@rbxts/types

As someone working on roblox-ts projects, @rbxts/types is basically non-negotiable - it's the core type definitions for the entire Roblox API. The typings are impressively accurate and comprehensive, covering the vast majority of Roblox's API surface. Auto-completion works beautifully in VSCode, making it easy to discover Instance properties, service methods, and engine classes without constantly referencing the Roblox wiki.

The learning curve is minimal if you already know Roblox's Lua API - the types map directly to what you'd expect. Error messages from TypeScript are generally helpful, catching common mistakes like incorrect property names or type mismatches before runtime. Updates are frequent and track Roblox's weekly releases reasonably well, though occasionally there's a lag of a few days.

The main friction comes from the fact that Roblox's API wasn't designed with TypeScript in mind, so some patterns feel awkward (like WaitForChild's return types). Documentation is sparse within the package itself - you'll still rely heavily on the official Roblox docs and the roblox-ts Discord for help with TypeScript-specific quirks.

Using @rbxts/types daily in production Roblox projects, it's indispensable for type-safe development in the roblox-ts ecosystem. The typings cover the vast majority of Roblox's API surface with strong accuracy, catching common mistakes at compile time rather than runtime. Input validation becomes significantly safer when you have proper types for Instance hierarchies, DataStore operations, and RemoteEvent payloads.

From a security perspective, the package itself is purely type definitions with no runtime code, eliminating entire classes of supply chain risk. However, the types don't enforce security patterns - you still need to manually validate RemoteEvent inputs and sanitize user-generated content. The type system can give false confidence if you assume server-client boundaries are enforced at compile time.

The main friction point is API drift: Roblox updates its platform frequently, and there's sometimes a lag before typings catch up. You'll occasionally encounter newly released APIs that aren't typed yet, forcing temporary 'any' casts. The auto-generation process helps, but handwritten portions can have subtle inconsistencies with actual runtime behavior.

This package is the de facto standard for TypeScript type definitions in the Roblox ecosystem. It provides comprehensive coverage of the Roblox API surface, including DataModel instances, engine services, and Luau-specific types. The type definitions are generally accurate and align well with the actual runtime behavior, which is critical when you're trying to catch errors at compile time rather than after deployment to production.

In day-to-day usage, the package integrates seamlessly with roblox-ts tooling and provides solid IntelliSense support. The autocomplete experience is excellent, making it easy to discover API methods without constant documentation lookups. Error messages are generally helpful when you misuse APIs, though occasionally the generated types can produce cryptic errors for complex instance hierarchies.

The main operational concern is keeping pace with Roblox's frequent API updates. New engine features or breaking changes can lag behind by days or weeks, forcing you to either wait or temporarily use type assertions. Version updates are frequent (hence the high version number), which is both good for staying current but requires active dependency management.