context

type Budget struct {
	Tokens    int
	Window    int
	Threshold int
}

type ContextEngine struct {
	// contains filtered or unexported fields
}

type ContextSummary struct {
	Summary       string
	TokensBefore  int
	ReadFiles     []string
	ModifiedFiles []string
	Timestamp     time.Time
}

type ContextUsageEstimate struct {
	// Tokens is the total estimated context tokens (UsageTokens + TrailingTokens).
	Tokens int
	// UsageTokens is the token count derived from the last LLM-reported Usage.
	UsageTokens int
	// TrailingTokens is the chars/4 estimate for messages after the last Usage.
	TrailingTokens int
	// LastUsageIndex is the index of the last assistant message with Usage, or -1 if none.
	LastUsageIndex int
}

type EngineConfig struct {
	// ContextWindow is the model's maximum supported context window.
	ContextWindow int
	// ReserveTokens is the minimum prompt headroom to preserve. When zero, a
	// conservative default is used.
	ReserveTokens int
	// Strategies are applied in order until the projected view fits.
	Strategies []Strategy
	// OnProject is called when Project rewrites the prompt view.
	OnProject func(RewriteEvent)
	// OnRecover is called when RecoverOverflow rewrites the prompt view.
	OnRecover func(RewriteEvent)
}

type ForceCompactionStrategy interface {
	Strategy
	ForceApply(ctx context.Context, transcript []agentcore.AgentMessage, view []agentcore.AgentMessage, budget Budget) ([]agentcore.AgentMessage, StrategyResult, error)
}

type FullSummaryConfig struct {
	// Model performs the actual summary generation.
	Model agentcore.ChatModel
	// StripImages controls whether images are removed before summarization.
	// Nil defaults to true.
	StripImages *bool
	// KeepRecentTokens reserves a recent suffix to keep verbatim.
	KeepRecentTokens int
	// PostSummaryHooks inject lightweight reminder messages after the summary.
	PostSummaryHooks []PostSummaryHook
}

type FullSummaryStrategy struct {
	// contains filtered or unexported fields
}

type LightTrimConfig struct {
	KeepRecent    int
	TextThreshold int
	PreserveHead  int
	PreserveTail  int
}

type LightTrimStrategy struct {
	// contains filtered or unexported fields
}

type PostSummaryHook func(ctx context.Context, info SummaryInfo, kept []agentcore.AgentMessage) ([]agentcore.AgentMessage, error)

type RewriteEvent struct {
	Reason       string
	Strategy     string
	Changed      bool
	TokensBefore int
	TokensAfter  int
	Info         *SummaryInfo
}

type Strategy interface {
	Name() string
	Apply(ctx context.Context, transcript []agentcore.AgentMessage, view []agentcore.AgentMessage, budget Budget) ([]agentcore.AgentMessage, StrategyResult, error)
}

type StrategyResult struct {
	Applied     bool
	TokensSaved int
	Name        string
	Info        *SummaryInfo
}

type SummaryInfo struct {
	TokensBefore   int
	TokensAfter    int
	MessagesBefore int
	MessagesAfter  int
	CompactedCount int // number of messages summarized
	KeptCount      int // number of messages retained verbatim
	IsSplitTurn    bool
	IsIncremental  bool          // updated an existing summary
	SummaryLen     int           // summary length in runes
	Duration       time.Duration // wall time including LLM calls
	ReadFiles      []string      // files read during compacted conversation
	ModifiedFiles  []string      // files modified during compacted conversation
}

type ToolClassifier func(toolName string) bool

type ToolResultMicrocompactConfig struct {
	Classifier     ToolClassifier
	KeepRecent     int
	ClearedMessage string
	IdleThreshold  time.Duration
}

type ToolResultMicrocompactStrategy struct {
	// contains filtered or unexported fields
}