--- phase: 03.1-remove-virtual-tracker verified: 2026-03-22T10:45:00Z status: passed score: 5/5 success criteria verified re_verification: false gaps: [] human_verification: - test: "Run updated driver in SteamVR and confirm no device appears in headset device list" expected: "Only HMD visible; no 'Beyond Proximity Sensor' tracker in device list" why_human: "SteamVR device list UI cannot be verified programmatically. Hardware approval already confirmed by user." --- # Phase 03.1: Remove Virtual Tracker — Verification Report **Phase Goal:** Driver runs without registering a GenericTracker device — proximity triggers HMD standby/wake via direct HMD property write only **Verified:** 2026-03-22T10:45:00Z **Status:** PASSED **Re-verification:** No — initial verification **Hardware validation:** APPROVED by user prior to this verification run (all 5 success criteria confirmed on real hardware) --- ## Goal Achievement ### Observable Truths | # | Truth | Status | Evidence | |---|-------|--------|----------| | 1 | No `TrackedDeviceAdded` call exists in the driver | VERIFIED | `grep` over all `src/` files returns zero matches for `TrackedDeviceAdded` | | 2 | `SetBoolProperty(Prop_ContainsProximitySensor_Bool)` on HMD container is the sole proximity mechanism | VERIFIED | `device_provider.cpp` lines 197-214: `SetHmdProximity()` calls `VRProperties()->SetBoolProperty(hmdProps, vr::Prop_ContainsProximitySensor_Bool, on)` — no other mechanism present | | 3 | Named pipe commands (proximity on/off, status, fallback1 on/off) call SetHmdProximity | VERIFIED | `HandlePipeCommand` lines 140-165: five branches, all routing to `SetHmdProximity()` or status format `"proximity=%s hid=%s"` | | 4 | HID device open still occurs in `Init()` | VERIFIED | `device_provider.cpp` lines 22-36: `hid_init()` + `m_pHidDevice->Open(0x35BD, 0x0101)` with graceful degradation path | | 5 | `ProximityDevice` class and `ITrackedDeviceServerDriver` implementation removed | VERIFIED | `src/driver/` contains only `device_provider.h`, `device_provider.cpp`, `driverlog.h`, `driverlog.cpp`, `hmd_driver_factory.cpp` — no `proximity_device.*` files exist on disk | **Score:** 5/5 truths verified --- ### Required Artifacts | Artifact | Expected | Status | Details | |----------|----------|--------|---------| | `src/driver/proximity_device.h` | DELETED | VERIFIED ABSENT | File does not exist on disk | | `src/driver/proximity_device.cpp` | DELETED | VERIFIED ABSENT | File does not exist on disk | | `src/driver/device_provider.h` | DeviceProvider with `bool m_bProximity`, `SetHmdProximity`, no ProximityDevice | VERIFIED | Lines 26-27: `bool m_bProximity = false` and `void SetHmdProximity(bool on)` present; no `ProximityDevice` forward declaration or member | | `src/driver/device_provider.cpp` | HMD property write via `SetBoolProperty`, no tracker registration, pipe commands wired | VERIFIED | `SetBoolProperty` at line 210; no `TrackedDeviceAdded`; `HandlePipeCommand` routes all 5 commands correctly | | `src/ctl/main.cpp` | CLI with proximity on/off, status, fallback1 on/off only; no fallback2/3 | VERIFIED | Lines 39-43: validation chain has exactly 5 valid commands; `PrintUsage` lists exactly those 5; no `fallback2` or `fallback3` anywhere in file | | `CMakeLists.txt` | Build without `proximity_device` source entries | VERIFIED | `add_library` block (lines 38-46) contains no `proximity_device` entries; `device_provider.h` and `device_provider.cpp` present | | `build/.../driver_beyond_proximity.dll` | Build artifact | VERIFIED | File exists at `build/driver/beyond_proximity/bin/win64/driver_beyond_proximity.dll` | | `build/.../beyond_prox_ctl.exe` | Build artifact | VERIFIED | File exists at `build/driver/beyond_proximity/bin/win64/beyond_prox_ctl.exe` | | `scripts/verify_proximity.ps1` | 12-check script for Phase 03.1 behavior | VERIFIED | Script contains `TrackedDeviceAdded` (negative check), `ContainsProximitySensor`, `fallback1 on`, `hid=`, `Phase 03.1 Success Criteria`; no `FEAS-03` | --- ### Key Link Verification | From | To | Via | Status | Details | |------|----|-----|--------|---------| | `device_provider.cpp` | `VRProperties()->SetBoolProperty` | `HandlePipeCommand` calls `SetHmdProximity()` | WIRED | `HandlePipeCommand` lines 142, 147, 158, 163 all call `SetHmdProximity()`; `SetHmdProximity` calls `SetBoolProperty(..., Prop_ContainsProximitySensor_Bool, on)` at line 210 | | `device_provider.cpp` | `HidDevice` | `Init()` opens HID device | WIRED | `m_pHidDevice = std::make_unique()` at line 30; `m_pHidDevice->Open(0x35BD, 0x0101)` at line 31 | | `device_provider.cpp` | `SetHmdProximity(true)` on startup | `Init()` calls after `CreatePipeServer()` | WIRED | Line 43: `SetHmdProximity(true)` — `m_bProximity` initializes to `false` so the state-change guard passes on first call | | `scripts/verify_proximity.ps1` | `beyond_prox_ctl.exe` | CLI invocation for pipe command testing | WIRED | Lines 116, 129, 140, 155, 168: `Start-Process -FilePath $CtlPath` with each command as argument | | `scripts/verify_proximity.ps1` | `vrserver.txt` log parsing | Pattern `Proximity:.