Go Context

context.Context controls cancellation, deadlines, and request-scoped values across API boundaries. Misusing it causes goroutine leaks, orphaned work, and subtle production bugs.

Detailed reference material, loaded on demand:

• references/timeout-budgets.md — dividing a parent's remaining budget, reading ctx.Deadline().
• references/values.md — context key types, accessors, collision traps.
• references/http-and-testing.md — request context in handlers and middleware, and cancellation tests.

Read a reference file only when the section below is not enough.

1. Core Rules

Context is always the first parameter: