From 17fa9b9b8fcd8f233e20c8b394110e3c0c448993 Mon Sep 17 00:00:00 2001
From: James <james.russo@heygen.com>
Date: Wed, 22 Apr 2026 20:55:20 +0000
Subject: [PATCH] ci(regression): add concurrency group to cancel superseded
 runs

Matches the pattern already in place on ci.yml, docs.yml,
windows-render.yml, and catalog-previews.yml. The regression workflow
was the only one without it.

Without this, rapid pushes to a PR leave prior regression runs still
executing their full matrix (~10 parallel shards across styles-a..g,
fast, render-compat, hdr) even though they'll be thrown away. On a busy
day this alone can eat a double-digit share of the GitHub hosted runner
pool and stretch queues for every open PR.
---
 .github/workflows/regression.yml | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/.github/workflows/regression.yml b/.github/workflows/regression.yml
index ff98df188..b1fe21f08 100644
--- a/.github/workflows/regression.yml
+++ b/.github/workflows/regression.yml
@@ -6,6 +6,10 @@ on:
     branches:
       - main
 
+concurrency:
+  group: regression-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   changes:
     name: Detect changes