Total 50,524 skills, Backend Development has 4135 skills
Showing 12 of 4135 skills
Advanced call control features including DTMF sending, SIPREC recording, noise suppression, client state, and supervisor controls. This skill provides JavaScript SDK examples.
Build voice applications using TeXML markup language (TwiML-compatible). Manage applications, calls, conferences, recordings, queues, and streams. This skill provides JavaScript SDK examples.
Integrate the TaxCloud v3 sales tax API into an ecommerce application. Use this skill whenever the user wants to calculate sales tax, record or convert orders for tax compliance, process refunds or returns, issue standalone tax credits, import orders from external systems (Square, POS, marketplaces, ERPs, QuickBooks), handle tax-exempt customers, classify products with TIC codes, generate a typed TypeScript client from the OpenAPI spec, troubleshoot zero-tax responses, or handle any aspect of US sales tax automation with TaxCloud. Trigger on mentions of TaxCloud, sales tax calculation, nexus, tax compliance, tax quotes, order upload, exemption certificates, TIC codes, or filing.
[Pragmatic DDD Architecture] Guide for creating PostgreSQL tables and defining relations using Drizzle ORM. Use when creating new schemas, managing PostgreSQL indexes, enums, mapping column names to camelCase for the domain, and explicitly exporting constraint names.
PostHog feature flags for Rust applications
PostHog integration for server-side Node.js applications using posthog-node
Use when writing server-side code with Supabase — Edge Functions, Hono apps, webhook handlers, or any backend that needs Supabase auth and client creation. Trigger whenever the user imports from `@supabase/server`, mentions `supabase/server`, Supabase Edge Functions, or needs server-side auth (JWT verification, API key validation, CORS handling) with Supabase. Also trigger when you see legacy patterns in existing code — `Deno.serve`, `createClient(Deno.env.get('SUPABASE_URL'))`, imports from `esm.sh/@supabase`, `deno.land/std` serve, or usage of `SUPABASE_ANON_KEY` / `SUPABASE_SERVICE_ROLE_KEY` — these indicate code that should be migrated to this package.
Set up database migrations for Elixir releases. Use when asked to configure release migrations, add migrate command to releases, or set up Ecto for production deployment without Mix.
This skill should be used when the user works on any .ex or .exs file, mentions Elixir/Phoenix/Ecto/OTP, the project has a mix.exs, or asks "which skill should I use", "new to Elixir", "help with Elixir". Routes to the correct thinking skill BEFORE exploring code. Triggers on "implement", "add", "fix", "refactor" in Elixir projects.
Use when creating a new Phoenix project, adding Phoenix to an umbrella, configuring assets with Bun, setting up devenv.nix for a Phoenix project, configuring Ecto with PostgreSQL Unix sockets, or adding end-to-end tests.
Use these skills when you need to discover and manage PostgreSQL extensions or fine-tune engine-level settings such as memory allocation and server configuration parameters.
Review Kafka Connect connector configurations for common misconfigurations using the Lenses MCP server. Checks error handling, DLQ setup, converters, transforms, task count and task health. Use when user says "review connectors", "check connector configs", "why is my connector failing" or asks about Kafka Connect configuration. Do NOT use for creating, deploying or controlling connectors.