fix: replace O(n²) duplicate detection with map-based O(1) lookups

Replace linear scan deduplication of snapshot IDs in RemoveAllSnapshots() and PruneBlobs() with map[string]bool for O(1) lookups. Previously, each new snapshot ID was checked against the entire collected slice via a linear scan, resulting in O(n²) overall complexity. Now a 'seen' map provides constant-time membership checks while preserving insertion order in the slice. closes #12
2026-03-19 06:05:44 -07:00
22 changed files with 136 additions and 564 deletions
--- a/ARCHITECTURE.md
+++ b/ARCHITECTURE.md
@@ -54,7 +54,7 @@ The database tracks five primary entities and their relationships:

 #### File (`database.File`)
 Represents a file or directory in the backup system. Stores metadata needed for restoration:
- Path, mtime
+- Path, timestamps (mtime, ctime)
 - Size, mode, ownership (uid, gid)
 - Symlink target (if applicable)

--- a/README.md
+++ b/README.md
@@ -150,7 +150,7 @@ passphrase is needed or stored locally.
 vaultik [--config <path>] snapshot create [snapshot-names...] [--cron] [--daemon] [--prune]
 vaultik [--config <path>] snapshot list [--json]
 vaultik [--config <path>] snapshot verify <snapshot-id> [--deep]
-vaultik [--config <path>] snapshot purge [--keep-latest | --older-than <duration>] [--name <name>] [--force]
+vaultik [--config <path>] snapshot purge [--keep-latest | --older-than <duration>] [--force]
 vaultik [--config <path>] snapshot remove <snapshot-id> [--dry-run] [--force]
 vaultik [--config <path>] snapshot prune
 vaultik [--config <path>] restore <snapshot-id> <target-dir> [paths...]
@@ -180,9 +180,8 @@ vaultik [--config <path>] store info
 * `--deep`: Download and verify blob contents (not just existence)

 **snapshot purge**: Remove old snapshots based on criteria
-* `--keep-latest`: Keep the most recent snapshot per snapshot name
+* `--keep-latest`: Keep only the most recent snapshot
 * `--older-than`: Remove snapshots older than duration (e.g., 30d, 6mo, 1y)
-* `--name`: Filter purge to a specific snapshot name
 * `--force`: Skip confirmation prompt

 **snapshot remove**: Remove a specific snapshot
--- a/docs/DATAMODEL.md
+++ b/docs/DATAMODEL.md
@@ -17,6 +17,7 @@ Stores metadata about files in the filesystem being backed up.
 - `id` (TEXT PRIMARY KEY) - UUID for the file record
 - `path` (TEXT NOT NULL UNIQUE) - Absolute file path
 - `mtime` (INTEGER NOT NULL) - Modification time as Unix timestamp
+- `ctime` (INTEGER NOT NULL) - Change time as Unix timestamp  
 - `size` (INTEGER NOT NULL) - File size in bytes
 - `mode` (INTEGER NOT NULL) - Unix file permissions and type
 - `uid` (INTEGER NOT NULL) - User ID of file owner
--- a/internal/cli/purge.go
+++ b/internal/cli/purge.go
@@ -11,9 +11,16 @@ import (
 	"go.uber.org/fx"
 )

+// PurgeOptions contains options for the purge command
+type PurgeOptions struct {
+	KeepLatest bool
+	OlderThan  string
+	Force      bool
+}
+
 // NewPurgeCommand creates the purge command
 func NewPurgeCommand() *cobra.Command {
-	opts := &vaultik.SnapshotPurgeOptions{}
+	opts := &PurgeOptions{}

 	cmd := &cobra.Command{
 		Use:   "purge",
@@ -21,15 +28,8 @@ func NewPurgeCommand() *cobra.Command {
 		Long: `Removes snapshots based on age or count criteria.

 This command allows you to:
- Keep only the latest snapshot per name (--keep-latest)
+- Keep only the latest snapshot (--keep-latest)
 - Remove snapshots older than a specific duration (--older-than)
- Filter to a specific snapshot name (--name)
-
-When --keep-latest is used, retention is applied per snapshot name. For example,
-if you have snapshots named "home" and "system", --keep-latest keeps the most
-recent of each.
-
-Use --name to restrict the purge to a single snapshot name.

 Config is located at /etc/vaultik/config.yml by default, but can be overridden by 
 specifying a path using --config or by setting VAULTIK_CONFIG to a path.`,
@@ -66,7 +66,7 @@ specifying a path using --config or by setting VAULTIK_CONFIG to a path.`,
 								// Start the purge operation in a goroutine
 								go func() {
 									// Run the purge operation
-									if err := v.PurgeSnapshotsWithOptions(opts); err != nil {
+									if err := v.PurgeSnapshots(opts.KeepLatest, opts.OlderThan, opts.Force); err != nil {
 										if err != context.Canceled {
 											log.Error("Purge operation failed", "error", err)
 											os.Exit(1)
@@ -92,10 +92,9 @@ specifying a path using --config or by setting VAULTIK_CONFIG to a path.`,
 		},
 	}

-	cmd.Flags().BoolVar(&opts.KeepLatest, "keep-latest", false, "Keep only the latest snapshot per name")
+	cmd.Flags().BoolVar(&opts.KeepLatest, "keep-latest", false, "Keep only the latest snapshot")
 	cmd.Flags().StringVar(&opts.OlderThan, "older-than", "", "Remove snapshots older than duration (e.g. 30d, 6m, 1y)")
 	cmd.Flags().BoolVar(&opts.Force, "force", false, "Skip confirmation prompts")
-	cmd.Flags().StringVar(&opts.Name, "name", "", "Filter purge to a specific snapshot name")

 	return cmd
 }
--- a/internal/cli/snapshot.go
+++ b/internal/cli/snapshot.go
@@ -167,25 +167,21 @@ func newSnapshotListCommand() *cobra.Command {

 // newSnapshotPurgeCommand creates the 'snapshot purge' subcommand
 func newSnapshotPurgeCommand() *cobra.Command {
-	opts := &vaultik.SnapshotPurgeOptions{}
+	var keepLatest bool
+	var olderThan string
+	var force bool

 	cmd := &cobra.Command{
 		Use:   "purge",
 		Short: "Purge old snapshots",
-		Long: `Removes snapshots based on age or count criteria.
-
-When --keep-latest is used, retention is applied per snapshot name. For example,
-if you have snapshots named "home" and "system", --keep-latest keeps the most
-recent of each.
-
-Use --name to restrict the purge to a single snapshot name.`,
-		Args: cobra.NoArgs,
+		Long:  "Removes snapshots based on age or count criteria",
+		Args:  cobra.NoArgs,
 		RunE: func(cmd *cobra.Command, args []string) error {
 			// Validate flags
-			if !opts.KeepLatest && opts.OlderThan == "" {
+			if !keepLatest && olderThan == "" {
 				return fmt.Errorf("must specify either --keep-latest or --older-than")
 			}
-			if opts.KeepLatest && opts.OlderThan != "" {
+			if keepLatest && olderThan != "" {
 				return fmt.Errorf("cannot specify both --keep-latest and --older-than")
 			}

