Quack means Quick UnpACK: a small native archive extractor for AmigaOS 3.2.
Double-click a new LHA, LZX, ZIP or TAR archive and Quack extracts it into
an adjacent drawer named after the archive, without its extension.
Workbench refreshes the open parent window automatically, so the new
drawer appears immediately after extraction. No manual Update is needed.
The extracted drawer stays closed.

Tested on a real Amiga 1200.

- Automatic DefIcons setup for future iconless archives.
- Compact ReAction progress window with Cancel and a duck mascot in dialogs.
- Native Installer icon and RestoreDefaults tool.
- Existing destination drawers are preserved.

Requires a 68020 or better, AmigaOS 3.2+, ReAction and DefIcons.
Also tested on an emulated A1200 with 2 MB Chip RAM and no Fast RAM.
Files with their own .info retain their own Default Tool.
Show All Files is needed to see iconless archives in Workbench.
Restart once after installation, even if DefIcons is already running.
This was required on the real A1200 to activate the new archive defaults.

Includes unchanged XAD 13.0 TestBuild 3 (68020) and LhA/LZX/Zip/Tar clients.
This is an upstream beta runtime. Existing XAD installations are preserved.
Quack is MIT-licensed; XAD is GPL/LGPL. License texts are included.

Matching complete source: util/arc/quack_src.lha, version 1.0.
The separate source download is not needed to install or use Quack.
See README-Amiga.txt, SOURCES.txt and VERIFICATION.txt inside the archive.
Author: Johannes Naumanen
Contact: xmies (at) live (dot) com

 PERMSSN    UID  GID    PACKED    SIZE  RATIO METHOD CRC     STAMP          NAME
---------- ----------- ------- ------- ------ ---------- ------------ -------------
drwxr-xr-x   501/20          0       0 ****** -lhd- 0000 Oct 13 13:57 Quack-1.0/
-rw-r--r--   501/20        939    1750  53.7% -lh5- 06d8 Oct 13 13:57 Quack-1.0/Aminet.readme
-rwxr-xr-x   501/20      14358   26800  53.6% -lh5- ab5c Oct 13 13:47 Quack-1.0/Install
-rw-r--r--   501/20        220     450  48.9% -lh5- 26b7 Oct 13 12:48 Quack-1.0/Install.info
-rw-r--r--   501/20        724    1228  59.0% -lh5- 8dc5 Oct 13 13:47 Quack-1.0/LICENSE
-rwxr-xr-x   501/20      15082   26936  56.0% -lh5- ad79 Oct 13 13:47 Quack-1.0/Quack
-rw-r--r--   501/20        172     450  38.2% -lh5- 92d8 Oct 13 11:19 Quack-1.0/Quack.info
-rw-r--r--   501/20       2280    4929  46.3% -lh5- cc87 Oct 13 13:57 Quack-1.0/README-Amiga.txt
-rwxr-xr-x   501/20      14358   26800  53.6% -lh5- ab5c Oct 13 13:47 Quack-1.0/RestoreDefaults
-rw-r--r--   501/20        172     450  38.2% -lh5- 92d8 Oct 13 11:19 Quack-1.0/RestoreDefaults.info
drwxr-xr-x   501/20          0       0 ****** -lhd- 0000 Oct 13 13:57 Quack-1.0/Runtime/
drwxr-xr-x   501/20          0       0 ****** -lhd- 0000 Oct 13 13:57 Quack-1.0/Runtime/xad/
-rw-r--r--   501/20       3076    4584  67.1% -lh5- ecc6 Apr 11  2026 Quack-1.0/Runtime/xad/LZX
-rw-r--r--   501/20      12226   19540  62.6% -lh5- f6b1 Apr 11  2026 Quack-1.0/Runtime/xad/LhA
-rw-r--r--   501/20       1362    1964  69.3% -lh5- c898 Apr 11  2026 Quack-1.0/Runtime/xad/Tar
-rw-r--r--   501/20      10705   19104  56.0% -lh5- 014d Apr 11  2026 Quack-1.0/Runtime/xad/Zip
-rw-r--r--   501/20      28557   49152  58.1% -lh5- 9b98 Apr 25  2025 Quack-1.0/Runtime/xadmaster.library
-rw-r--r--   501/20        856    1598  53.6% -lh5- d57b Oct 13 13:47 Quack-1.0/SOURCES.txt
drwxr-xr-x   501/20          0       0 ****** -lhd- 0000 Oct 13 13:57 Quack-1.0/ThirdParty/
-rw-r--r--   501/20        404     724  55.8% -lh5- ff2d Oct 13 13:10 Quack-1.0/ThirdParty/Installer-icon-NOTICE.txt
-rw-r--r--   501/20        284     670  42.4% -lh5- e3fe Oct 13 13:57 Quack-1.0/ThirdParty/XAD-COPYING.txt
-rw-r--r--   501/20       7015   18009  39.0% -lh5- e98e Jan 20  2023 Quack-1.0/ThirdParty/gpl.txt
-rw-r--r--   501/20       9650   26430  36.5% -lh5- 10a2 Jan 20  2023 Quack-1.0/ThirdParty/lgpl.txt
-rw-r--r--   501/20       4612   11047  41.7% -lh5- b0cd Oct 13 13:57 Quack-1.0/VERIFICATION.txt
-rw-r--r--   501/20        467     751  62.2% -lh5- b80d Oct 13 13:57 Quack-1.0/XAD-MANIFEST.json
-rw-r--r--   501/20        252     628  40.1% -lh5- aed7 Oct 13 11:19 Quack-1.0.info
---------- ----------- ------- ------- ------ ---------- ------------ -------------
 Total        26 files  127771  243994  52.4%            Oct 13 23:16