Backend & APIs

Build a collaborative text editor backend with Yjs CRDTs and Rivet Actors: per-document actors relay sync and awareness updates and persist snapshots.

微信支付商品券接入解决方案，覆盖券类型选型、发券/核销/查询/退券/回调全链路，提供选型/示例代码/业务速查/质量评估/排障五大能力。Use when user mentions "商品券", "发券", "核销", "创建商品券", "商品券代码", "商品券回调", "商品券退券", or asks to "接入商品券", "生成发券代码", "排查商品券问题".

Guidelines for implementing NextAuth.js (Auth.js v5) authentication in Next.js applications with session management and security best practices

Apply when choosing which VTEX IO authentication token should back a request from a backend app. Covers `ctx.authToken`, `ctx.storeUserAuthToken`, `ctx.adminUserAuthToken`, `authMethod`, and how requester context should…

Apply when deciding where and how a VTEX IO app should store and read data. Covers when to use app settings, configuration apps, Master Data, VBase, VTEX core APIs, or external stores, and how to avoid duplicating sourc…

Apply when designing or implementing the runtime structure of a VTEX IO backend app under node/. Covers the Service entrypoint, typed context and state, service.json runtime configuration, and how routes, events, and Gr…

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Load CSV, JSON, and NDJSON files into Elasticsearch indices using the bulk API and explicit mappings when field types matter. Use when batch-importing local files, converting CSV rows or JSON arrays to NDJSON bulk forma…

Add Stripe payments to a web app — Checkout Sessions, Payment Intents, subscriptions, webhooks, customer portal, and pricing pages. Covers the decision of which Stripe API to use, produces working integration code, and…

Deploy CCA (Continuous Clearing Auction) smart contracts using the Factory pattern. Use when user says "deploy auction", "deploy cca", "factory deployment", or wants to deploy a configured auction.

Binance Sub-account request using the Binance API. Authentication requires API key and secret key.

Apply when defining service.json routes, choosing public vs segment vs private URL prefixes for VTEX IO services, or setting HTTP cache headers that interact with the VTEX edge and CDN. Covers path patterns, cookie visi…

Use Fusion DevTools CLI (fdev) for API testing, token acquisition, service discovery, and person lookup during development. USE FOR: calling Fusion REST APIs, getting access tokens as JSON, discovering services and envi…

BFL FLUX API integration guide covering endpoints, async polling patterns, rate limiting, error handling, webhooks, and regional endpoints with Python and TypeScript code examples.

Frontend/Node integration with SAS backends using @sasjs/adapter - configuring the SASjs class, the exact request() inputs and response shape, authentication, file upload, and session management. Use when writing TypeSc…

Building full SASjs applications - project structure, sasjsconfig.json, services/jobs/macros folders, multi-target (SAS 9 / Viya / SASjs server) configuration, streaming frontends, mocks and tests. Use when creating or…

Installing, configuring, and running @sasjs/server - the open-source NodeJS wrapper around the SAS binary that provides a REST API, filesystem (SASjs Drive), Stored Program execution, and web app streaming. Covers deskt…

Apply when designing or modifying a BFF (Backend-for-Frontend) layer, middleware, or API proxy for a headless VTEX storefront. Covers BFF middleware architecture, public vs private API classification, VtexIdclientAutCoo…

Rust coding guidelines for the Windmill backend. MUST use when writing or modifying Rust code in the backend directory.

Configure Claude Code authentication for Cyrus — API key, OAuth token, or third-party provider.

Azure Cosmos DB performance optimization and best practices guidelines for NoSQL, partitioning, queries, and SDK usage. Use when writing, reviewing, or refactoring code that interacts with Azure Cosmos DB, designing dat…

Apply when implementing cart, checkout, or order placement logic proxied through a BFF for headless VTEX storefronts. Covers OrderForm lifecycle, cart creation, item management, profile/shipping/payment attachments, ord…

Serves LLMs with high throughput using vLLM's PagedAttention and continuous batching. Use when deploying production LLM APIs, optimizing inference latency/throughput, or serving models with limited GPU memory. Supports…

Catalyst AppSail — persistent backend PaaS with managed runtimes (Node.js, Java, Python) and custom Docker containers. Trigger on 'AppSail', 'persistent server', 'Docker on Catalyst', 'X_ZOHO_CATALYST_LISTEN_PORT', or '…