@@ -209,7 +205,7 @@ Use --name to restrict the purge to a single snapshot name.`,
 						lc.Append(fx.Hook{
 							OnStart: func(ctx context.Context) error {
 								go func() {
-									if err := v.PurgeSnapshotsWithOptions(opts); err != nil {
+									if err := v.PurgeSnapshots(keepLatest, olderThan, force); err != nil {
 										if err != context.Canceled {
 											log.Error("Failed to purge snapshots", "error", err)
 											os.Exit(1)
@@ -232,10 +228,9 @@ Use --name to restrict the purge to a single snapshot name.`,
 		},
 	}

-	cmd.Flags().BoolVar(&opts.KeepLatest, "keep-latest", false, "Keep only the latest snapshot per name")
-	cmd.Flags().StringVar(&opts.OlderThan, "older-than", "", "Remove snapshots older than duration (e.g., 30d, 6m, 1y)")
-	cmd.Flags().BoolVar(&opts.Force, "force", false, "Skip confirmation prompt")
-	cmd.Flags().StringVar(&opts.Name, "name", "", "Filter purge to a specific snapshot name")
+	cmd.Flags().BoolVar(&keepLatest, "keep-latest", false, "Keep only the latest snapshot")
+	cmd.Flags().StringVar(&olderThan, "older-than", "", "Remove snapshots older than duration (e.g., 30d, 6m, 1y)")
+	cmd.Flags().BoolVar(&force, "force", false, "Skip confirmation prompt")

 	return cmd
 }
--- a/internal/database/cascade_debug_test.go
+++ b/internal/database/cascade_debug_test.go
@@ -29,6 +29,7 @@ func TestCascadeDeleteDebug(t *testing.T) {
 	file := &File{
 		Path:  "/cascade-test.txt",
 		MTime: time.Now().Truncate(time.Second),
+		CTime: time.Now().Truncate(time.Second),
 		Size:  1024,
 		Mode:  0644,
 		UID:   1000,
--- a/internal/database/chunk_files_test.go
+++ b/internal/database/chunk_files_test.go
@@ -22,6 +22,7 @@ func TestChunkFileRepository(t *testing.T) {
 	file1 := &File{
 		Path:       "/file1.txt",
 		MTime:      testTime,
+		CTime:      testTime,
 		Size:       1024,
 		Mode:       0644,
 		UID:        1000,
@@ -36,6 +37,7 @@ func TestChunkFileRepository(t *testing.T) {
 	file2 := &File{
 		Path:       "/file2.txt",
 		MTime:      testTime,
+		CTime:      testTime,
 		Size:       1024,
 		Mode:       0644,
 		UID:        1000,
@@ -136,9 +138,9 @@ func TestChunkFileRepositoryComplexDeduplication(t *testing.T) {

 	// Create test files
 	testTime := time.Now().Truncate(time.Second)
-	file1 := &File{Path: "/file1.txt", MTime: testTime, Size: 3072, Mode: 0644, UID: 1000, GID: 1000}
-	file2 := &File{Path: "/file2.txt", MTime: testTime, Size: 3072, Mode: 0644, UID: 1000, GID: 1000}
-	file3 := &File{Path: "/file3.txt", MTime: testTime, Size: 2048, Mode: 0644, UID: 1000, GID: 1000}
+	file1 := &File{Path: "/file1.txt", MTime: testTime, CTime: testTime, Size: 3072, Mode: 0644, UID: 1000, GID: 1000}
+	file2 := &File{Path: "/file2.txt", MTime: testTime, CTime: testTime, Size: 3072, Mode: 0644, UID: 1000, GID: 1000}
+	file3 := &File{Path: "/file3.txt", MTime: testTime, CTime: testTime, Size: 2048, Mode: 0644, UID: 1000, GID: 1000}

 	if err := fileRepo.Create(ctx, nil, file1); err != nil {
 		t.Fatalf("failed to create file1: %v", err)
--- a/internal/database/file_chunks_test.go
+++ b/internal/database/file_chunks_test.go
@@ -22,6 +22,7 @@ func TestFileChunkRepository(t *testing.T) {
 	file := &File{
 		Path:       "/test/file.txt",
 		MTime:      testTime,
+		CTime:      testTime,
 		Size:       3072,
 		Mode:       0644,
 		UID:        1000,
@@ -134,6 +135,7 @@ func TestFileChunkRepositoryMultipleFiles(t *testing.T) {
 		file := &File{
 			Path:       types.FilePath(path),
 			MTime:      testTime,
+			CTime:      testTime,
 			Size:       2048,
 			Mode:       0644,
 			UID:        1000,
--- a/internal/database/files.go
+++ b/internal/database/files.go
@@ -25,11 +25,12 @@ func (r *FileRepository) Create(ctx context.Context, tx *sql.Tx, file *File) err
 	}

 	query := `
-		INSERT INTO files (id, path, source_path, mtime, size, mode, uid, gid, link_target)
-		VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)
+		INSERT INTO files (id, path, source_path, mtime, ctime, size, mode, uid, gid, link_target)
+		VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
 		ON CONFLICT(path) DO UPDATE SET
 			source_path = excluded.source_path,
 			mtime = excluded.mtime,
+			ctime = excluded.ctime,
 			size = excluded.size,
 			mode = excluded.mode,
 			uid = excluded.uid,
@@ -41,10 +42,10 @@ func (r *FileRepository) Create(ctx context.Context, tx *sql.Tx, file *File) err
 	var idStr string
 	var err error
 	if tx != nil {
-		LogSQL("Execute", query, file.ID.String(), file.Path.String(), file.SourcePath.String(), file.MTime.Unix(), file.Size, file.Mode, file.UID, file.GID, file.LinkTarget.String())
-		err = tx.QueryRowContext(ctx, query, file.ID.String(), file.Path.String(), file.SourcePath.String(), file.MTime.Unix(), file.Size, file.Mode, file.UID, file.GID, file.LinkTarget.String()).Scan(&idStr)
+		LogSQL("Execute", query, file.ID.String(), file.Path.String(), file.SourcePath.String(), file.MTime.Unix(), file.CTime.Unix(), file.Size, file.Mode, file.UID, file.GID, file.LinkTarget.String())
+		err = tx.QueryRowContext(ctx, query, file.ID.String(), file.Path.String(), file.SourcePath.String(), file.MTime.Unix(), file.CTime.Unix(), file.Size, file.Mode, file.UID, file.GID, file.LinkTarget.String()).Scan(&idStr)
 	} else {
-		err = r.db.QueryRowWithLog(ctx, query, file.ID.String(), file.Path.String(), file.SourcePath.String(), file.MTime.Unix(), file.Size, file.Mode, file.UID, file.GID, file.LinkTarget.String()).Scan(&idStr)
+		err = r.db.QueryRowWithLog(ctx, query, file.ID.String(), file.Path.String(), file.SourcePath.String(), file.MTime.Unix(), file.CTime.Unix(), file.Size, file.Mode, file.UID, file.GID, file.LinkTarget.String()).Scan(&idStr)
 	}

 	if err != nil {
@@ -62,7 +63,7 @@ func (r *FileRepository) Create(ctx context.Context, tx *sql.Tx, file *File) err

