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golang-context

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Idiomatic context.Context usage in Golang — propagation through API boundaries, cancellation, timeouts and deadlines, request-scoped values, context.WithoutCancel for background work outliving requests. Apply when designing context propagation across layers, debugging leaked or unexpired contexts, choosing between context.Background/TODO/WithoutCancel, or storing values in context. Not for code that merely accepts ctx as first parameter.

When to use

• designing context propagation across layers
• debugging leaked or unexpired contexts
• choosing between context.Background/TODO/WithoutCancel
• storing values in context
• cancellation, timeouts and deadlines
• request-scoped values
• context.WithoutCancel for background work

When not to use

• code that merely accepts ctx as first parameter

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