Implement Go Concurrency Patterns

Go Concurrency Patterns covers production patterns for Go concurrency: goroutines, channels, synchronization primitives, and context management. It applies to six concrete scenarios: building concurrent Go applications, implementing worker pools and pipelines, managing goroutine lifecycles, using channels for communication, debugging race conditions, and implementing graceful shutdown. For detailed patterns and examples it points to a separate resources/implementation-playbook.md.

Use it when writing or debugging concurrent Go code - worker pools, pipelines, goroutine lifecycle management, channel-based communication, race-condition debugging, or graceful shutdown. It is scoped to Go's concurrency model specifically, not general Go application design or other languages' concurrency approaches.

Input is the specific concurrency scenario at hand (a worker pool to build, a race condition to debug, a shutdown sequence to implement). Output is a production-appropriate Go concurrency pattern, with deeper implementation detail available in the linked playbook.

Go developers building or debugging concurrent applications who need production-tested patterns for goroutines, channels, synchronization, and context management rather than ad hoc concurrency code.