Struct SlidingWindow

internal/compact/slidingwindow.go:12–14

SlidingWindow keeps the last KeepLast messages and drops everything older. It snaps to a safe boundary so it never separates a tool_use from its tool_result.

// It snaps to a safe boundary so it never separates a tool_use from its
// tool_result.
type SlidingWindow struct {
	KeepLast int
}

func (s *SlidingWindow) Compact(_ context.Context, messages []api.Message) ([]api.Message, error) {
	if len(messages) <= s.KeepLast {