From a4b7f0fc34b8fcfd8ff49628a6af921bf51c6761 Mon Sep 17 00:00:00 2001
From: "John Paul E. Balandan, CPA" <paulbalandan@gmail.com>
Date: Mon, 21 Sep 2026 21:10:21 +0800
Subject: [PATCH] chore: enforce no merge commits in PRs

---
 .github/carson.yml | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/.github/carson.yml b/.github/carson.yml
index 37cf003c5e9c..663c6553047c 100644
--- a/.github/carson.yml
+++ b/.github/carson.yml
@@ -4,6 +4,7 @@ version: 1
 subscribers:
   - auto-labeler
   - conflicts-notifier
+  - no-merge-commits
   - no-response-closer
   - pr-title-linter
   - signed-commits
@@ -38,6 +39,14 @@ settings:
       You may want to sync :arrows_counterclockwise: your branch with upstream!
 
       Ref: [Syncing Your Branch](https://github.com/codeigniter4/CodeIgniter4/blob/develop/contributing/workflow.md#updating-your-branch)
+  no-merge-commits:
+    name: 'Carson / no-merge-commits'
+    treat_merge_commits_as: failure
+    exempt_branches:
+      - head: '^develop$'
+        base: '^master$'
+      - head: '^4\.\d+$'
+        base: '^develop$'
   no-response-closer:
     rules:
       - label: needs template