Go Toolkit

Implement Go error handling patterns including error wrapping, sentinel errors, custom error types, and error handling conventions. Use when handling errors, creating error types, or implementing error propagation. Trigger words include "error", "panic", "recover", "error handling", "error wrapping".

Implement Go concurrency patterns using goroutines, channels, and synchronization primitives. Use when building concurrent systems, implementing parallelism, or managing goroutine lifecycles. Trigger words include "goroutine", "channel", "concurrent", "parallel", "sync", "context".