From a1060602836433b7cb49df34e2b577f04897afcc Mon Sep 17 00:00:00 2001
From: Alex Gemberg <gemberg@canva.com>
Date: Fri, 22 May 2026 16:09:53 +1000
Subject: [PATCH] ci: cancel superseded workflow runs for PR pushes

---
 .github/workflows/ci.yml | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 37776fd31..962b492d1 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -69,6 +69,11 @@ on:
     branches:
       - main
 
+# Cancel superseded CI runs for the same PR to save runner time.
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
+
 jobs:
   fmt:
     name: formatting