From 808774a53010b8fe1b5f371b7a5b99b554d9e3b2 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Thu, 8 Jan 2026 17:21:32 +0000
Subject: [PATCH 1/3] Initial plan


From 34259b3ecfe1381ca55cb47a76ef0e9c610fccef Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Thu, 8 Jan 2026 17:27:04 +0000
Subject: [PATCH 2/3] Add mypy to pre-commit hooks and configure in
 pyproject.toml

Co-authored-by: Borda <6035284+Borda@users.noreply.github.com>
---
 .pre-commit-config.yaml | 6 ++++++
 README.md               | 2 +-
 pyproject.toml          | 7 +++++++
 test/test_hello.py      | 2 +-
 4 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index cd63a7d..6c56850 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -55,3 +55,9 @@ repos:
     rev: v2.4.1
     hooks:
       - id: codespell
+  - repo: https://github.com/pre-commit/mirrors-mypy
+    # Static type checker
+    rev: v1.14.1
+    hooks:
+      - id: mypy
+        additional_dependencies: []
diff --git a/README.md b/README.md
index f35fefb..ac7f125 100644
--- a/README.md
+++ b/README.md
@@ -49,7 +49,7 @@ You can run the checks manually on all files:
 pre-commit run --all-files
 ```
 
-So far, **there is no types checking with mypy**. See [issue](https://github.com/roboflow-ai/template-python/issues/4).
+We now use **mypy** for type checking. Type hints are enforced and checked automatically via pre-commit hooks.
 
 ### Tests 🧪
 
diff --git a/pyproject.toml b/pyproject.toml
index d22c330..d0f15c9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -28,6 +28,7 @@ urls."Homepage" = "https://roboflow.com"
 
 [dependency-groups]
 dev = [
+  "mypy",
   "pre-commit",
   "pytest",
   "twine",
@@ -67,3 +68,9 @@ addopts = [
   "--color=yes",
   "--doctest-modules",
 ]
+
+[tool.mypy]
+python_version = "3.9"
+warn_return_any = true
+warn_unused_configs = true
+disallow_untyped_defs = true
diff --git a/test/test_hello.py b/test/test_hello.py
index 39aab3d..55533af 100644
--- a/test/test_hello.py
+++ b/test/test_hello.py
@@ -3,7 +3,7 @@
 from sandbox.hello import hello
 
 
-def test_hello():
+def test_hello() -> None:
     """Test the hello function."""
     res = hello()
     assert res == "World"

From 2a5ffd2ca1eb7a6cf66419edc50b2b3628dca34d Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Thu, 8 Jan 2026 17:28:06 +0000
Subject: [PATCH 3/3] Remove mypy from dev dependencies and clean up pre-commit
 config

Co-authored-by: Borda <6035284+Borda@users.noreply.github.com>
---
 .pre-commit-config.yaml | 1 -
 pyproject.toml          | 1 -
 2 files changed, 2 deletions(-)

diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 6c56850..467074b 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -60,4 +60,3 @@ repos:
     rev: v1.14.1
     hooks:
       - id: mypy
-        additional_dependencies: []
diff --git a/pyproject.toml b/pyproject.toml
index d0f15c9..a698831 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -28,7 +28,6 @@ urls."Homepage" = "https://roboflow.com"
 
 [dependency-groups]
 dev = [
-  "mypy",
   "pre-commit",
   "pytest",
   "twine",