yoloyolo/.planning/phases/11-synthesis-and-config-layer/11-VERIFICATION.md

phase, verified, status, score, human_verification

phase	verified	status	score	human_verification
11-synthesis-and-config-layer	2026-03-27T15:41:00Z	human_needed	11/11 must-haves verified	test expected why_human Run `go build -o /tmp/netsynth . && /tmp/netsynth --print-config | head -5` and listen to an output MP3 generated with mixed traffic types Each traffic class group (Infrastructure, Web, Mail, etc.) produces a perceptually distinct timbre — Triangle waveforms sound softer/bell-like vs Square waveforms (buzzy/hollow) vs Sawtooth (bright/reedy) vs Sine (pure tone) Perceptual audio quality and family coherence ('distinct, family-coherent sound') requires a human listening test; automated tests only verify Hz/waveform parameters and group metadata, not the sonic result

Phase 11: Synthesis and Config Layer Verification Report

Phase Goal: Every new traffic class produces a distinct, family-coherent sound and --print-config shows all classes organized by group with section headers Verified: 2026-03-27T15:41:00Z Status: human_needed (all automated checks pass; perceptual audio quality requires human listening test) Re-verification: No — initial verification

Goal Achievement

Observable Truths

#	Truth	Status	Evidence
1	ClassFreqConfigs has exactly 35 entries matching AllClasses()	VERIFIED	grep -c "classify\.Class" synth/config.go = 35; --print-config emits 35 [sounds.*] entries; TestAllClassesCount passes with want 35
2	Every new class has correct Hz, waveform, pan, and group from frequency allocation table	VERIFIED	All 21 new entries confirmed in synth/config.go (lines 168-369) with exact Hz, WaveformType, Pan, Group values matching the plan spec; go test ./synth/... passes
3	LDAP, Kerberos, Syslog appear in AllClasses() and have Infrastructure group with Triangle waveform	VERIFIED	classify/types.go line 69: ClassLDAP, ClassKerberos, ClassSyslog in AllClasses(); synth/config.go lines 349-369: all three have WaveformType: WaveformTriangle and Group: "Infrastructure"
4	go test ./synth/... ./classify/... ./config/... all pass	VERIFIED	go test ./... all 7 packages pass (confirmed by fresh run)
5	PrintConfig output groups classes by family with section header comments	VERIFIED	--print-config binary output shows # Infrastructure, # Web, # Mail, # Remote Access, # File Transfer, # Database, # VoIP, # Unknown headers in canonical order
6	Groups appear in canonical order: Infrastructure, Web, Mail, Remote Access, File Transfer, Database, Discovery, VoIP, Unknown	VERIFIED	TestPrintConfigGroupHeaders passes; binary spot-check confirms order matches groupOrder slice in config.go line 284
7	Within each group, classes are sorted by ascending BaseHz	VERIFIED	PrintConfig spot-check output shows ascending Hz within each group (e.g., Infrastructure: 65, 73, 82, 93, 105, 118, 133, 2950, 3050, 3250); sort.Slice by BaseHz confirmed in config.go lines 334-339
8	User-defined classes appear under a User-defined section header after all built-in groups	VERIFIED	config.go lines 399-419 emit # User-defined section; # User-defined string present in source
9	Users can define [groups] in TOML to reassign a class to a different group	VERIFIED	TestLoadGroupOverride and TestPrintConfigGroupReassignment both pass; applyGroupOverrides called in Load() at line 103 after merge()
10	Unknown class names in [groups] produce a warning, not an error	VERIFIED	TestLoadGroupUnknownClass passes; test output shows Warning: config: [groups]: unknown class "BOGUS" (ignored) on stderr
11	Group reassignment only affects PrintConfig grouping, not frequency or waveform	VERIFIED	TestLoadGroupOverride asserts cfg.BaseHz == defaultCfg.BaseHz (unchanged); applyGroupOverrides only mutates cfg.Group, not BaseHz or WaveformType

Score: 11/11 truths verified (automated); 1 truth requires human verification (perceptual audio quality)

Required Artifacts

Artifact	Expected	Status	Details
synth/config.go	21 new ClassFreqConfigs entries	VERIFIED	35 total entries; all 21 new classes present with correct values per allocation table
classify/types.go	AllClasses() returns 35 entries including LDAP/Kerberos/Syslog	VERIFIED	35-entry return slice; LDAP/Kerberos/Syslog added to Infrastructure section at line 69
config/config.go	Group-ordered PrintConfig, [groups] TOML support, applyGroupOverrides function	VERIFIED	groupOrder slice (line 284), applyGroupOverrides function (line 270), rawConfig.Groups field (line 41), called in Load() (line 103)
config/config_test.go	Tests for group headers, group reassignment, unknown class warning	VERIFIED	4 new test functions at lines 605-692: TestPrintConfigGroupHeaders, TestLoadGroupOverride, TestLoadGroupUnknownClass, TestPrintConfigGroupReassignment — all pass

