Backend and APIs: skills, plugins, subagents, slash commands and mcp servers

email-and-password-best-practices better-auth skill Configures email verification, password reset flows, and password policies in Better Auth. Helpful when adding credential authentication to your backend. Claude Code CX Codex Cursor +1 46,600installs labarchive-integration K-Dense-AI skill This skill guides work with LabArchives ELN API and Inventory API v1, including regional endpoints, request signing, and local request planning. Claude Code CX Codex Cursor +1 1,900installs adaptyv K-Dense-AI skill Helps design protein characterization assays in Adaptyv Bio Foundry, check catalog targets, estimate run budgets, and collect test results. Claude Code CX Codex Cursor +1 1,900installs benchling-integration K-Dense-AI skill Automates Benchling laboratory data workflows using Python SDK 1.25.0 and REST API v2. Useful for managing registry entities, sample inventory, and ELN entries. Claude Code CX Codex Cursor +1 1,900installs modal K-Dense-AI skill Guides Python workloads on Modal, from web endpoints to GPU model training. Use it when deploying cloud jobs through the Modal SDK. Claude Code CX Codex Cursor +1 1,900installs sql-pro VoltAgent Community subagent Subagent for optimizing complex SQL queries, designing database schemas, and fixing performance bottlenecks across PostgreSQL, MySQL, SQL Server, and Oracle. Claude Code 3,602installs sharp-edges trailofbits skill Audits API designs and configuration schemas for developer footguns. Flags dangerous defaults and fragile interfaces where the easiest path causes security vulnerabilities. Claude Code CX Codex Cursor +1 6,900installs zod-4 prowler-cloud skill Provides validation patterns for Zod 4 and guides migration from Zod 3. It helps write schemas for forms, API payloads, and adapters. Claude Code CX Codex Cursor +1 1,200installs legacy-modernizer https://github.com/Jeffallan skill Plans incremental legacy-code migration from dependency maps to facades, flags, and rollback steps. Use it when splitting a monolith or upgrading technology without a wholesale replacement. Claude Code CX Codex Cursor +1 4,300installs salesforce-developer https://github.com/Jeffallan skill Writes Apex classes, builds Lightning Web Components, optimizes SOQL queries, and sets up batch processing on Salesforce. Enforces governor limits and bulkifies code. Claude Code CX Codex Cursor +1 4,300installs firebase sickn33 skill Guides Firebase architecture, Firestore security rules, and Cloud Functions based on read-heavy query patterns and pricing limits. Claude Code CX Codex Cursor +1 1,600installs gateway-workers cloudflare skill Skill for building, debugging, and reviewing Cloudflare Workers triggered by Forward actions in Gateway HTTP policies. Work with GatewayMiddleware, context types, and request continuation. Claude Code CX Codex Cursor +1 7,700installs workflow Vercel Inc. skill Builds durable, resumable tasks with the Vercel Workflow SDK when operations must survive server restarts or pause for external events. Claude Code CX Codex Cursor +1 5,300installs mcp-developer https://github.com/Jeffallan skill A skill for building and debugging MCP servers and clients in TypeScript or Python, with tool schemas, transport setup and protocol checks in the inspector. Claude Code CX Codex Cursor +1 4,200installs django-expert https://github.com/Jeffallan skill Guides Django 5.0 and DRF development by enforcing indexed models, ORM query optimization with select_related, and JWT authentication. Claude Code CX Codex Cursor +1 4,200installs graphql-architect https://github.com/Jeffallan skill Designs schema-first GraphQL APIs, Apollo Federation 2.5+ subgraphs, and DataLoader resolvers to eliminate N+1 queries. Claude Code CX Codex Cursor +1 4,000installs ads-server-side-tracking AgriciDaniel skill Audits server-side paid-media measurement: verifies event parameters between browser and server, checks deduplication, data hashing, and privacy compliance. Spots conversion loss and bugs in sGTM, Meta CAPI, TikTok Events API. Claude Code CX Codex Cursor +1 3,300installs workflow-automation sickn33 skill Teaches durable execution for multi-step jobs: when a step dies mid-flow, the workflow picks up where it stopped instead of replaying from the start. Claude Code CX Codex Cursor +1 1,500installs AgentDB Performance Optimization ruvnet skill Skill for vector database optimization in AgentDB: reduce memory 4–32x via quantization, speed up search 150x via HNSW indexing, add caching and batch inserts. Claude Code CX Codex Cursor +1 1,100installs V3 Core Implementation ruvnet skill Builds the claude-flow v3 core in TypeScript and hands each domain to the core-implementer subagent. Claude Code CX Codex Cursor +1 1,100installs AgentDB Vector Search ruvnet