docs(phase-1): add validation strategy

.planning/phases/01-capture-and-classification/01-VALIDATION.md

@@ -0,0 +1,80 @@
+---
+phase: 1
+slug: capture-and-classification
+status: draft
+nyquist_compliant: false
+wave_0_complete: false
+created: 2026-03-25
+---
+
+# Phase 1 — Validation Strategy
+
+> Per-phase validation contract for feedback sampling during execution.
+
+---
+
+## Test Infrastructure
+
+| Property | Value |
+|----------|-------|
+| **Framework** | go test |
+| **Config file** | none — Wave 0 installs |
+| **Quick run command** | `go test ./...` |
+| **Full suite command** | `go test -v -race ./...` |
+| **Estimated runtime** | ~5 seconds |
+
+---
+
+## Sampling Rate
+
+- **After every task commit:** Run `go test ./...`
+- **After every plan wave:** Run `go test -v -race ./...`
+- **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 |
+|---------|------|------|-------------|-----------|-------------------|-------------|--------|
+| 01-01-01 | 01 | 1 | CAPT-01 | integration | `go test -run TestInterfaceFlag ./cmd/...` | ❌ W0 | ⬜ pending |
+| 01-01-02 | 01 | 1 | CAPT-02 | unit | `go test -run TestListInterfaces ./cmd/...` | ❌ W0 | ⬜ pending |
+| 01-01-03 | 01 | 1 | CAPT-04 | unit | `go test -run TestPrivilegeError ./internal/capture/...` | ❌ W0 | ⬜ pending |
+| 01-02-01 | 02 | 1 | CLAS-01 | unit | `go test -run TestClassify ./internal/classify/...` | ❌ W0 | ⬜ pending |
+| 01-02-02 | 02 | 1 | CLAS-03 | unit | `go test -run TestExitSummary ./internal/stats/...` | ❌ W0 | ⬜ pending |
+| 01-02-03 | 02 | 1 | CLAS-04 | unit | `go test -run TestVerboseLog ./internal/stats/...` | ❌ W0 | ⬜ pending |
+
+*Status: ⬜ pending · ✅ green · ❌ red · ⚠️ flaky*
+
+---
+
+## Wave 0 Requirements
+
+- [ ] `go.mod` — initialize Go module
+- [ ] Go 1.24+ installed on machine
+- [ ] Test file stubs for each requirement
+
+*If none: "Existing infrastructure covers all phase requirements."*
+
+---
+
+## Manual-Only Verifications
+
+| Behavior | Requirement | Why Manual | Test Instructions |
+|----------|-------------|------------|-------------------|
+| Live packet capture on real interface | CAPT-01 | Requires root/CAP_NET_RAW and active network | Run `sudo ./netsynth -i <iface>`, verify packets appear on stderr |
+| Platform-specific privilege message | CAPT-04 | OS-specific behavior, hard to unit test | Run without sudo on Linux and macOS, verify correct hint text |
+
+---
+
+## Validation Sign-Off
+
+- [ ] All tasks have `<automated>` verify or Wave 0 dependencies
+- [ ] Sampling continuity: no 3 consecutive tasks without automated verify
+- [ ] Wave 0 covers all MISSING references
+- [ ] No watch-mode flags
+- [ ] Feedback latency < 5s
+- [ ] `nyquist_compliant: true` set in frontmatter
+
+**Approval:** pending