contextmgr

type Budgeter struct {
	Tokenizer Tokenizer
	// Budget is the soft token ceiling for the assembled context.
	Budget int
}

type Checkpoint struct {
	// Summary is the condensed narrative of what happened before the cut.
	Summary string
	// Tasks is the task tree, which must survive the boundary intact (T-063).
	Tasks TaskTree
	// Recent holds the messages retained verbatim across the cut.
	Recent []ports.Message
}

type Checkpointer struct {
	// Root is the directory holding checkpoint.md.
	Root string
	// Window is the model's context window in tokens. Zero means unknown, in
	// which case checkpointing never triggers automatically.
	Window int
	// HighWater is the fraction of Window that triggers a checkpoint. Zero uses
	// DefaultHighWater.
	HighWater float64
}

type Heuristic struct {
	CharsPerToken float64
}

type Input struct {
	// System is the system prompt. Never dropped — without it the agent loses
	// its identity and rules.
	System string
	// Task is the active task description (highest-priority working state).
	Task string
	// Progress is the active task's progress notes.
	Progress string
	// Checkpoint is the reconstructed checkpoint summary.
	Checkpoint string
	// Memory holds hybrid-retrieved memory chunks, most relevant first
	// (ADR-0003).
	Memory []string
	// Recent holds retained recent messages in chronological order.
	Recent []ports.Message
}

type Output struct {
	System     string
	Task       string
	Progress   string
	Checkpoint string
	Memory     []string
	Recent     []ports.Message

	// Used is the estimated token count of the retained content.
	Used int
	// Dropped counts the sections and items that did not fit.
	Dropped int
}

type Status int

type TaskNode struct {
	ID     string
	Title  string
	Status Status
}

type TaskTree struct {
	Nodes []TaskNode
}

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

type Tokenizer interface {
	Count(text string) int
}