 func (r *FileRepository) GetByPath(ctx context.Context, path string) (*File, error) {
 	query := `
-		SELECT id, path, source_path, mtime, size, mode, uid, gid, link_target
+		SELECT id, path, source_path, mtime, ctime, size, mode, uid, gid, link_target
 		FROM files
 		WHERE path = ?
 	`
@@ -81,7 +82,7 @@ func (r *FileRepository) GetByPath(ctx context.Context, path string) (*File, err
 // GetByID retrieves a file by its UUID
 func (r *FileRepository) GetByID(ctx context.Context, id types.FileID) (*File, error) {
 	query := `
-		SELECT id, path, source_path, mtime, size, mode, uid, gid, link_target
+		SELECT id, path, source_path, mtime, ctime, size, mode, uid, gid, link_target
 		FROM files
 		WHERE id = ?
 	`
@@ -99,7 +100,7 @@ func (r *FileRepository) GetByID(ctx context.Context, id types.FileID) (*File, e

 func (r *FileRepository) GetByPathTx(ctx context.Context, tx *sql.Tx, path string) (*File, error) {
 	query := `
-		SELECT id, path, source_path, mtime, size, mode, uid, gid, link_target
+		SELECT id, path, source_path, mtime, ctime, size, mode, uid, gid, link_target
 		FROM files
 		WHERE path = ?
 	`
@@ -122,7 +123,7 @@ func (r *FileRepository) GetByPathTx(ctx context.Context, tx *sql.Tx, path strin
 func (r *FileRepository) scanFile(row *sql.Row) (*File, error) {
 	var file File
 	var idStr, pathStr, sourcePathStr string
-	var mtimeUnix int64
+	var mtimeUnix, ctimeUnix int64
 	var linkTarget sql.NullString

 	err := row.Scan(
@@ -130,6 +131,7 @@ func (r *FileRepository) scanFile(row *sql.Row) (*File, error) {
 		&pathStr,
 		&sourcePathStr,
 		&mtimeUnix,
+		&ctimeUnix,
 		&file.Size,
 		&file.Mode,
 		&file.UID,
@@ -147,6 +149,7 @@ func (r *FileRepository) scanFile(row *sql.Row) (*File, error) {
 	file.Path = types.FilePath(pathStr)
 	file.SourcePath = types.SourcePath(sourcePathStr)
 	file.MTime = time.Unix(mtimeUnix, 0).UTC()
+	file.CTime = time.Unix(ctimeUnix, 0).UTC()
 	if linkTarget.Valid {
 		file.LinkTarget = types.FilePath(linkTarget.String)
 	}
@@ -158,7 +161,7 @@ func (r *FileRepository) scanFile(row *sql.Row) (*File, error) {
 func (r *FileRepository) scanFileRows(rows *sql.Rows) (*File, error) {
 	var file File
 	var idStr, pathStr, sourcePathStr string
-	var mtimeUnix int64
+	var mtimeUnix, ctimeUnix int64
 	var linkTarget sql.NullString

 	err := rows.Scan(
@@ -166,6 +169,7 @@ func (r *FileRepository) scanFileRows(rows *sql.Rows) (*File, error) {
 		&pathStr,
 		&sourcePathStr,
 		&mtimeUnix,
+		&ctimeUnix,
 		&file.Size,
 		&file.Mode,
 		&file.UID,
@@ -183,6 +187,7 @@ func (r *FileRepository) scanFileRows(rows *sql.Rows) (*File, error) {
 	file.Path = types.FilePath(pathStr)
 	file.SourcePath = types.SourcePath(sourcePathStr)
 	file.MTime = time.Unix(mtimeUnix, 0).UTC()
+	file.CTime = time.Unix(ctimeUnix, 0).UTC()
 	if linkTarget.Valid {
 		file.LinkTarget = types.FilePath(linkTarget.String)
 	}
@@ -192,7 +197,7 @@ func (r *FileRepository) scanFileRows(rows *sql.Rows) (*File, error) {

 func (r *FileRepository) ListModifiedSince(ctx context.Context, since time.Time) ([]*File, error) {
 	query := `
-		SELECT id, path, source_path, mtime, size, mode, uid, gid, link_target
+		SELECT id, path, source_path, mtime, ctime, size, mode, uid, gid, link_target
 		FROM files
 		WHERE mtime >= ?
 		ORDER BY path
@@ -253,7 +258,7 @@ func (r *FileRepository) DeleteByID(ctx context.Context, tx *sql.Tx, id types.Fi

 func (r *FileRepository) ListByPrefix(ctx context.Context, prefix string) ([]*File, error) {
 	query := `
-		SELECT id, path, source_path, mtime, size, mode, uid, gid, link_target
+		SELECT id, path, source_path, mtime, ctime, size, mode, uid, gid, link_target
 		FROM files
 		WHERE path LIKE ? || '%'
 		ORDER BY path
@@ -280,7 +285,7 @@ func (r *FileRepository) ListByPrefix(ctx context.Context, prefix string) ([]*Fi
 // ListAll returns all files in the database
 func (r *FileRepository) ListAll(ctx context.Context) ([]*File, error) {
 	query := `
-		SELECT id, path, source_path, mtime, size, mode, uid, gid, link_target
+		SELECT id, path, source_path, mtime, ctime, size, mode, uid, gid, link_target
 		FROM files
 		ORDER BY path
 	`
@@ -310,7 +315,7 @@ func (r *FileRepository) CreateBatch(ctx context.Context, tx *sql.Tx, files []*F
 		return nil
 	}

-	// Each File has 9 values, so batch at 100 to be safe with SQLite's variable limit
+	// Each File has 10 values, so batch at 100 to be safe with SQLite's variable limit
 	const batchSize = 100

 	for i := 0; i < len(files); i += batchSize {
@@ -320,18 +325,19 @@ func (r *FileRepository) CreateBatch(ctx context.Context, tx *sql.Tx, files []*F
 		}
 		batch := files[i:end]

