Total 55,448 skills, Backend Development has 4389 skills
Showing 12 of 4389 skills
Expert-level Java development with Java 21+ features, Spring Boot, Maven/Gradle, and enterprise best practices
C++20 modules skill for modern C++ projects. Use when working with named modules, module partitions, header units, CMake MODULE_SOURCES, Clang -fmodules-ts, BMI caching issues, or migrating from headers to modules. Activates on queries about C++20 modules, import statements, module interface units, header units, or BMI files.
Use when generating or reviewing NetSuite SDF permission configurations such as customrole XML, script deployment permissions, permkey values, permlevel choices, run-as role design, and least-privilege access. Confirms exact ADMI_ / LIST_ / REGT_ / REPO_ / TRAN_ permission IDs, distinguishes standard permissions from customrecord_* script IDs, and validates permissions against bundled NetSuite reference data.
Multi-tenant organization and team management for Convex with @djpanda/convex-tenants and @djpanda/convex-authz. Use when (1) setting up or integrating multi-tenant SaaS with Convex, (2) working with organizations, teams, members, or invitations, (3) configuring authz permissions for tenants, (4) using TenantsProvider, OrganizationSwitcher, or related React components, or (5) the user mentions convex-tenants, @djpanda/convex-tenants, or multi-tenant Convex.
[Pragmatic DDD Architecture] Guide for creating DDD Repositories (Interfaces and Infrastructure). Use when creating repository contracts or implementing them using Drizzle ORM, Zod, and Postgres. Enforces completely typed transactions with Drizzle Transaction types (no 'unknown'), Result returns for Railway-oriented programming via neverthrow, and mapping pg node errors to domain errors. Fits our docker-compose / drizzle-kit standard testing workflow.
PostHog feature flags for Java applications
PostHog logs for Java
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.
Use when adding Auth0 login, logout, and callback handling to Java Servlet web applications - integrates com.auth0:mvc-auth-commons SDK for server-side Java apps using javax.servlet with session-based authentication. Triggers on AuthenticationController, AuthorizeUrl, Tokens, IdentityVerificationException, Java MVC auth.
Handle Venice API errors correctly. Covers the StandardError / DetailedError / ContentViolationError / X402InferencePaymentRequired body shapes, every meaningful status code (400, 401, 402, 403, 415, 422, 429, 500, 503, 504), the 402 PAYMENT-REQUIRED header used by x402 inference, 422 content-policy suggested_prompt retry pattern, 429 rate-limit headers, and an exponential-backoff retry strategy with idempotency.
Ensures proper Python dependency management, avoiding global `pip install` and adhering to project-specific tooling. Use this skill if any of the following are true: 1. Attempting to run `pip install {package_name}`. 2. Python packages or dependencies need to be added or modified. 3. Initiating a new Python project. 4. Creating a new notebook, even if just using BigQuery cells. 5. Generating Python code that includes `import` statements for third-party libraries. 6. Before executing Python scripts via the terminal to ensure the correct virtual environment is active.
Use these skills when you need to troubleshoot performance bottlenecks, analyze query execution plans, identify resource-heavy processes, and monitor system-level PromQL metrics.