Key Link Verification

From	To	Via	Status	Details
config/config.go	synth/config.go	PrintConfig reads FreqConfig.Group field	WIRED	cfg.Group used at lines 329, 364; FreqConfig.Group drives group bucketing in builtinByGroup map
config/config.go	classify/types.go	PrintConfig iterates AllClasses() and groups by Group field	WIRED	classify.AllClasses() called at lines 326 and 362; iteration drives builtinByGroup construction and customGroups scan
synth/config.go	classify/types.go	ClassFreqConfigs references TrafficClass constants	WIRED	All 35 map keys use classify.Class* constants; pattern `classify.Class(IMAP

Data-Flow Trace (Level 4)

Artifact	Data Variable	Source	Produces Real Data	Status
config/config.go PrintConfig	builtinByGroup	classify.AllClasses() + result.FreqCfgs[cls]	Yes — 35 real entries from copyDefaults() which copies synth.ClassFreqConfigs	FLOWING
config/config.go PrintConfig	result.FreqCfgs	Load() → copyDefaults() → merge() → applyGroupOverrides()	Yes — real map with 35 entries, plus any user overrides applied	FLOWING

Behavioral Spot-Checks

Behavior	Command	Result	Status
--print-config emits group headers	/tmp/netsynth_test --print-config | grep "^# [A-Z]"	Infrastructure, Web, Mail, Remote Access, File Transfer, Database, VoIP, Unknown all present	PASS
35 sound entries emitted	/tmp/netsynth_test --print-config | grep "^\[sounds\." | wc -l	35	PASS
Classes sorted ascending within group	Infrastructure group: 65, 73, 82, 93, 105, 118, 133, 2950, 3050, 3250 Hz	Correct ascending order	PASS
go test ./... passes all packages	go test ./...	7 packages ok	PASS
Perceptual audio quality	Requires listening to generated MP3	Cannot verify programmatically	SKIP (human_needed)

Requirements Coverage

Requirement	Source Plan	Description	Status	Evidence
GRP-02	11-01-PLAN.md, 11-02-PLAN.md	--print-config output organizes classes by group with section headers	SATISFIED	TestPrintConfigGroupHeaders passes; binary spot-check confirms group headers in canonical order; config.go groupOrder drives emission order
GRP-03	11-01-PLAN.md, 11-02-PLAN.md	Users can define [groups] in TOML config to reassign protocols to different sound families	SATISFIED	rawConfig.Groups field parses [groups] TOML; applyGroupOverrides wired into Load(); TestLoadGroupOverride and TestPrintConfigGroupReassignment both pass

No orphaned requirements — both GRP-02 and GRP-03 are claimed by both plans and satisfied by implementation.

Anti-Patterns Found

File	Line	Pattern	Severity	Impact
None found	—	—	—	—

No TODO/FIXME/placeholder comments, no empty handlers, no stub return values in phase-modified files. The return []HarmonicDef{{Ratio: 1, Amplitude: 1.0}} in WaveformSine case is the legitimate single-harmonic definition, not a stub.

Hardcoded count audit:

• grep "want 14" config/config_test.go — no matches
• grep "want 32" classify/classifier_test.go — no matches
• grep "!= 14" synth/bank_test.go — no matches
• TestNewBankHas14Layers renamed to TestNewBankHasAllLayers

Human Verification Required

1. Perceptual Audio Quality — Family-Coherent Distinct Sounds

Test: Build the binary (go build -o /tmp/netsynth .), run it against a live interface or a pcap file, and listen to the output MP3. Alternatively, generate a test clip exercising multiple classes using a synthetic pcap.

Expected: Traffic classes within the same family share a recognizable waveform timbre:

• Infrastructure classes (ICMP, DNS, DHCP, LDAP, etc.) — gentle bell-like quality from Triangle waveform
• Remote Access and File Transfer classes (SSH, RDP, FTP, SMB, etc.) — buzzy/hollow timbre from Square waveform
• Database classes (MySQL, PostgreSQL, Redis, MongoDB) — bright/reedy timbre from Sawtooth waveform
• SIP (VoIP) — pure clean tone from Sine waveform
• Different families should sound clearly distinct from one another while classes within a family are recognizably related

Why human: Perceptual audio quality (timbre coherence, distinctness under real traffic loads, absence of clashing frequencies) cannot be verified programmatically. The code correctly implements the waveform types and Hz values, but whether the resulting sound is perceptually "family-coherent" as described in the phase goal requires a human ears-on test.

Gaps Summary

No gaps. All automated must-haves pass. The only pending item is a human listening test for perceptual audio quality (Success Criterion 2 from the phase scope, flagged at verification request time).

Commit trail verified:

• 1556ce8 — feat(11-01): add 21 ClassFreqConfigs entries and include LDAP/Kerberos/Syslog in AllClasses()
• 35d8915 — fix(11-01): update hardcoded count assertions to reflect 35 traffic classes
• 374282e — feat(11-02): add [groups] TOML support and group-ordered PrintConfig
• 7bf3ea1 — test(11-02): add group header and reassignment tests (GRP-02, GRP-03)

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Verified: 2026-03-27T15:41:00Z Verifier: Claude (gsd-verifier)