From 8589bfc03ffdb30085c82155f11fc2bac617d146 Mon Sep 17 00:00:00 2001
From: Tom Longhurst <30480171+thomhurst@users.noreply.github.com>
Date: Sat, 4 Apr 2026 17:28:34 +0100
Subject: [PATCH] ci: add concurrency groups to cancel redundant workflow runs

Prevents redundant CI runs when new commits are pushed to a PR branch,
saving runner time and reducing queue contention.
---
 .github/workflows/claude-code-review.yml            | 4 ++++
 .github/workflows/cloudshop-example.yml             | 4 ++++
 .github/workflows/codeql.yml                        | 4 ++++
 .github/workflows/deploy-pages-test.yml             | 4 ++++
 .github/workflows/deploy-pages.yml                  | 6 +++++-
 .github/workflows/dotnet-build-different-locale.yml | 4 ++++
 .github/workflows/dotnet.yml                        | 4 ++++
 7 files changed, 29 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/claude-code-review.yml b/.github/workflows/claude-code-review.yml
index c55fc9b552..d5823c9063 100644
--- a/.github/workflows/claude-code-review.yml
+++ b/.github/workflows/claude-code-review.yml
@@ -16,6 +16,10 @@ on:
         required: true
         type: number
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
 jobs:
   claude-review:
     # Optional: Filter by PR author
diff --git a/.github/workflows/cloudshop-example.yml b/.github/workflows/cloudshop-example.yml
index 141c19d67e..09a475a682 100644
--- a/.github/workflows/cloudshop-example.yml
+++ b/.github/workflows/cloudshop-example.yml
@@ -7,6 +7,10 @@ on:
     branches: ["main"]
   workflow_dispatch:
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
 jobs:
   integration-tests:
     runs-on: ubuntu-latest
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index 2bd6730e81..1af9fb5010 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -19,6 +19,10 @@ on:
   schedule:
     - cron: '0 0 * * 5'
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
 jobs:
   analyze:
     name: Analyze (${{ matrix.language }})
diff --git a/.github/workflows/deploy-pages-test.yml b/.github/workflows/deploy-pages-test.yml
index f7dddc272e..31977319c2 100644
--- a/.github/workflows/deploy-pages-test.yml
+++ b/.github/workflows/deploy-pages-test.yml
@@ -5,6 +5,10 @@ on:
     branches:
       - main
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
 jobs:
   test-deploy:
     name: Test Deploy to GitHub Pages
diff --git a/.github/workflows/deploy-pages.yml b/.github/workflows/deploy-pages.yml
index 2040177ff8..7d09c35602 100644
--- a/.github/workflows/deploy-pages.yml
+++ b/.github/workflows/deploy-pages.yml
@@ -4,7 +4,11 @@ on:
   push:
     branches:
       - main
-   
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
 permissions:
   contents: write
 
diff --git a/.github/workflows/dotnet-build-different-locale.yml b/.github/workflows/dotnet-build-different-locale.yml
index 21309e9d00..6e10919bee 100644
--- a/.github/workflows/dotnet-build-different-locale.yml
+++ b/.github/workflows/dotnet-build-different-locale.yml
@@ -4,6 +4,10 @@ on:
   pull_request:
     branches: ["main"]
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
 jobs:
   modularpipeline:
     strategy:
diff --git a/.github/workflows/dotnet.yml b/.github/workflows/dotnet.yml
index b371771891..439480e68f 100644
--- a/.github/workflows/dotnet.yml
+++ b/.github/workflows/dotnet.yml
@@ -14,6 +14,10 @@ on:
         type: boolean
         required: true
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
 jobs:
   modularpipeline:
     environment: ${{ github.ref == 'refs/heads/main' && 'Production' || 'Pull Requests' }}