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yoloyolo/.planning/phases/03-pipeline-integration-and-mvp/03-VERIFICATION.md
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phase, verified, status, score, re_verification, human_verification
phase verified status score re_verification human_verification
03-pipeline-integration-and-mvp 2026-03-26T00:00:00Z human_needed 9/9 must-haves verified false
test expected why_human
Run netsynth on loopback, generate traffic, press Ctrl+C, inspect MP3 Valid non-zero MP3 at specified path; stderr shows protocol summary, then 'Encoding N windows to <path>...', then 'Saved <path> (Xs, N KB, encoded in Xs)' Live capture requires CAP_NET_RAW privileges and real packet traffic; ffprobe validation of produced MP3 cannot be done without running the binary against a live interface
test expected why_human
Run netsynth on loopback and immediately press Ctrl+C before any traffic Error message like 'synthesis failed: no packets captured...'; no output file created at specified path Zero-packet path requires confirming no file is left on disk, which requires executing the binary

Phase 03: Pipeline Integration and MVP Verification Report

Phase Goal: Wire capture into synthesis, Ctrl+C with valid MP3 output, auto-clustering of unknown traffic Verified: 2026-03-26 Status: human_needed — all automated checks pass; live end-to-end MP3 production needs human testing Re-verification: No — initial verification

Goal Achievement

Observable Truths (Plan 03-01: CLAS-02)

# Truth Status Evidence
1 AllClasses() returns exactly 14 classes with no ClassUnknown VERIFIED classify/types.go lines 18-29: 14 constants, no bare "unknown" constant; TestAllClassesCount asserts exactly 14
2 Unrecognized TCP/UDP packets are deterministically assigned to ClassUnknown1-4 via hash-bucketing VERIFIED classify/classifier.go lines 80-101: hashBucket() with formula (dstPort*31 + protoNum*7) % 4; TestHashBucketDistribution passes
3 Packets with no transport layer (ARP etc.) are assigned to an unknown bucket, not silently dropped VERIFIED classifier.go line 73: result.Class = hashBucket(result.DstPort, result.Protocol) on the no-transport-layer path; TestClassifyUnknown (ARP packet) passes
4 Each unknown bucket has a distinct tone in the 850-1100 Hz dissonant range VERIFIED synth/config.go lines 43-46: ClassUnknown1=862 Hz, ClassUnknown2=920 Hz, ClassUnknown3=981 Hz, ClassUnknown4=1047 Hz; TestFrequenciesInRange and TestFrequenciesUnique pass
5 GainPerLayer is 1/14 so 14 layers mix without clipping VERIFIED synth/config.go line 10: GainPerLayer = 1.0 / float64(NumLayers) where NumLayers = 14; TestMixerNoClip passes with all 14 classes at count=1000

Observable Truths (Plan 03-02: CAPT-03)

# Truth Status Evidence
6 User runs netsynth -i <iface> -o out.mp3, generates traffic, presses Ctrl+C, receives a valid playable MP3 HUMAN_NEEDED encode.RunSynthesis is wired in main.go line 110 and build succeeds; live MP3 playability needs human test
7 Protocol summary prints to stderr BEFORE encoding begins VERIFIED main.go line 105: aggregate.PrintSummary at line 105 before encode.RunSynthesis at line 110
8 User sees "Encoding N windows to ..." status message during encoding VERIFIED main.go line 108: fmt.Fprintf(os.Stderr, "Encoding %d windows to %s...\n", ...)
9 User sees "Saved (Xs, N KB, encoded in Xs)" confirmation after encoding VERIFIED main.go lines 121-122: fmt.Fprintf(os.Stderr, "Saved %s (%.1fs, %d KB, encoded in %.1fs)\n", ...)
10 Zero-packet captures produce an error message, not a corrupt file VERIFIED encode/mp3.go lines 48-53: zero-packet guard runs before os.Create, returns error before any file is written

Score: 9/9 automated truths verified; 1 truth (live MP3 production) needs human confirmation

Required Artifacts

Plan 03-01 Artifacts

Artifact Expected Status Details
classify/types.go ClassUnknown1-4 constants, 14-element AllClasses() VERIFIED Lines 18-31: 4 constants plus AllClasses() returning 14-element slice
classify/classifier.go hashBucket() function routing unrecognized traffic VERIFIED Lines 80-101: func hashBucket(dstPort uint16, protocol string) TrafficClass
synth/config.go FreqConfig entries for all 14 classes, NumLayers=14 VERIFIED Line 9: NumLayers = 14; lines 31-46: 14 entries in ClassFreqConfigs
synth/config_test.go TestClassFreqConfigsComplete and TestNumLayersMatchesAllClasses VERIFIED Lines 53-65: both functions present and passing

Plan 03-02 Artifacts

Artifact Expected Status Details
cmd/netsynth/main.go End-to-end pipeline wiring with encode.RunSynthesis VERIFIED Lines 105-122: full pipeline sequence present; import encode at line 19

