fix: use ANTHROPIC_AUTH_TOKEN for Claude CLI env injection

- Change env var from ANTHROPIC_API_KEY to ANTHROPIC_AUTH_TOKEN
- Add Backend field propagation in taskSpec (cli.go)
- Add stderr logging for injected env vars with API key masking
- Add comprehensive tests for env injection flow

Generated with SWE-Agent.ai

Co-Authored-By: SWE-Agent.ai <noreply@swe-agent.ai>

codeagent-wrapper/internal/executor/env_inject_test.go

@@ -0,0 +1,193 @@
+package executor
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+
+	backend "codeagent-wrapper/internal/backend"
+	config "codeagent-wrapper/internal/config"
+)
+
+// TestEnvInjectionWithAgent tests the full flow of env injection with agent config
+func TestEnvInjectionWithAgent(t *testing.T) {
+	// Setup temp config
+	tmpDir := t.TempDir()
+	configDir := filepath.Join(tmpDir, ".codeagent")
+	if err := os.MkdirAll(configDir, 0755); err != nil {
+		t.Fatal(err)
+	}
+
+	// Write test config with agent that has base_url and api_key
+	configContent := `{
+		"default_backend": "codex",
+		"agents": {
+			"test-agent": {
+				"backend": "claude",
+				"model": "test-model",
+				"base_url": "https://test.api.com",
+				"api_key": "test-api-key-12345678"
+			}
+		}
+	}`
+	configPath := filepath.Join(configDir, "models.json")
+	if err := os.WriteFile(configPath, []byte(configContent), 0644); err != nil {
+		t.Fatal(err)
+	}
+
+	// Override HOME to use temp dir
+	oldHome := os.Getenv("HOME")
+	os.Setenv("HOME", tmpDir)
+	defer os.Setenv("HOME", oldHome)
+
+	// Reset config cache
+	config.ResetModelsConfigCacheForTest()
+	defer config.ResetModelsConfigCacheForTest()
+
+	// Test ResolveAgentConfig
+	agentBackend, model, _, _, baseURL, apiKey, _ := config.ResolveAgentConfig("test-agent")
+	t.Logf("ResolveAgentConfig: backend=%q, model=%q, baseURL=%q, apiKey=%q",
+		agentBackend, model, baseURL, apiKey)
+
+	if agentBackend != "claude" {
+		t.Errorf("expected backend 'claude', got %q", agentBackend)
+	}
+	if baseURL != "https://test.api.com" {
+		t.Errorf("expected baseURL 'https://test.api.com', got %q", baseURL)
+	}
+	if apiKey != "test-api-key-12345678" {
+		t.Errorf("expected apiKey 'test-api-key-12345678', got %q", apiKey)
+	}
+
+	// Test Backend.Env
+	b := backend.ClaudeBackend{}
+	env := b.Env(baseURL, apiKey)
+	t.Logf("Backend.Env: %v", env)
+
+	if env == nil {
+		t.Fatal("expected non-nil env from Backend.Env")
+	}
+	if env["ANTHROPIC_BASE_URL"] != baseURL {
+		t.Errorf("expected ANTHROPIC_BASE_URL=%q, got %q", baseURL, env["ANTHROPIC_BASE_URL"])
+	}
+	if env["ANTHROPIC_AUTH_TOKEN"] != apiKey {
+		t.Errorf("expected ANTHROPIC_AUTH_TOKEN=%q, got %q", apiKey, env["ANTHROPIC_AUTH_TOKEN"])
+	}
+}
+
+// TestEnvInjectionLogic tests the exact logic used in executor
+func TestEnvInjectionLogic(t *testing.T) {
+	// Setup temp config
+	tmpDir := t.TempDir()
+	configDir := filepath.Join(tmpDir, ".codeagent")
+	if err := os.MkdirAll(configDir, 0755); err != nil {
+		t.Fatal(err)
+	}
+
+	configContent := `{
+		"default_backend": "codex",
+		"agents": {
+			"explore": {
+				"backend": "claude",
+				"model": "MiniMax-M2.1",
+				"base_url": "https://api.minimaxi.com/anthropic",