skill A skill for fast semantic document retrieval using AgentDB's vector database. Use it for RAG systems, search engines, and knowledge bases where you need relevant results from large text collections. Claude Code CX Codex Cursor +1 1,100installs flow-nexus-platform ruvnet skill Manages Flow Nexus accounts, sandboxes and application deployment from an AI agent. Use it when those platform operations belong in an agent workflow. Claude Code CX Codex Cursor +1 1,100installs V3 DDD Architecture ruvnet skill Splits the claude-flow v3 orchestrator into five bounded contexts and wires them back together through a microkernel and a domain event bus. Claude Code CX Codex Cursor +1 1,100installs hive-mind-advanced ruvnet skill Multi-agent coordination system with a queen coordinator, consensus mechanisms, and shared memory. Enables complex projects where tasks are distributed across specialized workers. Claude Code CX Codex Cursor +1 1,100installs organization-best-practices better-auth skill Sets up multi-tenant organizations, invitations, and permissions in Better Auth. Helps manage teams and custom RBAC rules without digging through documentation. Claude Code CX Codex Cursor +1 36,400installs backend-developer VoltAgent Community subagent Subagent for building backend APIs and microservices in Node.js, Python, and Go. Helps implement relational schemas, caching, and OWASP security rules. Claude Code 2,724installs arize-ai-provider-integration official arize skill Manage Arize AI integrations for language model providers: create connections, inspect their settings, and update or remove them. Use it when configuring models for Arize evaluators or other Arize features. GitHub Copilot 1,100installs two-factor-authentication-best-practices better-auth skill Walks an agent through adding two-factor auth to a Better Auth app: TOTP, codes by email or SMS, backup codes, trusted devices. Claude Code CX Codex Cursor +1 34,200installs architect-review sickn33 skill Turns the agent into an architecture reviewer: it weighs design decisions, names the risks and tradeoffs, and asks for a validation plan. Claude Code CX Codex Cursor +1 1,300installs langgraph sickn33 skill A skill for building production-grade agents with deliberate structure. Design graph topology, manage state, add cycles and branches, persist progress via checkpoints, and loop humans back into decisions. Claude Code CX Codex Cursor +1 1,300installs laravel-best-practices laravel skill Indexes Laravel backend conventions for models, migrations, queues, and queries. It enforces existing codebase patterns before introducing new abstractions. Claude Code CX Codex Cursor +1 2,100installs wp-plugin-development WordPress skill This skill guides WordPress plugin work, from project structure and hooks to admin settings, security checks and release packaging. Claude Code CX Codex Cursor +1 7,900installs firecrawl-build-scrape firecrawl skill This skill guides integration of Firecrawl /scrape into product code for single-page extraction. It applies when an app has a known URL and needs markdown, HTML, or metadata. Claude Code CX Codex Cursor +1 61,600installs dart-resolve-package-conflicts dart-lang skill Skill for resolving Dart package version conflicts when pub get fails. Teaches how to audit dependencies, update packages within constraints, and surgically remove entries from the lockfile. Claude Code CX Codex Cursor +1 18,600installs firecrawl-build-onboarding firecrawl skill Skill fetches Firecrawl credentials and sets up the SDK in your project via built-in browser authentication. Use when your app needs FIRECRAWL_API_KEY or you're adding Firecrawl to .env. Claude Code CX Codex Cursor +1 61,200installs onboard-context-matic official github skill Interactive tour of the context-matic MCP server. It detects project languages, catalogs supported APIs, and demonstrates live model and endpoint lookups. GitHub Copilot 1,000installs blockchain-developer sickn33 skill This skill guides smart contract, Web3 application, and decentralized-system work. Use it for design, reviews, and transaction checks before any on-chain action. Claude Code CX Codex Cursor +1 1,200installs production-code-audit sickn33 skill Skill for systematic code review covering security flaws, logic errors and performance issues before deployment. Identifies specific problems, proposes fixes and validates them. Claude Code CX Codex Cursor +1 1,200installs hermes-tweet Xquik skill Connects X/Twitter research and gated posting tools to Hermes Agent workflows. Claude Code CX Codex Cursor 2,600installs nitro Anthony Fu skill A skill with Nitro v3 references: file-based routing, route rules, caching, storage and deployment presets. Use it when the agent edits nitro.config or writes H3 handlers. Claude Code CX Codex Cursor +1 2,600installs