Function getHistoryForLLM

extensions/cli/src/compaction.ts:222–238

(
  fullHistory: ChatHistoryItem[],
  compactionIndex: number | null,
)

}

export function getHistoryForLLM(
  fullHistory: ChatHistoryItem[],
  compactionIndex: number | null,
): ChatHistoryItem[] {
  if (compactionIndex === null || compactionIndex >= fullHistory.length) {
    return fullHistory;
  }

  // Include system message (if at index 0) and everything from compaction index forward
  const systemMessage =
    fullHistory[0]?.message?.role === "system" ? fullHistory[0] : null;
  const messagesFromCompaction = fullHistory.slice(compactionIndex);

  return systemMessage && compactionIndex > 0
    ? [systemMessage, ...messagesFromCompaction]
    : messagesFromCompaction;
}

/**
 * Parameters for auto-compaction check