yoloyolo/.planning/milestones/v1.1-phases/06-config-package-and-sound-overrides/06-VERIFICATION.md

---
phase: 06-config-package-and-sound-overrides
verified: 2026-03-26T20:15:00Z
status: passed
score: 10/10 must-haves verified
re_verification: false
---

# Phase 6: Config Package and Sound Overrides Verification Report

**Phase Goal:** Users can create a TOML config file to override frequency and waveform per traffic class, with auto-discovery, partial override semantics, and clear validation errors
**Verified:** 2026-03-26T20:15:00Z
**Status:** passed
**Re-verification:** No — initial verification

## Goal Achievement

### Observable Truths

| #  | Truth                                                                               | Status     | Evidence                                                                                   |
|----|-------------------------------------------------------------------------------------|------------|--------------------------------------------------------------------------------------------|
| 1  | Load with explicit path to valid TOML returns merged config map with overrides applied | ✓ VERIFIED | TestLoadPartialOverrideFrequency, TestLoadBothOverrides — PASS                             |
| 2  | Load with no config file found returns default ClassFreqConfigs unchanged            | ✓ VERIFIED | TestLoadNoConfig (t.Chdir to empty tmpdir) — PASS                                          |
| 3  | Load with unknown TOML key returns error naming the bad key                          | ✓ VERIFIED | TestLoadUnknownKey ("frequncy") — PASS; error contains the typo'd key name                 |
| 4  | Load with partial override (only frequency set) leaves waveform unchanged            | ✓ VERIFIED | TestLoadPartialOverrideFrequency — WaveformType remains WaveformCustom — PASS              |
| 5  | Load with partial override (only waveform set) leaves frequency unchanged            | ✓ VERIFIED | TestLoadPartialOverrideWaveform — BaseHz remains 65.0 — PASS                              |
| 6  | Load with unknown class name logs warning and does not error                         | ✓ VERIFIED | TestLoadUnknownClass (BOGUS class) — err == nil, 14 entries, warning to stderr — PASS      |
| 7  | User passes --config /path/to/file.toml and tool uses that file for sound overrides  | ✓ VERIFIED | config.Load(configPath) called in run() at line 87; flows to RunSynthesis and NewBank      |
| 8  | User passes --config /nonexistent.toml and tool exits with clear error before capture | ✓ VERIFIED | Tested live: `go run ./cmd/netsynth --config /nonexistent/file.toml` exits 1 with "config file not found: /nonexistent/file.toml" |
| 9  | User runs without --config and auto-discovery kicks in (or defaults used silently)   | ✓ VERIFIED | discoverPath() checks ./netsynth.toml then XDG dir; silent default on no-find             |
| 10 | RunSynthesis uses the merged config map instead of hardcoded ClassFreqConfigs        | ✓ VERIFIED | encode/mp3.go line 58: `synth.NewBank(1.0, freqCfgs)` — no reference to ClassFreqConfigs  |

**Score:** 10/10 truths verified

### Required Artifacts

| Artifact                | Expected                                          | Status     | Details                                                                |
|-------------------------|---------------------------------------------------|------------|------------------------------------------------------------------------|
| `config/config.go`      | Load function, parse, validate, merge, discover   | ✓ VERIFIED | 184 lines; exports Load, SoundOverride, rawConfig; all functions present |
| `config/config_test.go` | Table-driven tests for CFG-01 through CFG-05      | ✓ VERIFIED | 181 lines; 9 test functions (TestLoad*); all 9 pass                    |
| `cmd/netsynth/main.go`  | --config flag, config.Load call, freqCfgs to RunSynthesis | ✓ VERIFIED | configPath var, flag registration, config.Load at line 87, two RunSynthesis call sites updated |
| `encode/mp3.go`         | RunSynthesis with freqCfgs parameter              | ✓ VERIFIED | Signature: `func RunSynthesis(..., freqCfgs map[classify.TrafficClass]synth.FreqConfig) error` |
| `encode/mp3_test.go`    | Updated tests for new RunSynthesis signature      | ✓ VERIFIED | Three call sites pass `synth.ClassFreqConfigs` as third arg            |

### Key Link Verification

| From                      | To                        | Via                                              | Status     | Details                                                   |
|---------------------------|---------------------------|--------------------------------------------------|------------|-----------------------------------------------------------|
| `config/config.go`        | `synth/config.go`         | synth.FreqConfig, ClassFreqConfigs, WaveformPresetHarmonics | ✓ WIRED    | grep confirmed all three at lines 46, 147-148, 172, 178   |
| `config/config.go`        | `classify/types.go`       | classify.TrafficClass (AllClasses implied)        | ✓ WIRED    | Line 161: `classify.TrafficClass(className)` confirmed     |
| `config/config.go`        | `github.com/BurntSushi/toml` | toml.DecodeFile, md.Undecoded()                | ✓ WIRED    | Lines 104 and 115 confirmed; dependency in go.mod         |
| `cmd/netsynth/main.go`    | `config/config.go`        | config.Load(configPath)                          | ✓ WIRED    | Line 87: `freqCfgs, err := config.Load(configPath)`       |
| `cmd/netsynth/main.go`    | `encode/mp3.go`           | encode.RunSynthesis(snapshots, outputPath, freqCfgs) | ✓ WIRED    | Lines 157 and 225 — both runLiveMode and runPcapMode      |
| `encode/mp3.go`           | `synth/bank.go`           | synth.NewBank(1.0, freqCfgs) using passed-in config | ✓ WIRED    | Line 58: `synth.NewBank(1.0, freqCfgs)` — no hardcoding  |

