Microsoft.Agents.AI.Compaction Namespace

Classes

Name	Description
ChatReducerCompactionStrategy	A compaction strategy that delegates to an IChatReducer to reduce the conversation's included messages.
ChatStrategyExtensions	Provides extension methods for CompactionStrategy.
CompactionMessageGroup	Represents a logical group of ChatMessage instances that must be kept or removed together during compaction.
CompactionMessageIndex	A collection of CompactionMessageGroup instances and derived metrics based on a flat list of ChatMessage objects.
CompactionProvider	A AIContextProvider that applies a CompactionStrategy to compact the message list before each agent invocation.
CompactionStrategy	Base class for strategies that compact a CompactionMessageIndex to reduce context size.
CompactionTriggers	Factory to create CompactionTrigger predicates.
ContextWindowCompactionStrategy	A compaction strategy that derives token thresholds from a model's context window size and maximum output tokens, applying a two-phase compaction pipeline: Tool result eviction (ToolResultCompactionStrategy) — collapses old tool call groups into concise summaries when the token count exceeds the ToolEvictionThreshold. Truncation (TruncationCompactionStrategy) — removes the oldest non-system message groups when the token count exceeds the TruncationThreshold.
PipelineCompactionStrategy	A compaction strategy that executes a sequential pipeline of CompactionStrategy instances against the same CompactionMessageIndex.
SlidingWindowCompactionStrategy	A compaction strategy that removes the oldest user turns and their associated response groups to bound conversation length.
SummarizationCompactionStrategy	A compaction strategy that uses an LLM to summarize older portions of the conversation, replacing them with a single summary message that preserves key facts and context.
ToolResultCompactionStrategy	A compaction strategy that collapses old tool call groups into single concise assistant messages, removing the detailed tool results while preserving a record of which tools were called and what they returned.
TruncationCompactionStrategy	A compaction strategy that removes the oldest non-system message groups, keeping at least MinimumPreservedGroups most-recent groups intact.

Enums

Name	Description
CompactionGroupKind	Identifies the kind of a CompactionMessageGroup.

Delegates

Name	Description
CompactionTrigger	Defines a condition based on CompactionMessageIndex metrics used by a CompactionStrategy to determine when to trigger compaction and when the target compaction threshold has been met.