docs(phase-6): add validation strategy

.planning/phases/06-config-package-and-sound-overrides/06-VALIDATION.md

@@ -0,0 +1,80 @@
+---
+phase: 06
+slug: config-package-and-sound-overrides
+status: draft
+nyquist_compliant: false
+wave_0_complete: false
+created: 2026-03-26
+---
+
+# Phase 06 — Validation Strategy
+
+> Per-phase validation contract for feedback sampling during execution.
+
+---
+
+## Test Infrastructure
+
+| Property | Value |
+|----------|-------|
+| **Framework** | go test (stdlib) |
+| **Config file** | none — tests use in-memory TOML strings |
+| **Quick run command** | `go test ./config/... -count=1` |
+| **Full suite command** | `go test ./... -count=1` |
+| **Estimated runtime** | ~2 seconds |
+
+---
+
+## Sampling Rate
+
+- **After every task commit:** Run `go test ./config/... -count=1`
+- **After every plan wave:** Run `go test ./... -count=1`
+- **Before `/gsd:verify-work`:** Full suite must be green
+- **Max feedback latency:** 2 seconds
+
+---
+
+## Per-Task Verification Map
+
+| Task ID | Plan | Wave | Requirement | Test Type | Automated Command | File Exists | Status |
+|---------|------|------|-------------|-----------|-------------------|-------------|--------|
+| 06-01-01 | 01 | 1 | CFG-01, CFG-04 | unit | `go test ./config/... -run TestParse` | ❌ W0 | ⬜ pending |
+| 06-01-02 | 01 | 1 | CFG-02, CFG-03 | unit | `go test ./config/... -run TestDiscover` | ❌ W0 | ⬜ pending |
+| 06-01-03 | 01 | 1 | CFG-05 | unit | `go test ./config/... -run TestUnknown` | ❌ W0 | ⬜ pending |
+| 06-02-01 | 02 | 2 | CFG-01, CFG-04 | integration | `go test ./... -run TestRunSynthesis` | ❌ W0 | ⬜ pending |
+| 06-02-02 | 02 | 2 | CFG-03 | integration | `go test ./cmd/... -run TestConfig` | ❌ W0 | ⬜ pending |
+
+*Status: ⬜ pending · ✅ green · ❌ red · ⚠️ flaky*
+
+---
+
+## Wave 0 Requirements
+
+- [ ] `config/config_test.go` — stubs for parse, discover, validate, merge tests
+- [ ] Existing `go test` infrastructure covers all phase requirements
+
+*Existing test infrastructure (go test) covers all phase requirements. New test files created alongside implementation.*
+
+---
+
+## Manual-Only Verifications
+
+| Behavior | Requirement | Why Manual | Test Instructions |
+|----------|-------------|------------|-------------------|
+| Auto-discover from `~/.config/netsynth/config.toml` | CFG-02 | Requires real home directory | Create config in `~/.config/netsynth/`, run netsynth, verify it loads |
+| Ctrl+C after config load | CFG-01 | End-to-end with capture | Load config, start capture, Ctrl+C, verify MP3 uses overridden frequency |
+
+*Most behaviors have automated verification via unit tests with in-memory TOML.*
+
+---
+
+## 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 < 2s
+- [ ] `nyquist_compliant: true` set in frontmatter
+
+**Approval:** pending