Method buildMessages

internal/tui/model.go:672–681

()

// per-turn root on m.turnCtx / m.cancel. Cancel-old-then-install-new keeps
// Ctrl+C consistent: one m.cancel() always unwinds the whole current cascade.
func (m *Model) installTurnContext() {
	if m.cancel != nil {
		m.cancel()
	}
	m.turnCtx, m.cancel = context.WithCancel(context.Background())
}

// beginTurn installs a fresh per-turn context, flips phase to thinking, and
// returns the chat stream-reader Cmd. Every path starting a new LLM round
// funnels through here so one m.cancel() cancels the whole cascade.
func (m *Model) beginTurn() tea.Cmd {
	m.installTurnContext()
	m.turnStart = time.Now()