From 512b6a1ca86b14b707accd82d84027ef4f4a17d8 Mon Sep 17 00:00:00 2001
From: PJ Fanning <pjfanning@users.noreply.github.com>
Date: Fri, 19 Jun 2026 15:53:51 +0100
Subject: [PATCH 1/2] [EXPERIMENT] run remote-tests based on recent tags

---
 .../workflows/binary-compatibility-checks.yml |  1 -
 .github/workflows/build-test-prValidation.yml |  2 +-
 .github/workflows/format.yml                  |  3 +-
 .github/workflows/generate-doc-check.yml      |  2 +-
 .github/workflows/headers.yml                 |  2 +-
 .github/workflows/remote-test.yml             | 68 +++++++++++++++++++
 6 files changed, 72 insertions(+), 6 deletions(-)
 create mode 100644 .github/workflows/remote-test.yml

diff --git a/.github/workflows/binary-compatibility-checks.yml b/.github/workflows/binary-compatibility-checks.yml
index 6d5ed8c930..27d45d3064 100644
--- a/.github/workflows/binary-compatibility-checks.yml
+++ b/.github/workflows/binary-compatibility-checks.yml
@@ -18,7 +18,6 @@
 name: Binary Compatibility
 
 on:
-  pull_request:
   push:
     branches:
       - main
diff --git a/.github/workflows/build-test-prValidation.yml b/.github/workflows/build-test-prValidation.yml
index ec29951ff9..2c0c1b5bf3 100644
--- a/.github/workflows/build-test-prValidation.yml
+++ b/.github/workflows/build-test-prValidation.yml
@@ -9,7 +9,7 @@
 name: Pull Requests
 
 on:
-  pull_request:
+  workflow_dispatch:
 
 permissions: {}
 
diff --git a/.github/workflows/format.yml b/.github/workflows/format.yml
index bc61de7269..b588b81279 100644
--- a/.github/workflows/format.yml
+++ b/.github/workflows/format.yml
@@ -20,8 +20,7 @@ name: Scalafmt
 permissions: {}
 
 on:
-  pull_request:
-    branches: ['**']
+  workflow_dispatch:
 
 jobs:
   build:
diff --git a/.github/workflows/generate-doc-check.yml b/.github/workflows/generate-doc-check.yml
index 9c9d6990ad..a1fe10dd6e 100644
--- a/.github/workflows/generate-doc-check.yml
+++ b/.github/workflows/generate-doc-check.yml
@@ -18,7 +18,7 @@
 name: Generate doc check
 
 on:
-  pull_request:
+  workflow_dispatch:
 
 permissions:
   contents: read
diff --git a/.github/workflows/headers.yml b/.github/workflows/headers.yml
index cbf543b5c9..be158c5b44 100644
--- a/.github/workflows/headers.yml
+++ b/.github/workflows/headers.yml
@@ -18,7 +18,7 @@
 name: Headers
 
 on:
-  pull_request:
+  workflow_dispatch:
 
 permissions: {}
 
diff --git a/.github/workflows/remote-test.yml b/.github/workflows/remote-test.yml
new file mode 100644
index 0000000000..f970ba2e52
--- /dev/null
+++ b/.github/workflows/remote-test.yml
@@ -0,0 +1,68 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# license agreements; and to You under the Apache License, version 2.0:
+#
+#   https://www.apache.org/licenses/LICENSE-2.0
+#
+# This file is part of the Apache Pekko project, which was derived from Akka.
+#
+
+name: Remote Test
+
+on:
+  workflow_dispatch:
+  pull_request:
+
+permissions: {}
+
+concurrency:
+  # Only run once for latest commit per ref and cancel other (previous) runs.
+  group: ci-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  remote-test:
+    name: Check / Tests
+    runs-on: ubuntu-22.04
+    strategy:
+      matrix:
+        scalaVersion: ["2.13.x"]
+        checkoutRef: ["v2.0.0-M2", "v2.0.0-M3", "x2.0.0-M4-RC0"]
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6.0.3
+        with:
+          # we don't know what commit the last tag was it's safer to get entire repo so previousStableVersion resolves
+          fetch-depth: 0
+          fetch-tags: 0
+          persist-credentials: false
+          ref: ${{ matrix.checkoutRef }}
+
+      - name: Setup Java 17
+        uses: actions/setup-java@v5
+        with:
+          distribution: temurin
+          java-version: 17
+
+      - name: Install sbt
+        uses: sbt/setup-sbt@af116cce31c00823d3903ce687f9cda3a4f19f1b # v1.2.1
+
+      - name: Cache Coursier cache
+        uses: coursier/cache-action@95e5b1029b6b86e7bac033ee44a0697d8a527d2d # 8.1.1
+
+      - name: Enable jvm-opts
+        run: cp .jvmopts-ci .jvmopts
+
+      - name: sbt remote/test
+        run: |-
+          sbt \
+          -Dpekko.mima.enabled=false \
+          -Dpekko.test.multi-in-test=false \
+          -Dpekko.test.timefactor=2 \
+          -Dpekko.actor.testkit.typed.timefactor=2 \
+          -Dpekko.test.tags.exclude=gh-exclude,timing \
+          -Dpekko.cluster.assert=on \
+          -Dsbt.override.build.repos=false \
+          -Dpekko.test.multi-node=false \
+          -Dsbt.log.noformat=false \
+          -Dpekko.log.timestamps=true \
+          "++ ${{ matrix.scalaVersion }} remote/test"

From bab7b6f72c41f4de5557041a8aaaba27c6425f10 Mon Sep 17 00:00:00 2001
From: PJ Fanning <pjfanning@users.noreply.github.com>
Date: Fri, 19 Jun 2026 17:29:40 +0100
Subject: [PATCH 2/2] Update remote-test.yml

---
 .github/workflows/remote-test.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/remote-test.yml b/.github/workflows/remote-test.yml
index f970ba2e52..4fd66a1389 100644
--- a/.github/workflows/remote-test.yml
+++ b/.github/workflows/remote-test.yml
@@ -26,7 +26,7 @@ jobs:
     strategy:
       matrix:
         scalaVersion: ["2.13.x"]
-        checkoutRef: ["v2.0.0-M2", "v2.0.0-M3", "x2.0.0-M4-RC0"]
+        checkoutRef: ["v2.0.0-M2", "v2.0.0-M3", "main"]
     steps:
       - name: Checkout
         uses: actions/checkout@v6.0.3