---
phase: 8
slug: robustness-and-logging
status: complete
nyquist_compliant: true
wave_0_complete: true
created: 2026-03-22
updated: 2026-03-23
---

# Phase 8 — Validation Strategy

> Per-phase validation contract for feedback sampling during execution.

---

## Test Infrastructure

| Property | Value |
|----------|-------|
| **Framework** | PowerShell verification scripts |
| **Config file** | none |
| **Quick run command** | `powershell -ExecutionPolicy Bypass -File scripts/verify_phase08.ps1` |
| **Full suite command** | `powershell -ExecutionPolicy Bypass -File scripts/verify_phase08.ps1` |
| **Estimated runtime** | ~5 seconds |

---

## Sampling Rate

- **After every task commit:** Run `powershell -ExecutionPolicy Bypass -File scripts/verify_phase08.ps1`
- **After every plan wave:** Run full verification
- **Before `/gsd:verify-work`:** Full suite must be green
- **Max feedback latency:** 5 seconds

---

## Per-Task Verification Map

| Task ID | Plan | Wave | Requirement | Test Type | Automated Command | File Exists | Status |
|---------|------|------|-------------|-----------|-------------------|-------------|--------|
| 08-01-01 | 01 | 1 | RBST-01..04 | build + source | `cmake --build build --config Release` + source grep for null guards | yes | green |
| 08-02-01 | 02 | 1 | RBST-01..04 | source + log | `verify_phase08.ps1` full suite | yes | green |
| 08-02-02 | 02 | 1 | RBST-04 | manual | Hardware crash-safety checkpoint | n/a | green |

---

## Wave 0 Requirements

Existing infrastructure covers all phase requirements. `scripts/verify_phase08.ps1` checks null guards, safe arithmetic, graceful degradation, logging format, and state-change logging via source analysis and vrserver log.

---

## Manual-Only Verifications

| Behavior | Requirement | Why Manual | Test Instructions |
|----------|-------------|------------|-------------------|
| Driver survives USB disconnect during active read | RBST-04 | Requires physical cable disconnect during operation | Start SteamVR with driver, unplug USB mid-read, verify vrserver.exe does not crash |

---

## Validation Sign-Off

- [x] All tasks have `<automated>` verify or Wave 0 dependencies
- [x] Sampling continuity: no 3 consecutive tasks without automated verify
- [x] Wave 0 covers all MISSING references
- [x] No watch-mode flags
- [x] Feedback latency < 5s
- [x] `nyquist_compliant: true` set in frontmatter

**Approval:** passed

## Validation Audit 2026-03-23

| Metric | Count |
|--------|-------|
| Gaps found | 0 |
| Resolved | 0 |
| Escalated | 0 |