diff --git a/pyproject.toml b/pyproject.toml
index e51aecb..0e1b01a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -127,6 +127,21 @@ extra-dependencies = [
   "pydantic"
 ]
 
+[tool.hatch.envs.default]
+extra-dependencies = [
+  "dirty-equals>=0.7.0",
+  "hypothesis>=6.75.5",
+  "mypy>=1.2.0",
+  "pyright>=1.1.359",
+  "pytest-subtests>=0.11.0",
+  "time-machine>=2.10.0",
+  "pydantic",
+
+  "pytest-xdist",
+  "textual",
+    "mutmut @ {root:uri}/../mutmut"
+]
+
 [[tool.hatch.envs.types.matrix]]
 python = ["3.8", "3.9", "3.10", "3.11", "3.12","3.13"]
 
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..c7ffe58
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,12 @@
+
+.
+dirty-equals>=0.7.0
+hypothesis>=6.75.5
+mypy>=1.2.0
+pyright>=1.1.359
+pytest-subtests>=0.11.0
+time-machine>=2.10.0
+pydantic
+
+pytest-xdist
+-e ../mutmut