-		query := `INSERT INTO files (id, path, source_path, mtime, size, mode, uid, gid, link_target) VALUES `
-		args := make([]interface{}, 0, len(batch)*9)
+		query := `INSERT INTO files (id, path, source_path, mtime, ctime, size, mode, uid, gid, link_target) VALUES `
+		args := make([]interface{}, 0, len(batch)*10)
 		for j, f := range batch {
 			if j > 0 {
 				query += ", "
 			}
-			query += "(?, ?, ?, ?, ?, ?, ?, ?, ?)"
-			args = append(args, f.ID.String(), f.Path.String(), f.SourcePath.String(), f.MTime.Unix(), f.Size, f.Mode, f.UID, f.GID, f.LinkTarget.String())
+			query += "(?, ?, ?, ?, ?, ?, ?, ?, ?, ?)"
+			args = append(args, f.ID.String(), f.Path.String(), f.SourcePath.String(), f.MTime.Unix(), f.CTime.Unix(), f.Size, f.Mode, f.UID, f.GID, f.LinkTarget.String())
 		}
 		query += ` ON CONFLICT(path) DO UPDATE SET
 			source_path = excluded.source_path,
 			mtime = excluded.mtime,
+			ctime = excluded.ctime,
 			size = excluded.size,
 			mode = excluded.mode,
 			uid = excluded.uid,
--- a/internal/database/files_test.go
+++ b/internal/database/files_test.go
@@ -39,6 +39,7 @@ func TestFileRepository(t *testing.T) {
 	file := &File{
 		Path:       "/test/file.txt",
 		MTime:      time.Now().Truncate(time.Second),
+		CTime:      time.Now().Truncate(time.Second),
 		Size:       1024,
 		Mode:       0644,
 		UID:        1000,
@@ -123,6 +124,7 @@ func TestFileRepositorySymlink(t *testing.T) {
 	symlink := &File{
 		Path:       "/test/link",
 		MTime:      time.Now().Truncate(time.Second),
+		CTime:      time.Now().Truncate(time.Second),
 		Size:       0,
 		Mode:       uint32(0777 | os.ModeSymlink),
 		UID:        1000,
@@ -159,6 +161,7 @@ func TestFileRepositoryTransaction(t *testing.T) {
 		file := &File{
 			Path:  "/test/tx_file.txt",
 			MTime: time.Now().Truncate(time.Second),
+			CTime: time.Now().Truncate(time.Second),
 			Size:  1024,
 			Mode:  0644,
 			UID:   1000,
--- a/internal/database/models.go
+++ b/internal/database/models.go
@@ -17,6 +17,7 @@ type File struct {
 	Path       types.FilePath   // Absolute path of the file
 	SourcePath types.SourcePath // The source directory this file came from (for restore path stripping)
 	MTime      time.Time
+	CTime      time.Time
 	Size       int64
 	Mode       uint32
 	UID        uint32
--- a/internal/database/repositories_test.go
+++ b/internal/database/repositories_test.go
@@ -23,6 +23,7 @@ func TestRepositoriesTransaction(t *testing.T) {
 		file := &File{
 			Path:  "/test/tx_file.txt",
 			MTime: time.Now().Truncate(time.Second),
+			CTime: time.Now().Truncate(time.Second),
 			Size:  1024,
 			Mode:  0644,
 			UID:   1000,
@@ -145,6 +146,7 @@ func TestRepositoriesTransactionRollback(t *testing.T) {
 		file := &File{
 			Path:  "/test/rollback_file.txt",
 			MTime: time.Now().Truncate(time.Second),
+			CTime: time.Now().Truncate(time.Second),
 			Size:  1024,
 			Mode:  0644,
 			UID:   1000,
@@ -200,6 +202,7 @@ func TestRepositoriesReadTransaction(t *testing.T) {
 	file := &File{
 		Path:  "/test/read_file.txt",
 		MTime: time.Now().Truncate(time.Second),
+		CTime: time.Now().Truncate(time.Second),
 		Size:  1024,
 		Mode:  0644,
 		UID:   1000,
@@ -223,6 +226,7 @@ func TestRepositoriesReadTransaction(t *testing.T) {
 		_ = repos.Files.Create(ctx, tx, &File{
 			Path:  "/test/should_fail.txt",
 			MTime: time.Now(),
+			CTime: time.Now(),
 			Size:  0,
 			Mode:  0644,
 			UID:   1000,
--- a/internal/database/repository_comprehensive_test.go
+++ b/internal/database/repository_comprehensive_test.go
@@ -23,6 +23,7 @@ func TestFileRepositoryUUIDGeneration(t *testing.T) {
 		{
 			Path:  "/file1.txt",
 			MTime: time.Now().Truncate(time.Second),
+			CTime: time.Now().Truncate(time.Second),
 			Size:  1024,
 			Mode:  0644,
 			UID:   1000,
@@ -31,6 +32,7 @@ func TestFileRepositoryUUIDGeneration(t *testing.T) {
 		{
 			Path:  "/file2.txt",
 			MTime: time.Now().Truncate(time.Second),
+			CTime: time.Now().Truncate(time.Second),
 			Size:  2048,
 			Mode:  0644,
 			UID:   1000,
@@ -70,6 +72,7 @@ func TestFileRepositoryGetByID(t *testing.T) {
 	file := &File{
 		Path:  "/test.txt",
 		MTime: time.Now().Truncate(time.Second),
+		CTime: time.Now().Truncate(time.Second),
 		Size:  1024,
 		Mode:  0644,
 		UID:   1000,
@@ -117,6 +120,7 @@ func TestOrphanedFileCleanup(t *testing.T) {
 	file1 := &File{
 		Path:  "/orphaned.txt",
 		MTime: time.Now().Truncate(time.Second),
+		CTime: time.Now().Truncate(time.Second),
 		Size:  1024,
 		Mode:  0644,
 		UID:   1000,
@@ -125,6 +129,7 @@ func TestOrphanedFileCleanup(t *testing.T) {
 	file2 := &File{
 		Path:  "/referenced.txt",
 		MTime: time.Now().Truncate(time.Second),
+		CTime: time.Now().Truncate(time.Second),
 		Size:  2048,
 		Mode:  0644,
 		UID:   1000,
@@ -213,6 +218,7 @@ func TestOrphanedChunkCleanup(t *testing.T) {
 	file := &File{
 		Path:  "/test.txt",
 		MTime: time.Now().Truncate(time.Second),
+		CTime: time.Now().Truncate(time.Second),
 		Size:  1024,
 		Mode:  0644,
 		UID:   1000,
@@ -342,6 +348,7 @@ func TestFileChunkRepositoryWithUUIDs(t *testing.T) {
 	file := &File{
 		Path:  "/test.txt",
 		MTime: time.Now().Truncate(time.Second),
+		CTime: time.Now().Truncate(time.Second),
 		Size:  3072,
 		Mode:  0644,
 		UID:   1000,
@@ -412,6 +419,7 @@ func TestChunkFileRepositoryWithUUIDs(t *testing.T) {
 	file1 := &File{
 		Path:  "/file1.txt",
 		MTime: time.Now().Truncate(time.Second),
+		CTime: time.Now().Truncate(time.Second),
 		Size:  1024,
 		Mode:  0644,
 		UID:   1000,
@@ -420,6 +428,7 @@ func TestChunkFileRepositoryWithUUIDs(t *testing.T) {
 	file2 := &File{
 		Path:  "/file2.txt",
 		MTime: time.Now().Truncate(time.Second),
+		CTime: time.Now().Truncate(time.Second),
 		Size:  1024,
 		Mode:  0644,
 		UID:   1000,
@@ -577,6 +586,7 @@ func TestComplexOrphanedDataScenario(t *testing.T) {
 		files[i] = &File{
 			Path:  types.FilePath(fmt.Sprintf("/file%d.txt", i)),
 			MTime: time.Now().Truncate(time.Second),
+			CTime: time.Now().Truncate(time.Second),
 			Size:  1024,
 			Mode:  0644,
 			UID:   1000,
@@ -668,6 +678,7 @@ func TestCascadeDelete(t *testing.T) {
 	file := &File{
 		Path:  "/cascade-test.txt",
 		MTime: time.Now().Truncate(time.Second),
+		CTime: time.Now().Truncate(time.Second),
 		Size:  1024,
 		Mode:  0644,
 		UID:   1000,
@@ -739,6 +750,7 @@ func TestTransactionIsolation(t *testing.T) {
 		file := &File{
 			Path:  "/tx-test.txt",
 			MTime: time.Now().Truncate(time.Second),
+			CTime: time.Now().Truncate(time.Second),
 			Size:  1024,
 			Mode:  0644,
 			UID:   1000,
@@ -800,6 +812,7 @@ func TestConcurrentOrphanedCleanup(t *testing.T) {
 		file := &File{
 			Path:  types.FilePath(fmt.Sprintf("/concurrent-%d.txt", i)),
 			MTime: time.Now().Truncate(time.Second),
+			CTime: time.Now().Truncate(time.Second),
 			Size:  1024,
 			Mode:  0644,
 			UID:   1000,
--- a/internal/database/repository_debug_test.go
+++ b/internal/database/repository_debug_test.go
@@ -18,6 +18,7 @@ func TestOrphanedFileCleanupDebug(t *testing.T) {
 	file1 := &File{
 		Path:  "/orphaned.txt",
 		MTime: time.Now().Truncate(time.Second),
+		CTime: time.Now().Truncate(time.Second),
 		Size:  1024,
 		Mode:  0644,
 		UID:   1000,
@@ -26,6 +27,7 @@ func TestOrphanedFileCleanupDebug(t *testing.T) {
 	file2 := &File{
 		Path:  "/referenced.txt",
 		MTime: time.Now().Truncate(time.Second),
+		CTime: time.Now().Truncate(time.Second),
 		Size:  2048,
 		Mode:  0644,
 		UID:   1000,
--- a/internal/database/repository_edge_cases_test.go
+++ b/internal/database/repository_edge_cases_test.go
@@ -29,6 +29,7 @@ func TestFileRepositoryEdgeCases(t *testing.T) {
 			file: &File{
 				Path:  "",
 				MTime: time.Now(),
+				CTime: time.Now(),
 				Size:  1024,
 				Mode:  0644,
 				UID:   1000,
@@ -41,6 +42,7 @@ func TestFileRepositoryEdgeCases(t *testing.T) {
 			file: &File{
 				Path:  types.FilePath("/" + strings.Repeat("a", 4096)),
 				MTime: time.Now(),
+				CTime: time.Now(),
 				Size:  1024,
 				Mode:  0644,
 				UID:   1000,
@@ -53,6 +55,7 @@ func TestFileRepositoryEdgeCases(t *testing.T) {
 			file: &File{
 				Path:  "/test/file with spaces and 特殊文字.txt",
 				MTime: time.Now(),
+				CTime: time.Now(),
 				Size:  1024,
 				Mode:  0644,
 				UID:   1000,
@@ -65,6 +68,7 @@ func TestFileRepositoryEdgeCases(t *testing.T) {
 			file: &File{
 				Path:  "/empty.txt",
 				MTime: time.Now(),
+				CTime: time.Now(),
 				Size:  0,
 				Mode:  0644,
 				UID:   1000,
@@ -77,6 +81,7 @@ func TestFileRepositoryEdgeCases(t *testing.T) {
 			file: &File{
 				Path:       "/link",
 				MTime:      time.Now(),
+				CTime:      time.Now(),
 				Size:       0,
 				Mode:       0777 | 0120000, // symlink mode
 				UID:        1000,
@@ -118,6 +123,7 @@ func TestDuplicateHandling(t *testing.T) {
 		file1 := &File{
 			Path:  "/duplicate.txt",
 			MTime: time.Now(),
+			CTime: time.Now(),
 			Size:  1024,
 			Mode:  0644,
 			UID:   1000,
@@ -126,6 +132,7 @@ func TestDuplicateHandling(t *testing.T) {
 		file2 := &File{
 			Path:  "/duplicate.txt", // Same path
 			MTime: time.Now().Add(time.Hour),
+			CTime: time.Now().Add(time.Hour),
 			Size:  2048,
 			Mode:  0644,
 			UID:   1000,
@@ -185,6 +192,7 @@ func TestDuplicateHandling(t *testing.T) {
 		file := &File{
 			Path:  "/test-dup-fc.txt",
 			MTime: time.Now(),
+			CTime: time.Now(),
 			Size:  1024,
 			Mode:  0644,
 			UID:   1000,
@@ -236,6 +244,7 @@ func TestNullHandling(t *testing.T) {
 		file := &File{
 			Path:       "/regular.txt",
 			MTime:      time.Now(),
+			CTime:      time.Now(),
 			Size:       1024,
 			Mode:       0644,
 			UID:        1000,
@@ -340,6 +349,7 @@ func TestLargeDatasets(t *testing.T) {
 			file := &File{
 				Path:  types.FilePath(fmt.Sprintf("/large/file%05d.txt", i)),
 				MTime: time.Now(),
+				CTime: time.Now(),
 				Size:  int64(i * 1024),
 				Mode:  0644,
 				UID:   uint32(1000 + (i % 10)),
@@ -464,6 +474,7 @@ func TestQueryInjection(t *testing.T) {
 			file := &File{
 				Path:  types.FilePath(injection),
 				MTime: time.Now(),
+				CTime: time.Now(),
 				Size:  1024,
 				Mode:  0644,
 				UID:   1000,
@@ -502,6 +513,7 @@ func TestTimezoneHandling(t *testing.T) {
 	file := &File{
 		Path:  "/timezone-test.txt",
 		MTime: nyTime,
+		CTime: nyTime,
 		Size:  1024,
 		Mode:  0644,
 		UID:   1000,
--- a/internal/database/schema.sql
+++ b/internal/database/schema.sql
@@ -8,6 +8,7 @@ CREATE TABLE IF NOT EXISTS files (
    path TEXT NOT NULL UNIQUE,
    source_path TEXT NOT NULL DEFAULT '',  -- The source directory this file came from (for restore path stripping)
    mtime INTEGER NOT NULL,
+    ctime INTEGER NOT NULL,
    size INTEGER NOT NULL,
    mode INTEGER NOT NULL,
    uid INTEGER NOT NULL,
--- a/internal/snapshot/backup_test.go
+++ b/internal/snapshot/backup_test.go
@@ -345,8 +345,9 @@ func (b *BackupEngine) Backup(ctx context.Context, fsys fs.FS, root string) (str
 			Size:  info.Size(),
 			Mode:  uint32(info.Mode()),
 			MTime: info.ModTime(),
-			UID:   1000, // Default UID for test
-			GID:   1000, // Default GID for test
+			CTime: info.ModTime(), // Use mtime as ctime for test
+			UID:   1000,           // Default UID for test
+			GID:   1000,           // Default GID for test
 		}
 		err = b.repos.WithTx(ctx, func(ctx context.Context, tx *sql.Tx) error {
 			return b.repos.Files.Create(ctx, tx, file)
--- a/internal/snapshot/scanner.go
+++ b/internal/snapshot/scanner.go
@@ -785,6 +785,7 @@ func (s *Scanner) checkFileInMemory(path string, info os.FileInfo, knownFiles ma
 		Path:       types.FilePath(path),
 		SourcePath: types.SourcePath(s.currentSourcePath), // Store source directory for restore path stripping
 		MTime:      info.ModTime(),
+		CTime:      info.ModTime(), // afero doesn't provide ctime
 		Size:       info.Size(),
 		Mode:       uint32(info.Mode()),
 		UID:        uid,
--- a/internal/vaultik/helpers.go
+++ b/internal/vaultik/helpers.go
@@ -79,21 +79,6 @@ func parseSnapshotTimestamp(snapshotID string) (time.Time, error) {
 	return timestamp.UTC(), nil
 }

