diff --git a/.kyzn/.gitignore b/.kyzn/.gitignore
new file mode 100644
index 0000000..101f1a8
--- /dev/null
+++ b/.kyzn/.gitignore
@@ -0,0 +1,3 @@
+# kyzn — gitignored local data
+history/
+reports/
diff --git a/.kyzn/config.yaml b/.kyzn/config.yaml
new file mode 100644
index 0000000..1083170
--- /dev/null
+++ b/.kyzn/config.yaml
@@ -0,0 +1,18 @@
+# kyzn configuration — commit this file
+# Generated by: kyzn init
+# Date: 2026-03-18T00:56:59Z
+
+project:
+  name: pingdiff
+  type: node
+
+preferences:
+  mode: deep
+  budget: 2.50
+  max_turns: 30
+  diff_limit: 2000
+  trust: guardian
+  on_build_fail: report
+
+focus:
+  priorities: ["auto"]
diff --git a/desktop/src/api_client.py b/desktop/src/api_client.py
index cd8c07f..b769924 100644
--- a/desktop/src/api_client.py
+++ b/desktop/src/api_client.py
@@ -236,6 +236,9 @@ def get_servers(self, game_slug: str = "overwatch-2") -> Dict[str, List[Dict]]:
             )
             if response.status_code == 200:
                 servers = response.json()
+                if not isinstance(servers, dict):
+                    logger.warning(f"Unexpected server response type: {type(servers).__name__}")
+                    raise ValueError("API returned non-dict response")
                 total = sum(len(v) for v in servers.values())
                 logger.info(f"Loaded {total} servers from API")
                 return servers
diff --git a/desktop/src/cli.py b/desktop/src/cli.py
index 3b8aeee..870d61f 100644
--- a/desktop/src/cli.py
+++ b/desktop/src/cli.py
@@ -224,6 +224,8 @@ def results_to_csv(results: List[PingResult], best_only: bool = False) -> str:
 
 def progress_callback(completed: int, total: int, result: PingResult) -> None:
     """Show progress during testing."""
+    if total == 0:
+        return
     bar_width = 30
     filled = int(bar_width * completed / total)
     bar = "█" * filled + "░" * (bar_width - filled)
diff --git a/desktop/src/ping_tester.py b/desktop/src/ping_tester.py
index 2eecd68..84f138e 100644
--- a/desktop/src/ping_tester.py
+++ b/desktop/src/ping_tester.py
@@ -245,7 +245,22 @@ def test_all_servers(servers: List[Dict], ping_count: int = 10,
             }
 
             for future in as_completed(future_to_server):
-                result = future.result()
+                try:
+                    result = future.result()
+                except Exception as e:
+                    server = future_to_server[future]
+                    logger.error(f"Unexpected error testing server {server.get('id', '?')}: {e}")
+                    result = PingResult(
+                        server_id=server.get("id", "unknown"),
+                        server_location=server.get("location", "Unknown"),
+                        ip_address=server.get("ip", ""),
+                        ping_avg=0.0, ping_min=0.0, ping_max=0.0,
+                        jitter=0.0, packet_loss=100.0,
+                        successful_pings=0, total_pings=ping_count,
+                        raw_times=[],
+                        region=server.get("region", ""),
+                        error=str(e),
+                    )
                 results.append(result)
                 completed += 1