Key Link Verification

Plan 03-01 Key Links

From To Via Status Details
classify/classifier.go classify/types.go hashBucket returns ClassUnknown1-4 constants WIRED Lines 93-99: explicit return ClassUnknown1/2/3/4 in switch cases
synth/config.go classify/types.go ClassFreqConfigs map keys include all 14 classes WIRED Lines 43-46: classify.ClassUnknown1 through classify.ClassUnknown4 present as map keys

Plan 03-02 Key Links

From To Via Status Details
cmd/netsynth/main.go encode/mp3.go encode.RunSynthesis(collectedSnapshots, outputPath) WIRED Line 110: if err := encode.RunSynthesis(collectedSnapshots, outputPath)
cmd/netsynth/main.go aggregate/summary.go PrintSummary called before RunSynthesis (D-08) WIRED Line 105 (PrintSummary) precedes line 110 (RunSynthesis); verified by line numbers

Data-Flow Trace (Level 4)

cmd/netsynth/main.go accumulates snapshots from the real packet capture pipeline (lines 94-98) and passes the populated slice to encode.RunSynthesis. encode.RunSynthesis counts total packets across snapshots before proceeding, ensuring zero-packet captures are rejected. The data path is: live interface -> capture.StartCapture -> classify.Classify -> aggregate.Aggregate -> collectedSnapshots -> encode.RunSynthesis. No static empty data is returned along the path.

Artifact Data Variable Source Produces Real Data Status
cmd/netsynth/main.go collectedSnapshots aggregate.Aggregate over snapshots channel Yes (from live capture) FLOWING
encode/mp3.go snapshots []classify.WindowSnapshot caller (main.go) Yes — zero-packet guard verifies FLOWING

Behavioral Spot-Checks

Behavior Command Result Status
Binary builds without errors go build -o /tmp/netsynth-verify ./cmd/netsynth exit 0, "BUILD OK" PASS
Full test suite passes go test ./... -count=1 All 6 packages pass PASS
No bare ClassUnknown in production code grep -rn 'ClassUnknown[^1-4]' classify/ synth/ encode/ cmd/ aggregate/ | grep -v test | grep -v // No output PASS
No TODO(phase-3) stubs remaining grep -rn 'TODO(phase-3)|_ = collectedSnapshots' cmd/ No output PASS
Commits documented in summaries exist git log --oneline -5 ff3ec7e and 0ab2c6e confirmed PASS

Requirements Coverage

Requirement Source Plan Description Status Evidence
CLAS-02 03-01 Unrecognized traffic is auto-clustered and assigned unique tones automatically SATISFIED hashBucket routes to ClassUnknown1-4 (classifier.go:80-101); 4 distinct FreqConfigs in synth/config.go:43-46
CAPT-03 03-02 Capture runs until user presses Ctrl+C, then gracefully flushes and saves MP3 SATISFIED (automated) / HUMAN_NEEDED (live MP3) signal.NotifyContext(main.go:63), RunSynthesis call(main.go:110), Saved message(main.go:121) — live MP3 playability requires human test

No orphaned requirements: REQUIREMENTS.md maps CLAS-02 and CAPT-03 exclusively to Phase 3 and both are covered by the phase plans.

Anti-Patterns Found

File Line Pattern Severity Impact
None — — — —

No TODOs, FIXMEs, placeholders, empty returns, or hardcoded empty data found in production files modified by this phase.

Human Verification Required

1. End-to-End Live Capture to MP3

Test:

  1. Build: go build -o ./netsynth ./cmd/netsynth
  2. Run: sudo ./netsynth -i lo -o /tmp/test-mvp.mp3
  3. In another terminal: ping -c 5 127.0.0.1
  4. Press Ctrl+C

Expected:

  • stderr shows: protocol summary (packet counts per class), then Encoding N windows to /tmp/test-mvp.mp3..., then Saved /tmp/test-mvp.mp3 (Xs, N KB, encoded in Xs)
  • ls -la /tmp/test-mvp.mp3 shows a non-zero file
  • ffprobe /tmp/test-mvp.mp3 2>&1 | head -20 reports a valid MP3 stream

Why human: Live packet capture requires CAP_NET_RAW and a real network interface. Confirming the MP3 is playable (not corrupt, correct duration) requires execution in a privileged environment.

2. Zero-Packet Error Handling

Test:

  1. Run: sudo ./netsynth -i lo -o /tmp/test-zero.mp3
  2. Press Ctrl+C immediately (before any traffic)

Expected:

  • stderr shows an error such as synthesis failed: no packets captured: output MP3 not written (empty capture produces no audio)
  • ls /tmp/test-zero.mp3 shows the file does NOT exist

Why human: Confirming no file is left on disk and the error message is clear requires executing the binary with real timing.

Gaps Summary

No automated gaps found. All 9 programmatically verifiable must-haves are confirmed. The single item requiring human verification (live MP3 production on a real interface) was anticipated in Plan 03-02 as a checkpoint:human-verify task and is expected pending human sign-off.

Verified: 2026-03-26 Verifier: Claude (gsd-verifier)

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