diffcone 0.2.0

Platforms

• Windows is tested in CI (Python 3.11-3.14): commands are split without
  POSIX escapes, the recorder plugin is copied where a symlink is not
  allowed, the recorder reads Windows command lines and existence checks and
  matches short (8.3) path names, and the actions find Python and the
  venv's Scripts directory.

CI

• record takes check: true for a default branch whose every push runs
  the full suite: it plans the push's own change from the previous
  recording, records, and fails the job on a new failure the plan did not
  select that fails again when re-run (a flaky one is only reported).
  fail-on-test-failure: true fails the job on failing tests, as a plain
  test run would. Pull requests then run only the selection.

Planning

• A dynamic import through a literal table of tuples is bounded by the
  table: a PEP 562 lazy-export __getattr__ (target = _LAZY.get(name), then import_module(target[0])) no longer reaches every
  module. D.get(key) reads a literal dict like D[key].
• A lookup by a run-time name on a third-party or standard-library module
  (getattr(logging, level), dir(builtins)) no longer selects every test
  that reaches it whenever anything in its import closure changes, unless
  project code stores something on that module.

Execution evidence

• A test that runs a python -c snippet that can't run project code (an
  interpreter version check importing only built-in modules, with nothing
  after the code and no PYTHONPATH-like environment) or uv python list
  is no longer always selected.
• Editing a module that looks at its own file at import
  (Path(__file__).resolve()) no longer replans all its importers from
  the code: that stat records only that the file exists. Any other stat of
  a source file during a test counts as reading it.
• A test that leaves a thread running is no longer always selected;
  instead every test is credited with the code background threads are in
  the middle of while it runs, which also covers a later test running
  beside a thread that loops in one function.

Discovery

• Test files and directories named after -- replace testpaths, as in
  pytest; a node id, or a path after an option that may take it as its
  value, is reported instead of guessed.
• --ignore and --ignore-glob (in addopts or after --) are honoured,
  below the paths pytest starts from, as pytest applies them:
  ignored tests are no longer targets, which run reported as selected
  but not collected.
• Importing a library's test helper whose name looks like a test class
  (from fastapi.testclient import TestClient, aiohttp's TestServer) no
  longer reports an incomplete target list.
• A conftest pytest does not load (a sibling package's tests, outside
  testpaths) is no longer read or reported.