-// parseSnapshotName extracts the snapshot name from a snapshot ID.
-// Format: hostname_snapshotname_timestamp (3 parts) or hostname_timestamp (2 parts, no name).
-// Returns the snapshot name, or empty string if no name component is present.
-func parseSnapshotName(snapshotID string) string {
-	parts := strings.Split(snapshotID, "_")
-	if len(parts) < 3 {
-		// Format: hostname_timestamp — no snapshot name
-		return ""
-	}
-	// Format: hostname_name_timestamp — middle parts are the name.
-	// The last part is the RFC3339 timestamp, the first part is the hostname,
-	// everything in between is the snapshot name (which may itself contain underscores).
-	return strings.Join(parts[1:len(parts)-1], "_")
-}
-
 // parseDuration parses a duration string with support for days
 func parseDuration(s string) (time.Duration, error) {
 	// Check for days suffix
--- a/internal/vaultik/helpers_test.go
+++ b/internal/vaultik/helpers_test.go
@@ -1,119 +0,0 @@
-package vaultik
-
-import (
-	"testing"
-)
-
-func TestParseSnapshotName(t *testing.T) {
-	tests := []struct {
-		name       string
-		snapshotID string
-		want       string
-	}{
-		{
-			name:       "standard format with name",
-			snapshotID: "myhost_home_2026-01-12T14:41:15Z",
-			want:       "home",
-		},
-		{
-			name:       "standard format with different name",
-			snapshotID: "server1_system_2026-02-15T09:30:00Z",
-			want:       "system",
-		},
-		{
-			name:       "no snapshot name (legacy format)",
-			snapshotID: "myhost_2026-01-12T14:41:15Z",
-			want:       "",
-		},
-		{
-			name:       "name with underscores",
-			snapshotID: "myhost_my_special_backup_2026-03-01T00:00:00Z",
-			want:       "my_special_backup",
-		},
-		{
-			name:       "single part (edge case)",
-			snapshotID: "nounderscore",
-			want:       "",
-		},
-		{
-			name:       "empty string",
-			snapshotID: "",
-			want:       "",
-		},
-	}
-
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			got := parseSnapshotName(tt.snapshotID)
-			if got != tt.want {
-				t.Errorf("parseSnapshotName(%q) = %q, want %q", tt.snapshotID, got, tt.want)
-			}
-		})
-	}
-}
-
-func TestParseSnapshotTimestamp(t *testing.T) {
-	tests := []struct {
-		name       string
-		snapshotID string
-		wantErr    bool
-	}{
-		{
-			name:       "valid with name",
-			snapshotID: "myhost_home_2026-01-12T14:41:15Z",
-			wantErr:    false,
-		},
-		{
-			name:       "valid without name",
-			snapshotID: "myhost_2026-01-12T14:41:15Z",
-			wantErr:    false,
-		},
-		{
-			name:       "invalid - single part",
-			snapshotID: "nounderscore",
-			wantErr:    true,
-		},
-		{
-			name:       "invalid - bad timestamp",
-			snapshotID: "myhost_home_notadate",
-			wantErr:    true,
-		},
-	}
-
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			_, err := parseSnapshotTimestamp(tt.snapshotID)
-			if (err != nil) != tt.wantErr {
-				t.Errorf("parseSnapshotTimestamp(%q) error = %v, wantErr %v", tt.snapshotID, err, tt.wantErr)
-			}
-		})
-	}
-}
-
-func TestSnapshotPurgeOptions(t *testing.T) {
-	opts := &SnapshotPurgeOptions{
-		KeepLatest: true,
-		Name:       "home",
-		Force:      true,
-	}
-	if !opts.KeepLatest {
-		t.Error("Expected KeepLatest to be true")
-	}
-	if opts.Name != "home" {
-		t.Errorf("Expected Name to be 'home', got %q", opts.Name)
-	}
-	if !opts.Force {
-		t.Error("Expected Force to be true")
-	}
-
-	opts2 := &SnapshotPurgeOptions{
-		OlderThan: "30d",
-		Name:      "system",
-	}
-	if opts2.OlderThan != "30d" {
-		t.Errorf("Expected OlderThan to be '30d', got %q", opts2.OlderThan)
-	}
-	if opts2.Name != "system" {
-		t.Errorf("Expected Name to be 'system', got %q", opts2.Name)
-	}
-}
--- a/internal/vaultik/purge_per_name_test.go
+++ b/internal/vaultik/purge_per_name_test.go
@@ -1,303 +0,0 @@
-package vaultik_test
-
-import (
-	"bytes"
-	"context"
-	"database/sql"
-	"strings"
-	"testing"
-	"time"
-
-	"git.eeqj.de/sneak/vaultik/internal/database"
-	"git.eeqj.de/sneak/vaultik/internal/log"
-	"git.eeqj.de/sneak/vaultik/internal/types"
-	"git.eeqj.de/sneak/vaultik/internal/vaultik"
-	"github.com/stretchr/testify/assert"
-	"github.com/stretchr/testify/require"
-)
-
-// setupPurgeTest creates a Vaultik instance with an in-memory database and mock
-// storage pre-populated with the given snapshot IDs. Each snapshot is marked as
-// completed. Remote metadata stubs are created so syncWithRemote keeps them.
-func setupPurgeTest(t *testing.T, snapshotIDs []string) *vaultik.Vaultik {
-	t.Helper()
-	log.Initialize(log.Config{})
-
-	ctx := context.Background()
-	db, err := database.New(ctx, ":memory:")
-	require.NoError(t, err)
-	t.Cleanup(func() { _ = db.Close() })
-
-	repos := database.NewRepositories(db)
-	mockStorage := NewMockStorer()
-
-	// Insert each snapshot into the DB and create remote metadata stubs.
-	// Use timestamps parsed from snapshot IDs for realistic ordering.
-	for _, id := range snapshotIDs {
-		// Parse timestamp from the snapshot ID
-		parts := strings.Split(id, "_")
-		timestampStr := parts[len(parts)-1]
-		startedAt, err := time.Parse(time.RFC3339, timestampStr)
-		require.NoError(t, err, "parsing timestamp from snapshot ID %q", id)
-
-		completedAt := startedAt.Add(5 * time.Minute)
-		snap := &database.Snapshot{
-			ID:             types.SnapshotID(id),
-			Hostname:       "testhost",
-			VaultikVersion: "test",
-			StartedAt:      startedAt,
-			CompletedAt:    &completedAt,
-		}
-		err = repos.WithTx(ctx, func(ctx context.Context, tx *sql.Tx) error {
-			return repos.Snapshots.Create(ctx, tx, snap)
-		})
-		require.NoError(t, err, "creating snapshot %s", id)
-
-		// Create remote metadata stub so syncWithRemote keeps it
-		metadataKey := "metadata/" + id + "/manifest.json.zst"
-		err = mockStorage.Put(ctx, metadataKey, strings.NewReader("stub"))
-		require.NoError(t, err)
-	}
-
-	stdout := &bytes.Buffer{}
-	stderr := &bytes.Buffer{}
-	stdin := &bytes.Buffer{}
-
-	v := &vaultik.Vaultik{
-		Storage:      mockStorage,
-		Repositories: repos,
-		DB:           db,
-		Stdout:       stdout,
-		Stderr:       stderr,
-		Stdin:        stdin,
-	}
-	v.SetContext(ctx)
-
-	return v
-}
-
-// listRemainingSnapshots returns IDs of all completed snapshots in the database.
-func listRemainingSnapshots(t *testing.T, v *vaultik.Vaultik) []string {
-	t.Helper()
-	ctx := context.Background()
-	dbSnaps, err := v.Repositories.Snapshots.ListRecent(ctx, 10000)
-	require.NoError(t, err)
-
-	var ids []string
-	for _, s := range dbSnaps {
-		if s.CompletedAt != nil {
-			ids = append(ids, s.ID.String())
-		}
-	}
-	return ids
-}
-
-func TestPurgeKeepLatest_PerName(t *testing.T) {
-	// Create snapshots for two different names: "home" and "system".
-	// With per-name --keep-latest, the latest of each should be kept.
