diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index ae917dcd..adce991c 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -17,8 +17,6 @@
         uses: "./.github/workflows/lint.yml"
       variants:
         uses: "./.github/workflows/variants.yml"
-      typecheck:
-        uses: "./.github/workflows/typecheck.yml"
 
       # Always build & lint package.
       build-package:
@@ -27,7 +25,6 @@
           - lint
           - tests
           - variants
-          - typecheck
         runs-on: ubuntu-latest
         permissions:
           attestations: write
diff --git a/.github/workflows/typecheck.yml b/.github/workflows/typecheck.yml
deleted file mode 100644
index 32f9a8a9..00000000
--- a/.github/workflows/typecheck.yml
+++ /dev/null
@@ -1,28 +0,0 @@
-name: Type checks
-
-on:
-  push:
-  workflow_call:
-  workflow_dispatch:
-
-jobs:
-  build:
-    runs-on: ubuntu-latest
-
-    steps:
-    - uses: actions/checkout@v6
-
-    - name: Set up uv
-      uses: astral-sh/setup-uv@v7
-      with:
-        enable-cache: true
-        cache-dependency-glob: "pyproject.toml"
-
-    - name: Set up Python 3.13
-      run: uv python install 3.13
-
-    - name: Install Project
-      run: make install
-
-    - name: Run Typechecks
-      run: make typecheck
diff --git a/CHANGES.md b/CHANGES.md
index 2b1d40e6..e3ca06dd 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## 2.2.0
+
+- Feature: Add `qa.ty` domain for Astral's ty type checker.
+  ty is an extremely fast Python type checker (10-100x faster than mypy).
+  Registers with both CHECK_TARGETS and TYPECHECK_TARGETS for fast feedback.
+  [jensens]
+
 ## 2.1.0
 
 - Enhancement: Use tables in the generated sphinx code for topic/domains.
diff --git a/Makefile b/Makefile
index 59bf154c..c703f83e 100644
--- a/Makefile
+++ b/Makefile
@@ -8,11 +8,9 @@
 #: core.mxfiles
 #: core.packages
 #: docs.sphinx
-#: qa.coverage
-#: qa.isort
-#: qa.mypy
 #: qa.ruff
 #: qa.test
+#: qa.ty
 #
 # SETTINGS (ALL CHANGES MADE BELOW SETTINGS WILL BE LOST)
 ##############################################################################
@@ -111,12 +109,6 @@ MXMAKE?=-e .
 # Default: src
 RUFF_SRC?=src
 
-## qa.isort
-
-# Source folder to scan for Python files to run isort on.
-# Default: src
-ISORT_SRC?=src
-
 ## docs.sphinx
 
 # Documentation source folder.
@@ -148,6 +140,17 @@ PROJECT_CONFIG?=mx.ini
 # Default: false
 PACKAGES_ALLOW_PRERELEASES?=false
 
+## qa.ty
+
+# Source folder for type checking.
+# Default: src
+TY_SRC?=src
+
+# Target Python version for type checking (e.g., 3.12).
+# Leave empty to use default detection.
+# No default value.
+TY_PYTHON_VERSION?=
+
 ## qa.test
 
 # The command which gets executed. Defaults to the location the
@@ -164,23 +167,6 @@ TEST_REQUIREMENTS?=pytest
 # No default value.
 TEST_DEPENDENCY_TARGETS?=
 
-## qa.coverage
-
-# The command which gets executed. Defaults to the location the
-# :ref:`run-coverage` template gets rendered to if configured.
-# Default: .mxmake/files/run-coverage.sh
-COVERAGE_COMMAND?=.mxmake/files/run-coverage.sh
-
-## qa.mypy
-
-# Source folder for code analysis.
-# Default: src
-MYPY_SRC?=src
-
-# Mypy Python requirements to be installed (via pip).
-# Default: types-setuptools
-MYPY_REQUIREMENTS?=types-setuptools types-docutils types-PyYAML
-
 ## core.help
 
