diff --git a/.github/workflows/build-nugetlibrary-task.yml b/.github/workflows/build-nugetlibrary-task.yml
index 0a5de77f..3bdc4f8b 100644
--- a/.github/workflows/build-nugetlibrary-task.yml
+++ b/.github/workflows/build-nugetlibrary-task.yml
@@ -39,6 +39,7 @@ jobs:
 
       - name: Build NuGet library project step
         run: |
+          set -euo pipefail
           dotnet build ./NuGetLibrary/NuGetLibrary.csproj \
             -property:OutputPath=${{ runner.temp }}/publish/ \
             -property:PackageOutputPath=${{ runner.temp }}/publish/ \
@@ -52,6 +53,7 @@ jobs:
       - name: Publish to NuGet.org step
         if: ${{ inputs.push }}
         run: |
+          set -euo pipefail
           dotnet nuget push ${{ runner.temp }}/publish/*.nupkg \
             --source https://api.nuget.org/v3/index.json \
             --api-key ${{ secrets.NUGET_API_KEY }} \
diff --git a/.github/workflows/run-codegen-app-pull-request-task.yml b/.github/workflows/run-codegen-app-pull-request-task.yml
index 5557f5eb..31dfcb53 100644
--- a/.github/workflows/run-codegen-app-pull-request-task.yml
+++ b/.github/workflows/run-codegen-app-pull-request-task.yml
@@ -43,12 +43,14 @@ jobs:
 
       - name: Run codegen step
         run: |
+          set -euo pipefail
           dotnet run --project ./CodeGen/CodeGen.csproj -- \
             --codepath ./CodeGen \
             --apikey "${{ secrets.NINJA_API_KEY }}"
 
       - name: Format code step
         run: |
+          set -euo pipefail
           dotnet tool restore
           dotnet csharpier format --log-level=debug .
           git status
diff --git a/.github/workflows/run-codegen-pull-request-task.yml b/.github/workflows/run-codegen-pull-request-task.yml
index 88dfc3b2..77b99b52 100644
--- a/.github/workflows/run-codegen-pull-request-task.yml
+++ b/.github/workflows/run-codegen-pull-request-task.yml
@@ -33,12 +33,14 @@ jobs:
 
       - name: Run codegen step
         run: |
+          set -euo pipefail
           dotnet run --project ./CodeGen/CodeGen.csproj -- \
             --codepath ./CodeGen \
             --apikey "${{ secrets.NINJA_API_KEY }}"
 
       - name: Format code step
         run: |
+          set -euo pipefail
           dotnet tool restore
           dotnet csharpier format --log-level=debug .
           git status
@@ -60,6 +62,7 @@ jobs:
       - name: Trigger PR workflows step
         if: steps.cpr.outputs.pull-request-number != ''
         run: |
+          set -euo pipefail
           PR="${{ steps.cpr.outputs.pull-request-number }}"
           gh pr close "$PR"
           gh pr reopen "$PR"
diff --git a/.github/workflows/test-pull-request.yml b/.github/workflows/test-pull-request.yml
index 394ebc9a..dd87da69 100644
--- a/.github/workflows/test-pull-request.yml
+++ b/.github/workflows/test-pull-request.yml
@@ -27,6 +27,7 @@ jobs:
     steps:
       - name: Check workflow results step
         run: |
+          set -euo pipefail
           exit_on_result() {
             if [[ "$2" == "failure" || "$2" == "cancelled" ]]; then
               echo "Job '$1' failed or was cancelled."
diff --git a/.gitignore b/.gitignore
index 8e1e603e..0db2f387 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,8 +8,8 @@
 .artifacts
 .DS_Store
 *.user
+.claude
 
-# Python / uv
 __pycache__/
 *.py[cod]
 *.egg-info/