Moved project into a src-based layout and reorganized tests.

pyproject.toml

@@ -44,24 +44,33 @@ build-backend = "hatchling.build"
 source = "vcs"
 
 [tool.hatch.build.targets.wheel]
-packages = ["crabstero"]
+packages = ["src/crabstero"]
 
 [tool.hatch.build.hooks.vcs]
-version-file = "crabstero/_version.py"
+version-file = "src/crabstero/_version.py"
 
 [tool.mypy]
 python_version = "3.14"
 strict = true
 warn_unreachable = true
 explicit_package_bases = true
+mypy_path = "$MYPY_CONFIG_FILE_DIR/src"
 
 [tool.pytest.ini_options]
 asyncio_mode = "auto"
 asyncio_default_fixture_loop_scope = "function"
+testpaths = ["tests"]
+pythonpath = ["src"]
+addopts = [
+    "--import-mode=importlib",
+    "--strict-config",
+    "--strict-markers",
+]
+xfail_strict = true
 
 [tool.ruff]
 target-version = "py314"
-extend-exclude = ["crabstero/_version.py"]  # auto-generated by hatch-vcs
+extend-exclude = ["src/crabstero/_version.py"]  # auto-generated by hatch-vcs
 
 [tool.ruff.lint]
 select = ["ALL"]
@@ -81,7 +90,7 @@ ignore = [
 ]
 
 [tool.ruff.lint.per-file-ignores]
-"crabstero/__init__.py" = ["E402"]  # version fallback is resolved before public imports
+"src/crabstero/__init__.py" = ["E402"]  # version fallback is resolved before public imports
 "tests/**" = [
     "S101",     # assert is standard for pytest
     "S311",     # pseudo-random generators are fine in tests
@@ -91,12 +100,12 @@ ignore = [
 ]
 
 [tool.codespell]
-skip = "crabstero/_version.py,uv.lock"
+skip = "src/crabstero/_version.py,uv.lock"
 
 [tool.coverage.run]
 source = ["crabstero"]
 omit = [
-    "crabstero/_version.py",
+    "src/crabstero/_version.py",
 ]
 
 [tool.coverage.report]