 # Request to show all targets, descriptions and arguments for a given domain.
@@ -383,45 +369,6 @@ FORMAT_TARGETS+=ruff-format
 DIRTY_TARGETS+=ruff-dirty
 CLEAN_TARGETS+=ruff-clean
 
-##############################################################################
-# isort
-##############################################################################
-
-# Adjust ISORT_SRC to respect PROJECT_PATH_PYTHON if still at default
-ifeq ($(ISORT_SRC),src)
-ISORT_SRC:=$(PYTHON_PROJECT_PREFIX)src
-endif
-
-ISORT_TARGET:=$(SENTINEL_FOLDER)/isort.sentinel
-$(ISORT_TARGET): $(MXENV_TARGET)
-	@echo "Install isort"
-	@$(PYTHON_PACKAGE_COMMAND) install isort
-	@touch $(ISORT_TARGET)
-
-.PHONY: isort-check
-isort-check: $(ISORT_TARGET)
-	@echo "Run isort check"
-	@isort --check $(ISORT_SRC)
-
-.PHONY: isort-format
-isort-format: $(ISORT_TARGET)
-	@echo "Run isort format"
-	@isort $(ISORT_SRC)
-
-.PHONY: isort-dirty
-isort-dirty:
-	@rm -f $(ISORT_TARGET)
-
-.PHONY: isort-clean
-isort-clean: isort-dirty
-	@test -e $(MXENV_PYTHON) && $(MXENV_PYTHON) -m pip uninstall -y isort || :
-
-INSTALL_TARGETS+=$(ISORT_TARGET)
-CHECK_TARGETS+=isort-check
-FORMAT_TARGETS+=isort-format
-DIRTY_TARGETS+=isort-dirty
-CLEAN_TARGETS+=isort-clean
-
 ##############################################################################
 # sphinx
 ##############################################################################
@@ -567,6 +514,47 @@ INSTALL_TARGETS+=packages
 DIRTY_TARGETS+=packages-dirty
 CLEAN_TARGETS+=packages-clean
 
+##############################################################################
+# ty
+##############################################################################
+
+# Adjust TY_SRC to respect PROJECT_PATH_PYTHON if still at default
+ifeq ($(TY_SRC),src)
+TY_SRC:=$(PYTHON_PROJECT_PREFIX)src
+endif
+
+# Build ty flags
+TY_FLAGS:=
+ifneq ($(TY_PYTHON_VERSION),)
+TY_FLAGS+=--python-version $(TY_PYTHON_VERSION)
+endif
+
+TY_TARGET:=$(SENTINEL_FOLDER)/ty.sentinel
+$(TY_TARGET): $(MXENV_TARGET)
+	@echo "Install ty"
+	@$(PYTHON_PACKAGE_COMMAND) install ty
+	@touch $(TY_TARGET)
+
+.PHONY: ty
+ty: $(PACKAGES_TARGET) $(TY_TARGET)
+	@echo "Run ty"
+	@ty check $(TY_FLAGS) $(TY_SRC)
+
+.PHONY: ty-dirty
+ty-dirty:
+	@rm -f $(TY_TARGET)
+
+.PHONY: ty-clean
+ty-clean: ty-dirty
+	@test -e $(MXENV_PYTHON) && $(MXENV_PYTHON) -m pip uninstall -y ty || :
+	@rm -rf .ty
+
+INSTALL_TARGETS+=$(TY_TARGET)
+CHECK_TARGETS+=ty
+TYPECHECK_TARGETS+=ty
+CLEAN_TARGETS+=ty-clean
+DIRTY_TARGETS+=ty-dirty
+
 ##############################################################################
 # test
 ##############################################################################
@@ -596,69 +584,6 @@ INSTALL_TARGETS+=$(TEST_TARGET)
 CLEAN_TARGETS+=test-clean
 DIRTY_TARGETS+=test-dirty
 
