Error Handling in Go: Stop Panicking, Start Wrapping

Short summary

Go treats errors as values, making them explicit in function signatures and preventing silent failures. Learn four patterns for wrapping errors effectively: plain return for bubbling, fmt.Errorf with %w for context, sentinel errors with errors.Is for specific checks, and custom structs with errors.As for rich error data. Reserve panic() only for unrecoverable situations.

• •Error wrapping adds context without losing original error information
• •Use fmt.Errorf("%w"), errors.Is(), and errors.As() to create actionable error chains
• •Treat error handling as design decisions, not boilerplate

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