stimulus controllers. Applies Hotwire conventions, controller design patterns, targets/values usage, action handling, and JavaScript best practices.

Generate an app icon from a single 1024² master and fan out to iOS (AppIcon.appiconset with squircle-ready 1024 opaque), Android (adaptive foreground + background + Android 13 monochrome), PWA (192/512 + 512 maskable with 80% safe zone), and visionOS (3-layer parallax).

Diagnose and repair asset-generation failures. Maps tier-0/1/2 validation codes (checkerboard, missing alpha, safe-zone violation, palette drift, garbled wordmark, low contrast) to concrete repair primitives (matte, inpaint, route change, seed sweep, composite). Applies a retry budget so Claude does not loop on hopeless regenerations.

Maintain visual coherence across a multi-asset brand set (logo + app icon + favicon + illustrations). Builds BrandBundle (palette, typography, style refs, do-not list), enforces palette per model (Recraft `controls.colors`, Midjourney `--sref`, IP-Adapter, LoRA), validates style similarity with CSD and palette ΔE2000, and promotes accepted assets into the reference set so each new generation tightens the lock.

Generate an in-product illustration (empty state, onboarding, hero, spot art) that obeys a brand bundle. Uses IP-Adapter / LoRA / Recraft style_id / Flux.2 brand refs for consistency across a set; validates palette ΔE2000 and style adherence.