-##############################################################################
-# coverage
-##############################################################################
-
-COVERAGE_TARGET:=$(SENTINEL_FOLDER)/coverage.sentinel
-$(COVERAGE_TARGET): $(TEST_TARGET)
-	@echo "Install Coverage"
-	@$(PYTHON_PACKAGE_COMMAND) install -U coverage
-	@touch $(COVERAGE_TARGET)
-
-.PHONY: coverage
-coverage: $(FILES_TARGET) $(SOURCES_TARGET) $(PACKAGES_TARGET) $(COVERAGE_TARGET)
-	@test -z "$(COVERAGE_COMMAND)" && echo "No coverage command defined" && exit 1 || :
-	@echo "Run coverage using $(COVERAGE_COMMAND)"
-	@/usr/bin/env bash -c "$(COVERAGE_COMMAND)"
-
-.PHONY: coverage-dirty
-coverage-dirty:
-	@rm -f $(COVERAGE_TARGET)
-
-.PHONY: coverage-clean
-coverage-clean: coverage-dirty
-	@test -e $(MXENV_PYTHON) && $(MXENV_PYTHON) -m pip uninstall -y coverage || :
-	@rm -rf .coverage htmlcov
-
-INSTALL_TARGETS+=$(COVERAGE_TARGET)
-DIRTY_TARGETS+=coverage-dirty
-CLEAN_TARGETS+=coverage-clean
-
-##############################################################################
-# mypy
-##############################################################################
-
-# Adjust MYPY_SRC to respect PROJECT_PATH_PYTHON if still at default
-ifeq ($(MYPY_SRC),src)
-MYPY_SRC:=$(PYTHON_PROJECT_PREFIX)src
-endif
-
-MYPY_TARGET:=$(SENTINEL_FOLDER)/mypy.sentinel
-$(MYPY_TARGET): $(MXENV_TARGET)
-	@echo "Install mypy"
-	@$(PYTHON_PACKAGE_COMMAND) install mypy $(MYPY_REQUIREMENTS)
-	@touch $(MYPY_TARGET)
-
-.PHONY: mypy
-mypy: $(PACKAGES_TARGET) $(MYPY_TARGET)
-	@echo "Run mypy"
-	@mypy $(MYPY_SRC)
-
-.PHONY: mypy-dirty
-mypy-dirty:
-	@rm -f $(MYPY_TARGET)
-
-.PHONY: mypy-clean
-mypy-clean: mypy-dirty
-	@test -e $(MXENV_PYTHON) && $(MXENV_PYTHON) -m pip uninstall -y mypy || :
-	@rm -rf .mypy_cache
-
-INSTALL_TARGETS+=$(MYPY_TARGET)
-TYPECHECK_TARGETS+=mypy
-CLEAN_TARGETS+=mypy-clean
-DIRTY_TARGETS+=mypy-dirty
-
 ##############################################################################
 # help
 ##############################################################################
diff --git a/src/mxmake/main.py b/src/mxmake/main.py
index 2ef31b4f..7112c4bf 100644
--- a/src/mxmake/main.py
+++ b/src/mxmake/main.py
@@ -67,6 +67,8 @@ def list_command(args: argparse.Namespace):
         sys.stdout.write(f"Requested domain not found: {args.domain}\n")
         sys.exit(1)
 
+    assert domain is not None  # type narrowing for ty
+
     sys.stdout.write(f"Domain {topic.name}.{domain.name}:\n")
     depends = ", ".join(domain.depends) if domain.depends else "No dependencies"
     sys.stdout.write(f"  Depends: {depends}\n")
diff --git a/src/mxmake/templates.py b/src/mxmake/templates.py
index ab39f360..b83b84f8 100644
--- a/src/mxmake/templates.py
+++ b/src/mxmake/templates.py
@@ -58,19 +58,23 @@ def __init__(
         # XXX: if environment is None, default to ``get_template_environment``?
         self.environment = environment
 
-    @abc.abstractproperty
+    @property
+    @abc.abstractmethod
     def target_folder(self) -> Path:
         """Target folder for rendered template."""
 
