Add ty as non-blocking CI check

.github/workflows/ci.yml

@@ -34,6 +34,25 @@ jobs:
     with:
       pre-commit-source: "--group pre-commit"
 
+  ty:
+    name: Type check
+    runs-on: ubuntu-24.04
+    continue-on-error: true
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v6.0.2
+
+    - name: Set up Python
+      uses: actions/setup-python@v6.2.0
+      with:
+        python-version: "3.13"
+
+    - name: Install Tox
+      run: python -m pip install --group tox-uv
+
+    - name: Type check
+      run: tox -e ty
+
   towncrier:
     name: Check towncrier
     uses: beeware/.github/.github/workflows/towncrier-run.yml@main

README.md

@@ -32,7 +32,7 @@ If you would like a full introduction to using Briefcase, try the [BeeWare tutor
 
 The BeeWare project would not be possible without the generous support of our financial members:
 
-[![Anaconda logo](https://beeware.org/community/members/anaconda/anaconda-large.png)](https://anaconda.com/)
+[![Anaconda logo](https://beeware.org/images/anaconda-dark.png)](https://anaconda.com/)
 
 Anaconda Inc. - Advancing AI through open source.
 

changes/2710.misc.md

@@ -0,0 +1 @@
+``ty`` was added as a non-blocking type checker in CI.

docs/en/index.md

@@ -41,7 +41,7 @@ Briefcase is part of the [BeeWare suite](https://beeware.org). You can talk to t
 
 ### Code of Conduct
 
-The BeeWare community has a strict [Code of Conduct](https://beeware.org/community/behavior/code-of-conduct/). All users and developers are expected to adhere to this code.
+The BeeWare community has a strict [Code of Conduct](https://beeware.org/community/code-of-conduct/). All users and developers are expected to adhere to this code.
 
 If you have any concerns about this code of conduct, or you wish to report a violation of this code, please contact the project founder [Russell Keith-Magee](mailto:russell@keith-magee.com).
 

pyproject.toml

@@ -115,6 +115,10 @@ tox-uv = [
     "tox-uv == 1.29.0",
 ]
 
+ty = [
+    "ty == 0.0.18",
+]
+
 dev = [
     {include-group = "pre-commit"},
     {include-group = "setuptools-scm"},
@@ -336,6 +340,12 @@ type = [
     { directory = "misc", name = "Misc", showcontent = false },
 ]
 
+[tool.ty.rules]
+unresolved-attribute = "warn"
+invalid-argument-type = "warn"
+invalid-return-type = "warn"
+unresolved-import = "ignore"
+
 [tool.codespell]
 skip = '.git,*.pdf,*.svg'
 # the way to make case-sensitive skips of words etc

tox.ini

@@ -78,6 +78,12 @@ commands =
     python -m coverage combine
     python -m coverage report --fail-under=100
 
+[testenv:ty]
+skip_install = True
+dependency_groups = ty
+commands = ty check src/briefcase/
+ignore_outcome = True
+
 [testenv:towncrier{,-check}]
 skip_install = True
 dependency_groups = towncrier