From b8e5f9f3b139b30629d4cff25b7a2d22ce54994b Mon Sep 17 00:00:00 2001
From: bbedward <bbedward@gmail.com>
Date: Fri, 13 Feb 2026 09:40:51 -0500
Subject: [PATCH] matugen: support v4

---
 core/internal/matugen/matugen.go | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/core/internal/matugen/matugen.go b/core/internal/matugen/matugen.go
index 5d9d4a74..206f92a4 100644
--- a/core/internal/matugen/matugen.go
+++ b/core/internal/matugen/matugen.go
@@ -80,6 +80,7 @@ func (c *ColorMode) GTKTheme() string {
 var (
 	matugenVersionOnce sync.Once
 	matugenSupportsCOE bool
+	matugenIsV4        bool
 )
 
 type Options struct {
@@ -537,9 +538,13 @@ func checkMatugenVersion() {
 		}
 
 		matugenSupportsCOE = major > 3 || (major == 3 && minor >= 1)
+		matugenIsV4 = major >= 4
 		if matugenSupportsCOE {
 			log.Infof("Matugen %s supports --continue-on-error", versionStr)
 		}
+		if matugenIsV4 {
+			log.Infof("Matugen %s: using v4 flags", versionStr)
+		}
 	})
 }
 
@@ -549,6 +554,9 @@ func runMatugen(args []string) error {
 	if matugenSupportsCOE {
 		args = append([]string{"--continue-on-error"}, args...)
 	}
+	if matugenIsV4 {
+		args = append(args, "--source-color-index", "0")
+	}
 
 	cmd := exec.Command("matugen", args...)
 	cmd.Stdout = os.Stdout
@@ -557,6 +565,8 @@ func runMatugen(args []string) error {
 }
 
 func runMatugenDryRun(opts *Options) (string, error) {
+	checkMatugenVersion()
+
 	var args []string
 	switch opts.Kind {
 	case "hex":
@@ -565,6 +575,9 @@ func runMatugenDryRun(opts *Options) (string, error) {
 		args = []string{opts.Kind, opts.Value}
 	}
 	args = append(args, "-m", "dark", "-t", opts.MatugenType, "--json", "hex", "--dry-run")
+	if matugenIsV4 {
+		args = append(args, "--source-color-index", "0", "--old-json-output")
+	}
 
 	cmd := exec.Command("matugen", args...)
 	output, err := cmd.Output()