Isolate CLI tests from host configuration

internal/cli/main_test.go

@@ -0,0 +1,36 @@
+package cli
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+)
+
+func TestMain(m *testing.M) {
+	// Tests supply their own overrides; inherited settings must not affect them.
+	for _, entry := range os.Environ() {
+		key, _, _ := strings.Cut(entry, "=")
+		if strings.HasPrefix(key, "AUDITA_") || key == "OPENROUTER_API_KEY" {
+			if err := os.Unsetenv(key); err != nil {
+				panic(err)
+			}
+		}
+	}
+
+	dir, err := os.MkdirTemp("", "audita-cli-test-config-")
+	if err != nil {
+		panic(err)
+	}
+	defer os.RemoveAll(dir)
+	configPath := filepath.Join(dir, "config.yml")
+	if err := os.WriteFile(configPath, []byte("version: 1\n"), 0600); err != nil {
+		panic(err)
+	}
+	// An explicit environment path prevents discovery of installed system config.
+	// Individual tests can still override it with t.Setenv or --config.
+	if err := os.Setenv("AUDITA_CONFIG", configPath); err != nil {
+		panic(err)
+	}
+	m.Run()
+}