# OpenSpec Change: network-discovery-trystero

- **Change ID**: network-discovery-trystero
- **Package**: `@suaveplan/network-discovery-trystero`
- **Category**: browser
- **Target path**: `packages/network/network-discovery-trystero`
- **Status**: PROPOSED
- **Date**: 2026-05-11
- **Parent**: `network-transport-family` (2026-05-11) — Wave 2
- **Migration source**: `../suaveplan/packages/browser/network-discovery-trystero` + `../suaveplan/enterprise/network-discovery-trystero.md`

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## Summary

Migrate `@suaveplan/network-discovery-trystero` as a browser-tier `DiscoveryStrategy` for `@suaveplan/network`. Serverless WebRTC peer discovery via [Trystero](https://github.com/dmotz/trystero), with four interchangeable transports: BitTorrent trackers, Nostr relays, MQTT brokers, IPFS libp2p pubsub.

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## Current-state audit

Upstream source layout (`../suaveplan/packages/browser/network-discovery-trystero/src/`):

- `trystero-discovery.ts` (259 L) — orchestrator
- `message-handlers.ts` (186 L)
- `room-config.ts` (178 L) — per-strategy room config
- `types-messages.ts` (176 L), `types-config.ts` (158 L)
- `intervals.ts` (132 L)
- `fallback.ts` — auto-fallback between transports
- `event-emitter.ts` — typed events

See `../suaveplan/enterprise/network-discovery-trystero.md` for full upstream surface inventory.

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## Parity Checklist

| Capability | Upstream | Migrated | Notes |
|---|---|---|---|
| `DiscoveryStrategy` impl | ✅ | ✅ | |
| 4 transports (torrent / nostr / mqtt / ipfs) | ✅ | ✅ | Each transport selectable at construction. |
| Inter-transport fallback | ✅ | ✅ | Reuses `@suaveplan/retry` for backoff. |
| Public relay defaults | ⚠️ (insecure) | ⬆️ | Relay list REQUIRED in options; constructor throws `INVALID_OPTIONS` if missing. |
| Structured errors | 🚫 | ⬆️ | `defineCodes` registry with strategy-specific codes. |
| Zod boundary validation | 🚫 | ⬆️ | Every public option struct. |
| OTel instrumentation | 🚫 | ⬆️ | Spans + counters + histograms keyed by strategy. |
| AbortSignal | 🚫 | ⬆️ | Threaded through `start`/`stop`/`connect`. |
| `export *` barrels | check | ⬆️ | Convert to explicit named exports per §6a. |
| Test-runner imports | direct vitest | ⬆️ | Rewrite to `@suaveplan/testing/runner` per §7. |
| 100% test coverage | 🚫 | ⬆️ | Bring to 100/100/100/100. |
| Property tests | 🚫 | ⬆️ | fast-check property suite where applicable. |

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## Available workspace deps on genesis

- `@suaveplan/network` ✅
- `@suaveplan/network-bootstrap` ⬅ Wave 1
- `@suaveplan/service-discovery` ⬅ Wave 1
- `@suaveplan/types`, `@suaveplan/error`, `@suaveplan/events`, `@suaveplan/timing` ✅
- `@suaveplan/testing` ✅
- External: `trystero` — add to root catalog under `network-discovery`.

**Blocking note.** Wave 1 must land first.

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## Acceptance gate

1. `bunx turbo lint typecheck test --filter=@suaveplan/network-discovery-trystero` green.
2. `bunx turbo test:coverage --filter=@suaveplan/network-discovery-trystero` 100/100/100/100.
3. `bun run docs:check` green (sibling `.md` per `.ts`).
4. `STATUS.md` row flipped from `–` to `✅`.
5. `network-bootstrap` chain integration test demonstrates this strategy as a working entry.

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## Out of scope

- Hosting / running any required relays or trackers (deployment concern).
- React Storybook stories — discovery is a universal/headless tier; UI lives in a dedicated devtools package (future).