// Package requestid provides a shared context key for request IDs,
// allowing both client and server packages to access request IDs
// without circular imports.
package requestid

import "context"

type key struct{}

// NewContext returns a context with the given request ID.
func NewContext(ctx context.Context, id string) context.Context {
	return context.WithValue(ctx, key{}, id)
}

// FromContext returns the request ID from ctx, or empty string if not set.
func FromContext(ctx context.Context) string {
	id, _ := ctx.Value(key{}).(string)
	return id
}