A custom rate limiter that respects server-provided rate limit headers (e.g., X-Rate-Limit-Reset). It synchronizes the client-side throttle window with the server's window, preventing unnecessary 429 responses. It implements System.Threading.RateLimiting abstractions and supports multiple limit rules (e.g., max requests per time period). This component is self-contained, has no dependencies on Sidekick-specific types beyond the common models, and could be extracted as a reusable NuGet package for any HttpClient that needs server-synchronized rate limiting.

A pure static class that computes the probability of rolling specific socket colors on an item given the item's attribute requirements and desired colors. It uses a combinatorial algorithm that accounts for Vorici-like socket coloring mechanics. The component has zero dependencies (no imports from the codebase other than standard .NET types) and is a self-contained calculation engine. It could be extracted verbatim into any other project requiring socket color probability computation.

A minimal, generic debouncer class that delays invoking an action until a specified timeout has elapsed since the last call. It uses CancellationTokenSource for safe cancellation and is thread-safe. The implementation is clean, has no Sidekick-specific dependencies, and would be directly reusable in any .NET application needing debounced input or event handling.