fix(task): lint step fails on findings instead of printing 'not installed' (#41)

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

test/lintgate/lintgate_test.go

@@ -40,6 +40,17 @@ func scratchModule(t *testing.T) string {
 	return dir
 }
 
+// hasSkipNotice reports whether the skip notice was printed as output. Task echoes the command
+// line first, and that line contains the same words, so a substring match would be vacuous.
+func hasSkipNotice(out string) bool {
+	for _, line := range strings.Split(out, "\n") {
+		if strings.HasPrefix(line, "golangci-lint not installed") {
+			return true
+		}
+	}
+	return false
+}
+
 // runLint runs `task lint` in dir with the given PATH and returns its combined output and exit code.
 func runLint(t *testing.T, dir, path string) (string, int) {
 	t.Helper()
@@ -73,7 +84,7 @@ func TestTaskLint_ExitsNonZeroWhenGolangciLintReportsAFinding(t *testing.T) {
 	if code == 0 {
 		t.Fatalf("task lint exited 0 on a module with an unchecked error; output:\n%s", out)
 	}
-	if strings.Contains(out, "not installed") {
+	if hasSkipNotice(out) {
 		t.Fatalf("task lint blamed a missing binary for a lint failure; output:\n%s", out)
 	}
 }
@@ -91,7 +102,7 @@ func TestTaskLint_SkipsWithANoticeWhenGolangciLintIsAbsent(t *testing.T) {
 	if code != 0 {
 		t.Fatalf("task lint exited %d without golangci-lint on PATH; output:\n%s", code, out)
 	}
-	if !strings.Contains(out, "not installed") {
+	if !hasSkipNotice(out) {
 		t.Fatalf("expected the skip notice; output:\n%s", out)
 	}
 }