snowmerak

NestJS dependency injection system, providers, injection tokens, scoped providers, and advanced DI patterns.

Go error handling patterns, wrapping, sentinel errors, custom error types, and the errors package. Grounded in Effective Go, Go Code Review Comments, and production-proven idioms.

Correct usage of context.Context in Go: propagation, cancellation, timeouts, deadlines, values, and common anti-patterns.

Drizzle ORM query builder including SELECT, INSERT, UPDATE, DELETE, joins, subqueries, and aggregation patterns.