-	snapshotIDs := []string{
-		"testhost_system_2026-01-01T00:00:00Z",
-		"testhost_home_2026-01-01T01:00:00Z",
-		"testhost_system_2026-01-01T02:00:00Z",
-		"testhost_home_2026-01-01T03:00:00Z",
-		"testhost_system_2026-01-01T04:00:00Z",
-	}
-
-	v := setupPurgeTest(t, snapshotIDs)
-
-	err := v.PurgeSnapshotsWithOptions(&vaultik.SnapshotPurgeOptions{
-		KeepLatest: true,
-		Force:      true,
-	})
-	require.NoError(t, err)
-
-	remaining := listRemainingSnapshots(t, v)
-
-	// Should keep the latest of each name
-	assert.Len(t, remaining, 2, "should keep exactly 2 snapshots (one per name)")
-	assert.Contains(t, remaining, "testhost_system_2026-01-01T04:00:00Z", "should keep latest system")
-	assert.Contains(t, remaining, "testhost_home_2026-01-01T03:00:00Z", "should keep latest home")
-}
-
-func TestPurgeKeepLatest_SingleName(t *testing.T) {
-	// All snapshots have the same name — keep-latest should keep exactly one.
-	snapshotIDs := []string{
-		"testhost_home_2026-01-01T00:00:00Z",
-		"testhost_home_2026-01-01T01:00:00Z",
-		"testhost_home_2026-01-01T02:00:00Z",
-	}
-
-	v := setupPurgeTest(t, snapshotIDs)
-
-	err := v.PurgeSnapshotsWithOptions(&vaultik.SnapshotPurgeOptions{
-		KeepLatest: true,
-		Force:      true,
-	})
-	require.NoError(t, err)
-
-	remaining := listRemainingSnapshots(t, v)
-	assert.Len(t, remaining, 1)
-	assert.Contains(t, remaining, "testhost_home_2026-01-01T02:00:00Z", "should keep the newest")
-}
-
-func TestPurgeKeepLatest_WithNameFilter(t *testing.T) {
-	// Use --name to filter purge to only "home" snapshots.
-	// "system" snapshots should be untouched.
-	snapshotIDs := []string{
-		"testhost_system_2026-01-01T00:00:00Z",
-		"testhost_home_2026-01-01T01:00:00Z",
-		"testhost_system_2026-01-01T02:00:00Z",
-		"testhost_home_2026-01-01T03:00:00Z",
-		"testhost_home_2026-01-01T04:00:00Z",
-	}
-
-	v := setupPurgeTest(t, snapshotIDs)
-
-	err := v.PurgeSnapshotsWithOptions(&vaultik.SnapshotPurgeOptions{
-		KeepLatest: true,
-		Force:      true,
-		Name:       "home",
-	})
-	require.NoError(t, err)
-
-	remaining := listRemainingSnapshots(t, v)
-
-	// 2 system snapshots untouched + 1 latest home = 3
-	assert.Len(t, remaining, 3)
-	assert.Contains(t, remaining, "testhost_system_2026-01-01T00:00:00Z")
-	assert.Contains(t, remaining, "testhost_system_2026-01-01T02:00:00Z")
-	assert.Contains(t, remaining, "testhost_home_2026-01-01T04:00:00Z")
-}
-
-func TestPurgeKeepLatest_NoSnapshots(t *testing.T) {
-	v := setupPurgeTest(t, nil)
-
-	err := v.PurgeSnapshotsWithOptions(&vaultik.SnapshotPurgeOptions{
-		KeepLatest: true,
-		Force:      true,
-	})
-	require.NoError(t, err)
-}
-
-func TestPurgeKeepLatest_NameFilterNoMatch(t *testing.T) {
-	snapshotIDs := []string{
-		"testhost_system_2026-01-01T00:00:00Z",
-		"testhost_system_2026-01-01T01:00:00Z",
-	}
-
-	v := setupPurgeTest(t, snapshotIDs)
-
-	err := v.PurgeSnapshotsWithOptions(&vaultik.SnapshotPurgeOptions{
-		KeepLatest: true,
-		Force:      true,
-		Name:       "nonexistent",
-	})
-	require.NoError(t, err)
-
-	// All snapshots should remain — the name filter matched nothing
-	remaining := listRemainingSnapshots(t, v)
-	assert.Len(t, remaining, 2)
-}
-
-func TestPurgeOlderThan_WithNameFilter(t *testing.T) {
-	// Snapshots with different names and timestamps.
-	// --older-than should apply only to the named subset when --name is used.
-	snapshotIDs := []string{
-		"testhost_system_2020-01-01T00:00:00Z",
-		"testhost_home_2020-01-01T00:00:00Z",
-		"testhost_system_2026-01-01T00:00:00Z",
-		"testhost_home_2026-01-01T00:00:00Z",
-	}
-
-	v := setupPurgeTest(t, snapshotIDs)
-
-	// Purge only "home" snapshots older than 365 days
-	err := v.PurgeSnapshotsWithOptions(&vaultik.SnapshotPurgeOptions{
-		OlderThan: "365d",
-		Force:     true,
-		Name:      "home",
-	})
-	require.NoError(t, err)
-
-	remaining := listRemainingSnapshots(t, v)
-
-	// Old system stays (not filtered by name), old home deleted, recent ones stay
-	assert.Len(t, remaining, 3)
-	assert.Contains(t, remaining, "testhost_system_2020-01-01T00:00:00Z")
-	assert.Contains(t, remaining, "testhost_system_2026-01-01T00:00:00Z")
-	assert.Contains(t, remaining, "testhost_home_2026-01-01T00:00:00Z")
-}
-
-func TestPurgeKeepLatest_LegacyNoNameSnapshots(t *testing.T) {
-	// Legacy snapshots without a name component (hostname_timestamp).
-	// Should be grouped together under empty-name.
-	snapshotIDs := []string{
-		"testhost_2026-01-01T00:00:00Z",
-		"testhost_2026-01-01T01:00:00Z",
-		"testhost_2026-01-01T02:00:00Z",
-	}
-
-	v := setupPurgeTest(t, snapshotIDs)
-
-	err := v.PurgeSnapshotsWithOptions(&vaultik.SnapshotPurgeOptions{
-		KeepLatest: true,
-		Force:      true,
-	})
-	require.NoError(t, err)
-
-	remaining := listRemainingSnapshots(t, v)
-	assert.Len(t, remaining, 1)
-	assert.Contains(t, remaining, "testhost_2026-01-01T02:00:00Z")
-}
-
-func TestPurgeKeepLatest_MixedNamedAndLegacy(t *testing.T) {
-	// Mix of named snapshots and legacy ones (no name).
-	snapshotIDs := []string{
-		"testhost_2026-01-01T00:00:00Z",
-		"testhost_home_2026-01-01T01:00:00Z",
-		"testhost_2026-01-01T02:00:00Z",
-		"testhost_home_2026-01-01T03:00:00Z",
-	}
-
-	v := setupPurgeTest(t, snapshotIDs)
-
-	err := v.PurgeSnapshotsWithOptions(&vaultik.SnapshotPurgeOptions{
-		KeepLatest: true,
-		Force:      true,
-	})
-	require.NoError(t, err)
-
-	remaining := listRemainingSnapshots(t, v)
-
-	// Should keep latest of each group: latest legacy + latest home
-	assert.Len(t, remaining, 2)
-	assert.Contains(t, remaining, "testhost_2026-01-01T02:00:00Z")
-	assert.Contains(t, remaining, "testhost_home_2026-01-01T03:00:00Z")
-}
-
-func TestPurgeKeepLatest_ThreeNames(t *testing.T) {
-	// Three different snapshot names with multiple snapshots each.
-	snapshotIDs := []string{
-		"testhost_home_2026-01-01T00:00:00Z",
-		"testhost_system_2026-01-01T01:00:00Z",
-		"testhost_media_2026-01-01T02:00:00Z",
-		"testhost_home_2026-01-01T03:00:00Z",
-		"testhost_system_2026-01-01T04:00:00Z",
-		"testhost_media_2026-01-01T05:00:00Z",
-		"testhost_home_2026-01-01T06:00:00Z",
-	}
-
-	v := setupPurgeTest(t, snapshotIDs)
-
-	err := v.PurgeSnapshotsWithOptions(&vaultik.SnapshotPurgeOptions{
-		KeepLatest: true,
-		Force:      true,
-	})
-	require.NoError(t, err)
-
-	remaining := listRemainingSnapshots(t, v)
-	assert.Len(t, remaining, 3, "should keep one per name")
-	assert.Contains(t, remaining, "testhost_home_2026-01-01T06:00:00Z")
-	assert.Contains(t, remaining, "testhost_system_2026-01-01T04:00:00Z")
-	assert.Contains(t, remaining, "testhost_media_2026-01-01T05:00:00Z")
-}
--- a/internal/vaultik/snapshot.go
+++ b/internal/vaultik/snapshot.go
@@ -520,30 +520,8 @@ func (v *Vaultik) printSnapshotTable(snapshots []SnapshotInfo) error {
 	return w.Flush()
 }

