# Tasks — network-plugin-protocol

> Blocked on: `network-core`.

## 1. Scaffold

- [x] 1.1 `packages/network/network-plugin-protocol/` with `package.json` (`@suaveplan/network-plugin-protocol@0.0.0`), `tsconfig.json`, `vitest.config.ts`, `README.md`.
- [x] 1.2 Workspace deps: `@suaveplan/network`, `@suaveplan/error`, `@suaveplan/types`, `@suaveplan/events`, `@suaveplan/bitpacker`, `@suaveplan/streams`, `@suaveplan/timing`, `@opentelemetry/api`, `zod`.
- [x] 1.3 `sideEffects: false`.

## 2. Types

- [x] 2.1 `src/types/protocol.types.ts` — `ProtocolHeader`, `ProtocolMessage`, `MessageType`.
- [x] 2.2 `src/types/pipeline.types.ts` — `PipelineConfig`, `PipelineStage`.
- [x] 2.3 `src/error-codes.ts` — `defineCodes("NET_PROTO", [...])`.

## 3. Binary protocol

- [x] 3.1 `src/protocol/binary-protocol.ts` — `BinaryProtocol`.
- [x] 3.2 Header: `version(1) | flags(1) | messageType(1) | timestamp(8) | payloadLength(2)` = 13 bytes.
- [x] 3.3 Version negotiation placeholder (v1 only for now).

## 4. Message encoder/decoder

- [x] 4.1 `src/encoder/message-encoder.ts` — schema-aware encoding with `@suaveplan/bitpacker`.
- [x] 4.2 `src/encoder/message-decoder.ts` — reverse decoding.
- [x] 4.3 Roundtrip test for all `MessageType` variants.

## 5. Protocol pipeline

- [x] 5.1 `src/pipeline/protocol-pipeline.ts` — `ProtocolPipeline`.
- [x] 5.2 Outgoing: `MessageEncoder` → `lengthPrefixEncode` → `CryptoTransform` → `compressStream`.
- [x] 5.3 Incoming: reverse order with `decompressStream`, `CryptoTransform`, `lengthPrefixDecode`, `MessageDecoder`.
- [x] 5.4 Error handling: `StreamPipeFailedError` on any stage failure.

## 6. Plugin wrapper

- [x] 6.1 `src/plugin/protocol-plugin.ts` — `ProtocolPlugin` implements `NetworkPlugin`.
- [x] 6.2 Installs protocol, encoder, decoder, pipeline on `install()`.

## 7. Spec

- [x] 7.1 Update `openspec/specs/network/spec.md` with `NET-16`, `NET-17`.

## 8. Conformance tests

- [x] 8.1 `src/protocol/protocol.spec-conformance.test.ts` — header format, version, flags.
- [x] 8.2 `src/encoder/encoder.spec-conformance.test.ts` — schema encoding, roundtrip.
- [x] 8.3 `src/pipeline/pipeline.spec-conformance.test.ts` — pipeline ordering, error handling.
- [x] 8.4 `src/error-codes.spec-conformance.test.ts` — frozen registry.

## 9. Serialization strategy framework

- [x] 9.1 `src/serialization/serializer-factory.ts` — `SerializerFactory`, registers by content type.
- [x] 9.2 `src/serialization/json-serializer.ts` — `JsonSerializer`.
- [x] 9.3 `src/serialization/binary-serializer.ts` — `BinarySerializer` with optional compression.
- [x] 9.4 `src/serialization/msgpack-serializer.ts` — `MessagePackSerializer`.
- [x] 9.5 Content-type negotiation via header flags.

## 10. Priority queue & adaptive batching

- [x] 10.1 `src/queue/priority-message-queue.ts` — `PriorityMessageQueue`, 5 tiers, FIFO within tier.
- [x] 10.2 `src/batcher/message-batcher.ts` — `MessageBatcher`, flush on size/time/priority.
- [x] 10.3 `src/backpressure/backpressure-controller.ts` — `BackpressureController`, slows on overwhelm.
- [x] 10.4 CRITICAL messages bypass queue entirely.

## 11. Message TTL & loop detection

- [x] 11.1 `src/ttl/message-ttl.ts` — `MessageTTL`, decrements per hop, drops at zero.
- [x] 11.2 `src/loop/loop-detector.ts` — `LoopDetector`, checks `visitedNodes` for cycles.
- [x] 11.3 `src/dedup/duplicate-detector.ts` — `DuplicateDetector`, bloom filter for broadcast dedup.

## 12. Route caching

- [x] 12.1 `src/cache/route-cache.ts` — `RouteCache`, `(source, target) → nextHop`.
- [x] 12.2 Invalidation on `topology:changed` bus event.
- [x] 12.3 Adaptive size based on memory availability.

## 13. Spec

- [x] 13.1 Update `openspec/specs/network/spec.md` with `NET-45`, `NET-57`, `NET-58`, `NET-59`.

## 14. Conformance tests

- [x] 14.1 `src/serialization/serialization.spec-conformance.test.ts` — factory, JSON, Binary, MessagePack.
- [x] 14.2 `src/queue/queue.spec-conformance.test.ts` — 5 tiers, FIFO, CRITICAL bypass.
- [x] 14.3 `src/batcher/batcher.spec-conformance.test.ts` — grouping, flush triggers, adaptive.
- [x] 14.4 `src/backpressure/backpressure.spec-conformance.test.ts` — detection, slowdown, recovery.
- [x] 14.5 `src/ttl/ttl.spec-conformance.test.ts` — hop decrement, drop at zero.
- [x] 14.6 `src/loop/loop.spec-conformance.test.ts` — cycle detection, visited tracking.
- [x] 14.7 `src/dedup/dedup.spec-conformance.test.ts` — bloom filter, false positive tolerance.
- [x] 14.8 `src/cache/cache.spec-conformance.test.ts` — caching, invalidation, memory bounds.

## 15. Verify

- [x] 15.1 `bunx turbo lint typecheck test --filter=@suaveplan/network-plugin-protocol` green.
- [x] 15.2 `bunx turbo test:coverage --filter=@suaveplan/network-plugin-protocol` 100/100/100/100.
- [x] 15.3 `bun scripts/openspec-conformance.ts @suaveplan/network-plugin-protocol` PASS.