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Changelog

All notable changes to ARCHive are documented in this file.

[1.2.1-beta4] - 2026-07-27

Safety and Reliability

  • Explorer selections are accepted before the first-run notice and forwarded through a current-user-only named pipe, preventing multi-selection paths from being lost during startup.
  • Failed copy jobs now remove the entire dated output whenever cleanup succeeds, matching cancellation behavior and avoiding ambiguous partial results.
  • Archive verification is mandatory. A created archive is published only after the 7-Zip integrity test succeeds.
  • Drive classification now uses the correct Windows NVMe bus value and the device seek-penalty descriptor, avoiding HDDs being treated as SSDs.
  • Extract context-menu entries explicitly accept only one selected archive.

Distribution

  • The GitHub prerelease provides the installer, Markdown instructions, plain-text instructions and disclosures, and editable questionnaire as four separate downloadable files.
  • Automated coverage is 48 unit tests and 26 integration tests (74 total).

[1.2.0-beta3] - 2026-07-27

Features

  • Windows Explorer context menu integration — three context menu entries are now available when right-clicking files or folders in Windows Explorer:
    • Copy with ARCHive — appears for any file or folder selection; opens ARCHive with the Copy action pre-selected and files loaded.
    • Archive with ARCHive — appears for any file or folder selection; opens ARCHive with the Create Archive action pre-selected and files loaded.
    • Extract with ARCHive — appears only for .7z and .zip files; opens ARCHive with the Extract Archive action ready for a single archive.

User Experience

  • Context menu icons — each context menu entry displays the ARCHive icon alongside the text label for visual identification.
  • Command-line argument protocol — ARCHive now accepts --copy, --archive, and --extract arguments with source file paths, enabling the context menu integration. A clear error message is shown if the Windows command-line length limit is exceeded.
  • Version bump — release upgraded from 1.1.0-beta2 to 1.2.0-beta3.

Installer

  • Context menu registry entries — the installer now adds context menu entries under HKEY_CURRENT_USER for files, folders, and archive file associations. Entries are automatically removed on uninstall.

Documentation

  • Context menu disclosure — installation disclosure and user instructions updated to describe the new context menu entries and their behavior.

Bug Fixes

  • Multi-file context menu single-instance fix — Windows Explorer invokes %1 context menu commands once per selected file, which previously opened multiple ARCHive instances (one per file) instead of one instance with all files loaded. Added SingleInstanceService with named mutex detection and named pipe IPC so subsequent launches send their file paths to the running instance and exit. The first instance collects all files into a single window.

[1.1.0-beta2] - 2026-07-27

Bug Fixes

  • DriveClassifier P/Invoke corrected — STORAGE_PROPERTY_QUERY no longer includes a marshaled byte[] field that shifted subsequent struct fields. RemovableMedia changed from short to byte to match the Win32 BOOLEAN type, fixing offset errors in STORAGE_DEVICE_DESCRIPTOR reads. Bus-type constants corrected to match Windows STORAGE_BUS_TYPE values (SCSI=0x01, USB=0x07, SATA=0x0B, NVMe=0x0D).
  • Double-buffer consistency — single-file copy loop now uses await readTask instead of .Result for consistency with async patterns.

User Experience

  • Cancel-vs-fail summary text hardened — all runner failure paths now explicitly state whether incomplete output was removed or preserved at the destination. Cancel messages clearly state the source was not modified. Extraction failures note that any files written before failure are preserved.
  • Version bump — release upgraded from 1.0.0-beta1 to 1.1.0-beta2.

Testing

  • New integration tests: many small files, cancel-after-partial-progress, cancel-vs-fail summary distinction, archive verify on/off.
  • New unit tests: DriveClassifier bus-type mapping via reflection.
  • Test counts updated to 41 unit + 27 integration (68 total).

[Unreleased]

Performance

  • Double-buffered file copy pipeline — single-file and folder-copy runners now overlap read and write operations using two buffers, improving throughput on fast storage (CopyJobRunner.cs, PausableFolderCopyRunner.cs).
  • Adaptive buffer sizing — buffer size is selected per file based on size: 256 KB (small), 1 MB (medium), 4 MB (large), replacing the previous fixed 1 MB buffer for all files.
  • ArrayPool buffer rental — copy buffers are rented from System.Buffers.ArrayPool<byte>.Shared instead of allocating fresh arrays on every file, reducing GC pressure during large jobs.
  • Drive-aware concurrency — DriveClassifier queries IOCTL_STORAGE_QUERY_PROPERTY via P/Invoke to detect NVMe, SATA, USB, SCSI, and network bus types, then selects 2/4/8 concurrent copy slots based on drive speed class (DriveClassifier.cs).

User Experience

  • Verify-after-create toggle — the Create Archive panel now includes an optional "Verify after create" checkbox (enabled by default). Unchecking it skips the post-create 7z t verification pass, saving time for trusted sources. The toggle is wired through ArchiveCreateSpec.VerifyAfterCreate, ArchiveJobPlanner, and SevenZipArchiveRunner (MainWindow.xaml).
  • ZIP compression tuning — the CompressionArguments helper now returns separate argument arrays and applies ZIP-specific defaults (Deflate is used implicitly by 7-Zip for .zip format; dictionary-size tuning is applied for the Smallest preset).

Resilience

  • Source-change retry with 2-second backoff — when a file's source changes during copy (SourceChangedException), the per-file retry loop now retries up to 3 times with a 2-second delay (previously only non-source-change IOException was retried with a 5-second delay) (CopyFileWithRetryAsync).
  • Partial output preservation on failure — folder-copy failure now preserves already-copied files at the destination instead of deleting the entire output tree, allowing users to keep partially completed work when a source changes mid-copy.

Code Quality

  • Dead-code removal — removed ~542 lines of unused robocopy infrastructure from CopyJobRunner.cs, including RunRobocopyAsync, MonitorRobocopyProgressAsync, VerifyFolderCopy, MeasureTree, and related types, reducing the file from 756 to 214 lines.
  • Shared utility extraction — PathUtilities in ARCHive.Core now houses TryGetAvailableFreeSpace, TryGetDriveFormat, TryGetDriveType, GetTopLevelName, FormatArgumentsForLog, and FormatBytesForLog, consumed by the copy, archive, and infrastructure layers.

Testing

  • Integration test RunAsync_SourceChangeWhilePausedFailsAndRemovesOutput renamed to RunAsync_SourceChangeWhilePausedFailsAndPreservesPartialOutput to match the new partial-preservation behavior.
  • All 52 tests (32 unit + 20 integration) pass.