node

type ChangeKind int

type Diff struct {
	Format   Format
	FileA    string
	FileB    string
	Hunks    []Hunk    // populated for text diffs
	Root     *DiffNode // populated for structured diffs (phases 4–6)
	Added    int
	Removed  int
	Modified int // structured diffs only
}

type DiffNode struct {
	Kind     ChangeKind
	Path     string // e.g. ".users[0].name"
	Key      string
	Index    int    // -1 if not an array element
	OldValue string // raw leaf value
	NewValue string
	Children []*DiffNode
}

type Format int

type Hunk struct {
	OldStart int
	OldCount int
	NewStart int
	NewCount int
	Lines    []Line
}

type Line struct {
	Kind    ChangeKind
	OldNum  int    // 0 when Added
	NewNum  int    // 0 when Removed
	Content string // raw line content, no leading +/-
}