-    @abc.abstractproperty
+    @property
+    @abc.abstractmethod
     def target_name(self) -> str:
         """Target file name for rendered template."""
 
-    @abc.abstractproperty
+    @property
+    @abc.abstractmethod
     def template_name(self) -> str:
         """Template name to use."""
 
-    @abc.abstractproperty
+    @property
+    @abc.abstractmethod
     def template_variables(self) -> dict[str, typing.Any]:
         """Variables for template rendering."""
 
diff --git a/src/mxmake/testing/__init__.py b/src/mxmake/testing/__init__.py
index 7e14d5ff..0cb753bc 100644
--- a/src/mxmake/testing/__init__.py
+++ b/src/mxmake/testing/__init__.py
@@ -73,10 +73,6 @@ def __init__(
 
 
 class RenderTestCase(unittest.TestCase):
-    class Example:
-        def __init__(self, want):
-            self.want = want + "\n"
-
     class Failure(Exception):
         pass
 
@@ -96,6 +92,8 @@ def checkOutput(self, want, got, optionflags=None):
         if not success:
             raise RenderTestCase.Failure(
                 self._checker.output_difference(
-                    RenderTestCase.Example(want), got, optionflags
+                    doctest.Example(source="", want=want + "\n"),
+                    got,
+                    optionflags,
                 )
             )
diff --git a/src/mxmake/tests/test_templates.py b/src/mxmake/tests/test_templates.py
index 8751b45a..be752330 100644
--- a/src/mxmake/tests/test_templates.py
+++ b/src/mxmake/tests/test_templates.py
@@ -52,7 +52,7 @@ class Template(templates.Template):
     def test_Template(self, tempdir: Path):
         # cannot instantiate abstract template
         with self.assertRaises(TypeError):
-            templates.Template()  # type: ignore
+            templates.Template()
 
         # create test template
         class Template(templates.Template):
diff --git a/src/mxmake/tests/test_topics.py b/src/mxmake/tests/test_topics.py
index b95e26e9..92e6d2f1 100644
--- a/src/mxmake/tests/test_topics.py
+++ b/src/mxmake/tests/test_topics.py
@@ -3,6 +3,7 @@
 from dataclasses import field
 from mxmake import testing
 from mxmake import topics
+from pathlib import Path
 
 import configparser
 import typing
@@ -57,10 +58,13 @@
 
 @dataclass
 class _TestDomain(topics.Domain):
+    file: str | Path = field(default=Path())
     depends_: list[str] = field(default_factory=list)
     soft_depends_: list[str] = field(default_factory=list)
 
     def __post_init__(self) -> None:
+        if isinstance(self.file, str):
+            self.file = Path(self.file)
         self.runtime_depends = self.depends + self.soft_depends
 
     @property
@@ -167,7 +171,9 @@ def test_Topic(self, tmpdir):
         self.assertEqual(topic_domains[1].name, "domain-b")
         self.assertEqual(topic_domains[1].topic, "topic")
 
-        self.assertEqual(topic.domain("domain-a").name, "domain-a")
+        domain_a = topic.domain("domain-a")
+        assert domain_a is not None
+        self.assertEqual(domain_a.name, "domain-a")
         self.assertEqual(topic.domain("inexistent"), None)
 
     def test_DomainConflictError(self):
@@ -182,7 +188,7 @@ def test_CircularDependencyDomainError(self):
             str(err),
             (
                 "Domains define circular dependencies: [_TestDomain("
-                "topic='t1', name='f1', file='f1.mk', depends_=['f2'], soft_depends_=[])]"
+                f"topic='t1', name='f1', file={Path('f1.mk')!r}, depends_=['f2'], soft_depends_=[])]"
             ),
         )
 
