test(lint): the skip notice is found behind CI's colour codes, red

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

test/lintgate/lintgate_test.go

@@ -125,3 +125,15 @@ func TestTaskLint_SkipsWithANoticeWhenGolangciLintIsAbsent(t *testing.T) {
 		t.Fatalf("expected the skip notice; output:\n%s", out)
 	}
 }
+
+// CI runs task with colour on, so the notice line starts with an escape sequence; a bare
+// prefix match missed it there while passing on a terminal-less local run.
+func TestHasSkipNotice_SeesTheNoticeBehindColourCodes(t *testing.T) {
+	out := "\x1b[32mtask: [lint] ...\n\x1b[0mgolangci-lint not installed — skipping (CI installs it)\n"
+	if !hasSkipNotice(out) {
+		t.Fatalf("notice not found in coloured output: %q", out)
+	}
+	if hasSkipNotice("\x1b[32mtask: [lint] if command -v golangci-lint ...; echo \"golangci-lint not installed\"\n") {
+		t.Fatal("the echoed command line must not count as the notice")
+	}
+}