diff --git a/docs/native-capture-cadence.md b/docs/native-capture-cadence.md
new file mode 100644
index 0000000..5974b26
--- /dev/null
+++ b/docs/native-capture-cadence.md
@@ -0,0 +1,61 @@
+# Native Capture Cadence
+
+This file records measured driver-path camera cadence. It is evidence, not a
+promise.
+
+## 2026-05-21: PS3 Eye Raw USB Probe
+
+Probe location: temp workspace only, outside this repo.
+
+Probe path:
+
+- raw PS3 Eye userspace driver reference;
+- libusb/WinUSB interface 0;
+- Bayer frame output;
+- no DirectShow;
+- no Media Foundation;
+- no frame processing;
+- five-second measurement window.
+
+Installed device state:
+
+- two PS3 Eyes present as `VID_1415&PID_2000`;
+- interface 0 is available through the WinUSB/libusb-style path;
+- interface 1 remains the media/audio side and is not the capture path measured
+  here.
+
+Sequential results:
+
+| Camera | Requested Mode | Frames | Elapsed | Delivered FPS | Avg Delta |
+| --- | ---: | ---: | ---: | ---: | ---: |
+| 0 | 320x240 @ 187 | 934 | 5.002s | 186.72 | 5.355 ms |
+| 1 | 320x240 @ 187 | 917 | 5.001s | 183.35 | 5.454 ms |
+| 0 | 640x480 @ 60 | 292 | 5.006s | 58.33 | 17.118 ms |
+| 1 | 640x480 @ 60 | 290 | 5.010s | 57.89 | 17.237 ms |
+
+Dual-camera results in one process:
+
+| Camera | Requested Mode | Frames | Elapsed | Delivered FPS | Avg Delta |
+| --- | ---: | ---: | ---: | ---: | ---: |
+| 0 | 320x240 @ 187 | 915 | 5.005s | 182.81 | 5.476 ms |
+| 1 | 320x240 @ 187 | 916 | 5.005s | 183.01 | 5.460 ms |
+| 0 | 640x480 @ 60 | 294 | 5.009s | 58.69 | 17.068 ms |
+| 1 | 640x480 @ 60 | 286 | 5.009s | 57.09 | 17.478 ms |
+
+Conclusion: the two PS3 Eyes can be treated as roughly 183 fps timing/marker
+witnesses at 320x240 on the current USB topology when using the raw USB path.
+At 640x480 they are roughly 57-59 fps.
+
+The probe reported one unrelated invalid USB descriptor from
+`USB\VID_0000&PID_0002`; it did not prevent PS3 Eye capture.
+
+## Leap Status
+
+The Leap Motion Controller is currently present as `VID_F182&PID_0003` and bound
+to `usbvideo.sys`, which means the active mode is LeapUVC/UVC. That mode is
+mutually exclusive with the Ultraleap SDK path for this device.
+
+No close-to-metal Leap frame number has been measured in Mimir yet. The next
+probe should use UVC/KS or a deliberately chosen LeapUVC route and should record
+delivered stereo IR frames, device/embedded timestamps when available, and
+arrival jitter over the same five-second window.
diff --git a/state/evidence.jsonl b/state/evidence.jsonl
index 0d3f72b..f8405db 100644
--- a/state/evidence.jsonl
+++ b/state/evidence.jsonl
@@ -2,3 +2,4 @@
 {"ts":"2026-05-21T17:40:33+00:00","type":"decision","status":"ok","note":"Mimir live camera ingest should talk directly to drivers through IMimirVideoCaptureDriver: LeapUVC/libusb, LeapC images, Media Foundation, DirectShow, or GPU shared textures."}
 {"ts":"2026-05-21T18:55:00+00:00","type":"implementation","status":"ok","note":"Deleted script-era packages, tests, helper tools, dependency manifests, archived research mirrors, and stale docs from the working tree. The repo's live surface is C# Mimir.Runtime, Mimir.App, native reservoir, PowerShell bridge utilities, Aquarium, and Faust/native DSP."}
 {"ts":"2026-05-21T19:05:00+00:00","type":"correction","status":"ok","note":"Restored the research archive as reference-only memory. Research may preserve external examples and failed-path lessons, but live implementation must be rebuilt through direct drivers, native buffers, Aquarium GPU compute, and Faust/native DSP."}
+{"ts":"2026-05-21T19:30:00+00:00","type":"verification","status":"ok","note":"Raw PS3 Eye libusb/WinUSB cadence probe measured both cameras simultaneously at 320x240 requested 187 Hz: camera 0 delivered 915 frames in 5.005s (182.81 fps), camera 1 delivered 916 frames in 5.005s (183.01 fps). At 640x480 requested 60 Hz they delivered 58.69 fps and 57.09 fps. Leap remains unmeasured in raw UVC/KS mode."}
diff --git a/state/map.yaml b/state/map.yaml
index 924405c..9bac4a6 100644
--- a/state/map.yaml
+++ b/state/map.yaml
@@ -78,9 +78,11 @@ current_status:
     bridge scripts, and persistence surfaces. Script-era packages, tests,
     helper tools, dependency manifests, and stale docs have been removed from
     the working tree. Research archives remain as reference-only memory for raw
-    native/GPU implementation shape. The next useful cut is direct driver
-    ingest, not reviving old diagnostic machinery.
+    native/GPU implementation shape. A raw PS3 Eye libusb/WinUSB cadence probe
+    measured both PS3 Eyes simultaneously at about 183 fps each at 320x240 and
+    57-59 fps each at 640x480. Leap is present in LeapUVC/UVC mode but still
+    needs a raw UVC/KS cadence probe.
   next_action: >
-    Feed Leap stereo IR frames through `IMimirVideoCaptureDriver` into
-    `MimirSynchronizationHub`, measure sustained cadence over the default
-    five-second window, and expose the result in Aquarium runtime state.
+    Build the LeapUVC/UVC cadence probe, then turn the PS3 Eye raw USB probe
+    shape into an `IMimirVideoCaptureDriver` implementation that feeds measured
+    frames into `MimirSynchronizationHub`.