@@ -193,7 +199,7 @@ def test_MissingDependencyDomainError(self):
             str(err),
             (
                 "Domain define missing dependency: _TestDomain("
-                "topic='t', name='t', file='t.mk', depends_=['missing'], soft_depends_=[])"
+                f"topic='t', name='t', file={Path('t.mk')!r}, depends_=['missing'], soft_depends_=[])"
             ),
         )
 
diff --git a/src/mxmake/topics.py b/src/mxmake/topics.py
index 85dd7125..fb8e27b1 100644
--- a/src/mxmake/topics.py
+++ b/src/mxmake/topics.py
@@ -165,7 +165,7 @@ def domain(self, name: str) -> Domain | None:
 
 @functools.lru_cache(maxsize=4096)
 def load_topics() -> list[Topic]:
-    return [ep.load() for ep in load_eps_by_group("mxmake.topics")]  # type: ignore
+    return [ep.load() for ep in load_eps_by_group("mxmake.topics")]
 
 
 def get_topic(name: str) -> Topic:
diff --git a/src/mxmake/topics/qa/ty.mk b/src/mxmake/topics/qa/ty.mk
new file mode 100644
index 00000000..c6346722
--- /dev/null
+++ b/src/mxmake/topics/qa/ty.mk
@@ -0,0 +1,63 @@
+#:[ty]
+#:title = ty
+#:description = Static type checking with ty (Astral's fast type checker).
+#:depends = core.packages
+#:
+#:[target.ty]
+#:description = Run ty type checker.
+#:
+#:[setting.TY_SRC]
+#:description = Source folder for type checking.
+#:default = src
+#:
+#:[setting.TY_PYTHON_VERSION]
+#:description = Target Python version for type checking (e.g., 3.12).
+#:  Leave empty to use default detection.
+#:default =
+#:
+#:[target.ty-dirty]
+#:description = Marks ty dirty.
+#:
+#:[target.ty-clean]
+#:description = Uninstall ty and removes cached data.
+
+##############################################################################
+# ty
+##############################################################################
+
+# Adjust TY_SRC to respect PROJECT_PATH_PYTHON if still at default
+ifeq ($(TY_SRC),src)
+TY_SRC:=$(PYTHON_PROJECT_PREFIX)src
+endif
+
+# Build ty flags
+TY_FLAGS:=
+ifneq ($(TY_PYTHON_VERSION),)
+TY_FLAGS+=--python-version $(TY_PYTHON_VERSION)
+endif
+
+TY_TARGET:=$(SENTINEL_FOLDER)/ty.sentinel
+$(TY_TARGET): $(MXENV_TARGET)
+	@echo "Install ty"
+	@$(PYTHON_PACKAGE_COMMAND) install ty
+	@touch $(TY_TARGET)
+
+.PHONY: ty
+ty: $(PACKAGES_TARGET) $(TY_TARGET)
+	@echo "Run ty"
+	@ty check $(TY_FLAGS) $(TY_SRC)
+
+.PHONY: ty-dirty
+ty-dirty:
+	@rm -f $(TY_TARGET)
+
+.PHONY: ty-clean
+ty-clean: ty-dirty
+	@test -e $(MXENV_PYTHON) && $(MXENV_PYTHON) -m pip uninstall -y ty || :
+	@rm -rf .ty
+
+INSTALL_TARGETS+=$(TY_TARGET)
+CHECK_TARGETS+=ty
+TYPECHECK_TARGETS+=ty
+CLEAN_TARGETS+=ty-clean
+DIRTY_TARGETS+=ty-dirty
diff --git a/src/mxmake/utils.py b/src/mxmake/utils.py
index 8eaf305b..778d4d57 100644
--- a/src/mxmake/utils.py
+++ b/src/mxmake/utils.py
@@ -1,7 +1,6 @@
 from pathlib import Path
 
 import os
-import typing
 
 
 NAMESPACE = "mxmake-"
@@ -27,7 +26,7 @@ def ns_name(name: str) -> str:
     return f"{NAMESPACE}{name}"
 
 
-def list_value(value: str) -> list[str]:
+def list_value(value: str | None) -> list[str]:
     """Convert string value from config file to list of strings. Separator is
     space. Supports newline.
     """