-// SnapshotPurgeOptions contains options for the snapshot purge command
-type SnapshotPurgeOptions struct {
-	KeepLatest bool
-	OlderThan  string
-	Force      bool
-	Name       string // Filter purge to a specific snapshot name
-}
-
-// PurgeSnapshots removes old snapshots based on criteria.
-// When keepLatest is true, retention is applied per snapshot name — the latest
-// snapshot for each distinct name is kept.
+// PurgeSnapshots removes old snapshots based on criteria
 func (v *Vaultik) PurgeSnapshots(keepLatest bool, olderThan string, force bool) error {
-	return v.PurgeSnapshotsWithOptions(&SnapshotPurgeOptions{
-		KeepLatest: keepLatest,
-		OlderThan:  olderThan,
-		Force:      force,
-	})
-}
-
-// PurgeSnapshotsWithOptions removes old snapshots based on criteria with full options.
-// When KeepLatest is true, retention is applied per snapshot name — the latest
-// snapshot for each distinct name is kept. If Name is non-empty, only snapshots
-// matching that name are considered for purge.
-func (v *Vaultik) PurgeSnapshotsWithOptions(opts *SnapshotPurgeOptions) error {
 	// Sync with remote first
 	if err := v.syncWithRemote(); err != nil {
 		return fmt.Errorf("syncing with remote: %w", err)
@@ -567,51 +545,14 @@ func (v *Vaultik) PurgeSnapshotsWithOptions(opts *SnapshotPurgeOptions) error {
 		}
 	}

