c7e61565c0
794 lines, 35+ patterns across 9 topics with hyperlinked sources. Includes frequency data from the source (281 interfaces, 55 sentinels, 262 constructors, 309 context-accepting functions, 2685 t.Helper calls). Topics: interfaces, errors, testing, packages, concurrency, documentation, naming, configuration, extension, performance, smells. All examples are real code from the Go source, not invented.