# Roadmap: NetSynth

## Milestones

- **v1.0 MVP** — Phases 1-4 (shipped 2026-03-26)
- **v1.1 Custom Sound Mappings** — Phases 5-7 (in progress)

## Phases

<details>
<summary>v1.0 MVP (Phases 1-4) — SHIPPED 2026-03-26</summary>

- [x] **Phase 1: Capture and Classification** - 4/4 plans — completed 2026-03-25
- [x] **Phase 2: Audio Synthesis Engine** - 3/3 plans — completed 2026-03-26
- [x] **Phase 3: Pipeline Integration and MVP** - 2/2 plans — completed 2026-03-26
- [x] **Phase 4: Power User Features** - 2/2 plans — completed 2026-03-26

Full details: `.planning/milestones/v1.0-ROADMAP.md`

</details>

### v1.1 Custom Sound Mappings (In Progress)

**Milestone Goal:** Users can customize how traffic sounds via a TOML config file — setting custom frequencies, waveform types, and their own classification rules with named sounds.

- [x] **Phase 5: Waveform Types and Bank Decoupling** - Internal refactors establishing waveform enum and injectable bank signature (completed 2026-03-26)
- [x] **Phase 6: Config Package and Sound Overrides** - TOML loading, auto-discovery, partial merge, and frequency/waveform overrides wired end-to-end (completed 2026-03-26)
- [x] **Phase 7: Custom Rules and Print-Config** - User-defined classification rules and --print-config UX (completed 2026-03-26)

## Phase Details

### Phase 5: Waveform Types and Bank Decoupling
**Goal**: Four waveform types are available per traffic class, and the synthesis bank accepts an injected config map instead of reading global state
**Depends on**: Phase 4
**Requirements**: WAVE-01, WAVE-02
**Success Criteria** (what must be TRUE):
  1. User can set a traffic class to square, sawtooth, or triangle waveform and hear a tonally distinct sound with no audible aliasing or buzzing artifacts
  2. Sine waveform continues to produce the same output as v1.0 — no regression
  3. The synthesis bank builds layers from a passed-in config map rather than a hardcoded class list
**Plans:** 2/2 plans complete

Plans:
- [x] 05-01-PLAN.md — Waveform types: WaveformType enum, WaveformPresetHarmonics, NewLayer resolution
- [x] 05-02-PLAN.md — Bank decoupling: NewBank injected config map, dynamic GainPerLayer, test updates

### Phase 6: Config Package and Sound Overrides
**Goal**: Users can create a TOML config file to override frequency and waveform per traffic class, with auto-discovery, partial override semantics, and clear validation errors
**Depends on**: Phase 5
**Requirements**: CFG-01, CFG-02, CFG-03, CFG-04, CFG-05
**Success Criteria** (what must be TRUE):
  1. User creates a `netsynth.toml` in the working directory with a custom Hz value and the tool uses that frequency for the specified class without touching other classes
  2. User runs the tool with no flags in a directory without a config file — it starts silently (no warning about missing config)
  3. User passes `--config /path/to/custom.toml` and the tool uses that file; if the file does not exist, the tool exits with a clear error before capture begins
  4. User types `frequncy = 440` in their config file and the tool exits at startup with an error naming `frequncy` as an unrecognized key
  5. User sets waveform for one class in TOML and leaves all other classes at their defaults — the unspecified classes are unchanged
**Plans:** 2/2 plans complete

Plans:
- [x] 06-01-PLAN.md — Config package: TOML load, validate, merge with TDD (config/config.go, config/config_test.go)
- [x] 06-02-PLAN.md — CLI wiring: --config flag, RunSynthesis signature change, main.go integration

### Phase 7: Custom Rules and Print-Config
**Goal**: Users can define their own traffic classification rules in TOML, assign custom sounds to them, and inspect the full effective config before capture begins
**Depends on**: Phase 6
**Requirements**: RULE-01, RULE-02, RULE-03, CFG-06
**Success Criteria** (what must be TRUE):
  1. User adds a `[[rules]]` block in TOML matching a custom port/protocol combination and hears a distinct tone for that traffic in the output MP3
  2. User-defined rules fire before built-in protocol rules — a custom rule for port 443 overrides the default HTTPS classification for packets on that port
  3. A user-defined class name gets its own synthesis layer automatically — no silence or missing audio for traffic matched by a custom rule
  4. User runs `netsynth --print-config` and sees the full effective config (defaults merged with their overrides) as commented TOML, without starting a capture
**Plans:** 2/2 plans complete

Plans:
- [x] 07-01-PLAN.md — Config extension: RawRule, LoadResult, rule validation, auto-freq assignment (TDD)
- [x] 07-02-PLAN.md — CLI wiring: --print-config flag, user rule prepend, PrintConfig output

## Progress

| Phase | Milestone | Plans Complete | Status | Completed |
|-------|-----------|----------------|--------|-----------|
| 1. Capture and Classification | v1.0 | 4/4 | Complete | 2026-03-25 |
| 2. Audio Synthesis Engine | v1.0 | 3/3 | Complete | 2026-03-26 |
| 3. Pipeline Integration and MVP | v1.0 | 2/2 | Complete | 2026-03-26 |
| 4. Power User Features | v1.0 | 2/2 | Complete | 2026-03-26 |
| 5. Waveform Types and Bank Decoupling | v1.1 | 2/2 | Complete   | 2026-03-26 |
| 6. Config Package and Sound Overrides | v1.1 | 2/2 | Complete   | 2026-03-26 |
| 7. Custom Rules and Print-Config | v1.1 | 2/2 | Complete   | 2026-03-26 |