yoloyolo/.planning/STATE.md

gsd_state_version, milestone, milestone_name, status, stopped_at, last_updated, progress

gsd_state_version	milestone	milestone_name	status	stopped_at	last_updated	progress
1.0	v1.0	milestone	Ready to plan	Completed 02-03: MP3 encoder and CLI output flag	2026-03-26T11:15:26.052Z	total_phases completed_phases total_plans completed_plans 4 2 7 7

Project State

Project Reference

See: .planning/PROJECT.md (updated 2026-03-24)

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. Current focus: Phase 02 — audio-synthesis-engine

Current Position

Phase: 3 Plan: Not started

Performance Metrics

Velocity:

• Total plans completed: 0
• Average duration: —
• Total execution time: —

By Phase:

Phase	Plans	Total	Avg/Plan
-	-	-	-

Recent Trend:

• Last 5 plans: —
• Trend: —

Updated after each plan completion | Phase 01 P01 | 4 | 2 tasks | 6 files | | Phase 01 P03 | 8 | 2 tasks | 4 files | | Phase 01-capture-and-classification P02 | 3min | 1 tasks | 4 files | | Phase 01-capture-and-classification P04 | 15min | 2 tasks | 2 files | | Phase 02 P01 | 15min | 2 tasks | 8 files | | Phase 02 P02 | 10min | 2 tasks | 4 files | | Phase 02 P03 | 3min | 2 tasks | 3 files |

Accumulated Context

Decisions

Decisions are logged in PROJECT.md Key Decisions table. Recent decisions affecting current work:

• Use github.com/gopacket/gopacket v1.5.0 (community fork) — NOT google/gopacket which is unmaintained
• Use github.com/packetcap/go-pcap for live capture (pure Go, no CGo for capture layer)
• Use github.com/sjzar/go-lame v0.0.9 for MP3 encoding (embeds LAME C source, CGo required at build time only)
• Audio synthesis: hand-rolled additive sine oscillators + EMA amplitude smoothing (no external audio library)
• Frequency table: register-separated harmonics (low drones = bulk traffic, mid = control, high = interactive)
• [Phase 01]: Go installed to /home/dev/tools/go-install/go (no sudo); PATH export required each session
• [Phase 01]: Classifier uses ordered []Rule slice with first-match-wins; no switch statement (D-02)
• [Phase 01]: ICMP checked before TCP/UDP in Classify to handle packets with no port info
• [Phase 01]: DefaultWindowMs=500: 500ms windows balance temporal resolution against snapshot frequency for audio synthesis
• [Phase 01]: io.Writer injection in PrintSummary/PrintWindowLine enables test capture via bytes.Buffer and production use via os.Stderr
• [Phase 01-capture-and-classification]: Use net.Interfaces() for listing (go-pcap has no FindAllDevs equivalent); privileges not required for enumeration
• [Phase 01-capture-and-classification]: StartCapture uses 512-buffered channel with atomic drop counter to prevent backpressure blocking capture goroutine
• [Phase 01-capture-and-classification]: Dynamic link type detection via handle.LinkType() not hardcoded LinkTypeEthernet
• [Phase 01-04]: Cobra RunE + signal.NotifyContext for clean shutdown: context cancellation is the single stop signal propagating through all three pipeline stages
• [Phase 01-04]: Three-stage pipeline: capture -> classify goroutine -> aggregate via buffered channels; 1024-buffered classified channel absorbs burst processing
• [Phase 02]: go-lame v0.0.9 used for MP3 encoding (embedded LAME C source, no system library needed)
• [Phase 02]: go-audio/wav excluded — writing PCM bytes directly to LameWriter is simpler (per Claude's Discretion grant in CONTEXT.md)
• [Phase 02]: GainPerLayer applied in bank.go during mixing to ensure 11 max layers sum to 1.0 (D-10)
• [Phase 02]: int16 conversion uses float * 32767 to avoid positive overflow at exactly +1.0
• [Phase 02]: RunSynthesis takes snapshot slice (not channel) enabling zero-packet guard before file creation
• [Phase 02]: EncodeMP3 and RunSynthesis are separate functions for independent testability

Pending Todos

None yet.

Blockers/Concerns

• Phase 2: Frequency mapping requires subjective listening validation — specific Hz values not determined by research; must test during Phase 2
• Phase 3: Auto-clustering algorithm choice (hash-bucketing vs k-means) deferred until synthesis engine exists to evaluate perceptual results
• macOS privilege model (BPF device vs CAP_NET_RAW) not verified by research — flag if macOS is a target during Phase 1

Session Continuity

Last session: 2026-03-26T11:09:30.191Z Stopped at: Completed 02-03: MP3 encoder and CLI output flag Resume file: None