checkpoint

type AgentStateSnapshot struct {
	// Iteration tracking
	Iteration   int `json:"iteration"`
	TotalTokens int `json:"total_tokens"`

	// Conversation state (from legacy ReasoningStateSnapshot)
	History     []*agent.Event `json:"history,omitempty"`
	LastEvent   *agent.Event   `json:"last_event,omitempty"`
	CurrentTurn []*agent.Event `json:"current_turn,omitempty"` // Messages in current turn

	// Response accumulation
	AccumulatedResponse string `json:"accumulated_response,omitempty"`
	FinalResponseAdded  bool   `json:"final_response_added"` // Response complete flag

	// Tool execution tracking
	PendingToolCalls        []*ToolCallSnapshot `json:"pending_tool_calls,omitempty"`
	FirstIterationToolCalls []*ToolCallSnapshot `json:"first_iteration_tool_calls,omitempty"` // For agentic loop

	// Multi-agent context (from legacy SubAgents field)
	SubAgents   []string `json:"sub_agents,omitempty"`   // Available sub-agents (for transfer)
	ParentAgent string   `json:"parent_agent,omitempty"` // Who invoked this agent
	Branch      string   `json:"branch,omitempty"`       // Agent branch path (e.g., "root.coordinator.researcher")

	// Workflow state (for sequential/parallel/loop agents)
	WorkflowType      string `json:"workflow_type,omitempty"`       // "sequential", "parallel", "loop"
	WorkflowStage     int    `json:"workflow_stage,omitempty"`      // Current stage index in sequential
	LoopIteration     int    `json:"loop_iteration,omitempty"`      // Current loop iteration
	LoopMaxIterations int    `json:"loop_max_iterations,omitempty"` // Max loop iterations

	// Agent-specific state (for custom agents)
	Custom map[string]any `json:"custom,omitempty"`
}

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

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

type CheckpointStats struct {
	Total         int
	Working       int
	InputRequired int
	Expired       int
	OldestAge     time.Duration
	AverageAge    time.Duration
}

type Config struct {
	// Enabled enables checkpointing.
	// Default: false
	Enabled *bool `yaml:"enabled,omitempty"`

	// Strategy determines when checkpoints are created.
	// Values: "event", "interval", "hybrid"
	// Default: "event"
	Strategy Strategy `yaml:"strategy,omitempty"`

	// Interval specifies checkpoint frequency (every N iterations).
	// Only used when Strategy is "interval" or "hybrid".
	// Default: 0 (disabled)
	Interval int `yaml:"interval,omitempty"`

	// AfterTools checkpoints after tool executions complete.
	// Default: false
	AfterTools *bool `yaml:"after_tools,omitempty"`

	// BeforeLLM checkpoints before LLM API calls.
	// Default: false
	BeforeLLM *bool `yaml:"before_llm,omitempty"`

	// Recovery configures checkpoint recovery behavior.
	Recovery *RecoveryConfig `yaml:"recovery,omitempty"`
}

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

type PendingToolCall struct {
	ID               string         `json:"id"`
	Name             string         `json:"name"`
	Description      string         `json:"description,omitempty"`
	Arguments        map[string]any `json:"arguments,omitempty"`
	RequiresApproval bool           `json:"requires_approval"`
}

type Phase string

type RecoveryConfig struct {
	// AutoResume enables automatic recovery on startup.
	// Default: false
	AutoResume *bool `yaml:"auto_resume,omitempty"`

	// AutoResumeHITL enables automatic recovery for INPUT_REQUIRED tasks.
	// When false, INPUT_REQUIRED tasks wait for explicit user action.
	// Default: false
	AutoResumeHITL *bool `yaml:"auto_resume_hitl,omitempty"`

	// Timeout is the maximum age (in seconds) for a checkpoint to be recoverable.
	// Checkpoints older than this are considered expired and marked as FAILED.
	// Default: 3600 (1 hour)
	Timeout int `yaml:"timeout,omitempty"`
}

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

type ResumeCallback func(ctx context.Context, state *State) error

type State struct {
	// Core identifiers
	TaskID    string `json:"task_id"`
	SessionID string `json:"session_id"`
	UserID    string `json:"user_id"`
	AppName   string `json:"app_name"`

	// Original user input
	Query string `json:"query"`

	// Agent state snapshot
	AgentName      string              `json:"agent_name"`
	AgentState     *AgentStateSnapshot `json:"agent_state,omitempty"`
	InvocationID   string              `json:"invocation_id"`
	LastEventIndex int                 `json:"last_event_index"` // Index of last processed event

	// Pending tool call (for HITL approval)
	PendingToolCall *PendingToolCall `json:"pending_tool_call,omitempty"`

	// Checkpoint metadata
	Phase          Phase     `json:"phase"`
	CheckpointType Type      `json:"checkpoint_type"`
	CheckpointTime time.Time `json:"checkpoint_time"`

	// Error information (if Phase == PhaseError)
	Error string `json:"error,omitempty"`
}

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

type Strategy string

type ToolCallSnapshot struct {
	ID        string         `json:"id"`
	Name      string         `json:"name"`
	Arguments map[string]any `json:"arguments,omitempty"`
	Result    any            `json:"result,omitempty"`
	Error     string         `json:"error,omitempty"`
	Completed bool           `json:"completed"`
}

type Type string