session

type PromptAttribution struct {
	// CheckpointNumber is which checkpoint this was recorded before (1-indexed)
	CheckpointNumber int `json:"checkpoint_number"`

	// UserLinesAdded is lines added by user since the last checkpoint
	UserLinesAdded int `json:"user_lines_added"`

	// UserLinesRemoved is lines removed by user since the last checkpoint
	UserLinesRemoved int `json:"user_lines_removed"`

	// AgentLinesAdded is total agent lines added so far (base → last checkpoint).
	// Always 0 for checkpoint 1 since there's no previous checkpoint to measure against.
	AgentLinesAdded int `json:"agent_lines_added"`

	// AgentLinesRemoved is total agent lines removed so far (base → last checkpoint).
	// Always 0 for checkpoint 1 since there's no previous checkpoint to measure against.
	AgentLinesRemoved int `json:"agent_lines_removed"`

	// UserAddedPerFile tracks per-file user additions for accurate modification tracking.
	// This enables distinguishing user self-modifications from agent modifications.
	// See docs/architecture/attribution.md for details.
	UserAddedPerFile map[string]int `json:"user_added_per_file,omitempty"`
}

type State struct {
	// SessionID is the unique session identifier
	SessionID string `json:"session_id"`

	// BaseCommit is the HEAD commit when the session started
	BaseCommit string `json:"base_commit"`

	// WorktreePath is the absolute path to the worktree root
	WorktreePath string `json:"worktree_path,omitempty"`

	// WorktreeID is the internal git worktree identifier (empty for main worktree)
	// Derived from .git/worktrees/<name>/, stable across git worktree move
	WorktreeID string `json:"worktree_id,omitempty"`

	// StartedAt is when the session was started
	StartedAt time.Time `json:"started_at"`

	// EndedAt is when the session was explicitly closed by the user.
	// nil means the session is still active or was not cleanly closed.
	EndedAt *time.Time `json:"ended_at,omitempty"`

	// CheckpointCount is the number of checkpoints created in this session
	CheckpointCount int `json:"checkpoint_count"`

	// CondensedTranscriptLines tracks lines already included in previous condensation
	CondensedTranscriptLines int `json:"condensed_transcript_lines,omitempty"`

	// UntrackedFilesAtStart tracks files that existed at session start (to preserve during rewind)
	UntrackedFilesAtStart []string `json:"untracked_files_at_start,omitempty"`

	// FilesTouched tracks files modified/created/deleted during this session
	FilesTouched []string `json:"files_touched,omitempty"`

	// LastCheckpointID is the checkpoint ID from last condensation, reused for subsequent commits without new content
	LastCheckpointID id.CheckpointID `json:"last_checkpoint_id,omitempty"`

	// AgentType identifies the agent that created this session (e.g., "Claude Code", "Gemini CLI", "Cursor")
	AgentType agent.AgentType `json:"agent_type,omitempty"`

	// Token usage tracking (accumulated across all checkpoints in this session)
	TokenUsage *agent.TokenUsage `json:"token_usage,omitempty"`

	// Transcript position when session started (for multi-session checkpoints)
	TranscriptLinesAtStart      int    `json:"transcript_lines_at_start,omitempty"`
	TranscriptIdentifierAtStart string `json:"transcript_identifier_at_start,omitempty"`

	// TranscriptPath is the path to the live transcript file (for mid-session commit detection)
	TranscriptPath string `json:"transcript_path,omitempty"`

	// PromptAttributions tracks user and agent line changes at each prompt start.
	// This enables accurate attribution by capturing user edits between checkpoints.
	PromptAttributions []PromptAttribution `json:"prompt_attributions,omitempty"`

	// PendingPromptAttribution holds attribution calculated at prompt start (before agent runs).
	// This is moved to PromptAttributions when SaveChanges is called.
	PendingPromptAttribution *PromptAttribution `json:"pending_prompt_attribution,omitempty"`
}

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