Function switchProvider

main.go:309–317

switchProvider replaces the root agent's provider mid-session and re-registers subagents so they use the new one. Conversation history is kept — it's translated by the new provider on the next Send. Token totals reset because each provider keeps its own accumulator.

(name, model string)

// kept — it's translated by the new provider on the next Send. Token totals
// reset because each provider keeps its own accumulator.
func switchProvider(name, model string) error {
	p, err := newProviderByName(name, model, activeSysPrompt)
	if err != nil {
		return err
	}
	rootAgent.Provider = p
	registerSubagents(p)
	return nil
}

// ProviderKind returns the short name of a provider value. Used by /model
// and /provider to display the active backend.