Strategy that produced this compaction.
Token count of the raw messages before compaction.
Token count of the produced summary.
Compression ratio (inputTokens / outputTokens).
The summary text that replaced the raw messages.
Content fragments intentionally dropped (low importance).
Named entities preserved in the summary.
Memory trace IDs created from this compaction.
Optional observationObservation notes extracted during compaction (hybrid strategy).
Optional emotionalEmotional context at time of compaction.
Duration of the compaction operation in ms.
Inclusive turn range that was compacted.