Function onlyNonSubstantive

internal/ctx/ctx.go:300–311

onlyNonSubstantive reports whether kept carries no substantive conversation: only system-role notes (soft nudges) and empty assistant messages (no text, no tool calls - the stall shape the empty-reply nudge answers, appended right before that nudge). Vacuously true for an empty slice.

(kept []Message)

func newestToolIndex(history []Message) int {
	for i := len(history) - 1; i >= 0; i-- {
		if history[i].Role == RoleTool {
			return i
		}
	}
	return -1
}

// onlyNonSubstantive reports whether kept carries no substantive conversation:
// only system-role notes (soft nudges) and empty assistant messages (no text,
// no tool calls - the stall shape the empty-reply nudge answers, appended
// right before that nudge). TrimSpace matches tui.newestAssistantEmpty's
// definition of "empty", so a whitespace-only stall can't mask the recovery.
// Vacuously true for an empty slice.
func onlyNonSubstantive(kept []Message) bool {
	for _, m := range kept {