Function turnsToTrim

apps/kimi-code/src/tui/utils/transcript-window.ts:92–109

(
  turns: readonly TranscriptTurn[],
  maxTurns: number,
  hysteresis: number,
)

 * turn is never removed (it is the active / just-finished turn).
 */
export function turnsToTrim(
  turns: readonly TranscriptTurn[],
  maxTurns: number,
  hysteresis: number,
): Set<TranscriptEntry> {
  const toRemove = new Set<TranscriptEntry>();

  if (turns.length <= maxTurns + hysteresis) return toRemove;

  let remaining = turns.length;
  // `turns.length - 1` keeps the most recent turn off-limits.
  for (let i = 0; i < turns.length - 1 && remaining > maxTurns; i++) {
    const turn = turns[i]!;
    for (const entry of turn.entries) toRemove.add(entry);
    remaining--;
  }
  return toRemove;
}