### Data-Flow Trace (Level 4)

| Artifact              | Data Variable | Source                        | Produces Real Data | Status      |
|-----------------------|---------------|-------------------------------|--------------------|-------------|
| `config/config.go`    | result map    | synth.ClassFreqConfigs + TOML overrides | Yes — copies from ClassFreqConfigs (14 entries), overlays TOML | ✓ FLOWING   |
| `encode/mp3.go`       | freqCfgs      | Injected from config.Load     | Yes — passed in from caller, not hardcoded | ✓ FLOWING   |
| `cmd/netsynth/main.go`| freqCfgs      | config.Load(configPath) return | Yes — real config.Load result, error-guarded | ✓ FLOWING   |

### Behavioral Spot-Checks

| Behavior                                           | Command                                                       | Result                                              | Status  |
|----------------------------------------------------|---------------------------------------------------------------|-----------------------------------------------------|---------|
| `--config` flag appears in CLI help                | `go run ./cmd/netsynth --help`                                | `--config string   Path to TOML config file (default: auto-discover)` | ✓ PASS  |
| Explicit --config missing file errors before capture | `go run ./cmd/netsynth --config /nonexistent/file.toml --read /dev/null` | exit 1, "config file not found: /nonexistent/file.toml" | ✓ PASS  |
| All 9 config package tests pass                    | `go test ./config/... -count=1 -v`                            | All 9 TestLoad* PASS                                | ✓ PASS  |
| Full test suite green                              | `go test ./... -count=1`                                      | 7 packages all ok                                   | ✓ PASS  |
| Binary builds and vets clean                       | `go build ./... && go vet ./...`                               | BUILD OK, VET OK                                    | ✓ PASS  |

### Requirements Coverage

| Requirement | Source Plan | Description                                                            | Status      | Evidence                                                         |
|-------------|-------------|------------------------------------------------------------------------|-------------|------------------------------------------------------------------|
| CFG-01      | 06-01       | User can create a TOML config file that overrides default sound mappings | ✓ SATISFIED | config.Load + merge; TestLoadPartialOverrideFrequency PASS       |
| CFG-02      | 06-01       | Tool auto-discovers config from ./netsynth.toml or ~/.config/netsynth/config.toml (silent if absent) | ✓ SATISFIED | discoverPath(); TestLoadNoConfig PASS (t.Chdir to empty dir)     |
| CFG-03      | 06-02       | User can specify explicit config path via --config flag (error if missing) | ✓ SATISFIED | --config flag registered; config.Load returns "not found" error  |
| CFG-04      | 06-01       | User can override individual values without replicating entire default config | ✓ SATISFIED | Pointer fields (*float64, *string); TestLoadPartialOverrideWaveform PASS |
| CFG-05      | 06-01       | Unknown keys in config file produce a clear error with the typo'd key name | ✓ SATISFIED | md.Undecoded() + keyPath extraction; TestLoadUnknownKey PASS     |

All 5 requirement IDs from both PLAN frontmatter entries (CFG-01, CFG-02, CFG-04, CFG-05 from 06-01; CFG-03 from 06-02) are satisfied with evidence.

**Orphaned requirements check:** REQUIREMENTS.md traceability table maps CFG-01 through CFG-05 to Phase 6. All 5 are claimed and verified. No orphans.

### Anti-Patterns Found

| File               | Line | Pattern           | Severity | Impact  |
|--------------------|------|-------------------|----------|---------|
| `go.mod`           | 14   | BurntSushi/toml marked `// indirect` despite being a direct import in config/config.go | Info | None functional — `go mod tidy` corrects it; does not affect build or tests |

No placeholders, stub functions, hardcoded empty returns, or TODO markers found in any phase 6 modified files.

### Human Verification Required

No items require human verification. All functional behaviors were confirmed programmatically:
- Config loading, merging, and validation verified via unit tests.
- CLI flag confirmed in help output.
- Error-before-capture behavior confirmed via live CLI invocation.

### Gaps Summary

No gaps. All 10 observable truths verified, all 5 artifacts substantive and wired, all 6 key links confirmed, all 5 requirements satisfied. The single info-level finding (BurntSushi/toml marked indirect in go.mod) is a trivial go module hygiene item — `go mod tidy` resolves it and it has no impact on correctness or functionality.

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_Verified: 2026-03-26T20:15:00Z_
_Verifier: Claude (gsd-verifier)_