httk v1 task compatibility provenance
=====================================

The compatibility implementations in ``compat/ht_tasks_api_v1.sh`` and
``compat/vasptools_v1.sh`` derive from these files in the httk v1 repository:

* ``Execution/tasks/ht_tasks_api.sh``
* ``Execution/tasks/vasp/vasptools.sh``

The repository history attributes their design and implementation primarily
to Rickard Armiento, with later contributions by Henrik Levämäki (``hpleava``),
Joel Davidsson (including the ``j-euler`` identity), Christopher Tholander,
Gabriel Persson, and other httk contributors. Relevant recorded changes
include:

* Henrik Levämäki, ``77d0ece`` and ``ca7bcd2`` (shell maintenance);
* Joel Davidsson, ``e4d6b9f`` and ``7449118``;
* Gabriel Persson, ``737dcc4``;
* Christopher Tholander, ``87f6f84`` and ``81436e1``.

The separate Python interfaces formerly at
``src/httk/task/ht_tasks_api.py`` and ``src/httk/task/vasptools.py`` were
introduced in commit ``7672f868`` and developed by Henrik Levämäki
(``hpleava``, ``henrik.levamaki@gmail.com``). Their files identify:

    Copyright (C) 2022 Henrik Levämäki

Those Python modules are not copied into httk-workflow. The v2 workflow code
uses its own filesystem protocol and v1 process adapter; the historical Python
interfaces are acknowledged here to keep authorship explicit when comparing
the two designs.

The independently structured native-v2 runtime, VASP diagnostics, and reviewed
remedy policy also acknowledge this prior work. Their public contracts and
storage formats are new, but the functional coverage audit and diagnostic
vocabulary were informed by the attributed v1 shell and Python interfaces.

The compatibility shell implementation remains available under the
GNU Affero General Public License, version 3 or later. See ``LICENSE``.