*SetBoolProperty.*ContainsProximitySensor` | WIRED | Lines 83, 187-188: both startup check and post-toggle tail check use the correct pattern | --- ### Requirements Coverage No requirement IDs were assigned to this phase (cleanup/refactor phase). All five Phase 03.1 success criteria were verified above and confirmed on hardware. --- ### Anti-Patterns Found No anti-patterns detected. Scanned files: `src/driver/device_provider.h`, `src/driver/device_provider.cpp`, `src/ctl/main.cpp`, `CMakeLists.txt`, `scripts/verify_proximity.ps1` - Zero TODO/FIXME/HACK/placeholder comments in any `.cpp` file under `src/` - No stub return patterns (`return null`, `return {}`, empty handlers) - `SetHmdProximity()` is a complete, substantive implementation (state guard + property container lookup + SetBoolProperty + log) - State-change guard (`if (on == m_bProximity) return`) is correct: `m_bProximity` initializes to `false`, so the `SetHmdProximity(true)` call in `Init()` always passes through on first invocation --- ### Human Verification Required #### 1. No tracker in SteamVR device list (SC-1) **Test:** Install updated DLL to SteamVR driver directory, restart SteamVR, inspect device list in SteamVR settings. **Expected:** No "Beyond Proximity Sensor" or any extra tracker device appears. **Why human:** SteamVR device list UI is not programmatically accessible. **Note:** User has already confirmed this passes on real hardware. #### 2. HMD standby/wake behavior (SC-2) **Test:** Run `beyond_prox_ctl "proximity off"`, wait 30s motionless; then `beyond_prox_ctl "proximity on"`. **Expected:** Dashboard does not reset on `proximity off`; HMD standby/wake cycles correctly. **Why human:** SteamVR standby/wake behavior depends on runtime HMD state transitions not visible in logs. **Note:** User has already confirmed this passes on real hardware. --- ### Gaps Summary No gaps. All five success criteria are verified in the codebase and were confirmed on real hardware by the user prior to this verification run. --- ## Detailed Findings ### SC-1: No TrackedDeviceAdded Confirmed absent: grep over entire `src/` tree returns zero matches for `TrackedDeviceAdded`. The `proximity_device.h` and `proximity_device.cpp` files that contained the `ITrackedDeviceServerDriver` implementation are deleted. `CMakeLists.txt` no longer lists them. ### SC-2: SetBoolProperty on HMD container (fallback1 behavior preserved) `SetHmdProximity()` in `device_provider.cpp` lines 197-214 is a direct promotion of the former `TryFallback1` implementation. It: 1. Guards against redundant calls with `m_bProximity` state 2. Calls `VRProperties()->TrackedDeviceToPropertyContainer(vr::k_unTrackedDeviceIndex_Hmd)` to get HMD container 3. Calls `VRProperties()->SetBoolProperty(hmdProps, vr::Prop_ContainsProximitySensor_Bool, on)` 4. Logs with pattern `"Proximity: SetBoolProperty(HMD, ContainsProximitySensor, ...)"` matching the verification script check ### SC-3: Pipe commands work `HandlePipeCommand` handles all five required commands: - `"proximity on"` → `SetHmdProximity(true)` → responds `"OK proximity=true"` - `"proximity off"` → `SetHmdProximity(false)` → responds `"OK proximity=false"` - `"status"` → responds `"proximity=%s hid=%s"` using `m_bProximity` and `m_pHidDevice` state - `"fallback1 on"` → `SetHmdProximity(true)` → responds `"OK fallback1=on (SetBoolProperty on HMD)"` - `"fallback1 off"` → `SetHmdProximity(false)` → responds `"OK fallback1=off"` ### SC-4: HID device open `Init()` lines 22-36: `hid_init()` called, then `HidDevice::Open(0x35BD, 0x0101)`. If open fails, `m_pHidDevice.reset()` is called and driver continues (graceful degradation). Status command correctly reports `hid=open` or `hid=closed` based on `m_pHidDevice` being non-null. ### SC-5: ProximityDevice class removed `src/driver/` directory listing confirms: `device_provider.cpp`, `device_provider.h`, `driverlog.cpp`, `driverlog.h`, `hmd_driver_factory.cpp` — exactly the five expected files, no `proximity_device.*`. Grep for `ProximityDevice` across all `src/` returns zero matches. --- _Verified: 2026-03-22T10:45:00Z_ _Verifier: Claude (gsd-verifier)_