Convex Backend

This loads when you're writing Convex backend code and enforces their current function syntax with explicit args, returns, and handler properties. The key thing it hammers on is always using validators (even v.null() for void returns) and preferring withIndex() over filter() for queries. It covers the usual backend stuff like schemas, queries, mutations, and actions, plus some Convex-specific patterns around internal functions and the distinction between what can access ctx.db directly versus what needs runQuery. Mostly useful if you're already committed to Convex and want to avoid the common pitfalls around their TypeScript patterns and database access rules.