gurixandClaude Opus 4.6
1230fd1b9d
Archive roadmap and requirements to milestones/, reorganize ROADMAP.md, evolve PROJECT.md with shipped state, create retrospective. 4 phases, 11 plans, 16/16 requirements — all complete. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Retrospective
Milestone: v1.0 — MVP
Shipped: 2026-03-26 Phases: 4 | Plans: 11 | Timeline: 3 days (2026-03-24 -> 2026-03-26) LOC: 3,254 Go | Files: 84 modified
What Was Built
- Config-driven packet classifier with 12 protocol rules and 4 hash-bucketed unknown classes
- Live packet capture via pure Go go-pcap with privilege detection and non-blocking channel pipeline
- Additive synthesis engine: per-class oscillators, EMA amplitude smoothing, constant-power stereo mixing
- MP3 encoding via embedded LAME, zero-packet guard
- End-to-end pipeline with clean Ctrl+C shutdown
- BPF filter and offline pcap file sonification with timestamp-based windowing
What Worked
- Risk-ordered phases: hardest foundation first (capture), then synthesis in isolation, then integration — no phase blocked on another's bugs
- TDD approach in executor agents caught signature mismatches early
- Pure Go capture layer (go-pcap) avoided libpcap dependency headaches
- Hand-rolled synthesis kept dependencies minimal and code understandable
- Wave-based parallel execution for independent plans
What Was Inefficient
- Some SUMMARY.md files had empty one-liner fields, causing noisy milestone extraction
- Phase 4 research could have been lighter — BPF/pcap APIs were straightforward
Patterns Established
- Ordered []Rule slice for classifier (first-match-wins, extensible)
- io.Writer injection for testable stderr output
- Buffered channels between pipeline stages (512-1024) to absorb bursts
- Package-level globals for Cobra flag binding
- Timestamp-based windowing for non-live sources
Key Lessons
- Embedding C source (go-lame) is a good tradeoff: CGo at build time only, no runtime dependency
- go-audio/wav was unnecessary — writing PCM bytes directly to LameWriter is simpler
- Hash-bucketed unknowns (4 classes) are sufficient for audio distinction without k-means complexity
Cross-Milestone Trends
| Metric | v1.0 |
|---|---|
| Phases | 4 |
| Plans | 11 |
| Days | 3 |
| LOC | 3,254 |
| Avg plan duration | ~8 min |