-	// If --name is specified, filter to only snapshots matching that name
-	if opts.Name != "" {
-		filtered := make([]SnapshotInfo, 0, len(snapshots))
-		for _, snap := range snapshots {
-			if parseSnapshotName(snap.ID.String()) == opts.Name {
-				filtered = append(filtered, snap)
-			}
-		}
-		snapshots = filtered
-	}
-
 	// Sort by timestamp (newest first)
 	sort.Slice(snapshots, func(i, j int) bool {
 		return snapshots[i].Timestamp.After(snapshots[j].Timestamp)
 	})

-	var toDelete []SnapshotInfo
-
-	if opts.KeepLatest {
-		// Keep the latest snapshot per snapshot name
-		// Group snapshots by name, then mark all but the newest in each group
-		latestByName := make(map[string]bool) // tracks whether we've seen the latest for each name
-		for _, snap := range snapshots {
-			name := parseSnapshotName(snap.ID.String())
-			if latestByName[name] {
-				// Already kept the latest for this name — delete this one
-				toDelete = append(toDelete, snap)
-			} else {
-				// This is the latest (sorted newest-first) — keep it
-				latestByName[name] = true
-			}
-		}
-	} else if opts.OlderThan != "" {
-		// Parse duration
-		duration, err := parseDuration(opts.OlderThan)
-		if err != nil {
-			return fmt.Errorf("invalid duration: %w", err)
-		}
-
-		cutoff := time.Now().UTC().Add(-duration)
-		for _, snap := range snapshots {
-			if snap.Timestamp.Before(cutoff) {
-				toDelete = append(toDelete, snap)
-			}
-		}
+	toDelete, err := v.collectSnapshotsToPurge(snapshots, keepLatest, olderThan)
+	if err != nil {
+		return err
 	}

 	if len(toDelete) == 0 {
@@ -619,7 +560,37 @@ func (v *Vaultik) PurgeSnapshotsWithOptions(opts *SnapshotPurgeOptions) error {
 		return nil
 	}

-	return v.confirmAndExecutePurge(toDelete, opts.Force)
+	return v.confirmAndExecutePurge(toDelete, force)
+}
+
+// collectSnapshotsToPurge determines which snapshots to delete based on retention criteria
+func (v *Vaultik) collectSnapshotsToPurge(snapshots []SnapshotInfo, keepLatest bool, olderThan string) ([]SnapshotInfo, error) {
+	if keepLatest {
+		// Keep only the most recent snapshot
+		if len(snapshots) > 1 {
+			return snapshots[1:], nil
+		}
+		return nil, nil
+	}
+
+	if olderThan != "" {
+		// Parse duration
+		duration, err := parseDuration(olderThan)
+		if err != nil {
+			return nil, fmt.Errorf("invalid duration: %w", err)
+		}
+
+		cutoff := time.Now().UTC().Add(-duration)
+		var toDelete []SnapshotInfo
+		for _, snap := range snapshots {
+			if snap.Timestamp.Before(cutoff) {
+				toDelete = append(toDelete, snap)
+			}
+		}
+		return toDelete, nil
+	}
+
+	return nil, nil
 }

 // confirmAndExecutePurge shows deletion candidates, confirms with user, and deletes snapshots
@@ -1017,6 +988,7 @@ func (v *Vaultik) listAllRemoteSnapshotIDs() ([]string, error) {
 	log.Info("Listing all snapshots")
 	objectCh := v.Storage.ListStream(v.ctx, "metadata/")

+	seen := make(map[string]bool)
 	var snapshotIDs []string
 	for object := range objectCh {
 		if object.Err != nil {
@@ -1031,14 +1003,8 @@ func (v *Vaultik) listAllRemoteSnapshotIDs() ([]string, error) {
 			}
 			if strings.HasSuffix(object.Key, "/") || strings.Contains(object.Key, "/manifest.json.zst") {
 				sid := parts[1]
-				found := false
-				for _, id := range snapshotIDs {
-					if id == sid {
-						found = true
-						break
-					}
-				}
-				if !found {
+				if !seen[sid] {
+					seen[sid] = true
 					snapshotIDs = append(snapshotIDs, sid)
 				}
 			}