@@ -139,5 +139,6 @@ func (d *DockerDigest) ReportConfig() interface{} {
 		Tag:          d.spec.Tag,
 		Digest:       d.spec.Digest,
 		Architecture: d.spec.Architecture,
+		HideTag:      d.spec.HideTag,
 	}
 }
@@ -0,0 +1,22 @@
+package dockerdigest
+
+import (
+	"encoding/json"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestReportConfig_IncludesHideTag(t *testing.T) {
+	source := &DockerDigest{spec: Spec{
+		Image:   "registry.example.com/myapp",
+		Tag:     "v1.0.0",
+		HideTag: true,
+	}}
+
+	data, err := json.Marshal(source.ReportConfig())
+	require.NoError(t, err)
+	assert.Contains(t, string(data), `"HideTag":true`,
+		"ReportConfig() must include HideTag so sources differing only in hidetag get distinct cache keys")
+}
Original file line number	Diff line number	Diff line change
`@@ -139,5 +139,6 @@ func (d *DockerDigest) ReportConfig() interface{} {`
`139`	`139`	`Tag: d.spec.Tag,`
`140`	`140`	`Digest: d.spec.Digest,`
`141`	`141`	`Architecture: d.spec.Architecture,`
	`142`	`+ HideTag: d.spec.HideTag,`
`142`	`143`	`}`
`143`	`144`	`}`