Fix outdated contributing file

Author: treyhunner

CONTRIBUTING.rst

@@ -1,20 +1,6 @@
 Contributor Guide
 =================
 
-Thank you for your interest in improving this project.
-This project is open-source under the `MIT license`_ and
-welcomes contributions in the form of bug reports, feature requests, and pull requests.
-
-Here is a list of important resources for contributors:
-
-- `Source Code`_
-- `Issue Tracker`_
-- `Code of Conduct`_
-
-.. _MIT license: https://opensource.org/licenses/MIT
-.. _Source Code: https://github.com/treyhunner/countdown-cli
-.. _Issue Tracker: https://github.com/treyhunner/countdown-cli/issues
-
 How to report a bug
 -------------------
 
@@ -41,81 +27,47 @@ Request features on the `Issue Tracker`_.
 How to set up your development environment
 ------------------------------------------
 
-You need Python 3.7+ and the following tools:
-
-- Poetry_
-- Nox_
-- nox-poetry_
-
-Install the package with development requirements:
+You need Python, uv_, and just_ installed locally.
+Nox_ is optional but required for the multi-version test matrix.
 
-.. code:: console
-
-   $ poetry install
-
-You can now run an interactive Python session,
-or the command-line interface:
+The CLI is exposed through the ``countdown`` script.
+Run it directly from the synced environment:
 
 .. code:: console
 
-   $ poetry run python
-   $ poetry run countdown
+   uv run countdown 6m30s
 
-.. _Poetry: https://python-poetry.org/
+.. _uv: https://docs.astral.sh/uv/
+.. _just: https://github.com/casey/just
 .. _Nox: https://nox.thea.codes/
-.. _nox-poetry: https://nox-poetry.readthedocs.io/
 
 
 How to test the project
 -----------------------
 
-Run the full test suite:
+This project uses pytest_ and Ruff_ orchestrated through ``just`` tasks.
+Before opening a pull request, run the aggregated check:
 
 .. code:: console
 
-   $ nox
+   just check
 
-List the available Nox sessions:
+Useful individual commands:
 
 .. code:: console
 
-   $ nox --list-sessions
-
-You can also run a specific Nox session.
-For example, invoke the unit test suite like this:
-
-.. code:: console
-
-   $ nox --session=tests
+   just test -- -k timer
+   just test-cov            # pytest with coverage (fail_under=100)
 
 Unit tests are located in the ``tests`` directory,
 and are written using the pytest_ testing framework.
+Open ``htmlcov/index.html`` after ``just test-cov`` to debug coverage issues.
 
-.. _pytest: https://pytest.readthedocs.io/
-
-
-How to submit changes
----------------------
-
-Open a `pull request`_ to submit changes to this project.
-
-Your pull request needs to meet the following guidelines for acceptance:
-
-- The Nox test suite must pass without errors and warnings.
-- Include unit tests. This project maintains 100% code coverage.
-- If your changes add functionality, update the documentation accordingly.
-
-Feel free to submit early, though—we can always iterate on this.
-
-To run linting and code formatting checks before committing your change, you can install pre-commit as a Git hook by running the following command:
+If you need to validate across every supported Python version, run:
 
 .. code:: console
 
-   $ nox --session=pre-commit -- install
+   just test-all
 
-It is recommended to open an issue before starting work on anything.
-This will allow a chance to talk it over with the owners and validate your approach.
-
-.. _pull request: https://github.com/treyhunner/countdown-cli/pulls
-.. github-only
-.. _Code of Conduct: CODE_OF_CONDUCT.rst
+.. _pytest: https://pytest.readthedocs.io/
+.. _Ruff: https://docs.astral.sh/ruff/

pyproject.toml

@@ -49,14 +49,6 @@ source = ["countdown", "tests"]
 show_missing = true
 fail_under = 100
 
-[tool.mypy]
-strict = true
-warn_unreachable = true
-pretty = true
-show_column_numbers = true
-show_error_codes = true
-show_error_context = true
-
 [build-system]
 requires = ["hatchling"]
 build-backend = "hatchling.build"