feat: load agent bridge from protected storage

cmd/agent-worker/main.go

@@ -7,6 +7,8 @@ import (
 	"fmt"
 	"net/http"
 	"os"
+	"path/filepath"
+	"strings"
 	"time"
 
 	"git.cin.su/m/Assistant/adapters/agentbridge"
@@ -39,7 +41,7 @@ func main() {
 	}
 	defer repository.Close()
 	var executor ports.AgentExecutor
-	if bridgeURL := os.Getenv("AGENT_EXECUTION_BRIDGE_URL"); bridgeURL != "" {
+	if bridgeURL, bridgeConfigured := loadProtectedBridgeURL(); bridgeConfigured {
 		executor, err = agentbridge.NewHTTPExecutor(bridgeURL, &http.Client{Timeout: *leaseTTL})
 		if err != nil {
 			fmt.Fprintln(os.Stderr, err)
@@ -81,6 +83,27 @@ func main() {
 	}
 }
 
+func loadProtectedBridgeURL() (string, bool) {
+	return loadProtectedBridgeURLFrom("/run/secrets", "/run/secrets/agent_execution_bridge_url")
+}
+
+func loadProtectedBridgeURLFrom(root, path string) (string, bool) {
+	clean := filepath.Clean(path)
+	cleanRoot := filepath.Clean(root)
+	if clean != cleanRoot && !strings.HasPrefix(clean, cleanRoot+string(os.PathSeparator)) {
+		return "", false
+	}
+	payload, err := os.ReadFile(clean)
+	if err != nil {
+		return "", false
+	}
+	value := strings.TrimSpace(string(payload))
+	if value == "" || strings.ContainsAny(value, "\r\n") {
+		return "", false
+	}
+	return value, true
+}
+
 func resolveDatabasePassword(name, refName string, consumer secretcontracts.RuntimeConsumer) (string, error) {
 	if _, ok := os.LookupEnv(name); ok {
 		return "", fmt.Errorf("%s direct environment secret is forbidden", name)

cmd/agent-worker/status.go

@@ -19,7 +19,7 @@ func workerStatusHandler(executorConfigured bool) http.Handler {
 		ExecutorConfigured: executorConfigured,
 		Mode:               "recovery-only",
 		Ready:              false,
-		Reason:             "AGENT_EXECUTION_BRIDGE_URL is not configured",
+		Reason:             "protected agent execution bridge URL is not configured",
 	}
 	if executorConfigured {
 		status.Mode = "execution"

cmd/agent-worker/status_test.go

@@ -4,9 +4,28 @@ import (
 	"encoding/json"
 	"net/http"
 	"net/http/httptest"
+	"os"
+	"path/filepath"
 	"testing"
 )
 
+func TestLoadProtectedBridgeURL(t *testing.T) {
+	root := t.TempDir()
+	path := filepath.Join(root, "agent_execution_bridge_url")
+	if err := os.WriteFile(path, []byte("http://bridge.local\n"), 0o600); err != nil {
+		t.Fatal(err)
+	}
+	if value, configured := loadProtectedBridgeURLFrom(root, path); !configured || value != "http://bridge.local" {
+		t.Fatalf("protected bridge was not loaded: %q %v", value, configured)
+	}
+	if value, configured := loadProtectedBridgeURLFrom(root, filepath.Join(root, "missing")); configured || value != "" {
+		t.Fatalf("missing bridge was accepted: %q %v", value, configured)
+	}
+	if value, configured := loadProtectedBridgeURLFrom(root, "/tmp/not-protected"); configured || value != "" {
+		t.Fatalf("path outside protected root was accepted: %q %v", value, configured)
+	}
+}
+
 func TestWorkerStatusReportsRecoveryOnlyWithoutExecutor(t *testing.T) {
 	response := httptest.NewRecorder()
 	workerStatusHandler(false).ServeHTTP(response, httptest.NewRequest(http.MethodGet, "/status", nil))