Function modelsFromContext

core/http/middleware/usage.go:244–254

modelsFromContext returns (requested, served) using context-set values when present, falling back to the response-reported model for both. The router middleware (subsystem 2 of the routing plan) populates these; until it lands they are equal.

(c echo.Context, fallback string)

// The router middleware (subsystem 2 of the routing plan) populates
// these; until it lands they are equal.
func modelsFromContext(c echo.Context, fallback string) (string, string) {
	requested := fallback
	served := fallback
	if v, ok := c.Get(ContextKeyRequestedModel).(string); ok && v != "" {
		requested = v
	}
	if v, ok := c.Get(ContextKeyServedModel).(string); ok && v != "" {
		served = v
	}
	return requested, served
}

func promptTokensFromContext(c echo.Context, fallback int64) (int64, int64) {
	pre := fallback