convex-functions

Build Convex queries, mutations, actions, and HTTP endpoints with validation, error handling, and proper runtime considerations. Master Convex functions including queries, mutations, actions, and HTTP endpoints with proper validation, error handling, and runtime considerations. All examples in this skill comply with @convex-dev/eslint-plugin rules: See the Code Quality section in convex-best-practices for linting setup. Before implementing, do not assume; fetch the latest documentation: Queries are reactive, cached, and read-only: Mutations modify the database and are transactional: Actions can call external APIs but have no direct database access: HTTP actions handle webhooks and external requests: Use internal functions for sensitive operations: Schedule functions to run later: - Four function types for different use cases: queries (read-only, cached, reactive), mutations (transactional writes), actions (external API calls), and HTTP actions (webhooks and API endpoints) - All functions require explicit argument and return validators using Convex's v schema system, with ConvexError for user-facing error messages - Internal functions restrict sensitive operations to server-side calls only; actions access the database indirectly via runQuery and runMutation - Includes scheduling support for delayed function execution and comprehensive examples covering messaging, payments,...