gurix
f02231a690
- Advance to Plan 2 of 3 in Phase 02 - Mark SYNTH-01, SYNTH-02 requirements complete - Record decisions: go-lame v0.0.9, no go-audio/wav
95 lines
4.0 KiB
Markdown
95 lines
4.0 KiB
Markdown
---
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gsd_state_version: 1.0
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milestone: v1.0
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milestone_name: milestone
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status: Ready to execute
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stopped_at: "Completed 02-01: synth config, oscillator, and layer"
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last_updated: "2026-03-26T10:59:51.259Z"
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progress:
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total_phases: 4
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completed_phases: 1
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total_plans: 7
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completed_plans: 4
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---
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# Project State
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## Project Reference
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See: .planning/PROJECT.md (updated 2026-03-24)
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**Core value:** Network traffic patterns are instantly recognizable as distinct sounds — a ping sounds different from HTTPS noise, which sounds different from a port scan.
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**Current focus:** Phase 02 — audio-synthesis-engine
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## Current Position
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Phase: 02 (audio-synthesis-engine) — EXECUTING
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Plan: 2 of 3
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## Performance Metrics
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**Velocity:**
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- Total plans completed: 0
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- Average duration: —
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- Total execution time: —
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**By Phase:**
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| Phase | Plans | Total | Avg/Plan |
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|-------|-------|-------|----------|
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| - | - | - | - |
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**Recent Trend:**
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- Last 5 plans: —
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- Trend: —
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*Updated after each plan completion*
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| Phase 01 P01 | 4 | 2 tasks | 6 files |
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| Phase 01 P03 | 8 | 2 tasks | 4 files |
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| Phase 01-capture-and-classification P02 | 3min | 1 tasks | 4 files |
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| Phase 01-capture-and-classification P04 | 15min | 2 tasks | 2 files |
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| Phase 02 P01 | 15min | 2 tasks | 8 files |
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## Accumulated Context
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### Decisions
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Decisions are logged in PROJECT.md Key Decisions table.
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Recent decisions affecting current work:
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- Use `github.com/gopacket/gopacket` v1.5.0 (community fork) — NOT `google/gopacket` which is unmaintained
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- Use `github.com/packetcap/go-pcap` for live capture (pure Go, no CGo for capture layer)
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- Use `github.com/sjzar/go-lame` v0.0.9 for MP3 encoding (embeds LAME C source, CGo required at build time only)
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- Audio synthesis: hand-rolled additive sine oscillators + EMA amplitude smoothing (no external audio library)
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- Frequency table: register-separated harmonics (low drones = bulk traffic, mid = control, high = interactive)
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- [Phase 01]: Go installed to /home/dev/tools/go-install/go (no sudo); PATH export required each session
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- [Phase 01]: Classifier uses ordered []Rule slice with first-match-wins; no switch statement (D-02)
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- [Phase 01]: ICMP checked before TCP/UDP in Classify to handle packets with no port info
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- [Phase 01]: DefaultWindowMs=500: 500ms windows balance temporal resolution against snapshot frequency for audio synthesis
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- [Phase 01]: io.Writer injection in PrintSummary/PrintWindowLine enables test capture via bytes.Buffer and production use via os.Stderr
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- [Phase 01-capture-and-classification]: Use net.Interfaces() for listing (go-pcap has no FindAllDevs equivalent); privileges not required for enumeration
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- [Phase 01-capture-and-classification]: StartCapture uses 512-buffered channel with atomic drop counter to prevent backpressure blocking capture goroutine
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- [Phase 01-capture-and-classification]: Dynamic link type detection via handle.LinkType() not hardcoded LinkTypeEthernet
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- [Phase 01-04]: Cobra RunE + signal.NotifyContext for clean shutdown: context cancellation is the single stop signal propagating through all three pipeline stages
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- [Phase 01-04]: Three-stage pipeline: capture -> classify goroutine -> aggregate via buffered channels; 1024-buffered classified channel absorbs burst processing
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- [Phase 02]: go-lame v0.0.9 used for MP3 encoding (embedded LAME C source, no system library needed)
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- [Phase 02]: go-audio/wav excluded — writing PCM bytes directly to LameWriter is simpler (per Claude's Discretion grant in CONTEXT.md)
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### Pending Todos
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None yet.
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### Blockers/Concerns
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- Phase 2: Frequency mapping requires subjective listening validation — specific Hz values not determined by research; must test during Phase 2
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- Phase 3: Auto-clustering algorithm choice (hash-bucketing vs k-means) deferred until synthesis engine exists to evaluate perceptual results
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- macOS privilege model (BPF device vs CAP_NET_RAW) not verified by research — flag if macOS is a target during Phase 1
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## Session Continuity
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Last session: 2026-03-26T10:59:51.252Z
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Stopped at: Completed 02-01: synth config, oscillator, and layer
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Resume file: None
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