+				"api_key": "eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9.test"
+			}
+		}
+	}`
+	configPath := filepath.Join(configDir, "models.json")
+	if err := os.WriteFile(configPath, []byte(configContent), 0644); err != nil {
+		t.Fatal(err)
+	}
+
+	oldHome := os.Getenv("HOME")
+	os.Setenv("HOME", tmpDir)
+	defer os.Setenv("HOME", oldHome)
+
+	config.ResetModelsConfigCacheForTest()
+	defer config.ResetModelsConfigCacheForTest()
+
+	// Simulate the executor logic
+	cfgBackend := "claude" // This should come from taskSpec.Backend
+	agentName := "explore"
+
+	// Step 1: Get backend config (usually empty for claude without global config)
+	baseURL, apiKey := config.ResolveBackendConfig(cfgBackend)
+	t.Logf("Step 1 - ResolveBackendConfig(%q): baseURL=%q, apiKey=%q", cfgBackend, baseURL, apiKey)
+
+	// Step 2: If agent specified, get agent config
+	if agentName != "" {
+		agentBackend, _, _, _, agentBaseURL, agentAPIKey, _ := config.ResolveAgentConfig(agentName)
+		t.Logf("Step 2 - ResolveAgentConfig(%q): backend=%q, baseURL=%q, apiKey=%q",
+			agentName, agentBackend, agentBaseURL, agentAPIKey)
+
+		// Step 3: Check if agent backend matches cfg backend
+		if strings.EqualFold(strings.TrimSpace(agentBackend), strings.TrimSpace(cfgBackend)) {
+			baseURL, apiKey = agentBaseURL, agentAPIKey
+			t.Logf("Step 3 - Backend match! Using agent config: baseURL=%q, apiKey=%q", baseURL, apiKey)
+		} else {
+			t.Logf("Step 3 - Backend mismatch: agent=%q, cfg=%q", agentBackend, cfgBackend)
+		}
+	}
+
+	// Step 4: Get env vars from backend
+	b := backend.ClaudeBackend{}
+	injected := b.Env(baseURL, apiKey)
+	t.Logf("Step 4 - Backend.Env: %v", injected)
+
+	// Verify
+	if len(injected) == 0 {
+		t.Fatal("Expected env vars to be injected, got none")
+	}
+
+	expectedURL := "https://api.minimaxi.com/anthropic"
+	if injected["ANTHROPIC_BASE_URL"] != expectedURL {
+		t.Errorf("ANTHROPIC_BASE_URL: expected %q, got %q", expectedURL, injected["ANTHROPIC_BASE_URL"])
+	}
+
+	if _, ok := injected["ANTHROPIC_AUTH_TOKEN"]; !ok {
+		t.Error("ANTHROPIC_AUTH_TOKEN not set")
+	}
+
+	// Step 5: Test masking
+	for k, v := range injected {
+		masked := maskSensitiveValue(k, v)
+		t.Logf("Step 5 - Env log: %s=%s", k, masked)
+	}
+}
+
+// TestTaskSpecBackendPropagation tests that taskSpec.Backend is properly used
+func TestTaskSpecBackendPropagation(t *testing.T) {
+	// Simulate what happens in RunCodexTaskWithContext
+	taskSpec := TaskSpec{
+		ID:      "test",
+		Task:    "hello",
+		Backend: "claude",
+		Agent:   "explore",
+	}
+
+	// This is the logic from executor.go lines 889-916
+	cfg := &config.Config{
+		Mode:    "new",
+		Task:    taskSpec.Task,
+		Backend: "codex", // default
+	}
+
+	var backend Backend = nil // nil in single mode
+	commandName := "codex"    // default
+
+	if backend != nil {
+		cfg.Backend = backend.Name()
+	} else if taskSpec.Backend != "" {
+		cfg.Backend = taskSpec.Backend
+	} else if commandName != "" {
+		cfg.Backend = commandName
+	}
+
+	t.Logf("taskSpec.Backend=%q, cfg.Backend=%q", taskSpec.Backend, cfg.Backend)
+
+	if cfg.Backend != "claude" {
+		t.Errorf("expected cfg.Backend='claude', got %q", cfg.Backend)
+	}
+}