diff --git a/CONTROLLERS.md b/CONTROLLERS.md
index d3abba5..9930c08 100644
--- a/CONTROLLERS.md
+++ b/CONTROLLERS.md
@@ -8,15 +8,16 @@ Every controller below has a committed `openmicro doctor` report. CI replays cap
 
 <!-- controllers:start -->
 
-| Controller                                | Reports as                      | VID:PID   | Connection | Driver    | Buttons passed | Output        | Status  |
-| ----------------------------------------- | ------------------------------- | --------- | ---------- | --------- | -------------- | ------------- | ------- |
-| GameSir Cyclone 2 (DS4 mode)              | DUALSHOCK 4 Wireless Controller | 054c:05c4 | bluetooth  | ds4       | 17/17          | none          | ✅ full |
-| GameSir G7 Pro                            | GameSir-G7 Pro                  | 3537:1022 | bluetooth  | gamesir   | 17/17          | none          | ✅ full |
-| Microsoft Xbox Elite Series 2             | Controller                      | 045e:0b00 | usb        | xbox      | 17/17          | none          | ✅ full |
-| Microsoft Xbox Elite Series 2 (Bluetooth) | Xbox Wireless Controller        | 045e:0b13 | bluetooth  | xbox      | 17/17          | none          | ✅ full |
-| Microsoft Xbox One S Controller           | Controller                      | 045e:02ea | usb        | xbox      | 17/17          | none          | ✅ full |
-| Microsoft Xbox One S Controller           | Xbox Wireless Controller        | 045e:0b20 | bluetooth  | xbox      | 17/17          | none          | ✅ full |
-| Sony DualSense                            | DualSense Wireless Controller   | 054c:0ce6 | usb        | dualsense | 17/17          | lightbar+LEDs | ✅ full |
+| Controller                                | Reports as                      | VID:PID   | Connection | Driver    | Buttons passed | Output        | Status          |
+| ----------------------------------------- | ------------------------------- | --------- | ---------- | --------- | -------------- | ------------- | --------------- |
+| GameSir Cyclone 2 (DS4 mode)              | DUALSHOCK 4 Wireless Controller | 054c:05c4 | bluetooth  | ds4       | 17/17          | none          | ✅ full         |
+| GameSir G7 Pro                            | GameSir-G7 Pro                  | 3537:1022 | bluetooth  | gamesir   | 17/17          | none          | ✅ full         |
+| Microsoft Xbox Elite Series 2             | Controller                      | 045e:0b00 | usb        | xbox      | 17/17          | none          | ✅ full         |
+| Microsoft Xbox Elite Series 2 (Bluetooth) | Xbox Wireless Controller        | 045e:0b13 | bluetooth  | xbox      | 17/17          | none          | ✅ full         |
+| Microsoft Xbox One S Controller           | Controller                      | 045e:02ea | usb        | xbox      | 17/17          | none          | ✅ full         |
+| Microsoft Xbox One S Controller           | Xbox Wireless Controller        | 045e:0b20 | bluetooth  | xbox      | 17/17          | none          | ✅ full         |
+| Sony DualSense                            | DualSense Wireless Controller   | 054c:0ce6 | usb        | dualsense | 17/17          | lightbar+LEDs | ✅ full         |
+| Stadia Controller rev. A                  | Stadia Controller rev. A        | 18d1:9400 | usb        | none      | —              | none          | 🔴 capture-only |
 
 <!-- controllers:end -->
 
diff --git a/test/fixtures/controllers/18d1-9400-usb.json b/test/fixtures/controllers/18d1-9400-usb.json
new file mode 100644
index 0000000..1bb6e0c
--- /dev/null
+++ b/test/fixtures/controllers/18d1-9400-usb.json
@@ -0,0 +1,137 @@
+{
+  "schemaVersion": 1,
+  "openmicroVersion": "1.4.2",
+  "platform": "darwin",
+  "osVersion": "Darwin Kernel Version 25.5.0: Mon Apr 27 20:38:56 PDT 2026; root:xnu-12377.121.6~2/RELEASE_ARM64_T6000",
+  "controller": {
+    "vid": "0x18d1",
+    "pid": "0x9400",
+    "product": "Stadia Controller rev. A",
+    "transport": "usb",
+    "driver": "none"
+  },
+  "results": {
+    "south": {
+      "status": "capture",
+      "capture": {
+        "idle": "",
+        "pressed": "0308004080808080000000"
+      }
+    },
+    "east": {
+      "status": "capture",
+      "capture": {
+        "idle": "0308000080808080000000",
+        "pressed": "0308002080808080000000"
+      }
+    },
+    "west": {
+      "status": "capture",
+      "capture": {
+        "idle": "0308000080808080000000",
+        "pressed": "0308001080808080003c00"
+      }
+    },
+    "north": {
+      "status": "capture",
+      "capture": {
+        "idle": "0308000080808080002600",
+        "pressed": "0308000880808080000000"
+      }
+    },
+    "dpad_up": {
+      "status": "capture",
+      "capture": {
+        "idle": "0308000080808080000000",
+        "pressed": "0300000080808080000000"
+      }
+    },
+    "dpad_down": {
+      "status": "capture",
+      "capture": {
+        "idle": "0308000080808080000000",
+        "pressed": "0304000080808080000000"
+      }
+    },
+    "dpad_left": {
+      "status": "capture",
+      "capture": {
+        "idle": "0308000080808080000000",
+        "pressed": "0306000080808080000000"
+      }
+    },
+    "dpad_right": {
+      "status": "capture",
+      "capture": {
+        "idle": "0308000080808080000000",
+        "pressed": "0302000080808080000000"
+      }
+    },
+    "l1": {
+      "status": "capture",
+      "capture": {
+        "idle": "0308000080808080000000",
+        "pressed": "0308000480808080000000"
+      }
+    },
+    "r1": {
+      "status": "capture",
+      "capture": {
+        "idle": "0308000080808080000000",
+        "pressed": "0308000280808080000000"
+      }
+    },
+    "l2": {
+      "status": "capture",
+      "capture": {
+        "idle": "0308000080808080000000",
+        "pressed": "0308040080808080ff0000"
+      }
+    },
+    "r2": {
+      "status": "capture",
+      "capture": {
+        "idle": "0308000080808080000000",
+        "pressed": "030808008080808000ff00"
+      }
+    },
+    "l3": {
+      "status": "capture",
+      "capture": {
+        "idle": "0308000080808080000000",
+        "pressed": "0308000180808080000000"
+      }
+    },
+    "r3": {
+      "status": "capture",
+      "capture": {
+        "idle": "0308000080808080000000",
+        "pressed": "0308800080808080000000"
+      }
+    },
+    "menu": {
+      "status": "capture",
+      "capture": {
+        "idle": "0308000080808080000000",
+        "pressed": "0308200080808080000000"
+      }
+    },
+    "view": {
+      "status": "capture",
+      "capture": {
+        "idle": "0308000080808080000000",
+        "pressed": "0308010080808080000000"
+      }
+    },
+    "touchpad": {
+      "status": "capture",
+      "capture": {
+        "idle": "0308000080808080000000",
+        "pressed": "0308100080808080000000"
+      }
+    }
+  },
+  "axes": {},
+  "output": "unsupported",
+  "timestamp": "2026-08-12T17:42:17.239Z"
+}