Apply when implementing idempotency logic in payment connector code or handling duplicate payment requests. Covers paymentId as idempotency key, payment state machine transitions, retry semantics for cancellation and re…

Catalyst serverless functions — all 7 types (Basic I/O, Advanced I/O, Event, Cron, Job, Integration, Browser Logic), handler signatures, catalyst-config.json, Security Rules, API Gateway routing, file uploads, busboy, E…

Apply when implementing caching logic, CDN configuration, or performance optimization for a headless VTEX storefront. Covers which VTEX APIs can be cached (Intelligent Search, Catalog) versus which must never be cached…

Appwrite Python SDK skill. Use when building server-side Python applications with Appwrite, including Django, Flask, and FastAPI integrations. Covers user management, database/table CRUD, file storage, and functions via…

Catalyst Data Store — relational cloud database with ZCQL, CRUD operations, table permissions, and result pagination. Requires MCP connection — check for CatalystbyZoho_* tools before any operation. Trigger on 'Data Sto…

Setup and utility scripts for muapi.ai — configure API keys, test connectivity, and poll for async generation results

Integrates Amazon Location Service APIs for AWS applications. Use this skill when users want to add maps (interactive MapLibre or static images); geocode addresses to coordinates or reverse geocode coordinates to addres…

Laravel database optimization patterns. Use when writing Eloquent queries, creating migrations, configuring caching, debugging slow queries, or optimizing database performance. Triggers on tasks involving N+1 queries, i…

Catalyst Authentication — user login/signup, ZAID, Web SDK auth flows, OAuth token management via Connections, third-party authentication (Okta, Auth0, Duo, custom IdP), social logins (Google, Facebook, LinkedIn, Micros…

Fetches Aave V3 public market data using the Grimoire venue CLI. Use when you need Aave health checks, chain listings, market metadata, or reserve info.

Retrieves Uniswap router metadata using the Grimoire venue CLI. Use when you need router addresses, adapter information, or Uniswap V3/V4 details.

Attach a DuckDB database file for use with /duckdb-skills:query. Explores the schema (tables, columns, row counts) and writes a SQL state file so subsequent queries can restore this session automatically via duckdb -ini…

Strapi v5 plugin development expert. Use for building, refactoring, or revamping plugins, custom APIs, admin panel extensions, Document Service API usage, content-type creation, and CMS architecture. Invoke when working…

Troubleshoot and debug LiveAvatar integration issues. Use when the user's LiveAvatar integration isn't working, the avatar is silent, audio is garbled, sessions fail to start, events aren't received, or they're getting…

Create, list, rotate, and revoke OmniRoute API keys. Control per-key scopes, spending limits, and expiration. Keys gate access to all proxy and management endpoints.

Apply when implementing asynchronous payment methods (Boleto, Pix, bank redirects) or working with callback URLs in payment connector code. Covers undefined status response, callbackUrl notification, X-VTEX-signature va…

Catalyst Cache — in-memory key-value store with TTL for ephemeral session and temporary data. Trigger on 'Cache', 'cache segment', 'cache key', 'TTL', 'segment.put', 'segment.get', or 'temporary data Catalyst'.

tRPC end-to-end type-safe APIs for TypeScript with React Query integration and full-stack type safety

Catalyst Stratus — object storage service with upload/download, signed URLs, and multipart upload support. Stratus uses its own SDK-based APIs (not S3-API-compatible). Migrate from AWS S3 or GCS using the Stratus Migrat…

Expert in secure backend coding practices specializing in input validation, authentication, and API security. Use PROACTIVELY for backend security implementations or security code reviews.

Catalyst NoSQL — key-value table store with typed items built via NoSQLItem builder. Partition key required. Trigger on 'NoSQL', 'nosql.table', 'insertItems', 'fetchItem', 'updateItems', 'deleteItems', 'queryTable', 'No…

Expert guidance for Quarkus framework development with Jakarta EE, MicroProfile, GraalVM native builds, and reactive programming patterns

Binance Vip-loan request using the Binance API. Authentication requires API key and secret key.

Use this when another step needs to call the admin.da.live API, for example before pushing HTML content, listing documents, or triggering a DA preview, and you do not already have a valid DA_TOKEN in scope from an earli…

LP, MILP, and QP (beta) with cuOpt — Python, C, and CLI. Use when the user is solving LP, MILP, or QP with any cuOpt interface.